A student has two flasks of growing algae. to one flask he adds some phosphorus, while he leaves the other flask alone. At the end of the day both populations are stable, but the phosphorus-containing flask has 10 times more algae as the phosphorus increased the carrying capacity of the environment.
Too much phosphorus can promote the growth of algae and large aquatic plants, resulting in lower levels of dissolved oxygen- a process known as eutrophication. High phosphorus levels can also cause algae blooms, which can produce algal toxins that are harmful to human and animal health.
Phosphorus (P) is a necessary element for plant and animal growth, as well as for profitable crop and livestock production. It can also boost surface water biological productivity by hastening eutrophication, the natural aging of lakes and streams caused by nutrient enrichment.
Phosphorus, like nitrogen, is an essential nutrient for all life. Phosphate (PO4) is the most common form of phosphorus used by biological organisms, and it is important in the formation of DNA, cellular energy, and cell membranes (and plant cell walls). Commercial fertilizers frequently contain phosphorus.
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which event does not take place before the start of mitosis? view available hint(s)for part a which event does not take place before the start of mitosis? dna is replicated. the parent cell grows. the nuclear envelope disintegrates. organelles proliferate.
which of the following dinner menu items would provide the most zinc? if you're not sure, use the single nutrients report for zinc in nutritioncalc plus
The best sources of zinc are oysters and red and white meat as well as poultry. Additional top sources include beans, almonds, crab, lobster, whole grains, breakfast cereals, and dairy goods.
What is an excellent source for both zinc and iron?Cereals and meat are the main sources of iron and zinc, with fortified iron and zinc possibly making a significant contribution.
Which foods are high in zinc?Meat, fish, and seafood are the food types that contain the most zinc [3]. The highest source of zinc per serving is found in oysters, while beef makes up 20% of Americans' daily zinc consumption since it is so widely consumed [7]. Zinc is also present in dairy and eggs [3].
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the suborder prosimians includes: group of answer choices only nocturnal species only diurnal species diurnal and nocturnal baboons diurnal and nocturnal lemurs
The answer is D. Diurnal and nocturnal lemurs. Prosimians are primarily nocturnal, in contrast to other primates, which are primarily diurnal (with the sole exception of the night monkey, Aotus). There are some diurnal forms only among lemurs.
Lemurs belong to the order of primates, which also includes monkeys, apes, and humans. Currently, there are around 32 distinct varieties of lemurs, all of which are native to Madagascar, a single island nation off the southeast coast of Africa. Anthropoids and prosimians are the two suborders of primates. Humans, apes, and monkeys are anthropoid species. Prosimians are lemurs. Other prosimians include tarsiers in Borneo and the Philippines, lorises in Asia, and galgoes (bushbabies) in Africa. Prosimians, which differ from all other primates in having wet nostrils, rely on their sense of smell to discriminate between members of their social groups and to decide what foods are acceptable to eat. Prosimians groom themselves and others like other primates, but they are unable to use their fingers.
The complete question is:
The suborder prosimians includes: a. only nocturnal species. b. only diurnal species. c. diurnal and nocturnal galagos. d. diurnal and nocturnal lemurs.
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if a node has a balance factor 2 and its right child node has a balance factor 1 or 0. this node is . rr imbalance rl imbalance lr imbalance ll imbalance
accurate response:-The rotation with the balancing factor at its node is the LL rotation.
The AVL tree depicted in the following figure needs to have one element inserted into the left sub-tree of A. The crucial node A's presence can cause the tree to lose its equilibrium. The critical node is the node whose balance factor does not fall between -1 and 1.
If the new node is added into the left or right sub-tree of the critical node A, RL rotations must be carried out. Let's say Node B serves as the root of the critical node's right sub-tree, and Node C serves as the root of the sub-tree into which the new node is put.
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if plants are grown with h2o containing a radioactive isotope of oxygen (18o), subsequent analysis will show that 18o first appears in which of the following molecules produced by the plants?
Cells create sugar molecules and oxygen during the process of photosynthesis by using carbon dioxide and energy from the sun. These sugar molecules serve as the building blocks for more complex molecules like glucose in the photosynthetic cell.
What molecules do plants contain?They consist of abscisic acid, ethylene, auxin, cytokinins, gibberellins, and auxin. Most plant cells produce small molecules known as growth regulators.
Which organic molecules are produced by plants?Glucose is an organic molecule that is the product of photosynthesis, providing food for plants and for many other organisms. The chemical formula for glucose is C6 H12 O6, and so plants need to take in carbon, hydrogen, and oxygen to produce it.
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what structure allows members of class chondrichthyes to detect electric fields caused by nearby animals?
Sharks have devices known as ampullae of Lorenzini that enable them to recognize the electromagnetic fields produced by all living things, including their prey. Only aquatic or amphibious animals have electroreception been documented.
How are Chondrichthyes structured?The skeletons of all members of the Chondrichthyes lack true bone and are instead made of cartilage. Only their teeth and occasionally their vertebrae have calcified cartilage, and this calcified cartilage is not the same as true bone.
The skeleton of cartilaginous fish, also known as Chondrichthyes in science, is made of cartilage rather than bone. Because cartilage is strong and flexible, it can support these fish's structural needs while still allowing them to grow to enormous sizes. Sharks, rays, skates, and chimaeras are some examples of cartilaginous fish.
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Which of the following describes a vector? An animal that can serve as an alternative host or source of the pathogen for new infections A disease that was previously unknown or has recently begun spreading to a new region A disease-causing agent An animal that carries a pathogen from one host to the next
A vector species could be described as an animal that carries a pathogen from one host to the next.
A vector is a living creature that spreads an infectious agent from one diseased animal to another. Mosquitoes, ticks, flies, fleas, and lice are common arthropod vectors.
A mosquito, for example, spreads malaria from person to person. Pathogens are organisms that cause illness in other organisms. The pathogen in this case is the malarial parasite.
In molecular biology, a vector is a DNA molecule (typically a plasmid or virus) that is used as a vehicle to deliver a specific DNA segment into a host cell as part of a cloning or recombinant DNA process.
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a region of a dna strand (or a sequence of nucleotides) that codes for a particular protein (form of a trait) is called a
A region of a dna strand (or a sequence of nucleotides) that codes for a particular protein (form of a trait) is called a coding region.
The coding region of a gene, also called the coding sequence (CDS), is the portion of the gene's DNA or RNA that encodes a protein.
The coding region of a gene is the part of the gene that is ultimately transcribed and translated into protein.Sum of its exons. The remainder of the gene is dotted with introns or regions that are clipped and ejected during RNA splicing.
The code for each gene uses four nucleotide bases of DNA.
Adenine (A), Cytosine (C), Guanine (G), and Thymine (T) - different ways to spell the three-letter "codon" that indicates which amino acid is required at each position in the protein.
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gluts are integral membrane proteins that assist in the facilitated diffusion of glucose into and out of cells. what reaction in glycolysis prevents glucose from being transported back out of the cell?
In glycolysis, hexokinase dephosphorylation prevents the transport of glucose back out of the cell.
How hexokinase dephosphorylation prevents the transport of glucose back out of the cell?With the help of ATP, hexokinase dephosphorylates glucose, resulting in a nonpolar glucose molecule that cannot pass through the hydrophilic region of the plasma membrane.
When glucose is phosphorylated by hexokinase utilising ADP, a polar glucose molecule is produced that cannot pass through the hydrophobic core of the plasma membrane.
The nonpolar glucose molecule produced by hexokinase's dephosphorylation of glucose using ADP is unable to pass the hydrophilic region of the plasma membrane.
Using ATP, hexokinase converts glucose to a polar form that cannot pass through the hydrophobic core of the plasma membrane.
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in a population of 10,000 organisms, over a one-year period, there are 750 births and 130 deaths. calculate the growth rate for that year.
Then the growth rate is 620/10,000 = 0.062% and the growth factor is
1 +0.062%
= 1.00062
T
he change in the population in one year is ..
750 -130= 620
I will contribute to the answer in order to aid the learner in broadening his or her knowledge. This is done in the hopes that the student would learn something that will assist him with his schoolwork or upcoming exams.
A limiting factor is something that regulates the expansion or size of a population. The letter is the response.
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true/false: there are 3 primary ossification centers in the typical vertebra; 1 for the vertebral body and 2 for the posterior arch.
Primary ossification centres in total three centres for ossification yes it is true statement
There are three ossification centres per vertebra, with the exception of coccygeal vertebrae: one in the body of the vertebra and one in either neural arch [1-3, 12, 21]. Beginning as early as week 8 in the axis, the first vertebral body ossification centres form in the arches of the upper cervical vertebrae, and they then advance caudally.
A primary ossification centre is the source of intramembranous and endochondral ossification. As its name suggests, the primary ossification centre is the point at which bone tissue begins to ossify. Primary ossification centres are typically located in the body of irregular bones or in the diaphysis of long bones.
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who was the first to clearly identify and name individual cells? who was the first to clearly identify and name individual cells? anton van leeuwenhoek theodore schwann matthias schleiden robert hooke
The term "cell" was initially applied to these minute units of life in 1665 by a British scientist by the name of Robert Hooke. One of the first scientists to examine living creatures under a microscope was Hooke.
Robert Hooke, who was he?
A scientist from the 17th century named Robert Hooke made contributions to our understanding of mathematics, mechanics, biology, and astronomy (opens in new tab). Though Hooke is likely best known for his discovery of the living cell, he is also well known for his discoveries of the law governing elastic material's ability to stretch, improvements to weather monitoring technology, and new astronomical objects.
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which of the following is part of the cell duplication machinery found in animals, but not in plants?cell platecentrosomemicrotubular organizing centerlysosomes
Answer: centrosomes
Explanation:
15. Crushing large stones into smaller stones is an example of a
b. chemical change
a. physical change
c. both a. and b.
d. a change in mass
the two major macromolecules that are used for use as sources of energy during the absorptive state are
Two major macromolecules that are used for use as sources of energy during the absorptive state are glucose and triglycerides.
Macromolecules are very large molecules that are important for biophysical processes such as proteins and nucleic acids. It is made up of thousands of covalently bonded atoms. Many macromolecules are polymers of small molecules known as monomers.
Blood sugar or glucose is the primary sugar withinside the blood. It is obtained from the food you eat and is your body's primary source of energy.The blood carries glucose to each cell of the body for use as energy.Diabetes is a disease in which blood sugar levels are too high.
Triglycerides are a form of fat (lipid) located withinside the blood.When you eat, your body converts calories that it doesn't need to use immediately into triglycerides. Triglycerides are stored in fat cells.The hormone then releases triglycerides during meals for energy.
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Yabine is studying energy from food in her nutrition class. She learns that fats, proteins, and carbohydrates can store different amounts of energy because they have different chemical __________ and different numbers of energy storing chemical bonds.
structures
Yabine learns that fats, proteins, and carbohydrates can store different amounts of energy because they have different chemical structures and different numbers of energy storing chemical bonds.
Proteins are the polymers of amino acids. The amino acids are connected together by peptide bonds. The proteins play numerous functions inside the body like enzymes, signaling molecules, energy source, receptor, transporter, etc.
Chemical bonds are the attraction forces between atoms or molecules that mediate the formation of large structures. These bonds are of two types: covalent bonds and non-covalent bonds. Covalent bonds are the strongest type of bonds that cannot be broken easily.
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A trait that is found in and shared by two or more species, but is not derived from a common ancestor is known as.
A trait that is found in and shared by two or more species, but is not derived from a common ancestor, is known as Analogous traits.
This is because these traits have developed independently in each species, without a direct relationship with the ancestors.
The Significance of Analogical Traits in EvolutionThese traits have important significance in the evolution of species, as they can help biologists understand how new species form and how they adapt to their environment, developing characteristics that allow them to survive better through natural selection.
For example, two bird species may develop similar wings, even though they have no common ancestor. This is because they both need to fly to survive and the pressure of natural selection has led them to develop similar wings. This shows that natural selection plays an important role in the development of these traits and how they contribute to the evolution of all species.
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Which if the following muscles contract concentrically to cause extension of the head, right cervical rotation, and right cervical lateral flexion?
The right splenius capitis contract concentrically to cause extension of the head, right cervical rotation, and right cervical lateral flexion.
Deep in the neck lies a muscle known as the splenius capitis. It comes from the superior 3 thoracic vertebrae, the 7th cervical vertebra's spinous processes, and the lower half of the nuchal ligament.
It attaches to the temporal bone's mastoid process. It causes the neck to twist and flex laterally. It receives innervation from the 2nd and 3rd cervical spinal nerves' posterior rami. It is a component of the neck's posterior triangle's floor.
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seals in an aquarium will repeat certain behaviors, such as slapping and barking, that prompt people to toss them a herring. this best illustrates:
In an aquarium, seals will repeatedly exhibit actions like slapping and barking that cause people toss them a herring. This is an example of operant conditioning.
What is operant conditioning?Operant conditioning, often known as instrumental conditioning, is a teaching strategy that use rewards and penalties to alter behavior. Through operant training, actions that are rewarded are more likely to be repeated than actions that are penalized.
Over the past 60 years, the practice of training animals with positive reinforcement has grown in popularity. It gave rise to the training methods used today, where the animals assist with their own care and show visitors their natural behaviors. Operant conditioning is a type of training where the seals' actions are altered by positive reinforcement, increasing the likelihood that they would repeat the behaviour when requested.
We employ a number of reinforcements when working with seals, but the most well-liked is a fish snack. Trainers also offer games and even cubes of gelatin. A seal receives a fish as compensation for complying with a command. The trainers will wait a short while before trying again if the seal doesn't comply with their instructions.
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the subunit of what transcription factor catalyzes the phosphorylation of rna polymerase ii? the subunit of what transcription factor catalyzes the phosphorylation of rna polymerase ii? tfiif tfiib tfiih tfiie
General transcription factor IIH catalyzes the phosphorylation of RNA polymerase II.
What is phosphorylation?Sugar phosphorylation is frequently the first stage of catabolism. Because the phosphate group prevents the molecules from diffusing back across the transporter, phosphorylation allows cells to accumulate sugars. Glucose phosphorylation is an important reaction in sugar metabolism. Hepatic cells are permeable to glucose, and the rate-limiting step in glucose metabolism by the liver (ATP-D-glucose 6-phosphotransferase and non-specific hexokinase) is the initial rate of phosphorylation of glucose (ATP-D-hexose 6-phosphotransferase).
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sexual selection in males usually results in an increased ability to for mates, whereas sexual selection in females usually involves a mate with the best fitness
Disparities in mate attraction that alone account for differences in reproductive success An important aspect of evolutionary biology is sexual selection. The nature and scope of sexual selection, however, have been debatable since Darwin first proposed the idea of it.
Recent debate has brought the fundamental topic of what sexual selection actually is back into focus. Incorporating female-female reproductive rivalry into sexual or natural selection is one example of this.
Sex roles are determined by differences in gametes: men generate significantly more plentiful, smaller, motile gametes whereas females produce relatively fewer, more nutritious, often non-motile gametes. There will be an excess of male gametes that will not fertilize any eggs since just one gamete of each kind is necessary to generate a child.
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In the carbon reduction phase of the Calvin cycle, electrons from NADPH are donated to a metabolic intermediate to form G3P molecules.
Which statement is NOT true regarding G3P?
A.G3P molecules are involved in the regeneration of RuBP.
B.G3P molecules affect the activity of the enzyme rubisco.
C.G3P molecules have more potential energy than PGA molecules.
D.G3P molecules are used to synthesize glucose and other sugars.
G3P molecules affect the activity of the enzyme rubisco is false.
RuBisCO, an enzyme, works with RuBP, another molecule, to catalyze a reaction with CO2.
What happens in calvin cycle?The carbon from the carbon cycle gets fixed into sugars during a cycle of chemical reactions. It takes place in the plant's chloroplast. Fixation, reduction, and regeneration are the three fundamental phase of the Calvin cycle reactions .The enzyme RuBisCO and the molecule ribulose bisphosphate are both present in the stroma in addition to CO2 to start the Calvin cycle (RuBP). RuBP has two phosphate groups and five carbon atoms. RuBP reacts with CO2 to produce a six-carbon molecule, which is then split into two three-carbon compounds by the action of RuBisCO. Because CO2 is "fixed" from its inorganic state into organic molecules, this process is known as carbon fixation. The three-carbon compound 3-PGA is changed into another three-carbon compound called G3P by ATP and NADPH using their stored energy. This kind of reaction is referred to as a reduction reaction. There is a gain of an electron. To help produce the carbohydrate molecule, which is often glucose, one of the G3P molecules exits the Calvin cycle (C6H12O6). One carbohydrate molecule requires six rounds of the Calvin cycle to produce since it contains six carbon atoms (one for each carbon dioxide molecule fixed). Remaining G3P molecules renew RuBP, again allowing to get started with the carbon-fixation stage. Additionally, ATP is used to restore RuBP.
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The citric acid cycle is a stage of catabolism that oxidizes acetate into carbon dioxide and generates energy. There are eight enzymes involved in the citric acid cycle Which enzymes produce NADH as a product? Select all that apply Which enzymes produce carbon dioxide asa product? Select all that apply. α-ketoglutarate dehydrogenase malate dehydrogenase succinate dehydrogenase isocitrate dehydrogenase isocitrate dehydrogenase succinate dehydrogenase α-ketoglutarate dehydrogenase malate dehydrogenase Which enzymes produce coenzyme A as a product? Select all that apply Which enzymes have an α-keto acid substrate? Select all that apply. citrate synthase fumarase succinyl-CoA synthetase citrate synthase α-ketoglutarate dehydrogenase fumarase malate dehydrogenase citrate synthase aconitase fumarase citrate synthase Select answer Which isomerization?
Which enzymes produce NADH as a product? Select all that apply.
α-ketoglutarate dehydrogenase
malate dehydrogenase
succinate dehydrogenase
isocitrate dehydrogenase
Which enzymes produce coenzyme A as a product? Select all that apply .
isocitrate dehydrogenase
succinate dehydrogenase
α-ketoglutarate dehydrogenase
malate dehydrogenase
Which enzymes produce coenzyme A as a product? Select all that apply
citrate synthase
fumarase
succinyl-CoA synthetase
citrate synthase
Which enzymes have an α-keto acid substrate? Select all that apply.
α-ketoglutarate dehydrogenase
fumarase
malate dehydrogenase
citrate synthase
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the brachial plexus gives rise to all of the following nerves, except the group of answer choices phrenic. ulnar. median. musculocutaneous. radial.
The brachial plexus gives rise to ulnar, median, musculocutaneous and radial nerves, except the phrenic muscles. Hence the phrenic nerve is not a branch of the brachial plexus.
The phrenic nerve is a nerve that originates in the neck and passes down through the chest to innervate the diaphragm. The diaphragm is a muscle that separates the chest cavity from the abdominal cavity and is responsible for helping us to breathe. The phrenic nerve is responsible for providing motor innervation to the diaphragm, which means that it helps to control the contraction of the diaphragm muscle. The phrenic nerve also provides sensory innervation to the diaphragm, which means that it helps us to feel when the diaphragm is contracting.
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when maxxam took over pacific lumber and began cutting down huge swaths of precious redwood forest, one of the justifications offered was--
One of the justifications offered was More jobs were produced by the increasing logging.
Maxxam Corporation purchased the redwood forest from Pacific Lumber in 1985. By claiming that more tree cutting would result in more jobs being available, Maxxam doubled the rate of redwood cutting.
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is not required for transcription. 1. a dna template 2. a primer 3. ribonucleoside triphosphate 4. rna polymerase 5. helicase
Primer is not required in transcription.
A DNA fragment is copied into RNA during transcription. Messenger RNA is created when specific DNA sequences are translated into RNA molecules that can encode proteins (mRNA). Non-coding RNAs are RNA molecules that contain copies of other DNA sequences (ncRNAs). Only 1% to 3% of all RNA samples are mRNA.
A minimum of 80% of mammalian genomic DNA can be actively transcribed (in one or more types of cells), with the bulk of this 80% being ncRNA. In contrast, less than 2% of the human genome can be transcribed into mRNA.
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What is the reflection of Buddhism?.
Buddhism is the religion put form of Buddha which states that a man can attain the path of enlightenment by destroying all the causes of sufferings like greed, hatred, or delusion.
Buddhism is considered to be one of the largest religion of the world. It is derived from the teachings of Buddha. It teaches humans to leave the sufferings of life and walk in the path of enlightenment. The religion is believed to be originated around 2500 years ago.
Enlightenment is also referred to as 'nirvana' in Buddhism. It is the stage where a person leaves the cycle of birth and rebirth. He/ She understands the true meaning of life and therefore gets an escape from the rebirth.
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from the following compounds involved in cellular respiration, choose those that are the net inputs and net outputs of glycolysis.
In a linear metabolic process involving enzyme-catalyzed reactions, known as glycolysis, glucose is converted into two molecules of pyruvate when oxygen is present or into two molecules of lactate when oxygen is not present.
Net Input: ADP, NAD⁺, Glucose
Net Output: ATP, NADH and Pyruvate,
not input or output: O₂, CO₂, coenzyme A and acetyl CoA
Anaerobic glycolysis, the latter route, is thought to be the first mechanism to have arisen in nature that produces adenosine triphosphate (ATP). In the majority of cells, glycolysis turns glucose into pyruvate, which mitochondrial enzymes then oxidize to produce carbon dioxide and water. However, due to the absence of mitochondria in some cells, most notably adult red blood cells, glycolysis serves as the only method of ATP synthesis. Glycolysis is the only method available to cells for converting glucose into ATP in the absence of oxygen. Lactic acidosis, a potentially fatal disease, is brought on by anaerobic glycolysis' excessive lactic acid generation. Numerous cancer cells have an incredibly high glycolytic enzyme capability. Cancer cells use glycolysis to make a large portion of their ATP even when oxygen is present.
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why did it turn out to be important that the researchers ran the legume nodule study for more than 10 days? group of answer choices
It turned out to be important that the researchers ran the legume nodule study for more than 10 days because In legume nodules, symbiosomes containing endosymbiotic rhizobial bacteria act as temporary plant organelles that are responsible for nitrogen fixation, these bacteria develop mutual metabolic dependence with the host legume.
What is nitrogen fixation?Nitrogen gas is transformed into a form that is useful to plants and other bacteria through the biological process of nitrogen fixation. This mechanism transforms atmospheric nitrogen gas into ammonia and other related nitrogenous chemicals.
Nitric oxide is fixed, or mixed, in nature as nitric oxide by lightning and UV light, although soil microorganisms fix a larger amount of nitrogen as ammonia, nitrites, and nitrates.
Why nitrogen fixation is important?Despite the fact that dry atmospheric air is 78% nitrogen, plants cannot immediately use this nitrogen, hence soil nitrogen fixation is crucial for agriculture. For a crop to be healthy, it must be available in a digestible form.
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Which terms accurately reflect the nature of replication of the chromosome in e. Coli?.
The chromosome replication process in E. coli is bidirectional and has a fixed point of initiation.
What is chromosome replication?When E. coli is growing rapidly, more time is needed for chromosome replication to finish than is available in between cell divisions. By starting rounds of chromosomal replication at intervals compatible with the cell replication rate, the organism avoids the potential issue of creating cells with fewer than one complete genome. Every time, initiation begins at the same location and travels in both directions to the terminus region. One effect of this is that cells in rapidly expanding populations have several active chromosome replication forks, and the largest cells have more than two copies of the entire genome in their chromosomes.
Although the exact mechanism governing the length of time between chromosomal replication rounds is unknown, numerous gene products are known to be crucial. The DNA protein, a DNA, ATP, and ADP-binding protein, has undergone the most research of all of them and appears to be crucial in the formation of the initiation complex. The reduction of certain genes' transcription when the replication fork goes through is another effect of the replication pattern. This results in synchronized cultures having apparent cell cycle-related gene regulation.
Therefore the term bidirectional and has a fixed point of initiation accurately reflect the nature of replication of the chromosome in e. Coli.
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