the federal government
Which of the following DNA mutations is likely to have the most negative effect on the protein it specifies?
A.) A codon deletion at the end of a sequence
B.) A base pair deletion, resulting in a different amino acid
C.) A substitution for one serine codon for a different serine codon
D.) A substitution for one stop codon for another stop codon
Answer:
B.) A base pair deletion, resulting in a different amino acid
Explanation:
A base-pair deletion mutation is likely to have the MOST NEGATIVE effect on the protein it specifies (Option B).
A mutation is any alteration in the nucleotide sequence (DNA) of an organism.A base-pair deletion will change the Open reading frame (ORF) of the protein that is synthesized from a given gene sequence, thereby changing all aminoacids downstream the mutation.In consequence, a base-pair deletion can significantly alter the protein that will be synthesized from a given gene.Moreover, a substitution for a one-stop signal for another stop codon is neutral because it doesn't affect the resulting protein.In conclusion, a base-pair deletion mutation is likely to have the MOST NEGATIVE effect on the protein it specifies (Option B).
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Which of the following represents ways nitrogen can enter the soil?
I. Photosynthesis
II. Sunlight
III. Rainfall
III only
I and II
I and III
I, II, and III
the answer is I and III
The correct process that represents ways nitrogen can enter the soil is III only which is rainfall.
Atmospheric nitrogen can not be used by most organisms due to fact that the three covalent bonds present in atmospheric nitrogen are very hard to break.
Nitrogen fixation takes place either:
By the microbes and produce ammonia by biological nitrogen fixation. or, Rainstorms, natural lighting, rainfall contribute to atmospheric nitrogen into nitrates through raindrops that reach the soil.Nitrates are the most bio-available form of nitrogen.Thus, the correct answer is - III only which is rainfall.
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HELP ME WITH THIS!!!
Answer:
As the temperature increases, more and more sugar can be dissolved, but only slightly more salt can be dissolved. How much sugar dissolves in 100 mL of water at 50 °C? About 260 g of sugar will dissolve.
Animal cells have which of the following characteristics? Select all that apply.
cleavage furrows
chloroplasts
no cell wall
cell plates and no centrioles in cell division
no large vacuole, only small ones
Answer:
Animal Cell Structure
Animal cells are typical of the eukaryotic cell, enclosed by a plasma membrane and containing a membrane-bound nucleus and organelles. Unlike the eukaryotic cells of plants and fungi, animal cells do not have a cell wall. This feature was lost in the distant past by the single-celled organisms that gave rise to the kingdom Animalia. Most cells, both animal and plant, range in size between 1 and 100 micrometers and are thus visible only with the aid of a microscope.
Anatomy of the Animal Cell
The lack of a rigid cell wall allowed animals to develop a greater diversity of cell types, tissues, and organs. Specialized cells that formed nerves and muscles—tissues impossible for plants to evolve—gave these organisms mobility. The ability to move about by the use of specialized muscle tissues is a hallmark of the animal world, though a few animals, primarily sponges, do not possess differentiated tissues. Notably, protozoans locomote, but it is only via nonmuscular means, in effect, using cilia, flagella, and pseudopodia.
The animal kingdom is unique among eukaryotic organisms because most animal tissues are bound together in an extracellular matrix by a triple helix of protein known as collagen. Plant and fungal cells are bound together in tissues or aggregations by other molecules, such as pectin. The fact that no other organisms utilize collagen in this manner is one of the indications that all animals arose from a common unicellular ancestor. Bones, shells, spicules, and other hardened structures are formed when the collagen-containing extracellular matrix between animal cells becomes calcified.
Animals are a large and incredibly diverse group of organisms. Making up about three-quarters of the species on Earth, they run the gamut from corals and jellyfish to ants, whales, elephants, and, of course, humans. Being mobile has given animals, which are capable of sensing and responding to their environment, the flexibility to adopt many different modes of feeding, defense, and reproduction. Unlike plants, however, animals are unable to manufacture their own food, and therefore, are always directly or indirectly dependent on plant life.
Most animal cells are diploid, meaning that their chromosomes exist in homologous pairs. Different chromosomal ploidies are also, however, known to occasionally occur. The proliferation of animal cells occurs in a variety of ways. In instances of sexual reproduction, the cellular process of meiosis is first necessary so that haploid daughter cells, or gametes, can be produced. Two haploid cells then fuse to form a diploid zygote, which develops into a new organism as its cells divide and multiply.
The earliest fossil evidence of animals dates from the Vendian Period (650 to 544 million years ago), with coelenterate-type creatures that left traces of their soft bodies in shallow-water sediments. The first mass extinction ended that period, but during the Cambrian Period which followed, an explosion of new forms began the evolutionary radiation that produced most of the major groups, or phyla, known today. Vertebrates (animals with backbones) are not known to have occurred until the early Ordovician Period (505 to 438 million years ago).
Fluorescence Microscopy of Cells in Culture
Cells were discovered in 1665 by British scientist Robert Hooke who first observed them in his crude (by today's standards) seventeenth century optical microscope. In fact, Hooke coined the term "cell", in a biological context, when he described the microscopic structure of cork like a tiny, bare room or monk's cell. Illustrated in Figure 2 are a pair of fibroblast deer skin cells that have been labeled with fluorescent probes and photographed in the microscope to reveal their internal structure. The nuclei are stained with a red probe, while the Golgi apparatus and microfilament actin network are stained green and blue, respectively. The microscope has been a fundamental tool in the field of cell biology and is often used to observe living cells in culture. Use the links below to obtain more detailed information about the various components that are found in animal cells.
What holds a moon in its orbit?
A. the heat generated by the planet it orbits
B. the gravitational pull of the planet it orbits
C. its own internal magnetism
D. the gravitational pull of the star it orbits
Rese
Answer:
I think its B the answer. since earth pulls it gravitationally towards us
Answer:
Yes option ( B ) is right answer
due to gravitational pull of the planet it orbits
What process do autotrophs undergo to create
their own food?
A. cellular respiration
B. photosynthesis
Which of the following represents the impacts of drilling and fracking on human health?
I. Heavy metal exposure can cause nervous system damage.
II. Air pollution can aggravate respiratory conditions.
III. Noise pollution can cause headaches, changes in sleep patterns, and anxiety.
- III only
- I and II
- II and III
- I, II, and III
Answer:
II and III
Explanation:
I only applies to mining and not drilling.
The correct answer as to the impacts of drilling and fracking on human health includes nervous system damage as a result of heavy metal exposure, respiratory diseases as a result of air pollution, and headaches, changes to sleep patterns, etc. as a result of noise pollution. The correct answer would therefore be I, II, and III.
Drilling and fracking are innovative technology methods used in the location of water, minerals, and the extraction of crude oil from underground respectively. The methods are characterized by the noise of the drilling machine, air pollution by dust particles as a result of soil excavation, and heavy metal pollution of the environment.The different pollutions have varying degrees of effects on the health of human and these include damages to the nervous system by heavy metal, damages to the respiratory organs as a result of inhalation of particulate matters and headaches/anxiety as a result of noise pollution.Hence, all the three effects represent the impact of drilling and fracking on human health.
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Question and hypothesis worksheets
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Which of the following statements is true about chemical elements in an ecosystem?
View Available Hint(s)
O They exit the ecosystem in the form of heat.
O They recycle within the ecosystem, being constantly reused.
O They flow through the system, losing some heat in the process.
o They depend on sunlight as their source.
O They cannot be obtained from decomposition.
They are recycle within the ecosystem being constantly reused ( B ) is the true statement
The energy from the sun is use in the formation of nutrients in plants that is consumed by the primary consumers ( Herbivores ) in the ecosystem, while the primary consumers will be consumed by the secondary consumers ( carnivores ). these waste product from the secondary consumers is decomposed by the tertiary consumers ( Fungi and bacteria ) to be reused by the Plants again.
Hence we can conclude that the true statement about the chemical elements in the eco system is that they recycle within the ecosystem being constantly reused.
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blood
11. Where does enzymatic hydrolysis of food happen in the body?
A. Mouth
B. Stomach
B. Large intestine
C. Small intestine
Answer:
hi
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Explanation:
in
the
stomach
observation between crumbled paper and flat paper
Answer:
One have kinks and fold everywhere while one has none it is perfectly flat.
Explanation:
you can ever get one back like the orignal (like the flat paper)
This study stresses the importance of lifestyle adaptations in primary as well as secondary prevention of non-communicable diseases. Which of the following are modifiable lifestyle behaviors that could impact health?
A. Reducing sodium Intake to 2400 miligrams per day
B. Uimiting intoke of monunsaturated fats.
C. Obtaining a minimum of 150 minutes of vigorous exercise daily
D. Aiming to eat at least 5 servings of fruits and vegetablos daily
The modifiable lifestyle that could have a more positive impact on health in the prevention of non-communicable diseases are:
A. Reducing sodium Intake to 2400 miligrams per day
B. Limiting intake of monunsaturated fats.
D. Aiming to eat at least 5 servings of fruits and vegetablos daily
Noncommunicable diseases are highly preventable and are mostly triggered by inadequate diet, sedentary lifestyle, consumption of high-calorie beverages, foods of low nutritional value, and high intake of tobacco and alcohol.
A. Reducing sodium Intake to 2400 miligrams per day
Consuming excess sodium can affect from the fluid balance to our metabolism and thus, lead to different diseases.
It can trigger arterial hypertension and associated cardiovascular problems due to its vasoconstrictive effect and on fluid retention.
The World Health Organization recommends not exceeding 2 grams of sodium per day or, what is the same, limiting the consumption of salt to a maximum of 5 grams daily.
B. Limiting intake of monunsaturated fats.
Among the many benefits of Monounsaturated fats we find:
1) Decreased cardiovascular risk
2) Improved insulin sensitivity
3) Reduction of inflammation
D. Aiming to eat at least 5 servings of fruits and vegetables daily
Consuming, on a regular basis, at least 5 servings of fruits and vegetables a day, constitutes one of the bases of healthy eating, providing the body with all kinds of valuable nutrients for the fulfillment of different processes.
Their consumption helps prevent various diseases as they are high in fiber, vitamins, minerals, water and antioxidant substances, do not contain cholesterol and provide few calories.
On the other hand, World Health Organization offers guidance on the intensity of the types of activities and exercises.
Adults should spend a minimum of 150 minutes a week engaging in moderate physical activities this stimulates the immune system.
Therefore, we can conclude that modifiable lifestyle have a direct impact on people's health in the prevention of non-communicable diseases and quality of life.
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Define the roles of observations and hypothesis in science
The roles of observations and hypothesis in science are:
observation: experiencing the nature or world working by senses.Hypothesis- a tentative guess about how the world works based on observationObservation and hypothesis are the steps of the scientific method used to test and acquire knowledge.
Observation is observing or experiencing the world working by eyes and check what changes occurred.Hypothesis on other hand is a suggestive explanation that is based on previous experiments or knowledge or observational results so it can be tested by experimentation.Thus, the correct answer is -
observation: experiencing the nature or world working by senses.Hypothesis- a tentative guess about how the world works based on observationLearn more about the scientific method:
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5. In an experiment, what is used to compare to the experimental group that you are testing?
a Independent variable
b. Qualitative
C. Dependent variable
d. Control group
Which word describes a statement that is based on thoughts and ideas not experiments?
law
hypothesis
theory
data
The answer is hypothesis!
The word describes a statement that is based on thoughts and ideas not experiments is hypothesis. The correct option is B.
What is hypothesis?A "hypothesis" is a term that is frequently used in science. Depending on the context, the word can have many different meanings: A scientific hypothesis is a suggestion for a solution based on evidence.
A hypothesis is an explanation proposed for a phenomenon. The scientific method usually needed a hypothesis to be testable in order for it to be considered a scientific hypothesis.
It aids in providing a link between the underlying theory and the specific research question.
It aids in data analysis and assesses the research's validity and reliability. It serves as either a basis or proof of the research's validity.
Thus, the correct option is B.
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The amino acid serine is coded by the mRNA codon AGU. What is the base sequence of the DNA gene that originally produced this mRNA codon?
TCA
TCC
AGU
UCA
A codon is a triplet of nucleotides synthesized from the complementary DNA strand. The base sequence of the DNA gene that originally produced the AGU mRNA codon is TCA.
During transcription, a fragment of DNA (e.g., a gene) is used as a template to synthesize a complementary RNA sequence, usually a messenger RNA (mRNA) sequence.Subsequently, this mRNA sequence is then used as a template to create a polypeptide chain by a process known as translation.According to the base pair rules, Adenine pairs with Thymine, whereas Guanine pairs with Cytosine.In RNA, Thymine bases are replaced by Uracil bases.In conclusion, the base sequence of the DNA gene that originally produced the AGU mRNA codon is TCA.
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Which of these characteristics is shared by all living things?
They make their own chemical energy.
They grow and develop when one cell divides into two.
They are made up of one or more cells.
They have similar responses to light.
Answer:
They have similar responses to light
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Each distinct form of life or type or organism is called a
Answer: Archaebacteria
Explanation:
Each distinct form of life or type or organism is called a species.
What are species?
The biological species are defined as a group of living organisms having similar habits as well as individuals able to exchange genes or interbreeding.
The species are divided on the principle of nature as well as taxonomic unit,starting from taxonomic unit , and ranking below genus. Species are represented by a Latin binomial, e.g. Homo sapiens, Magnifera Indica etc.
A group of living things, plants, or animals sharing common character and appearance comes in the category of a particular species and there are species such as Felis catus, Gallus gallus, Pan troglodytes, Vicugna pacos etc.
Therefore,each distinct form of life or type or organism is called a species.
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The continuous processes that cause rocks to change from one type to another is known as the ______.
Answer:
The three processes that change one rock to another are crystallization, metamorphism, and erosion and sedimentation. Any rock can transform into any other rock by passing through one or more of these processes. This creates the rock cycle.
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The continuous processes that cause rocks to change from one type to
another is referred to as rock cycle.
Rock cycle explains the different processes which occurs in the change of
rocks from one form to another. Rock cycle involves processes such as
erosion, sedimentation, metamorphism etc.
The different types of rocks such as igneous,sedimentary and metamorphic
change to different forms and types through the processes that occurs in the
rock cycle.
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The cause of a change in an organism environment that affects the activity of an organism
Answer:
Ecological Niche. The functional role of an organism or a species in the ecosystem, including its relationships with other species. ecology. The study of the distribution, abundance, and interrelationships of organisms and their interactions with the environment. Ecosystem
Explanation:
PLEASE COMMENT THE ANSWER MY BRAINLY IS ACTING UP AND WONT LOAD THE VIDS In the 1950s, biologists started creating varieties of food crops that increased yields. At around the same time, chemists were creating new pesticides and fertilizers to protect and enhance the growth of crops. This combination led to growing larger amounts of food on less land and has been called the green revolution. One of the main effects of this has been a reduction in the cost of food products. Select the statement(s) that describe science impacts.
A. influenced politics because the relative cost of food products went down.
B. influenced economics because the relative cost of food products went down.
C. was influenced by economics because the relative cost of food products went down.
Answer:
C
Explanation:
What does a scientist do in order to test a hypothesis?
Answer:
Scientists then test hypotheses by conducting experiments or studies. ... The purpose of an experiment is to determine whether observations agree with or conflict with the expectations deduced from a hypothesis.
Explanation:
The endosymbiotic theory hypothesizes that mitochondria formed from prokaryotic cells. What evidence supports the hypothesis?
They are autotrophic and have parasitic relationships.
They have linear DNA similar to bacteria.
They have chromosomes and ribosomes that are similar to prokaryotes.
They have flagella similar to prokaryotes.
The evidence that supports the endosymbiotic theory is mitochondria have chromosomes and ribosomes that are similar to prokaryotes.
Some lines of evidence that supports the endosymbiotic theory include:
Mitochondria are organelles that have their own DNA known as mitochondrial DNA (mtDNA).Mitochondria have their own ribosomes which are capable of synthesizing their own proteins.Mitochondrial ribosomes are more closely (evolutionary) related to bacterial ribosomes rather than eucaryotic ribosomes.Mitochondria also have their own cell membranes.In conclusion, the evidence that supports the endosymbiotic theory is mitochondria have chromosomes and ribosomes that are similar to prokaryotes.
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Where is Saturn located within our solar system?
O Between the Asteroid Belt and Jupiter
O Between Earth and Mars.
O Between Jupiter and Uranus.
O Between Uranus and Neptune.
Which of the following TAS1R2 gene mutations is most likely to affect a person's ability
to taste molecules that are sweet?
The TAS1R2 gene mutations that affects a person's ability to taste molecules that are sweet are :
VV h0m0zygotes , VI heterozygotes, II h0m0zygotesAlthough the options related to your question is missing a general answer is provided. above
The TAS1R2 gene is a sweet receptor and the variations in this gene affects the dietary intake of sugary foods in individuals and the level at which they perceive sweetness.
And the variations show that VV h0m0zygote individuals will consume less amount of calories from sugary foods than individuals whom are either VI heterozygotes or II h0m0zygotes.
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Which person would more likely be a candidate for a surgery? Middle ear damage or inner ear damage?
Explanation:
candidate 4 inner ear surgery = inner ear
because inner ear is what helps you hear sound, more so than outer ear.
outer ear= ( like a speaker to capture sound).
inner ear = complex structures & bones to help process sound to brain...
depending on circumstances, drs may let each structure heal b4 next surgery, takes 6 wks
or more 2 heal if all goes as planned.
shud take a year 2 complete healing. meaning ; drainage tubes have 2 b inserted for drainage of infectious substances.
start with inner 1st then outward. protecting inner structures..
Which cell did shyam observed under the microscope *
Prokaryotic cell
Animal Cell
Plant cell
Egg cell
Answer:
Plant cell
Explanation:
Onion, so ofc plant cell
Which of the following is the best example of potential energy?
A bird making a nest
B car stopped at the top of a hill
C gymnast doing a cartwheel
D swimmer doing the backstroke
Answer:
A car stopped at the top of a hill is the answer
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Explanation:
Explainhow carbon moves thoughout an ecosystem.
Answer:
Hi, Friend!
Carbon moves through Earth’s ecosystems in a cycle referred to as the carbon cycle. It is through carbon dioxide gas found in Earth’s atmosphere that carbon enters the living parts of an ecosystem.
Explanation:
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The water cycle summarizes the processes that take place when water moves through the hydrosphere. The water cycle is shown here:
Explanation:
water moves through the hydrosphere in a cycle. Water collects in clouds, then falls to Earth in the form of rain or snow. This water collects in rivers, lakes and oceans. Then it evaporates into the atmosphere to start the cycle all over again
