Answer:
Telomere
Explanation:
The correct answer would be telomere hypothesis.
The telomere hypothesis is the main hypothesis that links aging, otherwise known as senescence, to the shortening of telomeres. Telomeres are short DNA nucleotides found at the end of each chromosome of humans.
The hypothesis postulates that loss of telomeres in the vegetative cells of the body is primarily responsible for cell aging or senescence.
Hence, the correct answer would be the telomere hypothesis.
During intense exercise, the muscle cells require constant supply of ATPs but the supply of oxygen is low. In that case - the muscle cells of the person will switch from which to which pathway?
Answer:
Aerobic to lactic acid fermentation pathway
Explanation:
ATP, which is the usable form of energy in living cells, is obtained via a process called RESPIRATION. However, aerobic respiration requires a constant supply of oxygen to occur. Hence, during an intense exercise where the supply of oxygen is low, the muscle cell has to switch from the respiration pathway that requires oxygen to one that doesn't.
Fermentation is a kind of cellular respiration that does not require oxygen to occur. In the muscle cells of animals (humans inclusive), lactic acid is the product of the fermentation process, hence, it is called LACTIC ACID FERMENTATION. This means that the muscle cells, in a low supply of oxygen, will switch from AEROBIC to LACTIC ACID fermentation pathway.
Mendel chose pea plant (Pisum sativum) for his experiment. Write the reasons:
Answer:
Mendel choose pea plant (Pisum sativum) for his experiment due to following reasons:
(i) availability of contrasting traits of several characters.
(ii) Their life span is short.
(iii) Normally self-pollination occurs but cross-pollination can also be done by artificial means.
(iv) Large no of seeds produced.
Mendel choose pea plants for his experiments because of the following reasons:
(i) The flowers of this plant are bisexual.
(ii) They are self-pollinating, and thus, self and cross-pollination can easily be performed.
(iii) The different physical characteristics were easy to recognize and study.
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protein
Explanation:
beacause its ah. cd
Which organism in the food web below is found in the first trophic level of the
ecosystem?
A. Fungus
B. Strangler fig
C. Fruit bat
D. Sloth
Fungus is the organism in the food web displayed in the image in the first trophic level of the ecosystem.
What is trophic level?Trophic level is defined as the position of an organism in the food chain or food web.
The trophic level consists of organisms at different levels. The first trophic level is made up of producers that initiate the transfer of energy.
According to this question, an image showing a food web is given. The first trophic level in this food web is the fungus because it starts the energy transfer.
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Please I urgently need help with this
Answer:
A - Stigma
B - Anther
C - Filament
D - Style
E - Ovary
F - Petal
Explanation:
The above are the correct answers of the image drawn in the attachment.
These are parts of a flower.
A - Stigma: It is the head of the pistil. It contains a sticky substance that catches pollen grains from other pollinators.
B - Anther: This is the head of the stamen. It produces pollen grain.
C - Filament: It is a long slender part of the flower. It attaches the anther to the flower.
D - Style: It actually holds the stigma.
E - Ovary: It holds the ovule. Found at the base of the pistil.
F - Petal: It attracts pollinators to the flower.
Which of the following adaptations would you expect to find in an animal in the taiga biome, but not in the alpine? a. hibernation b. migration C. large lungs d. large paws
You would expect to find C. Large Paws in the taiga biome, but not in the alpine.
Answer:
D- Large pawls
Explanation:
edg
Which is an example of why the process of photosynthesis is important to life on Earth?
Grass uses photosynthesis to produce glucose, which is used within the grass for growth.
Fungi use photosynthesis to decompose dead and decaying plant matter.
Ectothermic animals use photosynthesis to convert sunlight into energy for cell functions.
Green plants use photosynthesis to remove oxygen gas from the atmosphere and replenish the earth’s carbon dioxide.
True or False- The thermosphere contains no water vapor.
Answer:
True
Explanation:
The temperature can rise as high as 1500 C, the gas molecules are very far apart. This layer is completely cloudless and free of water vapour
What term is used to describe decay that happens in the presence of oxygen?
Answer:
Aerobic Decomposition. When organic materials decompose in the presence of oxygen, the process is called “aerobic.” The aerobic process is most common in nature
Select all that apply Select all true statements about the Glomeromycota. Multiple select question. They are plant pathogens and parasites. They do not undergo sexual reproduction. They lack nuclei. They form arbuscular mycorrhizae.
Answer:
They do not undergo sexual reproduction.
They form arbuscular mycorrhizae.
Explanation:
Glomeromycota form arbuscular mycorrhizae and they do not undergo sexual reproduction.
Glomeromycota is one of the divisions of fungi that can be found in soils where they form symbioses(association where both glomeromycota and the plant benefits) with the roots of the plants. They can also be found in wetlands. An example of glomeromycota is Acaulospora.
They are also called mycorrhiza. They reproduce through asexual reproduction.
which organsism transform nitrogen to a form this useful to plants? a. bacteria b.animals c.fungi d.humans
Answer:
a. bacteria
Explanation:
There are nitrogen-fixing bacteria whose sole purpose is to transform nitrogen into a form which can be used by our friends called the plants.
Answer:
A. Bacteria
Explanation:
Nitrogen-fixing bacteria are capable of transforming it into fixed-nitrogen particles, that are usable by plants
define the photosynthesis?
Answer:
PHOTOSYNTHESIS is a process in which green plants and other certain organisms convert water, carbon dioxide and other minerals into energy rich molecules and oxygen using the light energy.
hope it helps
have a nice day
Answer:
Photosynthesis is a process through which plants and other organisms transform light energy into chemical energy, which is then released to power the organism's activities through cellular respiration.
What is produced/made when our food is burned?
___+___+___
Answer:
it should be ( carbon dioxide, oxygen, and energy
Explanation:
Explanation:
Oxygen /carbon dioxide and energy
This is the process happens continuously inside our body .This is called respirationIf a stimulus to a neuron is great enough, ________ is reached and an action potential is generated.
Answer:
If a stimulus to a neuron is great enough, ___threshold_____ is reached and an action potential is generated.
Answer:
Threshold
Explanation:
This happens when the stimulus is just strong enough to evoke a response.
Hopefully, this helped. If I am incorrect feel free to correct me. :)
Brian is attempting to determine whether it makes sense to think that the human need to belong and to establish relationships has an evolutionary basis. Based on the principles of natural selection, Brian knows he could support this idea if there was evidence that
Answer:
I DIDNT UNDER STAND
Explanation:
SORRY
A computational biologist develops a computationally intensive program for DNA sequence alignment. When they use distributed computing techniques to run the program on four computers in parallel, they find a speedup of 4. In this case, what does a speedup of 4 indicate
Answer: The program completed in a quarter of the time with four computers versus one computer
Explanation:
Distributed computing simply means using distributed systems in solving computational problems and this is done as the problem is divided into many tasks, whereby the tasks are accomplished by one or more computers.
Following the information given in the question, a speedup of 4 indicate that the program completed in a quarter of the time with four computers versus one computer.
The cells of collenchyma have evenly thickened cell wall true or false?
Answer:
False
Explanation:
The cells of collenchyma have evenly thickened cell wall
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False.. The cells of sclerenchyma have evenly thickened cell wall due to deposition of lignin.. Collenchyma cells are thickened at the corner due to pectin..
What about cellulose makes it ideal for structural support?
Answer:The answer would be D!
Explanation:
A hydrogen bond is one of the strongest molecular bonds. :)
(06.01 MC)
When Linnaeus began classifying organisms in the 1700s, he categorized them as plant, animal, or mineral. These kingdoms were later revised to exclude minerals and expanded to include animals, plants, fungi, protists, and bacteria. Which of the following best explains a reason for this change? (2 points)
Group of answer choices
As new organisms were discovered, new kingdoms were created to sort them based on ability to interbreed.
It was discovered that the organisms in each of the five kingdoms have a different method of obtaining nutrients and are therefore fundamentally different.
Technological advances led to the discovery of single-celled organisms and increased our understanding of relationships between organisms.
Genetic research led to the discovery that each of these five kingdoms has a unique evolutionary ancestor.
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what is a skeleton and give two characteristics of a mammal
A skeleton is a structural frame that supports an animal body.
The skeletal system of mammals and other vertebrates is broadly divisible functionally into axial and appendicular portions.
There are two major types of skeletons: solid and fluid. Solid skeletons can be internal, called an endoskeleton, or external, called an exoskeleton, and may be further classified as pliant (elastic/movable) or rigid (hard/non-movable).
Fluid skeletons are always internal.
The presence of hair or fur.
A four-chambered heart.
Answer: well I know the skeleton is the bone structure in some living organisms if there a vertebrate
Inside a skeletal muscle cell, a set of small cylinders called _______ are assembled into larger cylinders called _______.
Answer:
Myofibrils
Intercalated disc
Explanation:
Myofibrils in a skeletal muscle cell are a set of cylinders which are repeated form of sacromeres.
Intercalated discs are assembled into larger cylinders and are involved in cell to cell communications, they link cells to get her and transmit electrical impulses within the sacrolemma
Asexual reproduction differs from sexual reproduction in that Group of answer choices asexual reproduction utilizes DNA from two parents to code for traits in offspring. asexual reproduction occurs only in plants. asexual reproduction produces offspring containing DNA from only one parent. asexual reproduction only occurs in animals. asexual reproduction produces genetically diverse offspring.
Answer:
Asexual reproduction produces offspring containing DNA from only one parent.
Explanation:
Asexual reproduction produces offspring containing DNA from only one parent because in asexual reproduction, the organisms born or produced from a single parent. The offspring is identical to their parent and this process of asexual reproduction occurs in both plants and animals. Asexual reproduction produces identical not genetically diverse offspring in the end of the process.
Answer:
Because asexual reproduction results in the birth or creation of organisms from a single parent, the children created have DNA from just one parent. Both plants and animals can reproduce asexually, and the progeny are identical to their parents. Asexual reproduction ultimately results in identical, not genetically different, offspring.
Explanation:
edg 2022
Which process is responsible for causing menstruation
Explanation:
the process in a woman of discharging (through the vagina) blood and other materials from the lining of the uterus at about one monthly interval from puberty until menopause (ceasing of regular menstrual cycles).
Which pedigree symbol is used to represent a female carrier of a recessive X-linked trait?
Answer:
A half-shaded square.
Explanation:
Squares represent females, and since she is a carrier, the square is half-shaded, if it was fully shaded, she would be affected.
Answer:
Half-Circle
Explanation:
When Adenosine Triphosphate is used, it breaks down into:
A. Glucose
B. It doesn't break down
C. Thymine Triphosphate
D. Adenosine Diphosphate
Answer:
D. Adenosine DIPHOSPHATE
Explanation:
ATP is hydrolysed to ADP in the reaction ATP+H20->ADP +Pi + energy
When Adenosine Triphosphate is used, it breaks down into Adenosine Diphosphate.
Adenosine diphosphate (ADP)
Adenosine diphosphate (ADP), also known as adenosine pyrophosphate (APP), is an important organic compound in metabolism and is essential to the flow of energy in living cells. ADP consists of three important structural components: a sugar backbone attached to adenine and two phosphate groups bonded to the 5 carbon atoms of ribose. The diphosphate group of ADP is attached to the 5’ carbon of the sugar backbone, while the adenine attaches to the 1’ carbon.
ADP can be interconverted to adenosine triphosphate (ATP) and adenosine monophosphate (AMP). ATP contains one more phosphate group than does ADP. AMP contains one fewer phosphate group. Energy transfer used by all living things is a result of the dephosphorylation of ATP by enzymes known as ATPases. The cleavage of a phosphate group from ATP results in the coupling of energy to metabolic reactions and is a by-product of ADP.ATP is continually reformed from lower-energy species ADP and AMP. The biosynthesis of ATP is achieved throughout processes such as substrate-level phosphorylation, oxidative phosphorylation, and photophosphorylation, all of which facilitate the addition of a phosphate group to ADP.
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which type of gas or gasses are ressponsible for the start of life on earth
Answer:
Before life began on the planet, Earth's atmosphere was largely made up of nitrogen and carbon dioxide gases. After photosynthesizing organisms multiplied on Earth's surface and in the oceans, much of the carbon dioxide was replaced with oxygen.
Explanation:
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Describe the thickness of the uterus lining during
menstruation process.
Answer:
As the cycle progresses and moves towards ovulation, the endometrium grows thicker, up to about 11 mm. About 14 days into a person's cycle, hormones trigger the release of an egg. During this secretory phase, endometrial thickness is at its greatest and can reach 16 mm.
Explanation:
Answer:
During this timeframe, the uterus is in the proliferative phase. Estrogen induces growth of the functional layer of the endometrial lining, which enables it to grow from about 1-3 mm post cycle to 6-8 mm approximately. Days 12-16 of the menstrual cycle At this point, the endometrial layer is about 6-8 mm thick.
Explanation:
help me ..it's a MCQ
Explanation:
I think your answer is D, and let me explain why.
Heat can denature proteins quickly because proteins have very specific temperatures at which they act best. If the temperature rises too high/falls too low with respect to that threshold, then that will cause the proteins to stop working properly and eventually die.
pH is also very important with how proteins work, and it's the same reason as heat. Proteins have a certain range of pH's that keep them healthy and working, but as soon as the pH changes dramatically outside of that range, the proteins will be quickly denatured.
And lastly, organic solvents can denature proteins as well (e.g. alcohol), which makes sense because they are solvents (a solvent is something that dissolves other substances). I'm not sure about the exact chemistry / biological responses behind it, but it's what would be expected of a solvent.
With all of this in mind, I think your answer should be D!
One student made the incomplete diagram shown below to represent the relationship between magma igneous rocks and metamorphic rocks.
Which of these is the correct next step to complete the diagram?
A. Put an arrow labeled cools and crystallizes pointing from igneous rocks to metamorphic rocks
B. Put an arrow labeled cools and crystallizes pointing for metamorphic rocks to igneous rocks
C. Put an arrow labeled heat and pressure points in from igneous rocks to metamorphic rocks
D. Put an arrow labeled heat and pressure pointing from metamorphic rocks to igneous rocks
Answer:
C. Put an arrow labeled heat and pressure pointing from igneous rocks to metamorphic rocks
Explanation:
Metamorphic rocks are changed rocks that are formed from pre-existing rocks that were once sedimentary or igneous rocks. Heat and pressure majorly act on igneous rock, which over time change these rocks into a different rock entirely, known as metamorphic rocks.
Therefore, the next step to complete the diagram will be:
"C. Put an arrow labeled heat and pressure pointing from igneous rocks to metamorphic rocks."
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Answer:
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