Answer:
Negative feedback is a vital control mechanism for the body's homeostasis. ... When body temperature drops, the hypothalamus initiates several physiological responses to increase heat production and conserve heat: Narrowing of surface blood vessels (vasoconstriction) decreases the flow of heat to the skin.
Weak hydrogen bonds between the nitrogenous base pairs hold the two strands of DNA together. Why are the strands held together by weak hydrogen bonds instead of covalent bonds
Answer:
Explanation:
Hydrogen bonding is usually occur wen interaction with hydrogen atoms occur.
Hydrogen bonds joins DNA polymers because an hydrogen atom occur on on one base which is called hydrogen bond donors and another oxygen or nitrogen atoms on the base across from it which is called hydrogen bond acceptors.
Adenine “A” a purine and Thymine “T” a pyrimidine each have a donor and one acceptor, whereas Cytosine “C” a pyrimidine has one donor and two acceptors, and Guanine “G” a purine has one acceptor and two donors.
This atoms allows for hydrogen bond between them that gives them structure of DNA molecule.
A nucleotides is hydrogen bonded to T nucleotides while C nucleotides is hydrogen bonded to G nucleotide this is called complementary base pairing.
Delia is teaching her sister about important molecules in the body.
She tells her sister that one molecule provides a set of instructions that determines traits, such as eyecolor or hair color. Which molecule is Delia describing?
Pls help !!
Answer:
answer is A
Explanation:
a population of 100 insects that live in an area 100 square meters has a density of 1 insect per square meter. what’s this an example of?
Plz help, instructions are in the pic. i’ll give brainless
Answer:
Reproduction: Involves mixing DNA (first box)
and the other two boxes are for growth and repair!!
Hope this helped:))
Answer: The first box goes into 'Reproduction', second and third go into 'Growth and repair'.
Good luck :)
10 points
One of Earth's characteristics is that it experiences seasons. Higher
temperatures result in summer and lower temperatures result in winter.
Why does the Earth experience seasons? *
A. Temperatures on Earth vary from one location to another, causing seasons.
B. Cloud cover is heavier in the winter, blocking radiation from the Sun and creating
seasons
C. As Earth revolves around the Sun, the hemisphere that is tilted toward the Sun
receives more direct sunlight, causing seasons
D. Earth's orbit around the Sun is elliptical, and Earth is farther from the Sun in winter,
resulting in seasons
Nas
Answer:
C.
Explanation:
earth's orbit around the sun is an elliptical orbit that requires about 365 1/4 days to complete. When Earth's axis points towards the sun it is summer to that hemisphere
Answer:c
Explanation:
What products of the Calvin Cycle are used by the light reactions?
Answer:
ATP and NADPH
Explanation:
The Calvin cycle uses the reducing powers ATP and NADPH from the light dependent reactions to produce sugars for the plant to use.
what 2 organisms are most closely related to eachother.....i need to know ASAP
Answer:
Family snapshot - chimps and humans are very closely related. Similarities are often easy to see when one looks at two organisms that evolved from a common ancestor, and until recently, looking at physical features and behavior was the only way to determine how closely related two organisms are.
How does the article "Caring for Vets Should Be National Duty," develop the central ideas that nonprofit organizations are helping veterans and that the government should take more responsibility for caring for veterans? By listing examples of nonprofit organizations and explaining how these organizations work with the government by explaining how the nonprofit organizations raise funds for veterans and describing how government programs are funded by explaining that one nonprofit has been helping veterans for over a decade and emphasizing that the government should be doing more by describing how services provided to veterans by nonprofit organizations differ from those provided by the government and stating the government services are inferior
Answer:
here you go this is just for confirmation
Explanation:
By explaining that one nonprofit has been helping veterans for over a decade and emphasizing that government should be doing more.
What are non-profit organizations?A non-profit organization is a group that was established with the intention of making a profit, and in which no part of the organization's revenue is given to its directors, officials, or members.
Donations, grants, and membership fees are how non-profit organizations make money. Additionally, they might make money by selling branded goods. Rent or mortgage payments are examples of costs incurred by non-profit organizations.
Examples of non-profit organizations are foundations, fraternal societies, civil leagues, social clubs, recreational clubs, charitable organizations, local employee associations, etc.
Learn more about non-profit organizations, here:
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what is the effect of glucagon?
A __ fault generally occurs at a transform boundary
Answer:
A strike-slip fault generally occurs at a transform boundary
how do you improve your mental health
Answer:
Talk about your feelings. Talking about your feelings can help you stay in good mental health and deal with times when you feel troubled.
Keep active.
Eat well.
Drink sensibly.
Keep in touch.
Ask for help.
Take a break.
Do something you're good at.
Explanation:
What is a Metamorphic Rock?
rock that forms when existing rock changes to a new rock because of heat and pressure
⊝
rock that forms by the process of compaction and cementation of sediments
⊝
rock that forms when melted rock (magma, lava) cools and hardens
⊝
pls help
Answer: A) rock that forms when existing rock changes to a new rock because of heat and pressure ..hope this helped!
Explanation:
Polygenic Inheritance is when traits are controlled by two or more genes. True False
Glycogen synthetase kinase 3 beta is a protein kinase that has been implicated in many types of cancer. Depending on the cell type, the gene for glycogen synthetase kinase 3 beta (GSK38) can act ether as an oncogene or as a tumor suppressor. Which of the following best predicts how GSK 98 mutations can lead to the development of cancer? A Cells with inactive GSK 38 fail to trigger apoptosis. B Cells with inactive GSK 38 fail to proceed past the G2/M checkpoint. с Cells with overactive GSK 98 are more likely to repair DNA damage. Cells with overactive GSK 38 have longer cell cycles.
Answer:
A Cells with inactive GSK 38 fail to trigger apoptosis
Explanation:
Apoptosis is defined as the process of programmed death cell. Tumor cells are capable of evading apoptosis, thereby leading to uncontrolled cell proliferation. Glycogen synthase kinase 3 (GSK-3) is a protein kinase that phosphorylates serine and threonine amino acid residues on different substrates, thus activating different signaling pathways and having different biological functions. The GSK-3-mediated phosphorylation on different substrates may lead to the activation or inactivation of apoptosis depending on the cell type. Thus, GSK-3 has a dual activity and functions as a tumor suppressor and oncoprotein.
help, please. this is for a friend to help me with.
Explanation:
I hope this helpppppppppppp
Answer:
14. To cause cancer, proto-oncogenes require 2 allele(s) to be mutated and therefore are considered recessive. The mutation results in a gain of function.
15. To cause cancer, tumor suppressor genes require 2 allele(s) to be mutated and therefore are recessive. The mutation results in a loss of function.
What statement is true about vines in the rainforest biome?
A) They grab onto several trees to gain access to sunlight.
B) They keep the structure of the canopy intact.
C) They can grow up to 3,000 ft long.
D) All of the above
PLS HELP ASAP
Answer:
D
Explanation:
Hope this helps you complete your question :)
Why does the body produce more urine on a cold day rather than a hot day if the same amount of
water is consumed?
Explanation:
During summer when the surrounding temperature is high, we lose water in the form of sweat, direct evaporation considerably. Hence kidneys retain water for maintaining fluidity of the blood and less urine is formed.
But during winter, the surrounding temperature will be very low. There will not be any sweating, no evaporation losses. Moreover to keep the body temperature constant, the blood capillaries in the skin get constricted and the blood pressure is increased. The result is that our body gets warmed up. In order to maintain the blood pressure normal, the excess water along with the wastes is excreted mostly in the form of urine. This is the reason for more urine out put and frequent urination under very cool conditions and in winter.
An earthquake occurs in which 'sphere?
Answer:it effects the biosphere and the hydroshere
Explanation: i learned this pls mark brainlist
Answer:
lithosphere
Explanation:
earthquakes are caused by shifts in the outer layers
hope that helps
Have a good day
The diagram models the collision of India with the Eurasian plate. Way crustal feature began forming 10 million years ago when India collided with the Eurasian plates?
Answer:a mountain range
Explanation: because when when they crashed it created a mountain range
Answer:
B
when they crashed it created a mountain range
The mass of a proton is the same as the mass of a neutron
True or false
Answer:
This statement is true.
Explanation:
Both protons and neutrons have a mass of one.
Hope this helps :)
Answer:
The proton and neutron have similar mass with the mass of the neutron slightly larger than that of the proton. Each of these particles has a mass approximately 1800 times greater than that of an electron. ... The atomic number of an element is equal to the number of protons in the nucleus of an atom of that element
In the example about the beaver's teeth, is it possible for just one beaver to evolve and get a favorable trait in its lifetime.
A. Yes because it makes sense it would need better teeth to cut down the tree
B. No because all traits are inherited and better teeth would have to come from those beavers with a trait for better teeth
C. Yes because animals control their traits.
Can someone please help
What are the advantages of asexual reproduction?
Answer:
No intercourse needed.
Explanation:
Answer:
The advantages of asexual reproduction include:
the population can increase rapidly when the conditions are favourable.
only one parent is needed.
it is more time and energy efficient as you don't need a mate.
it is faster than sexual reproduction.
Explanation:
Hope this helps u out!!
Give an example of how structure and function are related on the cellular level.
Answer:
Function and structure are related, because of a certain structure a living thing make contain makes the object function the way it does. ... The relationship of a structure and function is the structuring levels from molecules to organism ensure successful functioning in all living organism and living system
Explanation:
Moving ridges of water on the surface of the ocean caused by wind and constantly cause weathering along the shoreline. *
Answer:
Waves
Explanation:
Waves are moving bodies of water that crash against the shore and cause erosion.
What is a bacteria that is beneficial to humans and what does it do?
How will you react if I tell you that your body consists of 1 to 2.6 kg of bacteria? Shocked? Well, I can imagine your surprised face. Most people believe that bacteria are dangerous and are responsible for diseases and infections but this isn’t true. In fact the truth is, most of the bacteria are helpful in the functioning of a living body and are also capable of performing many other useful functions. These beneficial bacteria are present in huge numbers inside as well as outside our body. Well let’s check out various types of beneficial bacteria which not only help in proper functioning of our body but also contribute in many other functions in and outside the body. Some of the examples of helpful bacteria are Bifidobacterium, Rhizobium and E.coli.
Beneficial Bacteria – to Humans
Human body has millions of bacteria which participate in different functions of the body. As you know the amount of bacteria present in the body varies from 1 to 2.6 kg, this volume contains a huge number of bacteria. These bacteria can be present in all parts of the body but mostly they are found in the intestine where they help in the process of digestion. They also play a very important role in preventing bacterial infections in genital parts, like yeast infections. Some beneficial bacteria to humans are helpful in maintaining the pH of the body. Some are even involved in protecting the skin from many infections.
They are also helpful in the production of vitamin K and have an important role to play in the functioning of immune system. One of the most common bacteria which are helpful for humans is Escherichia coli. This bacteria is associated with the process of digestion. It is present in the large intestine where the maximum digestion takes place. These bacteria release enzymes which help in the process of digestion and synthesis of various vitamins and nutrients. Beneficial bacteria are also very helpful for the pregnant women. They reduce the chances of postpartum complications and also protects the baby from fungal infections.
Answer:
Probiotics are live bacteria that are good for us, that balance our good and bad intestinal bacteria, and that aid in digestion of food and help with digestive problems, such as diarrhea and bellyache. Bacteria that are examples of probiotics are Lactobacilli and Bifidobacterium.
A period in history in which human transitioned from human power, animal power and hand made goods to fissile fuel power, hydro/hydroelectric power and machine produced goods.
A. The industrial revolution
B. The agriculture revolution
C. The medical revolution
D. The American revolution
Please helppp
due soon!!
Which pair of structures would provide a positive identification of an animal cell under a microscope?
Answer:
lysosome, flagellum
Explanation:
Took the test & it was correct. See picture below.
what is something that could become an extra variable in an experiment if it is not managed properly.
A. Scientific theory
B. Scientific law
C. Constant
D. Control
Answer:
A. Scientific Theory
Explanation:
I can't breathe
A student is presented with a model of a digestive system and is asked to remove one structure (small or large organ) that will have the largest impact on decreasing chemical digestion. Which structure should the student remove
Answer:
Small intestine
Explanation:
Digestion is the process of breaking down food molecules into simpler and usable forms by the body cells. The process of digestion involved the mechanical aspect and chemical aspect. The mechanical one deals with using physical means like chewing to break down the food particles.
However, the chemical one deals with the usage of chemically-secreted enzymes to work on the food molecules. Lots of digestive organs are involved in this chemical digestion, but, the most of chemical digestion takes place in the SMALL INTESTINE. The small intestine is where most of the chemical digestion occurs including absorption.
Hence, according to this question, the student should remove the SMALL INTESTINE because it will have the largest impact on decreasing chemical digestion.
