Answer:
A
Explanation:
The roots will grow downwards tend support gravitropism
The receptor of sound waves in the ear is the
O a. pinna.
O
b. ossides.
O c. organ of Corti.
O d. tympanic membrane.
The behavior of allosteric enzymes a. does not play any role in feedback inhibition in metabolic pathways b. is strongly dependent on the presence of metal ions c. is related to their ability to hydrolyze themselves d. depends on changes in their quaternary structure on binding of substrates or inhibitors
Answer:
The correct answer is d
Explanation:
Allosteric enzymes have multiple binding sites to different ligands called allosteric sites (different from the active site), these ligands can modify their kinetic properties. They are generally made up of more than one polypeptide chain, and have a quaternary structure, an enzyme with a quaternary structure can bind more than one substrate molecule. An allosteric enzyme is an enzyme whose activity is regulated by an allosteric center, which is a site, other than the active center of the enzyme, to which a regulator (called an allosteric regulator) binds in a reversible and non-covalent manner. The binding of this regulator modifies the three-dimensional structure of the enzyme and affects the configuration of the active site, thus increasing or decreasing its activity, depending on the case. The allosteric sites present in regulatory enzymes is where allosteric effectors or inhibitors are attached, causing a conformational change in the substrate binding site or catalytic site, thus regulating enzyme activity.
Answer:
d. depends on changes in their quaternary structure on binding of substrates or inhibitors
Explanation:
Allosteric enzymes are oligomeric proteins composed of subunits or polypeptidic chains. They have a quaternary structure -many subunits and active sites- and express two states, R and T. Both states establish an equilibrium, with or without a joint ligand.
When the transition from one state to the other occurs, symmetry is conserved, but the affinity of a site to a ligand is altered. When a substrate joins one of the sites, it affects other binding sites.
Allosteric enzymes can change their conformation, exhibiting active and inactive conformations as a result of substrate binding at the activated center and regulatory molecules at other binding sites -allosteric centers-.
write parasitic adaption of flat worm
Answer:
Parasitic flatworms protect themselves from the host's digestive liquids by developing teguments or resistant coverings around their bodies. They secrete anti enzymes to neutralize the digestive juices of host which are produced in intestine where flatworm lives.
Describe the role chemical signals play a role in both the nervous system and the endocrine system
Why are viruses not living??
Answer:
Viruses are not living cause they need any host (body or living organism) To perform its function.
Explanation:
Answer:
Viruses are not living things. Viruses are complicated assemblies of molecules, including proteins, nucleic acids, lipids, and carbohydrates, but on their own way they can do nothing until they entered a living cell. Without cells viruses will not be able to multiply. Therefore viruses ante not living things.
If you were running an experiment to determine the color of light at which beans grew best, what would be the variable?
Group of answer choices
the number of beans plants in the experiment
the amount of water you give the beans
the color of the light under which each bean is grown
the height to which you let the sprouts grow
Answer:
The number of beans in the experiment
Explanation:
I hope it helps choose me the brainer
After photosynthesis, how will producers get their energy? Producers receive glucose from the intake of oxygen. Producers will release glucose into the atmosphere, feeding the ecosystem. Producers will create glucose, which is the primary source of food. Producers will receive glucose directly from any rainfall that occurs.
Answer:
After photosynthesis (Producers will create glucose, which is the primary source of food)
Explanation:
The biotic component of an ecosystem is made up of all living organisms in it. These organisms are divided into two main groups according to the way they feed:
--> Producers (autotrophs) and
--> Heterotrophs.
Producers are organisms that are able to use sunlight or chemical energy to manufacture their own food (glucose) from simple inorganic substances. This process is known as photosynthesis. Producers include all green plants, photosynthetic protists and some bacteria
Producers extract inorganic nutrients and chemical energy from their non-living environment, that is, from the abiotic component of the ecosystem. Since autotrophs are the only organisms that can produce food in an ecosystem, they are also known as PRIMARY FOOD PRODUCERS.
PRODUCERS use some of the food they produce for their activities and building their body tissues (growth). The rest is stored in various parts of the body.
Answer: Its C, Producers will create glucose, which is the primary source of food.
Explanation: The person above me is right and I also got it right on the test :) hope this helps.
any 5 Reason wetlands destroy?
Answer:
Deforestation
flood
landslide
waste drainge
Unplanned urbanization
Explanation:
these are the main 5 problems that destruct the wetland
How do buffers play a role in
homeostasis in living things?
Answer:
Buffers are commonly used in living organisms to help maintain a relatively stable pH.
In biological systems, chemical buffers prevent sharp and sudden changes in pH.
In biology, homeostasis refers to stable conditions required for the survival of organisms.The pH is a scale used to determine how acidic/basic water is. The pH range from 0 to 14 ( a pH equal to 7 is neutral).In human blood normal pH is about 7.35 to 7.45. A sudden change in this value alters and negatively affects the homeostasis of the body.The carbonic acid-bicarbonate is the most important chemical buffer which is used for mantaining acid-base balance (homeostasis) in the blood.The blood pH can change due to respiratory acidosis/alkalosis and metabolic acidosis/alkalosis.In conclusion, chemical buffers prevent sharp and sudden changes in pH.
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Answer two questions in detail and get brainliest!
1.Explain what makes a scientific experiment reliable. Be sure to include at least three reasons to support your answer.
2.During research, why is it important to use peer reviewed evidence when collecting background information during a scientific investigation?
Answer:
1:When a scientist repeats an experiment with a different group of people or a different batch of the same chemicals and get very similar results then those results are said to be reliable.Reliability is measured by a percentage if you get exactly the same results every
time then they are 100% reliable.
2.The peer reviewer determines whether the introduction provides sufficient background information on the research topic, and ensures that the research question and hypothesis are clearly identifiable.
Explanation:I really hope this helped you in any way (pls tell me if I did anything wrong)
What effects are produced on environment by industry?
Answer:
climate change, loss of natural resources, air and water pollution and extinction of species.industrial processes can have negative environmental impact.
Explanation:
Food chains represent
1 point
the movement of energy through the environment
the movement of energy from a consumer to producer
the loss of energy in the ecosystem
the importance of DNA
To test how fertilizer affects tomato plants, a farmer divided a field of young
tomato plants into 10 plots of equal size. The farmer then put fertilizer on half
of the plots and no fertilizer on the other half of the plots. What is the control
group in this experiment?
Answer:
The plots with no fertilizer
Explanation:
In an experiment, the control group is used as a comparison for the experimental group (the group being actively changed and observed).
So, in this experiment, the control group is the plots with no fertilizer.
This acts as a good control group because it provides a normal standard to show the effect of fertilizer on the tomato plants.
So, the control group in this experiment are the plots with no fertilizer.
The Punnett square illustrates a cross for color of the flower.
Based on the phenotypes and genotypes of these offspring. It is clear that purple flower color allele is
and the parents are
dominant
polygenetic
recessive
ntum. All rights reserved.
hp
Answer:
All right reserved
Human skin color is a good example of polygenic (multiple gene) inheritance. Assume that three "dominant" capital letter genes (A, B and C) control dark pigmentation because more melanin is produced. The "recessive"alleles of these three genes (a, b & c) control light pigmentation because lower amounts of melanin are produced.
hope it will help
Here, from the cross of the purple and white flower, all offspring are purple, which indicates that the purple color is dominant in nature and is present in Option A.
What is Punnett Square?The Punnett square is a tool used to predict the probability of offspring inheriting specific alleles from their parents. If all of the offspring exhibit the same phenotype (such as purple flower color), it is likely that the parents both carried at least one dominant allele for that trait. This would mean that the purple flower color allele is dominant. Here, the parents are both purple and white, so all the offspring are dominant in nature.
Hence, from the cross of the purple and white flower, all offspring are purple, which indicates that the purple color is dominant in nature and is present in Option A.
Learn more about the Punnet Square here.
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complete question is below
The Punnett square illustrates a cross for color of the flower (purple- parent, white -parent). Based on the phenotypes and genotypes of these offspring (all purple), it is clear that purple flower color allele is
A.) Dominate
B.)polygenetic
C.) recessive
sow a seasonal seed and investigate its germination. write down all the conditions required for its germination.
Please answer correct
i need urgent
Answer:The conditions required for germination is the proper amount of water, oxygen, temperature, sunlight, PHOTO in water. etc.
Explanation
what are the structural adaptation of whales and dolphins (compare them please)
Answer:
Whales and dolphins are mammals and have lungs instead of gills for breathing. They have blowholes at the tops of their heads that function like nostrils; they need to put their heads above water every so often to breathe. Both dolphins and whales have hair instead of scales, another quality that is specific to mammals. The animals have live births instead of laying eggs, and baby dolphins and whales nurse from their mothers. Whale and dolphin births take place near the surface of the water, so the young animals can easily take their first breath.
Both whales and dolphins rely on the sounds they make for survival, even though the sounds are utilized differently by each animal. For instance, whales make high-pitched groans and whistles to communicate with one another to warn against danger or navigate during migration
Answer:
COMPARISON AND CONTRAST OF WHALES AND DOLPHINS
Both dolphins and whales belong to the cetacean family and are marine animals that reside in the ocean. Some scientists even assert that dolphins are a type of whale, as the two animals have a number of shared characteristics. However, there are distinct differences between whales and dolphins as well that will teach you more about the physical appearance of these marine creatures and how they survive in their environment.
What would be the appropriate si unit for the height of a cow?
Explanation:
metre would be the approriate si unit
For a scientist, assessing the validity of information requires
a specific knowledge
b. a hypothesis
c. experimentation
d. questions
Please select the best answer from the choices provided
Ο Α
ОВ
Ос
OD
Answer:
The correct answer is letter C. Experimentation.
Explanation:
For a scientist, assessing the validity of information requires experimentation. In statistics and sciences, the validity of an information has no agreed definition but it generally refers to the how the concept is being experimented before reaching to the point of conclusion.
Question 6 of 10
Which statement best describes the limits of science?
O A. Science cannot answer questions about the natural world.
OB. Science cannot answer questions about what people should do.
O C. Science can answer any question.
O D. Science can answer only mathematical questions.
SUBMIT
Answer:
I think B should be the answer because science cannot tell the future
Escherichia coli infections Multiple Choice can cause an inflammatory disease similar to Shigella dysentery. include urinary tract infections from normal flora strains. All of these choices are correct. are often transmitted by fecal contaminated water and food. involve enterotoxin in traveler's diarrhea.
Answer:
E. All of the choices are correct.
Explanation:
Escherichia coli infections
A. are often transmitted by fecal contaminated water and food.
B. include urinary tract infections from normal flora strains.
C. involve enterotoxin in traveler's diarrhea.
D. can cause an inflammatory disease similar to Shigella dysentery.
E. All of the choices are correct.
is when a system is in motion but is balanced because it experiences no net change,
A. Dynamic equilibrium
OB. A convection current
C. Static equilibrium
D. Co-evolution
Answer:
i think A
Explanation:
A scientist is researching Down Syndrome. He is studying what type of disease?
Some diseases/conditions are caused by deficiencies in these nutrients (vitamins). Name one such
disease, say what element is deficient, and describe the symptoms and treatment. Who usually gets
the disease? Is it more common in certain areas?
answer;
The most widespread nutritional deficiency worldwide is iron deficiency.
Iron deficiency can lead to anemia. This is a blood disorder that causes fatigue
symptoms;
Feeling tired or weak.
Having pale skin.
Having shortness of breath.
Sweating.
Being dizzy or feeling faint.
Rapid heartbeat.
Having headaches.
treatment;
Iron supplements taken by mouth.
Foods high in iron and foods that help your body absorb iron (like foods with Vitamin C).
Iron given through an intravenous (IV) infusion. (This is often a choice if you have chronic kidney disease, or CKD.)
Transfusions of red blood cells.
Women of childbearing age are the population with the most affected individuals, with an estimated 468 million being non-pregnant women.
Explanation:
Hi I am really struggling with this question. I'll take any help I can get. :)
Answer:
Question- How does temperature affect rate of respiration?
Independent V. - Temperature
Dependent V. - Rate of respiration
Constants
- Fish species
- Water oxygen levels
- Size of the fish
Hope this helps!
Which cells contain chloroplasts?
A:cells in plant leaves
B:cells in plant roots and stems
C:cells in animal muscles
D:cells in animal brains
Answer:
cell in plant's leaves
Explanation:
cell in plant's leaves
Answer:
A:cells in plant leaves
Explanation:
Chloroplasts are located in the leaves of plants,which contains chlorophyll.This aids in photosynthesis.
I hope this helps :)
Why do water molecules "stick together"?
Answer:
Water molecules tend to stick together due to the structure and charge of the atoms present in the water. Hydrogen atoms are positively charged while oxygen atoms are negatively charged. ... All water molecules are exerting cohesive forces on all the molecules around them including those on the surface of a body of water
help pls, just need this part on the top
Answer:
Concentration Gradient
Explanation:
This means that it will move from a region where it's in lower conc to a region of higher conc
cual es la energía que se encuentra ligada a la estructura de la materia.
Answer:La energía eléctrica o electricidad es un fenómeno físico que se produce a raíz de las cargas eléctricas y de la interacción entre ellas. De esta forma, son los electrones y los protones las principales partículas subatómicas responsables de su aparición.
Explanation:
What is "Radioactive Dating"?
A. A method of determining the age of a fossil that estimates the age of the organism at its death
B. A method of determining the age of a fossil based on the amount of certain isotopes that remain in a fossil or rock
C. A method of determining the age of a fossil that estimates how closely related various fossilized organisms were
D. A method of determining the age of fossil based on a comparison to the age of other similar fossils
Answer:
Unlike relative dating methods, absolute dating methods provide chronological estimates of the age of certain geological materials associated with fossils, and even direct age measurements of the fossil material itself.
Hi please answer the following questions
•Mercury is used in temermeter.Give reason!
•Name two non flowering plants
•Some leaves are modified to trap insects. Give reason.
Answer:
It's used in thermometers because it has high coefficient of expansion.
conifers,mushrooms
plants trap insects because they grow in soil which is usually thin and is also poor in nutrients , so they eat insects to fulfill their nuttient requirement
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