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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 conclusion, chemical buffers prevent sharp and sudden changes in pH.

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Answer:

i think A

Explanation:

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.

answer: digestive juices act on different kinds of food items and help in the breakdown.

Respective digestive juices act upon their own designated food types and help in the process of metabolism.

Lipase is one digestive juices which acts only on fat.

This digestive juices mostly catalyses the hydrolysis of fats and belongs to the subclass of esterase's

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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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:

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.

c. The total mass of glucose and oxygen formed from photosyntheesis is equal to the total mass of carbon dioxide and water used up during the reaction. (right answer i believe)

The total mass of glucose and oxygen formed from photosyntheesis is equal to the total mass of carbon dioxide and water used up during the reaction.

The reaction is given by.

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.

Explanation:

metre would be the approriate si unit

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.

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)

Answer:

B

Explanation:

Answer:

B.

Explanation:

They conduct multiple experiments to test their theories and hypothesis, and if it comes out wrong, or different, they keep conducting experiments to find the correct answer or solution

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.

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.

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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.

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.

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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

Answer:

Image result for why was domesticating and confining animals so important to the food supply of early civilization

Throughout history, people have bred domesticated animals to promote certain traits. Domestic animals are chosen for their ability to breed in captivity and for their calm temperament. Their ability to resist disease and survive in difficult climates is also valuable.

Explanation:

Domestication of animals help the humans in many ways for eg; Cows and goats gave them milk and meat , Cattle also helped them in ploughing the fields also Cattle and sheep are kept for their wool, skins, mea,t and milk, large animals can also be used to do physical work like carrying things or plowing the field

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.

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 :)

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-.

Esta teoría hace referencia al movimiento actual de las placas que sustentan los continentes y que se desplazan a lo largo de millones de años. En toda la historia geológica de la Tierra, los continentes no han estado siempre en la misma posición. Existe una serie de evidencias que veremos posteriormente que ayudaron a Wegener a refutar su teoría. El movimiento se debe a que continuamente está formándose nuevo material procedente del manto. Este material se crea en la corteza oceánica

Answer:

I think B should be the answer because science cannot tell the future

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:

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

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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

Answer:The conditions required for germination is the proper amount of water, oxygen, temperature, sunlight, PHOTO in water. etc.

Explanation

Answer:

Deforestation

flood

landslide

waste drainge

Unplanned urbanization

Explanation:

these are the main 5 problems that destruct the wetland

Answer:

The correct answer is:

Explanation:

Option A is the correct answer

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