BIOLOGY HIGH SCHOOL

Which statement describes all enzymes?a. They control the transport of materials
b. They provide energy for chemical reactions
c. They affect the rate of chemical reactions
d. They absorb oxygen from the environment
Please explain why.

Answers

Answer 1
Answer:

Answer: Option C.

Explanation:

Enzymes are defined as the macromolecular that act as biological catalysts which helps to accelerate chemical reactions.

Enzymes increases the rate of chemical reaction by lowering its activation energy. Enzyme can exceed the rate of reaction million times faster..

The molecules at which enzymes act are called substrates, and substrate is converted into several other molecules are called products.

Several metabolic pathways depend upon enzymes that catalyzes every single step of reaction. Enzyme activity majorly affected by other molecules named inhibitors and activators. Inhibitors inhibits or restricts the activity of enzyme while activators increases the activity of enzymes.

Hence, enzymes affect the rate of chemical reactions.
Answer 2
Answer: It's C, enzymes accelerate chemical reactions.

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A certain species of rabbit can have either black or grey fur. The allele for black fur is dominant over the allele for grey fur. If a homozygous black rabbit is crossed with a heterozygous black rabbit, what phenotypic ratio will occur in the first generation?A. 50% black : 50% greyB. 100% black : 0% greyC. 75% black : 25% greyD. 25% black : 75
The range of cells receiving the content of copied cells is called the ____.
What structure is common in all 6 kingdoms of living organisms?

What can be said about prokaryotes and eukaroytes?a. Prokaryotes always have a nucleus, but eukaryotes don't.
b. Both of these cell types contain a nucleus.
c. Eukaryotes always have a cell membrane, but prokaryotes don't.
d. Both of these cell types contain genetic material.

Answers

Eukaryotes always have a cell membrane, but prokaryotes don't. Eukaryotic and Prokaryotic cells are bothbuilding blocks of life in different organisms. The main difference of two isin its structures. Eukaryotic cells contain organelles that are foundinside membranes, like the nucleus, which stores chromosomes and DNA.Prokaryotic cells don't have a nucleus and no true chromosomes. Prokaryotic cellsare unicellular while eukaryotes are multicellular. The presence ofmitochondria, chloroplasts, and cell wall are all distinct to Eukaryotic cells.Eukaryotic cells are found in animals and plants, while bacteria and archaeahave prokaryotic cells. 

In terms of existence, prokaryotes have been onEarth for millions of years; while eukrayotic cells have come to existencethrough the process of evolution.  

What is the importance of geographic isolation in speciation?A. It allows different mutations to arise.
B. It prevents reproduction between populations.
C. It reduces competition between the populations.
D. It protects one of the populations from predation.

Answers

Answer;

B. It prevents reproduction between populations.


Explanation;

Geographical isolation refers to a population of animals, plants, or other organisms that are separated from exchanging genetic material with other organisms of the same species.

Geographic isolation causes individuals of an original species to accumulate sufficient genetic differences to prevent them breeding with each other when they are reunited.

Rhizoids are the _____ of bryophytes.

Answers

The answer is root hairs.

Rhizoids derive from epidermal cells of bryophytes. They are hair-like structures similar to roots of vascular plants. But, they are unicellular structures, unlike roots, which are multicellular. Not only they look alike, but they have similar functions as roots. The functions of rhizoids are the absorption of water and minerals from the soil and a support of the bryophytes.

Difference between monoclonal and polyclonal antibodies

Answers

Answer:

Explanation:

Polyclonal antibodies are made using several different immune cells. They will have the affinity for the same antigen but different epitopes, while monoclonal antibodies are made using identical immune cells that are all clones of a specific parent cell.

Hope this is helpful

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Answers

The changes will occur in an aquatic ecosystem as a result of nutrient loading are: changes in natural flow regimes as a result of water extraction and supply direct modification or destruction of important habitats barriers to the movement of plants and animals. For example within rivers and between rivers and their floodplain effects of poor water quality competition from introduced, exotic animal and plant species. 

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Answers

Answer: external fertilization

Explanation:

External fertilization is the process of fertilization in which the male sperm cells fuses with the female egg cells outside the body of the female. This type of fertilization is used by the organisms which live in the water body.

The salmon is a fish species which utilizes external fertilization. In the case of salmon, the female salmon drops the eggs in the bottom of the water which are fertilized by male salmon after secreting their sperms over these eggs.

external fertilization......................
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