BIOLOGY HIGH SCHOOL

A retrovirus is?a. is a primitive virus.
b. has a genome made of RNA.
c. has the simplest of all protein coats.
d. was discovered before any other virus.

How is the virus reproduced during the lysogenic cycle?
a. through reproduction of the host cell
b. by using viral enzymes to reproduce viral DNA
c. by using the cell's enzymes to reproduce viral DNA
d. by breaking the cell open and releasing new viruses

Answers

Answer 1
Answer:

Ans. (b). has a genome made of RNA.

Retroviruses are viruses with RNA molecules as their genome. They insert a copy of their RNA genome into the host cell DNA and change the cell genome. These viruses are generally known as single-stranded positive-sense (+ strand) RNA viruses.

Examples: Human immunodeficiency virus and hepatitis B virus.

Thus, the correct answer is option (b).

Ans. (a). through reproduction of the host cell.

Lysogenic life cycle is a virus reproductive cycle that involves integration of viral nucleic acid into host's genome or formation of a replicon in host's cytoplasm.

The host cells (bacterial cells) remain alive and reproduce normally, so thus, viruses reproduce through the reproduction of host (bacterial cells).

Thus, the correct answer is option (a).

Answer 2
Answer: A retrovirus virus has a genome made of RNA. A virus during the lysogenic cyle is the reproduction through the host cell.

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Draws conclusions about the nutritional relationships that exist between fox, rabbit and lettuce

Answers

Answer:

Explanation:

According to the nutrition between the fox, the rabbit and the lettuce, it can be concluded:

-All three belong to the food chain of a specific region.

-The lack of any, would make the chain unbalanced, breaking it.

-The fox is a carnivore, so it feeds on the rabbit. While the rabbit is     herbivorous, it feeds on plants.

-The rabbit and the fox are mammals, while the lettuce belongs to the Asteraceae family.

Over millions of years, birds developed as a species. This relates to _____.

Answers

Answer;

-Macro evolution

Over millions of years, birds developed as a species. This relates to macro evolution.

Explanation;

-Macroevolution refers to evolution of groups larger than an individual species. Macroevolution encompasses the grandest trends and transformations in evolution, such as the origin of mammals and the radiation of flowering plants.

-The basic evolutionary mechanisms include; mutation, migration, genetic drift, and natural selection; and can produce major evolutionary change if given enough time.
The correct answer to the question which is stated above is : Over millions of years, birds developed as a species. This relates to evolution.  It was believed that over millions of years of evolution have adapted each bird species to fit into its own little niche.

Jane supplied plenty of water, minerals, sunlight, and carbon dioxide for her plant. But the plant still didn't do well. What might be the reason?

Answers

Even though Jane supplied plenty of water, minerals, sunlight and carbon dioxide to her plant, the plant will still not do well because plants do not require carbon dioxide for growth. Plants need oxygen coupled with suitable temperature, light, water, and mineral nutrients for growth.

Answer:

The answer you are looking for is The plant doesn't need carbon dioxide.

Explanation:

Because yes!! Also I hope you have a wonderful wonderful day!! :D

How do living organisms create macromolecules, organelles, cells, tissues, and complex higher-order structures?A.The laws of thermodynamics do not apply to living organisms.
B.Living organisms create order by using energy from the sun.
C.Living organisms create order locally, but the energy transformations generate waste heat that increases the entropy of the universe.

Answers

Answer:

C.Living organisms create order locally, but the energy transformations generate waste heat that increases the entropy of the universe.

Explanation:

Entropy is a concept of thermodynamics that measures the disorder of particles in a physical system. Living organisms create some disorder through reactions that generate waste heat so that through heat-shaped energy, organelles capable of generating macromolecules, organelles, cells, tissues, and higher-order complex structures are ordered.

Darwin observed how farmers and breeders produced many kinds of farm animals and plants. These plants and animals had traits that were desired by the farmers and breeders. He also noticed how the study of similar body structures and vestigial organs could add to the evidence of evolution. After performing several breeding experiments, he came to certain conclusions and formulated some theories. His theory of evolution and natural selection is the most accepted one. What is the reason behind the acceptance of Darwin's theory?

Answers

Natural selection was actually accepted by a lot of people who knew what Darwin was talking about (e.g. Scientists and biologists..and other scientist relative to science were called).
 Darwin  was the first to realize the mechanisms that fundamentally drive this change: variation and natural selection. His theory caused controversy among his contemporaries but were  gradually accepted. Darwin's theory earned general scientific acceptance after he published his "On the Origin of Species" in 1859.

The answer is simply: A the other person is too confusing...

Efore cell reproduction or mitosis can proceed, what is the correct sequence of steps that MUST first occur?A) chromosome replication, chromosome checking and repair, growth
B) growth of cytoplasm, duplication of cellular organelles, chromosome replication
C) replication of chromosomes, growth, duplication of cellular contents and organelles
D) growth, chromosome replication, repair of chromosomal errors, duplication of cell organelles,

Answers

C) replication of chromosomes, growth, duplication of cellular contents and organelles
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