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Svetlanka [38]
3 years ago
15

- 7th Grade Work -

Biology
2 answers:
OLEGan [10]3 years ago
7 0
We depend on the food chain and lower tier animals in order to feed other animals. It both keeps the ecosystem populations balanced whilst helping out all of the organisms
Nat2105 [25]3 years ago
4 0

Explanation:

Human health ultimately depends upon ecosystem products and services (such as availability of fresh water, food and fuel sources) which are requisite for good human health and productive livelihoods. Significant direct human health impacts can occur if ecosystem services are no longer adequate to meet social needs.

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When genes for two different characters segregate in a cross, what type of cross is it?
AnnyKZ [126]
<span>d. type. Different genes always assort independently whether the genes reside on the same chromosome or on different chromosomes. 8. When genes for two different characters segregate in a cross, what type of cross is it?</span>
8 0
3 years ago
"viral reverse transcriptase to make a DNA copy that is integrated into the host genome and then host RNA polymerase transcribes
mihalych1998 [28]

Answer:

"Viral reverse transcriptase to make a DNA copy that is integrated into the host genome and then host RNA polymerase transcribes it is a true statement.

Explanation:

The virus is an infectious agent which is not considered living either considered non- living. The virus particles contain the genetic material that determines the trait of a virus in the form of either DNA or RNA.

The virus which contains the RNA replicates themselves by fist converting their RNA into DNA by reverse transcriptase enzyme. Once the DNA is made, the DNA is incorporated in the genome of the host and the machinery of the host performs the replication, transcription and translation.

Thus, the selected option is true.

5 0
3 years ago
Which viral replication cycle is represented in part A of this diagram?
Burka [1]

Answer:

The correct answer is - option D. lytic cycle.

Explanation:

The lytic cycle is one of the two viral reproduction cycle. Generally, it is the major reproduction cycle. In this cycle reproduction of the viruses takes place inside the host cell and produce more viruses. In the production of the more viruses the host cell and it''s destruction takes place in the end. The 5 steps that takes place are as follows:

1- attachment - viruses attach to the cell.

2-penetration- only nucleic acid or genetic material is injected into the host cell through the hole made by the tail fibers and enzymes.

3- synthesis - replication of viral nucleic acid and protein and envelope.

4- assembly - assembling of the new viruses formed.

5- release.

Thus, the correct answer is - option D.

5 0
3 years ago
This is the period of cell life during interphase between the synthesis of new genetic material and the beginning of mitosis.
RoseWind [281]
The period you’ve described would be the G2 phase which is considered a “checkpoint” that determines whether or not a cell can enter the mitosis phase
4 0
4 years ago
Read 2 more answers
Which of the following statements about the Hardy-Weinberg principle are true?
yan [13]

Answer:

-It assumes certain forces are not acting on a population

-It is used to model genetic equilibrium

6 0
3 years ago
Read 2 more answers
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