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arlik [135]
3 years ago
5

What protects plants from threats that could potentially kill the plant?

Biology
2 answers:
DIA [1.3K]3 years ago
3 0
B. Xylem and phloem
kondaur [170]3 years ago
3 0

Answer:

B

Explanation:

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"To restore and maintain the chemical, physical, and biological integrity of the nation's water" was the purpose of
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Most sperm cells die in the vagina when entering the female's body because Most sperm cells die in the vagina when entering the
taurus [48]

Answer:

of the low pH of the vagina.

Explanation:

The pH of the vagina is maintained at highly acidic levels to prevent the germ buildup. The range of vaginal pH is around 3.8 to 4.5. The very low pH of the vagina creates a hostile environment for sperms and most of the sperms are killed as they enter the vagina due to the acidic pH.

Apart from supplementing the sperms with energy, cervical mucus serves to protect the sperms from the hostile conditions of the vagina. The cervical mucus has an alkaline pH at or near the ovulation to protect sperms from acidic pH of the vagina and to facilitate fertilization.

6 0
3 years ago
How do trees act as carbon sinks?
Romashka [77]


The best answer is D.

A carbon sink is anything that absorbs more carbon than it produces or releases.

The main carbon sinks found in nature are plants, the ocean and soil.  Plants such as trees capture carbon dioxide from the atmosphere and use it in photosynthesis. Part of this carbon is transferred to soil as the trees and other plants die and decompose.

Due to the effectiveness of trees and other plants as carbon sinks,  the Kyoto protocol proposed that emission reduction can be achieved through absorption of carbon dioxide by these plants. 



5 0
3 years ago
Read 2 more answers
Wich is a nitrogen base that is located within an RNA molucule, but NOT within a DNA molecule?
gtnhenbr [62]

<u>Answer:</u>

The correct answer is Uracil which is nitrogen base found in RNA.

<u>Explanation:</u>

Uracil is a nitrogenous base which is located within an RNA molecule but not within a DNA molecule.

Uracil, represented by the letters A, G, C and U, is one of the four nucleobases that are found in the nucleic acid of RNA which binds to adenine.

While thymine is present in the DNA and binds to adenine.

6 0
3 years ago
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