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postnew [5]
3 years ago
13

A membrane that allows only some materials to move in and out of the cell is

Biology
1 answer:
siniylev [52]3 years ago
6 0

It is called a semi-permeable membrane. Most eukaroytic cells have this.

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Cell 4 and cell 7 will not be able to synthesize a major biological molecule. What molecule is this?
IrinaVladis [17]

Answer:

15. Cell 4 and Cell 7 will not be able to synthesize a major biological molecule. What molecule is this? Protein.

6 0
2 years ago
Why is the phloem in a leaf important to the roots of a plant apex?
Nana76 [90]

Answer:

The correct answer will be- phloem transports photsynthetic products to the roots

Explanation:

Phloem is the vascular tissue which specializes in transporting the solute molecules like sugar in the form of sucrose to in the plants.

The phloem connects the photosynthetic organ (Leaves)  to non-photosynthetic organs (stem and roots) of the plants by transporting the photosynthates or sucrose to various parts.

Since the roots also need the energy to perform metabolic functions so need the photosynthates to synthesize the energy molecule. They receive the photosynthates from the phloem.

Thus, phloem transports photosynthetic products to the roots is the correct answer.

5 0
3 years ago
Read 2 more answers
Sentence with electron transport chain?
sukhopar [10]
The electron transport chain is the final stage of aerobic respiration leading to the forming of ATP in the inner membrane of the mitochondrion<span>. 

</span>Mitochondrion<span>, is a membrane-bound organelle found in the cytoplasm of almost all eukaryotic cells. 
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<span>An eukaryote is any organism whose cells contain a nucleus and any other organelles within the membranes.</span>
6 0
2 years ago
An average number of eggs a bird lays is based on natural selection. If a bird lays too many eggs, there a high chance that she
mr_godi [17]

The correct answer is stabilizing selection.

Stabilizing selection is a kind of natural selection in which the mean of the population steadies on a specific non-extreme trait value. This is considered to be the most general process of action for natural selection as the majority of the traits do not seem to vary radically with time.

Stabilizing selection is the reverse of disruptive selection. In spite of preferring individuals with extreme phenotypes, it favors the transitional variants. Stabilizing selection seems to eradicate the more extreme phenotypes, resulting in the reproductive success of the average or norm phenotypes.

This signifies that the most general phenotype in the population is chosen and continues to govern in the coming generations. As the majority of the traits vary slightly with time, stabilizing selection is considered to be the most usual kind of selection in the majority of the populations.


7 0
3 years ago
A dollar weed species has become resistant to a particular weed killer. What happens to the percentage of dollar weed offspring
Nezavi [6.7K]

Answer:

A. The percentage will increase

Explanation:

If the species is becoming resistant to the weed killer, natural selection will cause future generations to become resistant as well, therefore the percentage of resistant dollar weed will increase. Also I took the test lol.

4 0
2 years ago
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