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Ivahew [28]
2 years ago
13

Will mark brainliest!!

Biology
2 answers:
saveliy_v [14]2 years ago
7 0
F because it is like a wall for the cell
aniked [119]2 years ago
6 0

Answer:

Choice E.

The plasma membrane is a selectively permeable barrier which allows only certain substances to enter and exit the cell.

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Rocky Mountain juniper (Juniperus scopulorum) and one-seeded juniper (J. monosperma) have overlapping ranges. Pollen grains (whi
jarptica [38.1K]

Answer:

The correct answer is: Yes, this is an example of Reproductive Isolation.

Explanation:

  • Reproductive Isolation can be defined as the mechanism adopted by different species during the course of their evolution, due to which the individuals belonging to different species are incapable of mating with each other and producing viable offspring.
  • The given question is an example of Mechanical, Pre-zygotic Reproductive Isolation.
  • Prezygotic Isolation refers to the mechanism adopted by individuals of different species during the course of evolution such that successful fertilisation of gametes from individuals of different species never occur, hence a viable zygote is never formed.
  • Mechanical Isolation refers to the mechanism adopted by individuals of  different species during the course of evolution such that their reproductive organs or the organs that assist in the process of reproduction are incompatible to each other. Hence, the gametes of each species are unable to come in vicinity of each other.
  • Here, the pollen grain from the flower of one species of juniper is unable to form the pollen tube when its sits on the stigma of the flower of another species of juniper. This is an example of Mechanical Isolation.
8 0
4 years ago
How can chemical differentiation be used to explain the distribution of elements on Earth OR within our solar system?
N76 [4]

Answer:

Substances in nature rarely exist as single element but combination of more than one elements.

This combination of element is referred to as compounds.

These compounds can breakdown from temperature change or change in pressure and so on ,these atmospheric change exist in nature and with long climatic change over a period and could lead to elements recombining and could be transported to other areas from weathering.

4 0
4 years ago
Find at least 5 examples<br> of water in nature as a solid,<br> as a liquid, and as a gas
MrRissso [65]

Answer:

ice, rain, snow, clouds, water vapor

6 0
3 years ago
What is the name of the point mutation on codon 24?
Sunny_sXe [5.5K]
I'm not a hundred percent sure but try asking Google
8 0
3 years ago
What is empty space that is free of matter
garri49 [273]
Outer space is an empty space that’s made up of gases, electromagnetic radiation, magnetic fields, neutrons and dust
4 0
3 years ago
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