2.
How do you think unicellular organisms reproduce?

Asexually is the simplest one : the cell grows, duplicates its DNA and then splits in two “daughter cells”. That’s mitosis.

Sexually is a bit more complicated because, obviously, the difference between “boys and girls” isn’t the same as for us (no, I won’t make a drawing to illustrate my point!). First the two partners will have to undergo meiosis, a process which will produce either male or female gametes.

Now the difference between male and female lies in the mitochodria (the “power plant” of the cell). To oversimplify things a lot : imagine two persons, both have a cat and want to move together. The problem is that the cats will fight to the death, possibly killing each other and setting the whole place on fire (yep, some extremely territorial kitties). To avoid that, one of the partner will have to leave his cat out. “His” because the partner that leaves the mitochondria out is going the one to be considered male, and the one giving her mitochodria to the offspring will be considered female (because that’s what happens -most of the time- in multicellular organisms like us)

Explanation:

mountains can affect the climate of nearby lands. in some areas, mountains block rain, so that one side of a mountain range may be rainy and the other side may be a desert. much of airborne moisture falls as rain on the windward side of mountains.

explanation:

the index of refraction of the second medium is higher. i just took the test trust me !