Explanation:
Meiosis I
At the beginning of meiosis I, a human cell contains 46 chromosomes, or 92 chromatids (the same number as during mitosis). Meiosis I proceeds through the following phases:
■ Prophase I: Prophase I is similar in some ways to prophase in mitosis.
Answer:
Ribosomes are different from other organelles because they have no membrane around them that separates them from other organelles, they consist of two subunits, and when they are producing certain proteins they can become membrane bound to the endoplasmic reticulum, but they can also be free floating while performing. Hope this helped!
.Explanation:
Answer:
it would be at the bottom of the hill. That's where all of the energy from the descent is at its peak.
Habitat preservation involve the protection of an entire habitat area for wlild animal and plant.It conserve reliance species and prevent their exitinction, fragmentation or reduction in range.Habitat conservation is important is maintaining biodiversity which is an essential part of global food security
Answer:
The correct answer is e. <em>Postzygotic barrier.</em>
Explanation:
Different species can not mate and produce viable, healthy and fertile descendence, due to certain mechanisms of <u>reproductive isolation</u>.
These mechanisms involve different kinds of barriers that make it difficult for two different species to produce viable and fertile progeny.
One of these is the <u>postzygotic barrier</u>, which avoids the hybrid zygote to develope to adultness. In these situations, there is a mix of chromosomes that can not happen to meet or that they lack information.
There are cases in which the embryo dies, but some times the individual can reach some more advanced develope stages. If this is the case, in general, they can not survive because the organism is unhealthy. And if they reach adultness in good sate they can not leave descendence, as they are sterile.