I think it’s fats. Let me know.
Answer is A. A population becomes separated by environmental factors into two groups that do not reproduce with one another.
When a population of a species become geographically separated then gene flow between them stops. Over a period of time, the population may become genetically different in response to the natural selection due to different environments. Selection and genetic drift will act differently on these two separated populations. This will results into two separate species. This type of speciation is called allopatric speciation.
The components<span> of </span>animal cells are centrioles, cilia and flagella, endoplasmic reticulum, golgi apparatus, lysosomes, microfilaments, microtubules, mitochondria, nucleus, peroxisomes, plasma membrane and ribosomes.<span>The centrosomes is where microtubules are made. During </span>cell<span> division (mitosis), the centrosome divides and the two </span>parts<span> move to opposite sides of the dividing </span>cell<span>. The centriole is the dense center of the centrosome. cytoplasm - the jellylike material outside the </span>cell<span> nucleus in which the organelles are located. Thats what i found when i researched about animal cells. Hope this helps, I put what i know and reaserched the rest.</span>
The main groups of unicellular organisms are bacteria<span>, </span>archaea<span>, </span>protozoa<span>, unicellular </span>algae<span>, and unicellular </span>fungi<span>. </span>
