The answer for the given question above about a cladogram showing the evolutionary relationships between different vertebrates is option A. <span> Amphibians and birds share a more recent common evolutionary ancestor than sharks and birds. I hope this helps.</span>
Answer:
<h2>Nuclues</h2>
Prokaryotes lack a defined nucleus (which is where DNA and RNA are stored in eukaryotic cells), mitochondria, ER, golgi apparatus, and so on. In addition to the lack of organelles, prokaryotic cells also lack a cytoskeleton.
Explanation:
Hope it is helpful.....
Primary succession happens in a place where there is no soil cover or it is removed.
an abandoned field- Secondary; because there is cover of soil left, even if vegetation is removed.
<u>a cooling lava flow- Primary</u>; volcanic events lead to loss of soil layer, so this would lead to primary succession
<u>a valley under a glacier- Primary</u>; retreating glaciers are lead to primary succession
an unused farm-Secondary; the soil cover is still present
a burnt forest- Secondary; soil cover is still left for vegetation to start over again
<u>a deserted mine- Primary</u>; because there would be barren rocks left, so soil would be formed by pioneer species first.
