<em>Both the Acanthostega and the Icythyostega were animals characterized by having four extremities and be equipped with gills and lungs at the same time, which determines that they are called tetrapods similar to fish.
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<em>Their characteristics made them suitable for living in aquatic and terrestrial environments, so they probably inhabited shallow waters or even the surface of the earth.</em>
Answer:
may be the answer is
DNA polymerase is an enzyme that works to transport DNA from the nucleus to the cytoplasm.
The answer is A:4,5,3,1,2.
The specific set of alleles an organismhas makes up its genotype. Thesegenes influence the way an organism looks, which is known as itsphenotype. Phenotype is mostly aresult of an organism's genotype, but environment can also influence physical characteristics.
If an egg cell were treated with EDTA, a chemical that binds calcium and magnesium ions, the fertilization envelope would not form.
An eggshell is a soft outer coat and a semipermeable membrane that is made up of calcium carbonate (CaCO3).
It is semi-permeable so air and water can not pass through it and the inside material remains intact.
A small shell or outermost coating called 'cuticle or bloom' prevents bacteria and other microorganisms to get inside the egg shell.
Moreover, egg yolk is a rich source of protein and other beneficial organic compounds.
Egg shell are used as chicken feed.
If you need to learn more about calcium and magnesium ions click here:
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