The mammalian sperm cell consists of a head, a midpiece and a tail. The head contains the nucleus with densely coiled chromatin fibres, surrounded anteriorly by an acrosome, which contains enzymes used for penetrating the female egg.
Answer:
Biotic factors are all of the living organisms within an ecosystem. These may be plants, animals, fungi, and any other living things. Abiotic factors are all of the non-living things in an ecosystem. ... Abiotic factors are especially important because they directly affect how organisms survive.
Explanation:
Answer:
Cobalt Co
Explanation:
Co and Zn can fully replace each other, except perhaps for small individual requirements that are met by minute metal concentrations supplied as contaminants.
Answer: C
Explanation:
Does not build hydrophobic bonds with oil because it is hydrophilic.
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Some of the energy is used for metabolism and the rest is released as heat energy.
