In many cells, the structure that controls the cell's activities is the nucleus.
The answer is <span>Fish are ectothermic and lay eggs to reproduce, while mammals are endothermic and give live birth to offspring.
Through the elimination process:
</span><span>* Fish are <u>invertebrates</u> and have scales and paired fins, while mammals are vertebrates and have fur or hair. - Fish are vertebrates!
</span><span>* Fish are <u>endothermic</u> and have gills, while mammals are <u>ectothermic</u> and have lungs. - Fish are ectothermic (cold-blooded), and mammals are endothermic (warm-blooded)!
</span>* <span>Fish have streamlined bodies and <u>three-chambered hearts</u>, while mammals are <u>bipedal</u> and have four-chambered hearts. - Fish have four chambered hearts and not all mammals are bipedal!
This leaves choice: </span><span>Fish are ectothermic and lay eggs to reproduce, while mammals are endothermic and give live birth to offspring. All of this is true, but it should be taken into consideration that some fish give live birth and some mammals lay eggs, but this is the most possible choice among all mentioned.</span>
Answer:
It is not necessary in order for the individual to survive
Explanation:
Sexual reproduction as the name implies explains process of reproduction whereby a new organism is created by bringing together the gamete (containing the genetic material) of two parent organisms.
Answer:
See the answer below
Explanation:
These bases are of two different types of molecules: purines and pyrimidines. Purines have <u>double carbon-nitrogen</u> ring(s) in their structure, and pyrimidines have <u>single carbon-nitrogen</u> ring(s) in their structure. 6. The two bases that are purines are <u>Adenine</u> and <u>Guanine</u>. These bases are comprised of <u>double</u> rings. 7. The two bases that are pyrimidines are <u>Thymine</u> and <u>Cytosine</u>. These bases are comprised of <u>single</u> rings. 8. Based on this information, scientists could predict that the base <u>Adenine</u> pairs with <u>Thymine</u> and the base <u>Guanine</u> pairs with <u>Cytosine.</u>
<em>The purine and pyrimidine bases both form parts of the components of the nucleic acids. Purines have double C-N ring structures while pyrimidines have a single C-N structure. The purine bases include Adenine and Guanine while the pyrimidine bases include Thymine (or Uracil in RNA) and Cytosine. According to Chargaff's rule, purine (Adenine/Guanine) pairs with pyrimidine (Thymine/Cytosine).</em>
overall, the cell cycle is the copying and division of a cell. It consists of 4 main parts: G1, S, G2, and M