Answer: A constellation
Explanation:
A group of stars is a constellation. The Hubble Deep Field is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope.
Answer:
Inbreeding can lead to a reduced gene pool, making it more difficult to produce new varieties in the future. This also makes organisms prone to certain diseases or inherited defects.
Explanation:
Answer:
option B) intracellular receptors are present only in target cells.
Explanation:
The cell membrane or plasma membrane is composed of phospholipids and thus hydrophobic in nature, this allows the lipid soluble signaling molecules to cross the membrane. The cell membrane of all cells consist of phospholipids thus hydrophobicity of each cell membrane allows lipid soluble signaling molecules to pass through the plasma membrane. The testosterone cross the membranes of all cells but affect only target cells because of intracellular recepters that are located in target cell. The binding of signaling molecules to recepter generates a response. Thus, option B is correct.
Human encroachment that has greatly reduced the prairie dog populations.
Answer:
Can lead to a drastic change, resulting in a decrease in the gene flow among the species of the original forest before fragmentation.
Explanation:
A forest that is divided into small pieces or areas for agricultural purposes will definitely drive away the organisms originally residing in the forest, thereby reducing the rate of mating, and subsequently decreasing the gene flow.
Agricultural areas are areas of land which are devoted to agriculture. That is, for cultivation of crops and rearing of livestock, most especially for commercial purposes.
