<span>Animals that may become endangered due to loss of habitat</span>
The answer is; B
This hormone cases growth at internodes. Elongation at these points causes the plant to grow taller because of the long spaces between the stem nodes. The hormones are produced at meristems of apical buds and roots of plants. It is named after a fungus that infects plants causing them to grow too tall and fall over.
Auxins promote apical growth while cytokinins delay senescence in plants.
Answer:
a. a very cold ecosystem, because they would lose too much body heat
Explanation:
<em>Ectotherms would be l</em><em>east common in very cold ecosystem, because they would lose too much body heat.</em>
Generally, ectotherms are organisms whose internal physiological temperature requirement depends on external sources. They generate very little heat internally and as such, rely on heat sources in the environment for the necessary physiological heat for their bodies.
Consequently, ectotherms live in environments where temperature are more or less constant or constantly seek out external sources of heat for their bodies.
<u>In a very cold environment, the opportunity to seek out external source of heat would not be possible for ectotherms, and body heat would be lost to the environment in the process of maintaining constant body temperature. Hence, they are least likely to occupy this kind of environment.</u>
<em>The correct option is </em><em>a.</em>
Answer:
The correct answer will be option B.
Explanation:
Mitochondria are the double-membrane organelles present in eukaryotic cells which helps in generation of the energy currency that is ATP of a cell.
Mitochondria provide a site for the generation of these ATP molecules, the reason they are known as the kitchen of the cell. Their number in a cell depends on the function of the cell as if a cell is involved in function which need more ATP will have more mitochondria and if not will have few mitochondria.
Since a cardiac muscle cell needs more energy to pump blood from one chamber to another and to body, therefore, cells will have more mitochondria and thus, option B is the correct answer.
