The main reason why the testes are suspended within the scrotum is to provide cooler temperature for the testes and make it fertile for penetrating the egg. The Scrotum may contract or lengthen depending on the temperature of its surrounding.
1. The appearances of fireflies at dusk is an example of a circadian rhythm because it's happens daily. The correct option among all the options that are given in the question is the third option or option "c".
2. During migration, animals undertake a seasonal movement. The correct option among all the options that are given in the question is the first option or option "a".
Answer:
Explanation: They both require the binding of Ligand.
Differences:
Intracellular receptor is located in cytosol. It can be found in the nucleus. It leads to slower responses related to gene transcription. They are steroids. Ligands are lipophilic, small, uncharged; diffuse through membrane and bind to receptor.
Plasma membrane receptor-
The Ligands are hydrophobic and don't have to be small and uncharged; bind only to membrane receptor. Extracellular signaling molecule binds to cell membrane receptor and triggers rapid cellular response (protein hormone)
Answer:
The amount of fossil fuels formed is much less than the amount used.
Explanation:
Fossil fuels, which include petroleum, coal, natural gas etc are an example of non-renewable sources of energy. They are termed non-renewable because they are sources that gets exhausted quickly without replenishment.
One of the characteristics of non-renewable sources of energy is that they get exhausted faster than they can be produced. Hence, regarding fossil fuels as an example of non-renewable source of energy, this means that the amount of fossil fuels formed is much less than the amount used.
