Answer:
It means that they keep each others' population regulated.
Explanation:
Without one or the other, ones' population would sky rocket and there would be too many in an unhealthy manner, or the other wouldn't be able to survive and their numbers would drop low.
The answer would be thermal insulator, hope it works goodluck
Answer: b)Steroid hormone receptors are located within the cytoplasm of a cell.
Explanation: Steroid hormones are the element present in the body that provides management in inflammation, metabolism, illness resistant , improves immune function etc. They are obtained from the cholesterol. The particular receptors of the steroid hormone is located at the cytoplasm.
Other options are incorrect because steroid hormone binds the certain receptors only not neurotransmitters .It does not have domain of 20 trans-membrane and is bound to ligand for activation.Thus , the correct option is option(b).
Jellyfish, corals, and hydras belong to the group of animals called cnidarians.
The main characteristic of this group is that all of its members possess specialized cells called cnidocytes which often produce venom and have a role in capturing the animals prey.
The mitochondria because they are the energy-producers for cells