As a result of worldwide human population growth, many countries are exploring the use of alternative energy sources. One
potential energy source is nuclear power
In nuclear power plants, atoms are split during fission reactions to produce heat. This heat then changes water to steam, and the
steam is used to tum a turbine, so electricity is generated. The heat that is produced by nuclear reactions is so great that the areas
in which these reactions occur must be cooled to keep the reactor stable.
In what way do nuclear reactors negatively affect ecosystems?
A.
Nuclear reactors increase thermal pollution
B.
Nuclear reactors increase air pollution
C.
Nuclear reactors add large amounts of solid waste to landfills.
D. Nuclear reactors produce greenhouse gases.

A.  Nuclear reactors increase thermal pollution

Explanation:

From the analogy provided in this context, we can vividly see that the author is suggesting that the use of nuclear energy causes thermal pollution.

organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.