How are populations, ecosystems, and communities related? (1 point)
a community consists of an ecosystem and its physical environment, and an ecosystem is made up of many different populations of organisms.
a population consists of a community of organisms and its physical environment, and a community is made up of many different ecosystems.
an ecosystem consists of a community of organisms and its physical environment, and a community is made up of many different populations of organisms.
an ecosystem consists of a population of organisms and its physical environment, and a population is made up of many different communities of organisms.

The correct answer is An ecosystem consists of a community of organisms and its physical environment, and a community is made up of many different populations of organisms.  

When living organisms ( like plants and animals) interact with each other and their environment ( non living factors), they constitute an ecosystem.

Community in an ecosystem is defined as the group of populations of different species, which are present in a particular area. Population is a group of living organisms belonging to the same species.

Thus, population makes community and community makes ecosystem.

Therefore, an ecosystem consists of a community of organisms and its physical environment, and a community is made up of many different populations of organisms.  

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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