Aparticular hormone travels by many types of cells in the body. which mechanism ensures that it acts only on the target cells?
a. the dna of the target cells has the same chemical structure as the hormone's dna.
b. the rna of the target cells has the same chemical structure as the hormone's rna.
c. the target cells have the specific receptors for that hormone.

The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?

Fossils of ancestors of the modern horses show a small 4-toed almost dog-like browsing animal named eohippus over time the horses got larger lost toes and changed to a grazing diet what is the best explanation of why this change occurred

Which if the following best describes why invertebrates isn’t considered a scientifically valid word when classifying animals