Charles Darwin, when developing his theory of adaptation by natural selection, incorporated the observation that
a.) offspring are adapted to avoid resembling their parents in order to avoid mate confusion.
b.) offspring tend to resemble their parents.
c.) all competition between individuals within a species is over mates.
d.) variation in offspring is shaped by the behavior of the parents during their lifetimes.

Option B) offspring tend to resemble their parents.

Explanation:

Gregor Mendel work using garden peas primarily explained heredity (the transmission of traits from parents to their offspring)

Thus, his work incorporated the observation that offspring tend to resemble their parents.

satellites are frequently used to make observations of the orbit on earth

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.