Which of the following terms is used to describe several planets orbiting a star?

a constellation

the universe

a galaxy

a solar system

Why did mendel use pea plants in his experiments? a. they have no alleles. b. they are haploid organisms. c. they reproduce quickly. d. they are all male.

Put each tile to the correct location. categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. 1) scientific theories 2) both 3) scientific hypothesis a). a tentative statement used to guide scientific investigations b). makes predictions about future events c). can be tested many independent researches d). based on observations of natural phenomena e) . a well-established highly reliable explanation

How have crops been modified? a. plants have been made more susceptible to pests b. plants have been made resistant to herbicides c. plants have been made more susceptible to herbicides d. plants have been modified to have reduced yield