Which enzymes are needed to produce recombinant plasmids to be used in gene transfer?
a. dna polymerase and dna ligase
b. dna polymerase and restriction enzyme (endonuclease)
c. transcriptase and rna polymerase
d. restriction enzyme (endonuclease) and dna ligase

In a certain ecosystem owls are predators for mice. the owl population increases and they eat more mice this causes the mouse population to decrease what happens next? a.the birth of mice increases. b. the birth rate of owls increases c. the population of owls decreases d. the population of mice increases

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.

As an asteroid comes close to earth, it's name will change to? apex