What is the significance of activation energy?
What will be an ideal response?
ANSWER: Activation energy is the initial energy investment required to start a reaction. Without this
initial energy, reactions will not start.
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A reciprocal exchange in which a pair of DNA with the same nucleotide sequence break and rejoin in a crossover is called ________ recombination.
A. site-specific B. replicative C. homologous D. None of the choices are correct.
Which of the following contributes to subfertility?
A) Regular menstrual cycles B) High sperm counts C) Being under 30 years of age D) Oligospermia
The body’s inner surfaces are protected against penetration by harmful microorganisms by ____
a. water permeable outer skin layers b. watery mucus c. high pH of gastric and vaginal environments d. cilia e. warm, moist environments
According to Mendel, if a male that is homozygous for the dominant form (PP) of a trait is crossed with a female that is
homozygous for the recessive (pp) form of a trait, all offspring will show the ____ form of the trait. a. sex-linked b. dominant c. recessive d. codominant e. lethal