Which of the following is part of the structure of the mitochondria of a eukaryotic cell?
A) cilia
B) cristae
C) thylakoids
D) inclusions
E) nucleolus
B
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What did Mendel propose to explain the 3:1 ratio of dominant to recessive traits he observed in his pea plants?
a. Plants expressing dominant traits carry three copies of the genes for those traits versus only one copy for recessive traits. b. Plants with dominant traits were 300% more likely to survive to maturity after fertilization when they could be observed. c. Each plant had two copies of each trait, and recessive traits were only expressed if both copies were the recessive form. d. All pea plants contain the same genetic material, but dominant pea plants express traits three times more strongly than others.
Because of genetic differences in people's responses to medications, there are over 100 different types of ____
a. antibiotics b. muscle relaxers c. tranquilizers d. blood pressure medications e. stimulants
As you climb a flight of stairs, what type of energy are your legs in motion using?
a. kinetic energy b. thermal energy c. chemical energy d. electrical energy e. potential energy
Why is the actual flow of air into the alveoli during inspiration passive?
A. because the intercostal muscles are involved B. because there is a continuous column of air from the pharynx to the alveoli C. because the diaphragm is involved D. because the lungs are surrounded by the thoracic wall E. because the alveoli have a very large surface area