At about what point in gestation does the fetal heartbeat become audible by stethoscope and the fetus' movements become easily felt by the mother?
What will be an ideal response?
20 weeks
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Two muscle groups that oppose the action of each other include flexors and extensors, like the biceps and triceps. These muscle groups are known as:
A. agonists B. antagonists C. synergists D. contragonists
In monocots, endosperm ____
a. consists mainly of glucose and water b. is consumed by the embryo as the seed develops c. is transferred to the cotyledons d. is largely unused as the seed develops e. matures into a fruit
The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is ____.
A. 0% B. 25% C. 50% D. 75% E. 100%
The mesophyll of the leaf
A. is exposed to direct sunlight. B. is located between the leaf veins. C. is mostly along the edges of the leaf. D. is made up of palisade and spongy parenchyma cells. E. is sometimes found in roots or stems.