The broad, flat part of a leaf is called the __________, while the stalk that attaches the leaf to the stem
is called the __________.
a. stipule; petiole
b. blade; stipule
c. stipule; axil
d. petiole; axil
e. blade; petiole
E
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You purchase two identical houseplants and place them side by side on your windowsill. You water both plants equally. One plant, plant a, you leave alone. On the other plant, plant b, you inject florigen into the cells of the apical meristem. Which of the following would you expect to occur?
A. Both plants will produce flowers at the same time, but plant b will have more of them. B. Plant b will produce a flower at its apical meristem. C. Once the flower is gone, the apical meristem will develop again, and plant b will continue to grow from that stem. D. In subsequent years, plant b will only generate flowers in the same place. E. While flowering, the leaves will stop growing on plant b because florigen inhibitsleaf meristems. F. Once the flower is gone, plant b will grow taller, but only from growth of lateral meristems.
The frequency of heterozygotes for cystic fibrosis shows ethnic variations
a. True b. False Indicate whether the statement is true or false
Blood from the heart's right half moves directly to the ________
a. lungs b. left half of the heart c. aorta d. hepatic portal vein
An example of an animal with a long digestive tract and molars with a large, ridged surface is
a. cat. b. deer. c. dog. d. shark. e. tiger.