What is one way biologists determine the life stage of birds?
A) counting otoliths
B) plumage
C) examining the gap in wing bones
D) tooth shape
B
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Which of the following is a characteristic of savannas?
a. plants with extensive root systems b. short dry seasons and no trees c. grasses that survive cold winters d. evergreen conifers and frequent rain
Respond to statements 166–169 in reference to the autonomic
nervous system associated with the five regions of the human spinal cord listed below. a. cervical b. thoracic c. lumbar d. sacral e. coccygeal D 166. Sympathetic nerves from this region innervate the bladder, uterus, and genitals. D 167. Sympathetic nerves from this region innervate the kidney. D 168. Parasympathetic nerves from this region innervate the rectum. D 169. Sympathetic nerves from this region innervate the heart.
The kidney filters about 180 liters of blood per day.
a. true b. false
Suppose you are a genetic counsellor, and a man and woman come to you with concerns that if they have a child together, it could have hemophilia. Also suppose that the woman has an X-linked recessive form of hemophilia, but the man does NOT. Which of the following is the best advice you could give them?
a. Each of their male offspring will have hemophilia, and each of their female offspring will have a 50% chance of having hemophilia. b. Each of their male offspring will have a 50% chance of having hemophilia; and while their female offspring should not have hemophilia, they will each have a 50% chance of being carriers. c. None of their offspring should have hemophilia, but each of their female offspring will be carriers for hemophilia. d. Each of their male offspring will have hemophilia; and while their female offspring should not have hemophilia, they wi