Which of the following traits does the fossil
above share with modern birds?
a. long, clawed fingers on each forelimb
b. it had teeth
c. it had feathers
d. it had a long bony tail
e. all of these
C
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In animal skeletal muscles, red muscle fibers ____
a. have an abundance of myoglobin b. are mainly anaerobic c. have few mitochondria d. are good for short bursts of activity e. make ATP by lactate fermentation
Carbohydrates consist of carbon, hydrogen and oxygen in a ratio of ____________________. Fill in the blank(s) with the appropriate word(s)
Human use of ecosystems
A. is in harmony with natural ecosystems. B. increases the number of animals present. C. requires the alteration of previously existing ecosystems. D. does not occur.
A group of ten tomato plants are germinated and maintained in a large tray with no drainage. After several weeks they all begin to wilt and die despite repeated watering and fertilization. The most likely cause of this die-off is _____
A) competition for resources B) a lack of oxygen for the roots C) organic nutrient depletion D) no room left for root growth