What is responsible for the primary source of nutrients and energy of marine animals?
a. Zooplankton
b. Sunlight
c. Endotherms
d. Phytoplankton
d
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Which of the following is not a type of tissue found in an animal?
A. ground B. connective C. epithelial D. muscle
The current extinction rate of vertebrates is 100–1,000 times the historical background. This is primarily due to
A. overharvesting. B. competition with exotic species. C. habitat destruction. D. competition with native species. E. random chance.
Migrating cells move around the developing embryo using ____
a. electrical signals b. genetic markers c. apoptosis d. adhesive cues e. osmosis gradients
To form organic molecules from inorganic molecules it would have been necessary to have
A. protocells. B. a source of energy. C. an atmosphere with ozone. D. All of these answers are correct.