How are red algae able to live at greater depths than other algae?
What will be an ideal response?
Chloroplasts of red algae contain chlorophyll a, as well as red accessory pigments (phycobilins). Phycobilins absorb blue–green light, which penetrates deeper into water than light of other wavelengths. Thus, red algae can thrive at greater depths than other algae.
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What would be an easy way to determine if a skull is a mammal's skull?
A. Examine the teeth. B. Look for the remains of the tympanum. C. Look for air sacs in the skull. D. Measure the brain case volume.
Which tissue lines all internal surfaces and the lining of the gut?
A. Epithelial B. Loose connective C. Supportive connective D. Fibrous E. Adipose
A biochemical synthesized in small quantities in one part of an organism and transported to another, where a target cell is affected is a(n)
A. spore. B. scion. C. enzyme. D. callus. E. hormone.
Earth has supported life for approximately
A. 20 billion years. B. 3.8 - 3.7 billion years. C. 1.5 billion years. D. 700 - 800 million years.