Why did the British naturalist Edward Forbes conclude that animal life could not exist in the sea below a depth of 55 meters?
What will be an ideal response?
At the time scientist knew only about surface organisms and applied what was known of their natural history and environmental requirements to sustain life to the deep-sea environment. As light gradually is reduced with depth, so is photosynthesis, and thus grazers would be limited. The low light would make finding a mate nearly impossible. Temperatures in the deep remained too cold throughout the year as surface organisms often expand their populations during the warmer periods. Pressure on these animals often was thought to increase beyond their ability to compensate.
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When bone tissue first evolved in vertebrates, it was found within _____
A) an endoskeleton B) an exoskeleton C) a vertebra D) a skull E) a jaw
where is EBV dormant?
What will be an ideal response?
The range of all factors that influence whether a
species can obtain resources essential for survival and reproduction is its a. habitat. b. niche. c. carrying capacity. d. ecosystem. e. community.
Human herpesvirus 4 (EBV) has been implicated as an etiological agent in some cases of Hodgkin's lymphoma
Indicate whether the statement is true or false