The layer where organisms can exist on the surface of the earth is the
(a). biosphere.
(b). ecosystem.
(c). population.
(d). homeostasis.
(e). community.
Answer: (a). biosphere.
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A fertilized, diploid egg is called a ____
Fill in the blank with the appropriate word.
Which of the following statements best describes a herbaceous eudicot stem?
A. Vascular bundles are arranged in a ring which stores water and the products of photosynthesis. B. The stem is composed of primary and secondary tissues. C. Vascular bundles are scattered throughout the stem which is also capable of conducting photosynthesis. D. Vascular bundles are arranged in a ring and the cortex and pith are not distinguishable. E. Vascular bundles are arranged scattered throughout the stem which also stores water and the products of photosynthesis.
The ozone layer is valuable because it blocks
A. heat. B. UV radiation. C. radio waves. D. asteroids. E. X-rays.
Answer the following questions true (T) or false (F)
1. Clinical manifestations of Chlamydia infections arise primarily from an inflammatory response to the destruction of infected cells. 2. Severe suppression of immune function is the only condition that results in reactivation of latent herpesvirus infection. 3. A whitlow is the result of human papillomavirus infection of the skin of the hand.