Plant tissue specialized for conducting fluids is known as ____
a. ground tissue
b. protoderm
c. vascular tissue
d. meristem
e. dermal tissue
ANSWER: c
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The term polymorphism refers to the phenomenon that a trait displays variation within a population. Which of the following is an example of polymorphic trait in a population?
A. The A, B, O blood types found in humans. B. The loss of hair in elderly animals that are malnourished. C. The pink or white flowers of the four o'clock flower, both pink and white individuals are prevalent. D. Both the A,B,O blood types in humans and the pink and white flowers of the four o'clocks. E. Both the A,B,O blood types in humans and the loss of hair in elderly animals that are malnourished.
The event called the Cambrian Explosion resulted in an abrupt increase in
A. geological activity. B. diversity of major animal groups. C. algal diversity. D. the number and size of glaciers. E. the amount of fish, of a single species, in the seas.
Which statement about birds is true?
a. Bird feathers are modified reptilian scales. b. Bird lungs are similar to mammalian lungs. c. A bird’s primary feathers provide lift. d. Most bird species have two ovaries.
Adult echinoderms that have radial symmetry lack
A) a coelom. B) nervous tissue. C) a head. D) a tubular gut with separate mouth and anus. E) a method of movement.