Natural or man-made substances released into soil, air, or water in greater than natural amounts are called:
a. acids
b. pollutants
c. nutrients
d. metals
e. chemicals
b
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Which tissue type will move the body? a. Muscle b. Nerve c. All of these choices
d. Epithelial e. Connective
Which of the following defines ecological resistance?
a. the ability of an ecosystem to remain at equilibrium despite disturbances b. the ability of a species or group of species to synthesize food molecules c. the speed at which an ecosystem recovers equilibrium after being disturbed d. the actions required for the species in a system to remain the same
Why might a seed be covered in prickly hooks?
A) To aid in seed dispersal B) To allow it to float on water C) To keep it from being eaten D) To help the seed germinate E) To attract insects
You find a wormlike, soft-bodied adult animal in a mudflat. It is bilaterally symmetrical, is segmented, has a true coelom, and has a complete digestive tract. Based on these characteristics, what phylum does the animal represent?
A) Cnidaria B) Platyhelminthes C) Nematoda D) Annelida