This animal has a small coelom, soft body, a
hinged two-part shell, and no distinct head.
This animal is ___.
a. a clam
b. a slug
c. an octopus
d. a planarian
e. more than one of these
A
You might also like to view...
Which of the following environmental factors might lead to year-round, rather than seasonal, reproductive activity?
A. a yearly rainy season B. stable food supplies C. day length D. daily ocean tides E. seasonal temperature changes
With __________ growth, a small population starts growing slowly, then grows rapidly, and then
levels off once __________ is reached. Fill in the blank(s) with the appropriate word(s).
Starling's law of the heart states that the heart pumps:a
more forcefully when more blood is delivered to it. b. more rapidly when less blood is delivered to it. c. less forcefully when oxygen-rich blood is delivered to it. d. slower when more blood is delivered to it.
e. slower when norepinephrine is secreted.Which of the following best explains why bacteria have the greatest biomass of any other plant or animal on earth?
a. Bacteria are able to live essentially anywhere—soil, air, water, ice, etc. b. Some bacteria can make their own food. c. Some bacteria can survive and thrive with or without oxygen. d. There is one dominant species of bacteria that has a greater molecular weight than other bacteria, accounting for the high biomass. e. The first three choices are correct.