Which of these species can reproduce sexually, via self-fertilization, and fragmentation?
a. sharks
b. frogs
c. earthworms
d. bees
c. earthworms
You might also like to view...
Natural catastrophes are considered the result of ____________
Fill in the blank(s) with the appropriate word(s).
Some slime molds make structures called plasmodia which:
A. contain several forms of chloroplasts. B. provide movement for the slime molds. C. contain many nuclei in one large cell. D. are part of the reproductive structures.
The sugar "sink" in roots is the result of
A) active transport of mineral ions into xylem cells. B) absorption of water from the soil through epidermal cells. C) active transport of sugars from phloem to root cells. D) the pull of gravity on sugar molecules.
The water pressure gradient in phloem tubes is formed by the
A) leaves being higher than the roots, which means that gravity creates pressure. B) diffusion of water from one sieve-tube cell to the next. C) loading of sugars into phloem at sources and removal of sugars at sinks. D) active transport of water from sugar sources to sugar sinks.