Groups of cells with a common function make up a/an:
A) tissue.
B) limb.
C) gland.
D) organ system.
E) organ.
Answer: A
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The ________ forms the basic unit in ecology
Fill in the blank(s) with correct word
Which cells make up the ground tissue that provides rigid support via the thick, typically lignified, cell walls that remain after the cells die?
a. vessel members cells b. sclerenchyma cells c. tracheids cells d. collenchyma cells
Amniotic eggs evolved as a means to
A. protect the embryo while the parent sits on the egg. B. protect the embryo from predators. C. prevent the embryo from drying out. D. allow the parent to gather food, not sit on the nest.
In some areas of the world where there are large numbers of pines, everything is covered in the spring with a yellow dust that turns out, upon examination, to be pine pollen. Why must conifers produce so much pollen, and why do we not see as much pollen
produced by a field of flowers? What will be an ideal response?