List two features that distinguish the seedless vascular plants from the bryophytes.
What will be an ideal response?
(a) Dominant portion of the life cycle is the gametophyte in bryophytes, the sporophyte in the seedless vascular plants.
(b) Seedless vascular plants have vascular tissue and bryophytes do not.
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Members of the phylum ____ exhibit radial symmetry, with their body parts arranged regularly around
a central axis.
a. Porifera b. Mollusca c. Cnidaria d. Platyhelminthes e. Chordata
The population is entering exponential growth at letter ____
a. A b. B c. C d. D
e. EA chemical interaction in which the products contain
less free energy than the reactants is called a(n) __________ reaction. Fill in the blank(s) with the appropriate word(s).
In a neuron, a graded potential:a
does not vary in magnitude. b. becomes stronger as it propagates. c. only generates slow action potentials. d. fades out within a few millimeters. e. propagates only along unmyelinated axons.