What features of the elpistostegalid fishes lead us to infer that they were shallow-water forms?
What will be an ideal response?
The elpistostegalid fishes were dorsoventrally flattened (with the loss of the dorsal and anal fins); they had long snouts, perhaps indicating snapping in air rather than suction in water; and they had a powerful upper arm bone (humerus), indicating that they could prop their front end out of the water.
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This is a nephron process that results in a substance in blood entering the already formed filtrate
a) reabsorption b) filtration c) secretion d) excretion e) none of these choices
Endocrine gland stimuli include hormonal, ________, and ________ stimuli.
Fill in the blank(s) with the appropriate word(s).
The organelle involved in the production of energy is the ________.
A. mitochondria B. centriole C. cytoskeleton D. ribosome
When glucose enters a cell, it is phosphorylated to form __________
Fill in the blank(s) with the appropriate word(s).