Which statement is FALSE?
A. A placode is a thickening of neuroepithelium.
B. Placodes give rise to special sensory structures.
C. There is a Lens Placode and an Otic Placode.
D. The tympanic membrane is an example of a non-neural structure which arises from a placode.
E. Placodes are thickenings of neural crest-like cells that remain in surface ectoderm.
Answer: D. The tympanic membrane is an example of a non-neural structure which arises from a placode.
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How do bryophytes obtain water and CO2?
A. They obtain CO2 only through stomata and water through their roots. B. They obtain water through their stomata and CO2 through roots. C. They absorb both CO2 and water directly from the environment, without passing through stomata or roots. D. They have difficulty absorbing water and CO2 due to their thick, waxy cuticle. E. They live in moist environments, so they do not need to absorb water or CO2.
Light behaves as a stream of discrete particles called ________, each carrying a ________ (indivisible packet) of energy.
Fill in the blank(s) with the appropriate word(s).
Identical twins are genetically the same but do not always look or act exactly alike. Propose a hypothesis to explain this
What will be an ideal response?
The general term that describes the uptake of oxygen from the environment and the disposal of carbon dioxide at the body system level is
A. respiration. B. secretion. C. inspiration. D. exhalation. E. circulation.