The symmetrical pattern of yolk distribution in a sea urchin represents the beginnings of radial
symmetry.
Indicate whether the statement is true or false.
T
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The connection between a particular organism and a specific disease was first made by
A. Jenner. B. Pasteur. C. Koch. D. Leeuwenhoek.
Describe the life cycles of animals, plants/some fungi, and other fungi/algae with respect to the amount of time each
type of organism spends in their haploid and diploid phases. Also indicate whether those haploid and diploid phases are unicellular or multicellular.
What will be an ideal response?In insects, air enters through a ____ and is delivered to interstitial fluid
a. spicule b. spiracle c. stoma d. foramen e. gill
Which of the following is considered a likely explanation for the events of the Cambrian explosion?
A) Complex predator-prey relationships and increased atmospheric oxygen levels promoted animal diversification. B) A great surge of volcanic activity was triggered by significant movements of the continental plates and possibly by an asteroid impact. C) Solar flares led to increased UV radiation intensity, which in turn promoted a high rate of mutation. This led to rapid diversification of animals. D) The massive growth of swamp vegetation depleted the atmosphere's carbon dioxide and eventually cooled the Earth's climate.