Gastrulation leads to the development of what?
a. three distinct germ layers
b. two distinct germ layers
c. one distinct germ layer
d. polar bodies
a. three distinct germ layers
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True or False: Meiosis halves the chromosome number, whereas mitosis maintains the same chromosome number
A. true B. false
Answer the following statements true (T) or false (F)
1. A bacterial infection such as pneumonia is most likely caused by organisms derived from the animal kingdom. 2. All genetic mutations are harmful to an organism. 3. Vertical evolution, whereby living organisms evolve from a common ancestor ("tree of life"), is the only mechanism of evolution on Earth. 4. The effects of a genetic mutation are always limited to simply a change in DNA sequence with little consequence on the proteins expressed. 5. The proteome, rather than genome, is most directly responsible for the structure, function, and appearance of organisms.
Which of the following conditions is identified by the release of histamine and serotonin?
a. ragweed hypersensitivity b. HIV/AIDS c. rheumatoid arthritis d. dermatitis
Quats, similar to those found in Lysol, are not effective against endospores and prions.
Answer the following statement true (T) or false (F)