The observation that schizophrenia is associated with duplications of a certain copy number variant (CNV), while autism spectrum disorders are associated with deletions of the same CNV, suggests that _____
a. CNV mutations are present in all psychiatric disorders
b. both disorders have identical phenotypes
c. both disorders have an environmental component
d. both disorders share common developmental pathways
e. neither disorder has a genetic component
d
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The coronary arteries supply blood to the heart muscles. Which of the following events would occur in heart tissue following a heart attack due to a block in the coronary arteries? Circle all correct answers
What will be an ideal response?
A mutation in a tRNA gene could potentially decrease the ability of that tRNA to (select all that apply):
A. complex with ribosomes. B. bind to an amino acid. C. bind multiple amino acids simultaneously. D. control DNA replication. E. code for protein.
Answer the following statements true (T) or false (F)
1. The cell is the basic structural/functional unit common to all living organisms. 2. Resolution, contrast, and magnification are three important parameters in microscopy. 3. Fluorescence microscopy enables researchers to label and visualize a particular type of cellular protein or organelle. 4. The flagellum is used for cell motility in eukaryotes only.
Researchers studying guppies in Trinidad found that guppies, in streams with high predation, reproduce earlier and more frequently. How would the scientists describe the selective force acting on the guppy population?
A. r-selection B. sexual selection C. density-dependent factors D. density-independent factors E. K-selection