Speciation is more likely to happen when there is significant gene flow between populations.
a. true
b. false
Answer: b. false
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After mutagenesis and screening, you have found a mutant that is able to grow in soil with high salt content. Chemical analysis showed that this plant has a decreased amount of Na+ relative to normal plants
What kind of mutation do you predict this plant contains? A) mutation in the plasma membrane sodium channel B) mutation in the metallothioneins C) mutation in the tonoplast sodium channel D) mutation in the tonoplast antiporter
Which of the following is not correct concerning the initiation of bacterial replication?
A. It involves a region of the DNA called oriC B. DNA proteins bind to the DNA to begin separation of the strands C. The strands are initially separated at GC-rich regions of DNA D. Following initial separation, DNA helicase enzymes continue to unwrap the DNA
Which of the following statements is false?
a. Neurons in the brain can interpret incoming action potentials only in certain ways. b. Optic nerve impulses can only be interpreted as light. c. Sensory neurons do not follow the all-or-none law. d. The stronger the stimulus, the more action potentials are generated. e. A strong stimulus activates many adjacent receptors, thereby increasing the number of action potentials and the level of awareness for the stimulus.
Short sequences of nucleotides (typically 4 to 8 bases) that are repeated a variable number of times at a locus are known as ________. [three words]
Fill in the blank(s) with correct word