The Meselson-Stahl experiments supported the model of dispersive DNA replication
Indicate whether the statement is true or false
FALSE
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What is the genotype of the wild-type mother of these progeny?
In Drosophila, the autosomal recessive pr and cn mutations cause brown and bright-red eyes, respectively (wild-type flies have brick-red eyes). Flies who are homozygous recessive at both pr and cn have orange eyes. A female who has wild-type eyes is crossed to an orange-eyed male. Their progeny have the following distribution of eye colors:
A) pr cn / pr+cn+
B) pr+cn / pr+cn
C) pr+cn / pr cn+
D) pr cn+ / pr cn+
E) pr cn / pr cn
Types of Symbiosis
What will be an ideal response?
Repolarization of a postsynaptic cell can occur when:a
there is a high enough concentration of neurotransmitters in the synaptic cleft. b. neurotransmitters undergo exocytosis from the presynaptic cell. c. enzymes degrade neurotransmitters in the synaptic cleft. d. neurotransmitters are not removed from their receptors. e. neurotransmitters undergo reuptake at the postsynaptic cell
Which description applies to individuals who are well adapted for a particular environment?
A) They may or may not be equally fit in another environment. B) They are the best fit for all other environments. C) They are at a disadvantage in other environments. D) They will mutate to become fit in other environments.