Mammals are thought to be living descendants of which lineage?
a. lepidosaurs
b. anapsids
c. archosaurs
d. synapsids
Ans: d. synapsids
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In RNA editing:
A. spliceosomes change the base sequence of the primary transcript and therefore the protein for which it codes. B. different spliceosomes in different cells create different RNA sequences from the same primary transcript. C. enzymes change the base sequence of the primary transcript and therefore the protein for which it codes. D. different enzymes in different cells create different primary RNA transcripts from the same DNA sequence. E. a combination of spliceosomes and enzymes creates different primary RNA transcripts from the same DNA sequence.
You have crossed two Mexican hairless dogs, and the offspring are 1/3 hairy and 2/3 hairless. Given this phenotypic ratio, draw the Punnett square for this cross
What are the genotypes of the P1 and F1 dogs in this cross? List the predicted genotype as well as the phenotype for each of the offspring. Which genotypes are hairless, and which are hairy? Can you design a genetic cross that would yield a true-breeding hairless line (where all offspring are hairless)?
For coral reefs to form in tropical waters, it is necessary for the coral animals to live in symbiosis with:a
bacteria. b. parrot fish. c. zooxanthellae. d. sea urchins. e. kelp.
How does mineral mobility affect the symptoms of deficiency in plants?
a. Deficiency of a mobile nutrient usually affects older organs more than young ones b. Deficiency of a mobile nutrient usually affects younger organs more than older ones