What would be an easy way to determine if a skull is a mammal's skull?
A. Examine the teeth.
B. Look for the remains of the tympanum.
C. Look for air sacs in the skull.
D. Measure the brain case volume.
Answer: A
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Taxonomic separation into fungal phyla is based on
a. sexual reproduction, or lack thereof. b. whether the fungus is a parasite or saprophyte. c. the production of certain metabolites, like citric acid. d. the edibility of the fungus.
Plant growth regulators _____
A) only act by altering gene expression B) often have a multiplicity of effects C) function independently of other hormones D) affect the division and elongation, but not the differentiation, of cells
Which cells are alive at maturity?
A. Sieve elements B. Vessel elements C. Tracheids D. Vessel elements and tracheids E. Sieve elements and vessel elements
A heterozygote could have a variety of phenotypes depending on whether or not the mutation is recessive, dominant, or haploinsufficient. In this example, the gene A is necessary to form a tail in mice. If the mouse is a heterozygote (A/a), then what
would you predict the phenotype to be if the mutation was recessive, dominant, or haploinsufficient. What will be an ideal response?