Dense connective tissue is indicated by the letter ____
a. A
b. B
c. C
d. D
e. E
ANSWER: d
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In a dihybrid cross with independent assortment of the two genes, any deviation from the Mendelian 9:3:3:1 ratio indicates that the phenotype is the product of the interaction of two or more genes
Indicate whether the statement is true or false
The stone tools and the dentition of Homo habilis indicate that early humans were
A. strictly carnivores. B. omnivores that could either scavenge or hunt for meat. C. strictly scavengers. D. strictly herbivores.
People who have phenylketonuria, a genetic disorder, are unable to break down the amino acid phenylalanine so that it can be used in cellular respiration. Yet they need phenylalanine in their diet. Why do they need to eat some foods with phenylalanine?
A) Amino acids yield the most energy per gram, so they need phenylalanine to supply their cells with energy. B) Amino acids are used to build proteins and so they need enough phenylalanine for biosynthesis without any leftover that needs to be broken down to enter cellular respiration. C) Cellular respiration can use proteins more readily than other types of molecules, so the amino acid phenylalanine is essential.
The (codon/anticodon/loop) of a transfer RNA molecule is complementary to a codon in a messenger RNA molecule
What will be an ideal response?