The structure labeled as 2 in the accompanying figure is the:a
endoderm layer.
b. mesoderm layer.
c. blastopore.
d. blastocoel.
e. archenteron.
d
Biology & Microbiology
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Which of the RNAs act as an enzyme?
a. mRNA b. rRNA c. tRNA d. mRNA and rRNA e. none of the RNAs act as an enzyme
Biology & Microbiology
This animal is an amniote, lays eggs, has fur,
and nourishes her young with milk from glands. This animal is
a. a platypus. b. an opossum c. a cat. d. a lizard. e. more than one of these.
Biology & Microbiology
Alleles are described as ________
A) homologous chromosomes B) environmental factors that affect gene expression C) alternate versions of a gene D) alternate phenotypes
Biology & Microbiology
The epithelial tissue of animal cells is most similar to the ________ of plant cells?
A. ground B. dermal C. xylem D. vascular E. phloem
Biology & Microbiology