Which is NOT a member of phylum Ascomycota?
a. morels
b. yeast
c. the black bread mold.
d. truffles
e. powdery mildews
C
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Free ________ molecules have lubricating properties and are therefore abundant in the joints, for example.
Fill in the blank(s) with the appropriate word(s).
Which of the following is not a property of homologous chromosomes?
A) They pair physically during prophase of meiosis I. B) They exchange genes by crossing over during meiosis. C) They carry alleles for the same genes at the same chromosomal position. D) Their centromeres are attached to each other during G2 of the cell cycle. E) They segregate to opposite poles at anaphase of meiosis I.
Cells that are the main water-conducting cells of a
plant are a. sclereids. b. tracheids. c. sieve tubes. d. parenchyma. e. all of these.
The nervous system is to the ectoderm as the skeleton is to the
A. allantois. B. chorion. C. endoderm. D. blastula. E. mesoderm.