Spawning is when fish release their
A) sperm and eggs
B) gametes
C) excretions
D) waste matter
Ans:
A) sperm and eggs
B) gametes
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Molecular studies point to the order Zygnematales, whose modern representatives include ____, as the sister clade of all
land plants.
a. Equisetum b. Plasmodium c. Marchantia d. Spirogyra e. Giardia
The function of the phloem companion cells is to
a. assist vessel members to move organic substances. b. supply potassium ions for water absorption. c. help load organic compounds into neighboring sieve tubes. d. store the organic compounds transported by the sieve tubes. e. help transport organic compounds when the sieve tubes become overloaded.
Identifying an autosomal recessive mutation in a mutagenic screen in Drosophila requires identification of a mutant in the F3 generation. If testing for a sex-linked recessive lethal mutation (e.g
, cn l + using a balancer chromosome such as cnCyO), in which generation can lines with mutations be identified?
Assume that you have cut ? DNA with the restriction enzyme HindIII. You separate the fragments on an agarose gel and stain the DNA with ethidium bromide. You notice that the intensity of the stain is less in the bands that have migrated closer to the
"+" pole. Give an explanation for this finding. What will be an ideal response?