Companion cells load most of the carbohydrates into sieve tube members ____
a. through plasmodesmata
b. by osmosis
c. by antiport
d. through carrier proteins
e. by symport
ANSWER: a
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Cancer is often the results mutations that involve ________.
A. Genes in the mitotic spindle B. Proto-oncogenes mutating and becoming oncogenes C. Oncogenes mutating and becoming proto-oncogenes D. Both proto-oncogenes and oncogenes mutating
Epigenetic mechanisms of gene regulation involve: (Select all correct choices)
A. changes to DNA sequences. B. the way in which DNA is packaged within chromosomes. C. the way in which chromosomes are organized into genomes.
What is the relationship between the narrow-sense heritability (h2 ) index and the impact of selection?
What will be an ideal response?
Plants produce ________ by mitosis and ________ by meiosis
Fill in the blank(s) with correct word