Tobacco plants have had a gene from fireflies inserted into them which makes them glow. These tobacco plants would be considered:
A) mutants. B) vectors.
C) transgenic organisms. D) clones.
Answer: C
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Some plants are able to endure frequent flooding events because they contain a tissue with loose parenchyma cells and large air spaces called
A. xylem. B. spongy mesophyll. C. pneumatophores. D. aerenchyma. E. epidermal tissue.
The __________ gives rise to muscles, bones, and the circulatory system
a. endoderm b. ectoderm c. mesoderm d. blastopore e. mesoglea
In meiosis in females, only one haploid cell develops into an egg. The remaining haploid products of meiosis are ________, which usually degenerate
Fill in the blank with correct word.
Among the following choices, the most concentrated urine is excreted by _____
A) frogs B) kangaroo rats C) humans D) freshwater bass