To which superfamily of transposons is RAG1 related?

A. Merlin
B. Banshee
C. Maverick
D. Transib
E. Tc1/mariner


D

Biology & Microbiology

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Is the phenotype of an organism controlled by its genotype?

a. Yes b. No

Biology & Microbiology

On a field trip, a student in a marine biology class collects an organism that has differentiated organs, cell walls of cellulose, and chloroplasts with chlorophyll a. Based on this description, the organism could be a brown alga, a red alga, a green alga, a charophyte recently washed into the ocean from a freshwater or brackish water source, or a land plant washed into the ocean. The presence of which of the following features would definitively identify this organism as a land plant?

A) alternation of generations B) sporopollenin C) rosette cellulose-synthesizing complexes D) flagellated sperm E) embryos

Biology & Microbiology

In humans, where does fertilization occur?

A. in the vagina B. in the fallopian tubes C. externally D. in the ovary

Biology & Microbiology

When a plasma membrane allows some substances through but not others, it is ________ .

a. nonpolar b. polar c. able to use active transport d. selectively permeable e. diffusible

Biology & Microbiology