Which animal, A, B, C, D, E, or F, has a nervous system feature referred to as a dorsal nerve cord?
1.A
2.B
3.C
4.D
5.E
6.F
6
Biology & Microbiology
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What role did cyanobacteria play in shaping Earth’s environment?
a. They are single-celled organisms that are detritivores. b. They produced oxygen, which led to changes in Earth’s atmosphere. c. They evolved into the first plants that colonized land. d. They are the ancestral form of all life on Earth
Biology & Microbiology
Which of the following events happens during the Calvin Cycle (light independent) stage of photosynthesis?
Biology & Microbiology
How many nucleotides form the code for one amino acid?
A. 2 D. 5 B. 3 E. 6 C. 4
Biology & Microbiology
The endoplasmic reticulum is composed of flattened sacs called ________.
A. cisternae B. thylakoids C. vacuomes D. cristae
Biology & Microbiology