The endosymbiosis hypothesis is supported by all of the following pieces of evidence except the fact that
A) mitochondria have circular DNA like prokaryotes.
B) mitochondria lack ribosomes like prokaryotes.
C) chloroplasts have ribosomes like prokaryotes.
D) chloroplasts reproduce through a splitting process like certain prokaryotes.
Answer: B
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In Mendel's experiments on seed color in pea plants, when a dominant yellow seed-bearing plant was crossed with a recessive green seed-bearing plant, what was the approximate phenotypic ratio among the F2 generation?
A. 1 yellow: 3 green B. 1 yellow: 1 green C. 3 yellow: 1 green D. all yellow E. 9:3:3:1
Which one of the following is the function of horizontal cells in the eye?
A. They transmit signals from rods and cones to the optic nerve. B. They receive signals from multiple photoreceptors (rods and cones), integrating and regulating their input. C. They communicate between and among bipolar cells. D. They process of visual input to actually form an image.
Which of the following is an enzyme used in cloning that breaks covalent bonds?
A. DNA ligase B. restriction endonuclease C. reverse transcriptase D. DNA polymerase I E. polynucleotide kinase
________ are large-scale communities in which the vegetation is determined by long-term patterns of temperature and precipitation
Fill in the blank(s) with correct word