Which of the following is a membranous organelle that chemically modifies and ships proteins to other organelles or out of the cell?
A) chloroplast B) mitochondria C) lysosome D) Golgi complex
Answer: D
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Which of the following are the most advanced seedless vascular plants because of their large leaves and branching roots?
a. Ferns b. Horsetails c. Club mosses d. Hornworts
DNA molecules contain protein coding
sequences called
a. genotypes. b. genomes. c. nucleotides. d. genes. e. ribonucleic acids
Plasmids are used as vectors in plant and bacterial genetic engineering. However, there is a major difference in the fate of genes introduced into bacteria on most bacterial plasmids and into plants on tumor-inducing (Ti) plasmids
What is this difference? A) In bacteria, genes are stably expressed; in plants, gene expression is always lost quickly. B) Gene expression tends to decrease rapidly and unpredictably in bacteria; gene expression is much more stable in plants. C) Bacterial plasmids are circular DNAs; Ti plasmid DNA is linear. D) Bacterial plasmids and the genes they carry usually are not integrated into the chromosome; Ti plasmids and the genes they carry are integrated into the chromosome.
C4 plants have better water conservation abilities than many other plants (especially C3). This is because:
A) C4 plants have smaller stomata that are protected by hairs and pits. B) C4 plants have the ability to obtain CO2 without opening their stomata. C) C4 plants open their stomata at night. D) C3 plants are able to keep their stomata closed during the day. E) C4 plants have no leaves; they use their stems for photosynthesis.