Answer the following statements true (T) or false (F)
1. Most plants transport sucrose over long distances through the xylem.
2. Vessels of the xylem are dead cells and therefore can transport water and minerals upward in the plant.
3. The Casparian strip prevents apoplastic movement through epidermal cells.
4. Plants that grow in salt marshes must have a mechanism for coping with potential osmotic stress in their cells.
5. When plants take up water and minerals these must pass through both a cell wall and a membrane.
1. FALSE
2. TRUE
3. FALSE
4. TRUE
5. TRUE
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An example of a purine is
A) thymine. B) guanine. C) acridine. D) cytosine. E) uracil.
Prosimians include
A. baboons. B. gibbons. C. lemurs. D. All of the answer choices are correct. E. No answer choice is correct.
Genetically modified crops have been produced mainly to benefit:
A) the scientific community. B) consumers. C) farmers. D) the United State's ability to export agricultural products.
Select all of the choices that apply to a gene carrier.
a. possesses but does not express the allele in question b. typically has a homozygous dominant genotype c. typically has a heterozygous genotype d. typically has a homozygous recessive genotype e. both possesses and expresses the allele in question