A common adaptation of coastal plants that grow on sand dunes is
A. deep roots to extract moisture.
B. broad leaves for enhanced photosynthesis.
C. secretion of proteinaceous threads.
D. increased transpiration of water.
E. elevated growth rates.
A. deep roots to extract moisture.
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Indicate whether the statement is true or false
Which of the following statements is the most accurate description of fruits and seeds?
A. "Fruits" and "seeds" are synonymous terms. B. Fruits always have fleshy coverings and seeds always have hard ones. C. Fruits are ripened ovaries containing seeds. D. Fruits have endosperm but seeds do not. E. All of the choices provided are incorrect.
Which of the following is true of both T cells and B cells?
A. They are effector cells against specific pathogens. B. They are produced from stem cells of the bone marrow. C. They can help attack and destroy invading pathogens. D. They typically have a short life span. E. All of these statements are true.
Four of the five choices listed below are haploid
Select the exception. a. gametophyte b. zygote c. sperm d. microspore e. gamete