Which of the following is not true concerning the structure labeled 2 in Figure 35-2?
a. It is known as periderm.
b. It is produced by cork cambium (not shown).
c. It is composed largely of primary tissue.
d. It is composed largely of cells that are dead at maturity.
e. It is commonly called outer bark
C
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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.
In this diagram, mitotic spindle microtubules have attached to the sister chromatids at their kinetochores. In which phase of mitosis do the microtubules attach to the kinetochore?
a. prophase
b. metaphase
c. prometaphase
d. telophase
Which property is not common to all living things?
1.DNA is found inside a nucleus. 2.DNA directs growth and reproduction. 3.The ability to obtain nutrients and energy. 4.The ability to detect and respond to internal and external changes.
The system of tubes and sacs that makes enzymes,
proteins and lipids is(are) the a. Golgi bodies. b. ribosomes. c. vesicles. d. lysosomes. e. endoplasmic reticulum.