What tissue in vascular plants would be used to move sugars from the roots to the stems and leaves?
a. phloem
b. sclerenchyma
c. xylem
d. parenchyma
Ans: a. phloem
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Indicate whether the statement is true or false.A vasectomy is a surgical procedure in which the vas deferens are severed, and then sealed with a laser. How would this cause sterility?
A. Sperm cannot be produced by meiosis. B. Sperm cannot be produced by mitosis. C. Sperm cannot move to the urethra. D. A man cannot get an erection. E. The testes stop producing testosterone.
Which of the following is NOT a product of cellular respiration?
Carbon dioxide Energy (ATP) Oxygen Water
An element in the second row of the periodic table that has four valence electrons would most likely _____.
A) form four covalent bonds B) have a full outer shell and be unreactive C) form ionic bonds D) be more electronegative than an element with six valence electrons in the same row of the periodic table