As xylem tissue is forming, its still-living cells deposit secondary wall material on the inner surface of their primary wall, but do not cover over the ____
a. perforation plates
b. pits
c. pectins
d. vessel elements
e. plasmodesmata
e
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Which of the following is the earliest step in blood filtration in the human body?
a. Water is collected in larger tubules and leaves the kidney in the ureter. b. Blood passes through the tubules in the glomerulus. c. Blood comes in contact with the nephrons. d. Water, required ions, and useful compounds are absorbed into the capillaries.
Four of the following are true about water molds. Which one is the exception?
a. Water mold is responsible for the Irish potato famine. b. Some species are aquatic parasites. c. Most act as decomposers. d. Their filaments are composed of haploid cells. e. They are heterotrophs.
Imagine a newly discovered biological molecule that is mostly hydrophobic in its structure. How would this new molecule be classified?
A) carbohydrate B) lipid C) nucleic acid D) protein
The adrenal cortex provides a slower but long-term stress response in comparison to the adrenal medulla.
Answer the following statement true (T) or false (F)