The cell walls of fungi are made up of
a. proteoglycans
b. phospholipids
c. cellulose
d. collagen
e. chitin
Ans: e. chitin
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Daily humidity levels in the tropical wet forest are so high that some plants have evolved that grow on other plants, gathering their water from the rainfall and the air around them. What are these plants called?
a. saprophytes b. caprophytes c. epiphytes d. neophytes
____ are examples of trace fossils
a. Skeletons b. Shells c. Seeds d. Footprints e. Leaves
Which of the following statements is TRUE?
a. Each new cell receives half of the number of chromosomes in the original cell. b. Each new cell receives copies of all the original chromosomes. c. If the original number of chromosomes was 46, each new cell will have 23. d. The sister chromosomes are not identical due to breakages in the DNA. e. All chromosomes are duplicated except the sex chromosomes.
An element has 8 protons, 9 neutrons, and 8 electrons. Its atomic number and atomic mass, respectively, are _________.
Fill in the blank(s) with the appropriate word(s).