Angela would like to look at living algae from pond water. What type of equipment should she use?
A. her naked eye
B. magnifying glass
C. transmission electron microscope
D. compound light microscope
E. scanning electron microscope
Answer: D
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Both DNA and RNA can store information, yet DNA is the major information storage molecule in most cells. What are the advantages of using DNA for information storage instead of RNA? Select all that apply.
_____ DNA strands are more stable than RNA strands. _____ It frees up RNA for enzymatic functions. _____ DNA can make proteins directly and RNA cannot. _____ Reverse transcriptase could occur, allowing DNA to make RNA.
Cell shape is reinforced by ____
a. phospholipids
b. DNA c. cytoskeletal filaments d. transport proteins e. ribosomes
Refer to the accompanying figure. What is the structure labeled as 6?
a. anus
b. gills
c. cilia
d. mouth
e. digestive tract
What are the tissues of a leaf, from the upper surface to the lower surface?
a. epidermis, periderm, epidermis b. epidermis, palisade mesophyll, spongy mesophyll, epidermis c. xylem, palisade mesophyll, spongy mesophyll, phloem d. epidermis, spongy mesophyll, palisade mesophyll, epidermis e. dermis, spongy mesophyll, palisade mesophyll, dermis