Which of the following is the purpose of using a control groups in an investigation?
a) to establish a standard for data comparison
b) to provide the correct answer to an investigation
c) to determine the dependent variables
d) to function as a third variable group
Answer: a) to establish a standard for data comparison
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According to the old Linnaean scheme of classifying the living world into either animals or plants, any organism that could photosynthesize was considered a plant. What kingdoms in the new system contain photosynthetic organisms and what criteria are now used to group them?
What will be an ideal response?
On what foodstuff does the main enzyme in the
mouth act?
a. proteins b. fats c. carbohydrates d. fats and carbohydrates e. carbohydrates and proteins
Which of the following is TRUE at the end of
telophase I in corn (20 chromosomes)? a. Each cell has 10 chromosomes. b. Each chromosome is double-stranded. c. Centromeres connect sister chromatids. d. Each cell has 10 chromosomes, and each chromosome is double-stranded. e. Each cell has 10 chromosomes, each chromosome is double-stranded, and centromeres connect sister chromatids.
The structural integrity of bacteria is to peptidoglycan as the structural integrity of plants is to _____
a. lignin b. cellulose c. chitin d. sporopollenin e. secondary compounds