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

Biology & Microbiology

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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?

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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

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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.

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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

Biology & Microbiology