Below are models of two types of cells. Which of the following structures are common to both cell types? A. mitochondria and vacuoles
B. mitochondria and cell wall
C. vacuoles and chloroplasts
D. cell wall and chloroplasts

Select the correct answer from each drop-down menu proteins are

Which statement describes compounds a. compounds are made of one type of atom. b. compounds cannot be represented by models. c. compounds are represented by chemical formulas. d. compounds cannot be broken down into simpler forms.

Which of these statements is true about autotrophs, but not heterotrophs? a. they use sugar and oxygen to make carbon dioxide and water.b. they use chlorophyll and oxygen to make carbon dioxide and water.c. they use sunlight, water, and carbon dioxide to make sugars.d. they use sunlight, water, and oxygen to make chlorophyll.