What acidic, absorbent bryophyte is used as an additive to planting mixes to help soil retain moisture?

a. peat moss
b. liverwort
c. hornwort
d. club moss
e. cap moss


a

Biology & Microbiology

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Which of the following correctly matches a cell or group of cells with its ability to differentiate into different specialized cells? (Select all correct choices.)

A. fertilized egg: pluripotent B. mesoderm: pluripotent C. endoderm: multipotent D. fertilized egg: multipotent E. ectoderm: totipotent

Biology & Microbiology

The stretch reflex

a. is an adaptation that enables humans to hold objects steadily for extended periods if time. b. is activated by stretch-sensitive receptors inside the muscle spindles. c. is a simple, stereotyped, and repeatable motor action. d. is elicited by a sensory stimulus. e. all of these

Biology & Microbiology

What is the fluid-filled sac within the inner membrane of a chloroplast called?

a. grana b. lumen c. stroma d. thylakoid e. electron acceptor

Biology & Microbiology

Which one of the following is NOT required for photosynthesis to take place? 

A. enzymes B. ATP C. oxygen D. carbon dioxide

Biology & Microbiology