Most plant dry mass originates from:

A. oxygen
B. chlorophyll
C. carbon dioxide
D. water
E. soil minerals


C. carbon dioxide

Biology & Microbiology

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When the optic vesicle contacts overlying ectoderm, developmental events are induced, leading to ____ in the

developing lens.

a. crystallin and keratin synthesis b. crystallin synthesis c. keratin synthesis d. degradation of crystalline and keratin e. apoptosis

Biology & Microbiology

Natural killer cells can kill infected or abnormal cells by the release of ________, which form pores in the target cell's membrane.

A) interferons B) fragmentins C) perforins D) antibodies E) complement proteins

Biology & Microbiology

An Rh-positive baby can cause an Rh-negative mother to produce antibodies against the Rh antigen. When is this a problem?

What will be an ideal response?

Biology & Microbiology

Golgi tendon organs are a type of cutaneous receptor for touch.

Answer the following statement true (T) or false (F)

Biology & Microbiology