Darwin’s experiments on phototropism illustrated that ____
a. plant stems bend away from bright lights
b. signals from plant roots control phototropism
c. an opaque cap placed over a shoot tip will cause a plant to bend toward light, but will inhibit growth
d. a translucent cap placed over a shoot tip will cause a plant to bend toward light, but will inhibit growth
e. a translucent cap placed over a shoot tip will cause a plant to both grow and bend toward light
ANSWER: e
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Any source of information can be used to evaluate a scientific theory
1.True 2.False
Cilia and flagella are both made of ________
A) actin B) tubulin C) intermediate proteins D) phospholipids
Stemonitis is a slime mold. Which of the following is it most closely related to?
a. a fungus b. a plant c. a slug d. an amoeba
The earliest microbial fossils that have been found are dated from approximately 4.5 million years ago.
Answer the following statement true (T) or false (F)