GENERAL HISTOLOGY

INTRODUCTION

CELL ORGANELLES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A worm turning away from light is an example of
A
reproducing
B
doing cellular respiration
C
having cells
D
responding to its environment
Explanation: 

Detailed explanation-1: -Answer: An earthworm turns away from light. Characteristic referred in this statement is Photophobia.

Detailed explanation-2: -Phototaxis is a kind of taxis, or locomotory movement, that occurs when a whole organism moves towards or away from a stimulus of light.

Detailed explanation-3: -Very low intensity elicits movement toward light, positive responses; moderate and high intensities elicit movement away from light, negative responses.

Detailed explanation-4: -Light-sensitive cells are scattered in their outer skin, mainly at the ends of their bodies. They allow earthworms to detect light and changes in light intensity. Earthworms don’t use a nose, mouth or lungs to breathe like we do.

Detailed explanation-5: -4. Worms do not have eyes, but they can sense light, especially at their front end. They move away from light, and will become paralyzed if exposed to light for too long (approximately one hour).

There is 1 question to complete.