AP BIOLOGY

PLANTS

PLANT REPRODUCTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Why is a spider spinning a web an instinct?
A
It learns how to spin the web from its mother.
B
It learns how to spin a web through insight learning.
C
It is born knowing how to spin a web.
D
It learns how to spin a web through observational learning.
Explanation: 

Detailed explanation-1: -Instinct is a type of animal behaviour that need not be learned. A spider does not learn how to spin its web. It is born with the knowledge of web spinning. So, it is an instinctual behaviour.

Detailed explanation-2: -An instinct is the ability of an animal to perform a behaviour the first time it is exposed to proper stimulus. The main reason spiders spin webs is to catch their food. When an insect, such as a fly, flies into a spider’s web, it gets stuck on the sticky threads.

Detailed explanation-3: -How do spiders learn to make such complex geometrical patterns? Making webs is instinctive for spiders, which means nobody has to teach them how to do it. They are born knowing how. When a spider begins a web, it releases a silk thread.

Detailed explanation-4: -They don’t have to learn how-they just know. Babies of some spider species build round “orb” webs, others build tangled or funnel-shaped webs, and others don’t build webs at all. Spiders such as wolf spiders and jumping spiders never build webs, and pursue their prey on foot instead.

Detailed explanation-5: -Spider Physiology and Behaviour Spiders, having minute brains, were once considered simple, instinct-driven automatons, but research on spider biology is revealing increasing evidence of their cognitive abilities.

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