Page 22 - SAAT BIOLOGY PART 1

SAAT BIOLOGY MR.MOHAMED ELGAYAR MRPROF.NET

• Compound eyes can detect the movements of prey,

mates, or predators, and also can detect colors. Simple

eyes can only distinguish between light and dark

Spiracles are used in respiration. A tympanum is part

of the auditory organ.

• Some spiders, such as wolf spiders and tarantulas

hunt prey. Other spiders catch prey in silken webs.

Webs are mainly built to capture prey. Many spiders

consume live pray.

• Adult insects feeding on a different food source than

larvae eliminates competition for the same food and

increases chances for survival if food is scarce. It limits

the range of foods an insect will feed on at any point in

its life cycle. If the larvae develop in an area where the

insect cannot live, than the larvae risk death upon

maturation.

MRPROF.NET MR.MOHAMED ELGAYAR MRPROF.NET@GMAIL.COM 21