Give reasons for cockroach can easily and quickly sence presence of food and slight movement
Answers
Explanation:
Cockroaches are insects, flattened from top to bottom, usually with two pairs of
wings folded flat over the back (Fig. 5.1). Most species rarely fly but they walk very
fast. The colour usually varies from light brown to black. The species vary from 2–
3mm to over 80mm in length.
Of over 3500 identified species only a few are of importance to people because
they have adapted to living in buildings. The most common species are:
• Periplaneta americana, the American cockroach, which occurs around the
world. It is 35–40mm in length and is a shiny reddish to chocolate brown
colour (Fig. 5.2a). The egg case measures 8–10mm and contains 16 eggs.
• Periplaneta australasiae, the Australian cockroach, which occurs mainly in
tropical and subtropical areas. It is similar to the American cockroach, but
smaller (31–37mm long) and darker (Fig. 5.2b). It has a pale yellow stripe
on each forewing extending for about one-third its length. The egg case
contains about 22–24 eggs.
• Blatta orientalis, the Oriental cockroach, found mainly in cool temperate
regions. It is blackish and 20–27mm long (Fig. 5.2c). The egg case is 10–
12mm long and contains 16–18 eggs.
• Supella longipalpa, the brown-banded cockroach, which occurs around the
world. It is 10–14mm long and has yellow and brown bands (Fig. 5.2d). The
egg case is 4–5mm in length and contains about 16 eggs.
• Blattella germanica, the German cockroach, found in most parts of the world.
It is light yellowish brown and 10–15mm in length, making it one of the
smallest domestic cockroaches (Fig. 5.2e). The female usually carries the egg
case until shortly before the young come out. The egg case is light in colour,
about 7–9mm long and contains about 40 eggs
Answer:
cockroach cab easily and quickly sence presence of food and slight movements