Answer in one word or one line. (i) Give the common name of Periplaneta americana. (ii) How many spermatheca are found in earthworms? (iii) What is the position of ovaries in a cockroach? (iv) How many segments are present in the abdomen of cockroaches? (v) Where do you find Malpighian tubules?

Haritha,Subject Matter Expert at Edumarz

Solution:

(i) Periplaneta americana is commonly called as American cockroach

(ii)There are four pairs of spermatheca present in earthworm

(iii) The female reproductive system of cockroach contains two large ovaries,situated laterally in the 2nd – 6th abdominal segments of the body

(iv)The abdomen of cockroach is formed of 10 segments

(v) Malpighian tubules are located at the junction of midgut and hindgut.

COCKROACH

The colour of cockroach is generally brown or black.It is included in the class Insecta present in the phylum Arthropoda.In tropical regions,bright yellow, red and green coloured cockroaches are also reported.The size of cockroaches ranges from ¼ inches to 3 inches.They also contain long antennae and legs.They generally live in damp places all over the world.

Morphology

Presence of segmented body
Body is divided into three regions-head,thorax and abdomen and divisible
Exoskeleton of cockroach is formed of chitin
Hardened plates present on the exoskeleton are called as sclerites
Presence of triangular head formed by six fused segments
A pair of compound eyes present in head capsule
Anterior region of the head contain appendages that forms biting and chewing type of mouth parts