Structural Organisation in Plants and Animals
Structural Organization in Animals
Mammary glands are modified
The given figure represents posterior region of male cockroach. Indentify the parts labelled as A,B,C and D
Consider the following four statements (i) - (iv) and select the correct option stating which ones are true (T) and which ones are false (F)
(i) In male cockroach, genital pouch or chamber lies at the hind end of abdomen bounded dorsally by 9th and 10th terga and ventrally by the 9th sternum.
(ii) In cockroach, the haemolymph is composed of colourless plasma and haemocytes
(iii) In female cockroach each ovary is formed of a group of ten ovarian tubules or overioules, containing a chain of developing ova
(iv) In cockroach the nymph grows by moulting about 13 times to reach the adult form.
Read the following statement and select the correct option
Statement 1 : Bone and cartilage are rigid connective tissues
Statement 2 : Blood is a connective tissue with fluid (plasma) matrix.
Enzyne collagenase breaks the peptide bonds present in collagen protein. Excessive seretion of this enzyme will lead to weakening of which of the following body parts ?
(iii) Hair shafts
(iv) Nails and claws
(v) Intervertebral discs
Study the given figure of reproductive system of male cockroach
In which of the labelled parts are sperms stored ?