$A$ group of cells similar in form,function,and origin is called:

Which of the following components are present in dry bones after burning?

Select the correct sequence of biological organization in complex animals.

From which germ layer do the glands of vertebrates originate?

Read the following statements about cockroach :
$(a)$ In male cockroach a characteristic mushroom shaped gland is present in the $6^{th}-7^{th}$ abdominal segments which functions as an accessory reproductive gland.
$(b)$ Cockroach is uricotelic.
$(c)$ The fat body and uricose gland help in excretion.
$(d)$ Blood from sinuses enter heart through ostia and is pumped anteriorly to sinuses again.
Which of the above statements are correct?

Identify the white blood cells.