Which one of the following is the most primitive ancestor of man?

• Homo habilis

• Australopithecus

• Ramapithecus punjabicus

• Homo neanderthalensis

A female Anopheles mosquito can be recognised by

• proboscis and palpi are long and more or less of equal length

• proboscis long and palpi short

• proboscis short and palpi long

• Both proboscis and palpi are short

73.

The anterior V-spot in microfilaria of Wuchereria represents

• nerve ring

• cervical papilla

• excretory system

• reproductive system

In a population, unrestricted reproductive capacity is called

• biotic potential

• fertility

• carrying capacity

• birth rate

When the two ecosystems overlap each other, the area is called

• habitat

• niche

• ecotone

• ecotype

Pyramid of energy in ecosystems is

• always upright

• always inverted

• mostly upright

• mostly inverted

Which one of the following is mainly responsible for green houses effect?

• SO₂

• CO₂

• CO

• O₂

Which one of the following is an exotic carp species?

• Barbus stigma

• Cyprinus carpio

• Labeo bata

• Cirrhinus mrigala

Which of the following two hormones are essential for induced breeding of fishes?

• TSH and ACTH

• Oestrogen and progesterone

• FSH and LH

• Vasopressin and oxytocin

Which stage of malarial parasite is infective to man?

• Gametocyte

• Merozoite

• Cryptomerozoite

• Sporozoite