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
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
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
B.
CO2
Green house effect refers to selective energy absorption by CO, in the atmosphere which allows short wavelength energy to pass through but absorbs longer wavelength and reflects heat back to earth. It is caused by carbon dioxide, methane, nitrogen dioxide and water vapour.
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