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
When the two ecosystems overlap each other, the area is called
habitat
niche
ecotone
ecotype
C.
ecotone
Ecotone is a zone of transition presenting a situation of special ecological interest between two different types of communities (ecosystems).
Ecological niche of an organism includes the physical space occupied by it, its functional role in community, ie, trophic level and position in environment gradients of temperature, pH, soil etc.
Pyramid of energy in ecosystems is
always upright
always inverted
mostly upright
mostly inverted
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