Ascaris is characterised by
the absence of true coelom but the presence of metamerism
the presence of neither true coelom nor metamerism
the presence of true coelom but the absence of metamerism
the presence of true coelom but the absence of metamerism
B.
the presence of neither true coelom nor metamerism
Ascaris is an endoparasite of man. It inhabits the small intestine more frequently of children than of adults. the body is elongate, cylindrical and gradually tapering at both ends. There is no metameric segmentation. In Ascaris between the body wall and Visceral organs is a spacious fluid filled cavity. This cavity is not true coelom as it is not lined by coelomic epithelium, has no relation with reproductive and excretory organs and develops from blastocoel. This body cavity is referred pseudocoel.
Consider the following four statement (A-D) about certain desert animals such as kangaroo rat
A) they have a dark colour and high rate of reproduction and excrete solid urine.
B) they do not drink water, breathe at a slow rate of conserve water and have their body covered with thick hairs.
C) they feed on dry seeds and do not require drinking water.
D) they excrete very concentrated urine and do not use water to regulate body temperature.
Which two of above statement for such animals are true?
C and D
B and C
C and A
C and A
Quercus species are the dominant component in
temperature deciduous forests
alpine forests
scrub forests
tropical rain forests
Which one of the flowing is the correct percentage of the two (out of the total of 4 ) green-house gases that contribute to the total global warming?
CFC 14%, CH4 20%
CO2 40% CFCs 30%
N2O 6%, CO2 86%
N2O 6%, CO2 86%
Given below is a diagrammatic cross section of a single loop of the human cochlea.
diagram
Which one of the following options correctly represents the names of three parts?
C :Endolymph
D : Sensory hair cells
A: Serum
D: Sensory hair cells
A: Endolymph
B: Tectorial membrane
D: Sensory hair cells
A: Endolymph
B: Tectorial membrane
World summit on sustainable development (2002) was held in
Brazil
Sweden
Argentina
Argentina
Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the abiogenic origin of life?
They were able to reproduce
They could separate combinations of molecules from the surroundings
They were partially isolated from the surroundings
They were partially isolated from the surroundings
