Zoology
In protozoans the nutrition is:
A.
Holophytic
B.
Saprozoic
C.
Holozoic
D.
All of these
Which of the following are exclusively marine?
A.
Difflugia
B.
Actinophrys
C.
Radiolaria
D.
Giardia
The formation of zygote by the fusion of two adult protozoans is known as:
A.
Autogamy
B.
Hologamy
C.
Syngamy
D.
Syzygy
Gregarine movement is exhibited by:
A.
Amoeba
B.
Monocystis
C.
Plasmodium
D.
Paramecium
Which of the following is noted for its luminescence?
A.
Giardia
B.
Volvox
C.
Noctiluca
D.
Trichomonas
Internal skeleton is found in:
A.
Granuloreticulosia
B.
Radiolaria
C.
Filosia
D.
Suctoria
Locomotor organelles are lacking in:
A.
Sarcodina
B.
Sporozoa
C.
Sarcomastigophora
D.
Ciliata
Which of the protozoan is considered as the connecting link between animals and plants?
A.
Entamoeba
B.
Paramecium
C.
Monocystis
D.
Euglena
Which one is odd among the following?
A.
Euglena
B.
Noctiluca
C.
Amoeba
D.
Arce Ila
Which of the following protozoans is an ectoparasite?
A.
Leishmania tropica
B.
Leishmania brassiliensis
C.
Trichomonas hominies
D.
Trichomonas gallinae
Albumen in a bird's egg is secreted by:
A.
Ovary
B.
Oviduct
C.
Vagina
D.
Cloaca
Respiratory apparatus in a sperm is called:
A.
Golgi Complex
B.
Mitochondria
C.
Lysosome
D.
Nucleus
In germ layers there is regrouping of cells within each germ layer to form various cell masses from which special organs are formed. This is attained mainly by three ways which are:
A.
Evagination, Invagination, Migration
B.
Epiboly, Involution, Invagination
C.
Invagination, Epiboly, Emboly
D.
Evagination, Involution, Migration
Epiboly is the:
A.
Morphogenetic movements occurring in the propective ectodermal blastomeres
B.
Morphogenetic movements occuring in the prospective endodermal blastomeres
C.
Morphogenetic movements of morula
D.
Morphogenetic movements of gastrula
The second cleavage plane of frog egg is:
A.
Meridional
B.
Vertical
C.
Equatorial
D.
Latitudinal
Biomolecular theory of activation of egg was proposed by:
A.
Leob
B.
Lovtrup
C.
R.S Lillie
D.
Heilbrunn
The fertilization membrane:
A.
Attracts more spermatozoa towards the egg
B.
Blocks the entrance of late arriving spermatozoa
C.
Protects the egg from injuries
D.
Acts as a semipermeable membrane
In mammals, when the eggs are released from the ovary, they are commonly encased in a layer of follicular cells, called:
A.
Cornea radiata
B.
Cornea malpighii
C.
Fertilization membrane
D.
Cortical membrane
Penetration of sperms through the plasma membrane of the eggs is achieved by:
A.
Physical activity of the sperm
B.
Mechanical activity of the sperm
C.
Mechanical activity of the egg
D.
Physio-chemical activity of the acrosome of the sperm
Chemical transmission of nerve impulses through synapsis is by the help of:
A.
ATP
B.
Acetylcholine
C.
Choline
D.
Pyruvic Acid
Mammals are said to have a "double circulatory system". This means that:
A.
The blood vessels are paired
B.
There are two systems one from the heart to the lungs and back to the heart and the second from rest of the body to the heart
C.
The blood circulates twice as quickly
D.
There are two types of blood vessels attached to every organ
Mammals have niconcave R.B.Cs. The physiological use for it is:
A.
To increase the surface area
B.
To decrease the surface area
C.
To accommodation the haemoglobin molecule
D.
Friction free movements through capillaries
If R.B.Cs are kept in hypertonic solution they will:
A.
Die without change in shape
B.
Dilate and may burst
C.
Retain the normal size
D.
Shrink in size
Respiratory quotient (R.Q.) means:
A.
Ratio of CO2 given off the O2 Consumed
B.
Volume of CO2 consumed
C.
Volume of CO2 consumed + O2 intake
D.
Volume of oxygen consumed + CO2 given off
The recombination of haemoglobin with oxygen in blood can be promoted by:
A.
Increasing oxygen concentration in the blood
B.
Decreasing oxygen concentration in the blood
C.
Increasing CO2 Concentration in the blood
D.
Increasing CO2 concentration in the blood