1 million years ago
500 million years ago
1 billion or 1000 million years ago
3 billion years ago
proliferation of WBC
decrease of RBC
increase of platelets
decrease of WBC
blood coagulation
transport of respiratory gases
removal of nitrogenous wastes
all the above
Nitrites only
Nitrates only
Nitrates and Ammonia
Urea
white blood corpuscles
red blood corpuscles
blood platelets
plasma
plants
animals
weeds
one pest by another
virus
bacteria
insects
nematodes
Puccinia
Pennisetum
Phytophthora
Erysiphe
Liver
Lung
Brain
Kidneys
Thyroxine
Vasopressin
Heparin
Insulin
erodes blood vessels
blocks conduction of nerve impulses causing respiratory paralysis
produces damage to the kidneys
produces intestinal bleeding
cancer
hepatitis
AIDS
Herpes
carnivorous
herbivorous
omnivorous
insectivorous
Cat
Lion
Tiger
Horse
A
B
C
D
mother
father
grandfather
identical twin
Tetanus
Tuberculosis
Whooping cough
Diphtheria
Bacteria
Virus
Fungi
Pennicilium
Ascaris
Hook worm
Filarial worm
Guinea worm
mango
coconut
teak
paddy
that are evergreen
that shed leaves periodically
that have needle like leaves
that have no leaves at all
Parthenogenesis
Morphogenesis
Histogenesis
Paedogenesis
nyctolopia
myopia
glaucoma
colour blindness
Frontal lobe
Parietal lobe
Temporal lobe
Occipital lobe
A
B
AB
O
5.0 litres
2.5 litres
3.8 litres
4.7 litres
Haemocytometer
Haemoglobinometer
Clinostat
Thermometer
xylem
phloem
cambium
cortex
Alga
Fungus
Bacteria
Virus
A
AB
O
Both (a) and (c)