Guard cells help plants to
Photosynthesis
Respiration
Water regulation in cells
All the above
Immunization is brought about by:
Injecting medicine against the disease
Keeping personal hygiene
Keeping the surroundings clean
Injecting germs itself.
Red blood cells are red due to the presence of
haemocyanin
haemoglobin
serotonin
epinephrine
Red blood cells are produced in
liver
brain
bone marrow
plasma
Red blood cells are also known as
erythrocytes
leukocytes
neurocytes
oxycytes
Red blood cells are ___ white blood cells in size.
equal to
smaller than
larger than
None of these
