The part of the human gut that has an acidic content is the
stomach
duodenum
ileum
colon
I. Stomata → Spirogyro
II. Alveoli → Earthworm
III. Malpighian tubule → Mammal
IV. Contractile vacuole → Protozoa
Which of the above structures is correctly matched with the organisms in which it is found?
III
II
I
IV
A food chain always begins with a
consumer
decomposer
producer
primary consumer
Mycorrhizae promote plant growth by
absorbing inorganic ions from the soil
protecting it from infection
helping it to utilize atmospheric nitrogen
serving as a growth regulator
The barrier between maternal and foetal blood is the
placenta
liver
umbilical chord
uterine wall
