The famous gold foil experiment was conducted by?
Ernest rutherford
what physical feature in a polar bear prevents excessive loss of body heat?
thick coat, small ears etc
What did John Dalton do?
came up with the atomic theory
once a seed is formed, the petals and anthers and stigma, wither away, t/F?
true
wind pollinated flowers have brighter, more colorful sweet smelling petals, T/F?
false
how did democritus contribute in the history of atoms?
suggested the word' atoms'
the male gamete in a flower is the?
pollen
In photosynthesis, carbon dioxide is a reactant, T/F?
True
Hibernation is a structural adaptation, T/F?
False
why does a camels have bushy eyelashes
to prevent sand from entering the eyes
the flower part into which a pollen grows its pollen tube is?
style
to test for carbon dioxide, calcium carbonate is used, T/F?
false
petrol burns in the car is the reaction endothermic/exothermic?
exothermic
in isotopes, atoms have different proton numbers, t/f?
false