The role of a catalyst in a chemical reaction is to A. be non-specific enough to work in any reaction.
B. increase the amount of energy required for the reaction to occur.
C. enter into the reactants to change the product.
D. lower the activation energy and speed up the reaction.

Oblate

An autotrophic protist - they can perform photosynthesis and mainly consist of unicellular algae. they can be divided into number of systematic group according to the shape of their cell and the type of photosynthetic pigments they use.

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the