Question

1. Answer each question in one sentence.
(a) What instrument do we need to see a
unicellular organism?
(b) Where did the protozoa appear first?
2. Answer the following in brief.
(a) How were the sun and the planets in
our solar system created?
(b) Write any two characteristics of
animals.​

Answer 1

Answer:

1st answer is microscope

Answer 2

Answer:

1.

(a) Electron microscope

(b) At first these protozoans lived in the gut of their vertebrate host, but they gradually began invading host tissues and eventually became adapted to spending part of their life cycle in the bloodstream.

2.

(a)The various planets are thought to have formed from the solar nebula, the disc-shaped cloud of gas and dust left over from the Sun's formation. The currently accepted method by which the planets formed is accretion, in which the planets began as dust grains in orbit around the central protostar.

(b)Animals are multicellular. Animals are heterotrophic, obtaining their energy by consuming energy-releasing food substances.

Hope it helps ya!

Explanation: