Answer:
1)ans:- The iris contains muscles that allow the pupil to become larger (open up or dilate) and smaller (close up or constrict).
2)ans:- Light enters the eye through the transparent front surface called the ....Cornea...
3)ans:- The rods and cones send signals to the brain along a short , thick nerve called the .....optic nerve......
************This answer is given by MD.Tashin***************
The answer is B because air is made up of a lot of mixture
Answer:
B. The random movement of pollen granules suspended in water.
Explanation:
Brownian motion is the irregular movement of particles suspended in a liquid or a gas, and it is usually caused when there is a bombardment of the particles by the molecules in the liquid or gas.
The Brownian motion who was named after Robert Brown, first experimented the random movement of pollen grains in water; therefore the movement of pollen grains or granules suspended in water.
The spiral shape of Milky Way Galaxy CANNOT be seen from Earth because we are located within one of its spiral arms.
Answer:
C. wavelengths of light and the rate of photosynthesis
Explanation:
The experiment by Theodor W. Engelman demonstrated the relationship between wavelengths of light and the rate of photosynthesis.
Various experiments have reported that the optimal regions of white light that drive photosynthesis is the red and blue regions.
During photosynthesis, carbon dioxide and water is utilized to synthesize glucose and oxygen is produced as a result. Hence, the rate of production of oxygen is directly proportional to the rate of photosynthesis.
<em>Therefore, the more the photosynthesis rate, the more the oxygen produced and the more the growth of aerobic bacteria. This is why more bacterial growth was observed around the red and blue region of white light according to Engelmann's observation.</em>
The correct option is C.