All algae
heterotrophs
autotrophs
parasitic
anaerobes

Autotrophs

Explanation: The algae contain chlorophyll that helps in the trapping the solar energy from the sun.

The solar energy is converted into chemical energy by the help of carbon dioxide present in the atmosphere and water present in soil.

The food synthesized is in the form of glucose. The process by  which the algae makes its own food is known as autotrophic mode of nutrition.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.