Grinding pepper is not an example of a chemical change.
(D) Both perform photosynthesis is the observation that led researchers to propose that chloroplasts evolved from cyanobacteria.
Chloroplasts is the area where photosynthesis takes place. It is a green organelle in a plant cell. Pigments called the chloros in a chlorophyll are needed for the photosynthesis.
Cyanobacteria or blue-gree algae contains a blue photosynthetic pigment and a chlorophyll for photosynthesis.
<span>Photoplankton is one of the producers that can be found in the polar regions.</span>
Answer: Possession of Valves
Explanation: Veins possess valves which ensures that blood flows in only one direction. Valves helps blood to flow back to the heart against gravitational force.
Arteries don't have valves because the pressure originating from the heart is capable of causing the blood to flow in one direction.
Answer:
A recessive autosomal allele is a heterozygous pair.
Explanation:
they have one mutated gene (recessive gene) and one normal gene (dominant gene) for the condition.
I would say you're best choice is E or F, but I can't remember right now. Its been a bit since my gene mutation module. Sorry I can't help more!
