The respiratory system of the birds
Answer:
Enzymes help chemical reactions occur by decreasing the activation energy.
B. It has a whip, like a tail
Explanation - Protists are unicellular organisms. Some multi-cellular organism might exist. Some protists have silica plated scales on their body surface like diatomaceous earth. They exhibit both type of respiration - aerobic and anaerobic. They mainly have parasitic mode of nutrition.
Protists also have flagella which they whip that in turn helps in their movement and this feature have made them to enter into the water body, example - euglena. Paramoecium have cilia on their entire surface that helps in their locomotion in water.
Answer:
Answer is the hierarchy of needs.
Explanation:
This theory comprises of a five-tier model of human needs. Its levels are physiological, safety, love, esteem and self-actualization as arranged from the bottom to the top.
