Answer:
3 groups.
Explanation:
Each of these three groups have multicellular species and the green and red algae have many single-celled species. The land plants are not considered protists.
Answer:
B: Freshwater biomes are a vital source of drinking water.
Explanation:
It's not A because oceans are part of marine biomes, and oceans contain 97% of the Earth's water and covers 71% of the Earth's surface.
It's not C because marine biomes supplies more oxygen than freshwater biomes. Marine algae supply much of the world's oxygen supply, and they take in a huge amount of atmospheric carbon dioxide.
It's not D because freshwater biomes include streams, rivers, ponds, and lakes. Aquatic biomes include oceans, coral reefs, and estuaries.
It's B because freshwater biomes are very important to our survival because they supply people with more than half of their drinking water.
Agonist muscles and antagonist muscles are the muscles that cause or inhibit a movement. Agonist muscles cause a movement to occur through their own activation, whereas antagonist muscles produce an opposite joint torque to the agonist muscles controlling the movement.
Hamstrings are the group of the muscles and tendons located in the upper leg. They include the biceps femoris, semimembranosus and semitendinosus which play an important role in walking, running and jumping. They bend the knee and move hip backward. The muscle that is antagonist to the hamstrings are the quadriceps. Quadriceps are the group of muscles located in the front of the thigh which include the vastus lateralis, vastus medialis, vastus intermedius and the rectus femoris. They help in extending or straightening the knee. Hamstrings contract to bend the legs and the quadriceps relax. Quadriceps contract to straighten the leg and the hamstrings relax.
