Answer:
The myofibrils are the contractile organelles in the muscle fibers.
Answer: Option B
Explanation:
Myofibrils are very fine contractile fibers which extends in parallel to the columns along the length of the striated muscles fibres.
They are made of thick and thin myofilaments because of which the muscles appear striped.
The thick filaments in the muscles are composed of actin along with two other muscle protein known as tropomyosin and troponin. They help in contraction of muscles.
Answer:
Lake - hydrosphere
Water vapor - hydrosphere
Glaciers and icebergs - cryosphere or the hydrosphere
The Rocky Mountains - lithosphere
A deer - biosphere
Explanation:
There are four main spheres of the earth- The atmosphere (air), the biosphere (living things), the lithosphere (earth) and the hydrosphere (water).
The lakes are part of the hydrosphere
Water vapor present in the air is part of the hydrosphere
The Glaciers and icebergs are a part of the cryosphere (frozen form of water) or the hydrosphere
The Rocky Mountains are a part of the lithosphere
A deer is part of the biosphere
Answer:
Flowers have male parts called stamens that produce a sticky powder called pollen. When pollen from a plant's stamen is transferred to a different plant's stigma, it is called cross-pollination. Cross-pollination produces stronger plants. The plants must be of the same species.
Explanation:
