Answer:
By action potential nerve contract the muscle
Explanation:
The muscle contract when the nervous system sends action potential to the muscle. So the nervous system delivers signal to muscle, the first signal reaches the neuromuscular junction. The signals are passed by a chemical messenger called neurotransmitter release by motor neurons, the chemicals bring reaction and shorten the muscle fibre. When neurotransmitter are absent or reduce in concentration the process reverse and muscle relax again.
Answer:
The Green plants are missing in the food chain
Explanation:
Producers: The green plants since they produce their own food are also termed as autotrophs. They absorb energy from the sun to make their food. In ocean the phytoplanktons are the producers. In oceans the zooplanktons eat the phytoplanktons. Again the smaller zooplanktons eaten by larger zooplanktons and this eaten by fish. The fish is eaten by a bird. The tertiary consumer.
Consumers: It includes all organism eat something to survive. They might be herbivores and carnivores
Decomposer: The microbes bacteria and fungi converts dead matter into carbon and nitrogen which backs into the atmosphere.
2. During differentiation, certain genes are activated to produce proteins that enable specific functions.
3. Meiosis results in offspring with genotypes that are not exact copies of the parents.
4. DNA replication occurs before the division of the nucleus.
5. I can't answer without the image.
6. ovary cells (and testes in males)
7. I can't answer without the image.
8. It was passed to the individual by a gamete from the father.
9. 3n
11. Need the diagram.
During photosynthesis, the energy from sunlight is used to split water molecules. The thing that happens to the hydrogen ions that are split from the water molecules is that A. they build up in the thylakoid.
Answer:
An inclined plane is a simple machine. An inclined plane is a ramp used to reduce the effort needed to raise or lower an object over a vertical height.
It is easier to climb stairs to get to a second floor than to climb straight up a rope. It is easier to walk up a long, gentle hill than to climb up a short, steep hill
, both condition work is done by gravity which is conservative force. So work is same. But if we will take friction force then for your kind information total world done on plane will be more than stairs due to longer path of plane were against of non conservative force.
The following are examples of inclined planes:
* Loading ramp
* Stairs or wheelchair ramp
* Mountain road
* Threaded screw.
The ancient Egyptians used inclined planes, or ramps, to move huge blocks of stone to build the pyramids.
