When the neurotransmitter acetylcholine is applied to skeletal muscle cells that have been cultured in vitro, it binds the acetylcholine receptor and causes the muscle cells to contract. Succinylcholine, which is a chemical analogue of acetylcholine, binds to the acetylcholine receptor on skeletal muscle cells but causes the muscle cell to relax; it is therefore often used by surgeons as a muscle relaxant. What might be the mechanism to explain the different activities of acetylcholine and succinylcholine on the acetylcholine receptor?

Answer:

Effective food supply was most likely an effect on society that resulted from improvements in blood handling during World War I and World War II.

Myths about aging : 

Depression and loneliness are normal in older adults. ...

The older I get, the less sleep I need. ...

Older adults can't learn new things. ...

It is inevitable that older people will get dementia. ...

Older adults should take it easy and avoid exercise so they don't get injured.

Explanation: with a great tolerance to a wide range of conditions the species would adapt and thrive which would allow it to reproduce and have all it needs to survive, grow, and take over.

A spring is a natural discharge point of subterranean water at the surface of the ground or directly into the bed of a stream, lake, or sea. Water that emerges at the surface without a perceptible current is called a seep. Wells are holes excavated to bring water and other underground fluids to the surface.

The image shows a cross-section of land scape.

Answer : 900 kg pumpkins

The T-chart by categorizing each statement as something that would most likely be relevant to gene flow or genetic drift. Some answers will fit in both columns depending on the situation. is random is a mechanism for evolution is often related to disasters is also called “migration” deals with movement between populations...

Fungi are a food source for animals and humans. Fungi produce oxygen to breathe. Fungi destroy rocks and minerals. Fungi are natural recyclers.

The nerves and muscles communicated with each other to trigger her reflexive response…

Answer with explaination:

 An attempt to document and identify all biological species living in some defined area, usually a park, reserve, or research area. The numbers of species on earth is rapidly diminishing, knowing what species are around will give us an idea of what we're losing, how our actions are affecting the environment.

Answer: Tornadoes form when warm, humid air collides with cold, dry air. The denser cold air is pushed over the warm air, usually producing thunderstorms.