Good detail....but you missed out CNS, or spinal cord/brain! Which is a crucial part of the reflex arc. Also, (being picky, I know) you could add that the response is the muscle contraction.
In a reflex the brain is skipped because you need an immediate reaction. If the question is asking about a response then we should include the cns
In a reflex the brain is skipped because you need an immediate reaction. If the question is asking about a response then we should include the cns
How about if the receptor is in the eye? Wouldn't the brain be nearer, and therefore faster, than the spinal cord? (Just asking now, don't care about the question)
When plants grow in response to light it is known as phototropism
When plants grow in response to gravity it is known as geotropism
Phototropism: When light shines at a plant auxin is produced in the shaded side of the shoot (the side opposite the light/sun) Auxin causes cells in the shoot of the plant to elongate as auxin promotes cell growth. Therefore the plant bend and grows towards the light.
Geotropism: Auxin is produced in the root tip. Auxin will accumulate on the lower side of the root due to gravity. The auxin inhibits elongation in these cells so the root will eventually bend and grow in the direction of gravity
How about if the receptor is in the eye? Wouldn't the brain be nearer, and therefore faster, than the spinal cord? (Just asking now, don't care about the question)
Actually it probably will because the brain is nearer
Was thalidomide originally used as a sleeping pill and then used for morning sickness (causing the birth defects)?
Thalidomide was originally created as a sleeping pill. But it was discovered to have cured morning sickness in pregnant women. However no tests were conducted on the pill as a morning sickness drug. Many pregnant women took the drug and it caused their babies to have limb abnormalities. Thalidomide was banned as a result.
Can someone please explain genetic modification in crops?
Okay so lets say a bacteria has a gene that produces poison that kills insects. And we want this gene in plants so that the plants can have poison that kills insects. This would be a 4 mark question:
The gene from the bacteria that produces the poison is cut using enzymes. This gene is then transferred to the DNA of the plant cell at early stage of development. The plant now has the poison producing gene and can now kill insects which means the plant can live for longer.