Answer:
4) The neuron receives a stimulus great enough to start an impulse.
5) Gated Na+ channels open. The net movement of Na+ ions into the cell produces the action potential..
2) Na+ gates close and K+ ions flow back out of the cell restoring the resting potential.
1) The impulse continues to travel down the axon away from the cell body.
3) Gated K+ and Na+ channels are closed. The inside of the cell is slightly negative compared to the outside.
Answer:
I think you're referring to pedigree symbols.
In pedigrees, males are represented by a square and females by a circle.
Explanation:
* Refer to the attached image.
B.) They both can only exist as single-celled organisms.
C.) They both need an energy source in order to survive.
D.) They both produce carbon dioxide as a waste product.
Ans is option C. They both need an energy source in order to survive.
Energy is an absolute necessity to survive on this earth. All living organisms need energy be it anaerobic or photosynthetic. Photosynthetic organisms can make their own food in the presence of sunlight by photosynthesis and harness energy from it. Anaerobic organisms can also make their own food in the absence of sunlight with the help of inorganic molecules like hydrogen sulfide (H2S), ammonia (NH3), sulphur (S) etc.
Its just that anaerobic organism's way of harnessing energy is different from those of aerobes/photosynthetic organisms but they need energy source for sure.
Answer:b
Explanation:
B. DNA uses deoxyribose and RNA uses ribose.
C. DNA has adenine and RNA has thymine.
D. DNA has thymine and RNA has uracil.