Answer:
C. Oxygen supply
Explanation:
Autotrophs make their own food with carbon dioxide and create oxygen as a byproduct. Heterotrophs need oxygen to create energy and create carbon dioxide as a byproduct. Therefore, if there are no autotrophs, the carbon dioxide in the air won’t be able to be used to turn to oxygen, which heterotrophs need. The heterotrophs will use up all of the oxygen in the air, leaving lots of carbon dioxide behind. This is why we need plants and trees! Thus, the answer is C.
I hope this helps! :)
Receptors in muscles provide the brain with information about body position and movement. The brain controls the contraction of skeletal muscle. The nervous system regulates the speed at which food moves through the digestive tract.Your muscular system is closely connected to the nervous system. That makes sense since you usually have to think before you can move. Even though thinking is not always involved, the neurons of the nervous system are connected to most of the cells in your muscular system.
Depending on the similarity of the plant species .
Same species usually have similar looking or have similar function of pollen
whereas different species of plant differ in method of spreading their seeds therefore their seeds differ in shape size weight etc ...
a hibiscus plant containing a flower has pollen that are small and grainy which enables it to stick to insects when they come for the juicy nectar. For a coconut tree it has seed which large in size hollow and light weight enabling it to float in water and reach another place to grow and increase their species once again
A tube that extends from a bacterium
It consist of integral proteins and trans-membrane proteins and peripheral proteins as well
