There are trillions of cells EVERYWHERE including blood cells, brain cells, and even skin cells !! I believe that multicellular organisms that are large need to have trillions of cells to be able to fill their whole body. For example , humans, Humans have one of the most complex cells, we humans are very big so thousands of cells would not be enough to contain our entire body. Even the word ' multicellular' meaning multiple cells gives people a hint that we are multicellular . In conclusion , trillions of cells are needed for multicellular organisms , without them we wouldn't be able to function properly.
Answer:
Dissaster like meteorite impacted all type of living forms, however, animals are impacted the most and plants are impacted least. It is possible due to ability of plants to prepare their food on their own as they are autotrophic and use photosynthesis. The raw material for preparing these are easily available that are sunlight, CO2 and water.
They are not depende on other for their cellular respiration. The other major reason is that the Plant seeds can remain dormant in unfavorable conditions for many years in the soil. The roots always provide nutrition even the stems get effected.
There should be less bacteria if you are growing it on a petting dish
Two methods of producing transgenic mice are widely used: transforming embryonic stem cells<span> (ES cells) growing in tissue culture with the desired DNA; injecting the desired gene into the pronucleus of a fertilized </span>mouse<span> egg.</span>
Initiating protective reflex actions is not a role of the basal nuclei
Explanation:
A reflex is the “simplest response” to Stimulus. The two examples of reflex are sneezing and blinking. The main role of reflex is to produces a quick motor response. Reflexes are “very fast” and most of reflexes not reach the brain. Reflex can be understood as blinking of eyes from any danger.
The main role of sensory neuron is to carry impulse from receptors to the spinal cord and motor neuron carry impulses from the spinal cord to the effectors.
