If the cell grows beyond a certain limit, not enough material will be able to cross the membrane fast enough to accommodate the increased cellular volume. When this happens, the cell must divide into smaller cells with favorable surface area/volume ratios, or cease to function. That is why cells are so small.
simpler answer: Cells are small because they need to keep a surface area to volume ratio that allows for appropriate intake of nutrients while being able to eliminate the cells waste.
Answer:
Long-day Plants Short-day Plants Day-neutral Plants
hibiscus poinsettia pansy
larkspur aster snap dragon
iris salvia
Explanation: i got these & they are right.
The given case is an example of reflex action.
The reflex action is an instant involuntary response to a stimuli, which can cause damage. The reflex action takes place through the processing of message through a reflex arc, this reflex arc lack the involvement of brain and the processing of the stimulus takes place in the spinal cord.
In this case, the sensory receptors detects the stimuli and transfer the message to the relay neuron present in the spinal cord through the sensory neuron. The relay neuron transfer the action message to the effector muscles present at the site of stimulus with the help of motor neurons.
Given below is a block diagram of reflex action.
Answer:
Food prevention is to stop or slow down the spoilage of food,
loss of quality and edibility of food for longer time.
METHODS OF FOOD PRESERVATION
- CANNING: this involves cooking the food in special oil or paste and packing it in air tight cans under strict hygiene.
- REFRIGERATION: this involves storing the food at a temperature below 0°c. This renders bacteria and other decay causing agents inactive
