Answer:b. Facilitated transport
Explanation:in the usual activities of the cell,it's cell membrane is responsible for the movement of substance in and out of the cell.
Such substances include nutrients,water, oxygen etc.
The plasma membrane select the substances that it allows into the cell thus it is said to be selectively permeable.
The plasma membrane of the cell has a phospholipid bilayer made up of cholesterol, proteins and glycoproteins.
The proteins on the membrane are useful for facilitated diffusion.
In this diffusion process,the proteins helps to carry large molecules across the cell membrane.such molecules includes glucose,amino acids etc.
In the process energy is not expended so it is a type of passive transport.
Bacteria
Nitrogen fixing bacteria are those that convert atmospheric nitrogen to different nitrogenous ions and add them to the soil. These bacteria may either be free living in the soil, or they may develop a mutualistic relationship with some organisms, such as the nitrogen fixing bacteria that live in the root nodules of leguminous plants. An example of a genus of nitrogen fixing bacteria is the genus Azotobacter.
Answer:
Gram-negative bacteria
Explanation:
When the bacteria took pink color (safranine), it means they are gram-negative bacteria. Gram-negative bacteria have thick cell walls it does not take crystal violet stain as its cell wall is thicked. It take-up counterstain safranine and seen pink in the microscope.
Answer:
Succulents
Explanation:
They have a thick waxy cuticle so that water vapour does not escape easily
Some have thornes so they are not eaten by animals
There roots are very wide and shallow so that they can absorb water from the surface quickly after it rains
Their stomata open at night so that too much water vapour cannot diffuse into the air
Yes. You're tall. I'm seventeen and have yet to reach 5'5.
