60 million years is the answer.
Sorry I can’t see the image well but it would be number 2 and another one with a number in the middle of a tectonic plate
I just took this test. It's A: Cornea; lens. Hope this helped!
Answer:
B.
Explanation:
The movement of substances(ions and molecules) against their concentration gradient is called Active transport.Since these substances are moving against whew they are already in abundance,extra energy is needed for them to move against this gradient.Therefore,ATP.,oxygen is needed by the cells undergoing this transport process to transfer substances into the cells.
It is useful for entry of substances in plants e.g glucose,and for transport of materials in intestine in man
Na-K pumps, exocytosis,endocytosis are examples of this transport process.
It is inhibited by lack of oxygen,cyanide etc.
When a neurotransmitter opens a chemically gated ion channel that allows sodium to enter the postsynaptic cell, the result is an EPSP. It is an excitatory potential.
An excitatory postsynaptic potential (EPSP) is a type of potential that causes an increase in the potential due to the flow of positively (+) charged ions such as sodium ions.
The release of chemical messengers called neurotransmitters by presynaptic cells leads to the excitatory postsynaptic potential.
These neurotransmitters bind to specific cell receptors localized in postsynaptic cells.
Learn more about the excitatory postsynaptic potential here:
brainly.com/question/17013128
