The role of spindle fibers is to form protein that separates genetic material inside a cell.
The answer should be C, It diffuses from the alveoli into the blood.
Alveoli, also called the air sac, is the place where the oxygen we breathed in is exchanged with carbon dioxide that our body produces. Oxygen is passed into the blood in the capillaries through the process of diffusion, while carbon dioxide is diffused from the blood back to the alveoli, so that we can exhale the carbon dioxide after that.
Both a and b are not right because when we breathe in, the oxygen travels from the trachea to the bronchi, to the bronchiole, and to the alveoli, instead of directly into blood vessels like arteries, capillaries, or veins. d is also not right because the direction is wrong.
Therefore, your answer should be C.
Answer: see explanation
Explanation:
(1). Substainibility actually means finite, renewable etc.
Sustainable resources are natural resources that are renewable and can be harnessed for important things for mankind without short of supply
(2). Water is too cheap, compared to its real value, and is rarely taken into consideration when decisions are made regarding resources. In general, decisions that determine how most of water is utilized are taken by a limited number of people.
(c). Reducing the development of thermal power stations: power station produces 80% of our electricity and consume a lot of water. We can do this by rewarding farmers that uses irrigation farming efficiently.
Answer:
DNA molecular weight standard controls, also known as DNA ladders
Explanation:
A DNA ladder is a molecular-weight size marker used to identify the size of the PCR products in a gel electrophoresis. The DNA ladder consists of a solution containing double-stranded DNA fragments with different molecular weights including, among others, 50 base pairs (bp), 100 bp, 1000 bp and 3000 bp DNA fragments. The concentration of each DNA fragment in the DNA ladder must be sufficiently high to be visualized on the electrophoresis gel.
