Answer:
they are machines or devices build to find la DNA trace and copy it multiple times.
Explanation:
DNA machines are machines built to find a DNA line and copy it multiple times, so scientists can read, observe, and find information about the DNA strand. For example, DNA machines can determine if someone is related, if someone has cancer, and it can distinguish a person’s ancestry. Mainly this is how forensic science uses to determine when there's a suspect in a crime.
Answer:
B: Freshwater biomes are a vital source of drinking water.
Explanation:
It's not A because oceans are part of marine biomes, and oceans contain 97% of the Earth's water and covers 71% of the Earth's surface.
It's not C because marine biomes supplies more oxygen than freshwater biomes. Marine algae supply much of the world's oxygen supply, and they take in a huge amount of atmospheric carbon dioxide.
It's not D because freshwater biomes include streams, rivers, ponds, and lakes. Aquatic biomes include oceans, coral reefs, and estuaries.
It's B because freshwater biomes are very important to our survival because they supply people with more than half of their drinking water.
The variation difference in annual temperature between the southern and the northern hemisphere is due to the fact that the southern hemisphere has a large quantity of water area compare to the northern hemisphere which has large mass of land. The large body of water in the southern hemisphere helps in regulating the tempratrue of the area and keep it fairly constant.
Answer: The male reproductive system has many roles, but two are: it <em>produces, maintains, and transports sperm </em>(male reproductive cells)<em> </em>and <em>semen </em>(the fluid which protects the sperm and allows it to swim to meet the female egg). (continued answer in explanation)
Explanation:
One of many structures in the male reproductive system is the prostate gland. The prostate gland's most necessary feature is that it aids in creating fluid that, together with sperm cells from the testicles and fluids from other glands, makes up semen. The prostate also has muscles which ensure that the semen is vigorously pushed into, and then expelled from the urethra during ejaculation. One hormone in the male reproductive system is LH, or luteinizing hormone. It is made by your pituitary gland (a small gland located beneath the brain). LH plays a very important role in the sexual development and functioning of males. LH also plays a key role in gonadal (testicles) function.
