The instructions on a chromosome are called-DNA
-Steel jelly
No I don’t have it
What is it
Answer:
There are three main types of blood vessels:
1)Artery ---
i) It is a blood vessel having a thick wall.
ii) It carries blood from the heart to different parts of the body.
iii) On regulatory demand of the body it can dilate or constrict.
iv) It doesn't contain any valve.
v) All arteries carry oxygenated blood except the pulmonary artery.
2)Vein ---
i) It is a blood vessel having a thin wall.
ii) It brings blood from different parts to the heart.
iii) It can't dilate or constrict under normal conditions.
iv) It contains valves that allow the blood to flow in one direction towards the heart.
v) All veins carry deoxygenated blood except the pulmonary vein.
3)Capillary ---
i) It is a very narrow blood vessel that has very thin walls.
ii) It forms a network throughout the body in all living cells connecting arteries to veins.
iii) It can dilate or constrict according to the requirement of tissue.
iv) It doesn't have any valve.
v) It contains mixed blood as it connects arteries and veins
I only have an answer for number 24, I'm sorry! But one piece of evidence is the DNA sequences, they have discovered that humans and monkeys/apes share a common ancestor through DNA. Another would be fossils, scientists have fossils to show great similarities in the skull and jaw structure, along with the legs, comparing to humans.
Answer:why do you need help? you got this. you're smart.
Explanation:
