The structure that carries oxygenated blood from the lungs to the heart is the:
A. Pulmonary artery
B. Superior vena cava
C. Pulmonary vein
D. Aorta
Answer: Option C
Solution (By JKSSB Mock Tests)
The four pulmonary veins drain oxygen-rich blood from the lungs into the left atrium. The pulmonary artery carries deoxygenated blood from right ventricle to lungs. Vena cava brings deoxygenated blood to right atrium.
Explanation:
Glucose produced during photosynthesis is often polymerized into starch (a polysaccharide) for storage in chloroplasts or amyloplasts. This is an anabolic polymerization process. Photosynthesis produces glucose, respiration breaks it down, translocation is transport of solutes. Starch is a reserve carbohydrate.
Explanation:
Dolly (1996) was created by somatic cell nuclear transfer (SCNT), where the nucleus from an adult somatic cell (udder) was transferred into an enucleated egg cell, which was then implanted in a surrogate. This proved that differentiated somatic cells can be reprogrammed to totipotency. She was the first mammal cloned from an adult cell.
Explanation:
The fallopian tube (oviduct) is the site of fertilization where sperm meets the ovum. The fertilized zygote then travels to the uterus for implantation. Ovary releases the ovum. The uterus is the site of implantation and fetal development. Cervix is the lower narrow portion of the uterus. The ampulla of the fallopian tube is the most common fertilization site.
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