Which plant tissue transports organic solutes from leaves to other parts?
A. Collenchyma
B. Xylem
C. Sclerenchyma
D. Phloem
Answer: Option D
Solution (By JKSSB Mock Tests)
Phloem is the vascular tissue responsible for translocation of photosynthates (mainly sucrose) from source (leaves) to sink (roots, fruits, growing regions) via sieve tubes and companion cells. Xylem transports water and minerals upward. Collenchyma and sclerenchyma are mechanical tissues. Phloem is alive at maturity.
Explanation:
In aerobic respiration, oxygen accepts electrons at the end of the ETC, forming water. Without it, the chain would halt. This directly explains why oxygen is required.
Explanation:
Emasculation is the removal of stamens (anthers) from a bisexual flower before anthesis to prevent self-fertilization in artificial hybridization experiments. Bagging covers the flower to prevent contamination, tagging labels the cross. Emasculation ensures that only desired pollen is used.
Explanation:
Primase is an RNA polymerase that synthesizes short RNA primers complementary to the DNA template, providing a free 3'-OH for DNA polymerase to begin synthesis. Helicase unwinds, polymerase extends, ligase joins.
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