STD 11 - 5. Morphology flowering plants — NEET STD 11 Science — Question

Which of the following is a meristematic tissue

Which of the following statements are true regarding interphase ?
(i) It is divided into G₁, G₂, and S-phase
(ii) During G₁-phase the cell is metabolically active and continuously grows but does not replicate its DNA.
(iii) During S or synthesis phase DNA synthesis or replication takes place.
(iv) If the initial amount of DNA is denoted as 2C then it increases to 4C.
(v) There is doubling in the chromosome number.
(vi) Initial amount of chromosome is denoted as 2n then it increases to 4n.

Due to chloramphenicol resistance gene, one is able to select a transformed cell in the presence of chloramphenicol. The chloramphenicol resistance gene in this case is called

Vascular cambium and cork cambium are examples of

Assertion: In Cassia and gulmohur, the aestivation is called imbricate.
Reason: One margin of the appendage overlaps that of the next one and so on it is called imbricate.

Assertion : The sex ratio of Kerala is highest in India.

Reason : In countries like India the population is increasing at a rapid rate.

Assertion : The inner membrane of mitochondria contains systems involving electron transport.
Reason : The mitochondrial matrix contains enzymes of Kreb's cycle.