STD 11 - 13. Plant growth and development — NEET STD 11 Science — Question

In Cycas, the endosperm is

Which one of the following shows isogamy with non-­flagellated gametes?

Study the following statements and choose the incorrect statement :
(i) Prior to the work of Avery, MacLeod and McCarty, the genetic material was thought to be a protein. They concluded that DNA is the hereditary material.
(ii) Hershcy and Chase worked to discover whether genetic material was protein or DNA.
(iii) The unequivocal proof that DNA is the genetic material came from the experiments of Alfred Hershey and Martha Chase (1952).
(iv) Hershcy and Chase worked with viruses that infect bacteria called bacteriophage.
(v) Griffith was concluded that DNA transferred from dead to living bacteria.

In zoological name of an organism the first word will be

Importance of Lupine is

Fill in the blanks.
(i) 4-C compounds like A or B formed in mesophyll cell of C₄ plants are transported to the bundle sheath.
(ii) The bundle sheath cells are rich in an enzyme C but lacks D.
(iii) E pathway is common to C₃ and C₄ plants.
(iv) The active site of RuBisCO has both F and G_binding sites. It has greater affinity for H.
(v) PGA binds with O₂ to form one molecule of I and J in a pathway called photorespiration.
(vi) C₄ acid from the mesophyll is broken down in the bundle sheath cells to release K- this results in increasing the concentration of L.
(vii) M is the major limiting factor for photosynthesis.
(viii) Increase in concentration upto N % can cause an increase in CO₂ fixation rates; beyond this the level can become damaging over longer periods
(ix) C₄ plants show saturation at about O u1L^-1 while C₃ responds to increased CO₂ concentration and saturation is seen only beyond P u1L^-1.

Linnaeus is credited for introduction of

The percentage of light energy utilized for photosynthesis by higher plants is