Question
Root development is promoted by
✓
Answer
d
(d) : Ethylene promotes root growth and root hair formation. In low concentration ethylene is used for initiation of roots and also of lateral roots.
(d) : Ethylene promotes root growth and root hair formation. In low concentration ethylene is used for initiation of roots and also of lateral roots.
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The following $(I-IV)$ are the main steps of chemosynthetic $ATP$ synthesis in the light reaction. Arrange them in correct order
→$I$. $H^{+i i}$ concentration gradient established
$II$. $H^{+i i}$ diffuses through $ATP$ synthetase
$III.$ Carriers use energy from electrons to move $H^{+i i}$ across the membrane
$IV$. Electrons from $PS-II$ pass along electron transport chain
$V.$ Light excites electrons in $PS-II$
$VI.$ Energy of $H^{+i 6}$ flow is used by $ATP$ synthetase to make $ATP$
Following pyramid indicates
The innermost wall layer of anther
A weak creeping stem, rooting at nodes and bear a series of plants of successive vegetative generations is called
$A$ : Cells of sclerenchyma have thickened secondary walls.
→$R$ : Cells have deposition of lignin.
Match the following
→| $(a)$ Protein | $(i)$ $SER$ |
| $(b)$ Lipid | $(ii)$ Golgi body |
| $(c)$ Glycoprotein | $(iii)$Lysosome |
| $(d)$ Hydrolytic enzyme | $(iv)$ $RER$ |
Which statement are correct from given statement ?
(i) In majority of the dicotyledonous plants primary root form.
(ii) Tap root system present in mustard plant or all dicotyledonous plants.
(iii) In monocotyledonous plants adventitious roots system present.
(iv) Fibrous root arises from the base of the stem after death of primary root.
(v) Roots arise from parts of the plant other than the radicle and are called pulvinus roots.
(i) In majority of the dicotyledonous plants primary root form.
(ii) Tap root system present in mustard plant or all dicotyledonous plants.
(iii) In monocotyledonous plants adventitious roots system present.
(iv) Fibrous root arises from the base of the stem after death of primary root.
(v) Roots arise from parts of the plant other than the radicle and are called pulvinus roots.
Unequivocal proof that DNA is the genetic material was first proposed by
Weather is the
Assertion: The megaspore mother cell divide mitotically to produce four spores.
Reason: Megaspore mother cells are diploid and megaspore is haploid.
Reason: Megaspore mother cells are diploid and megaspore is haploid.