List of top Botany Questions

Match the following list: 


 

Match the following list

In Lac Operon Z, Y, a and i indicates the following codes

Match the following

Assertion (A): Root pressure does not play a major role in water movement in tall trees.
Reason (R): Root pressure is responsible for pushing up water to small heights in stem.
The genetic nature of TMV (Tobacco Mosaic Virus) as RNA was confirmed by:

Match the following list: 

Assertion (A): Buds present in the axils of leaves are capable of forming a branch or a flower. 
Reason (R): Axillary buds are constituted by the shoot apical meristems.

Plants which perform photosynthesis by these parts:
a) Ribbon like roots
b) Fleshy cylindrical stem
c) Needle like stem
d) Flattened stem
 

Study the following and choose the correct pair

Pyriform gametes with two laterally attached flagella are found in
Assertion (A): Secondary growth is absent in monocots generally.
Reason (R): Vascular bundles are conjoint and closed.

Find incorrect statements related to water relations in plants: 
A. Water potential difference is the drawing force for osmosis. 
B. The driving force of diffusion is the concentration gradient. 
C. Pressure potential is negative.

Assertion [A] : Bulk flow can be achieved either positive hydrostatic pressure gradient or a negative hydrostatic pressure gradient.
Reason [R] : Movement in the xylem is always bidirectional.
In F2 progeny of dihybrid cross in pea plant the ratio of genotypes YyRR, yyRR, YyRR, Yyrr is

Choose correct combinations

Study the table and find deficiency symptoms shown in plants

From the diagram answer the following:

Which of the following statements are correct?
I. In cyathium flowers are pollinated by Blastophaga
II. Bilipped corolla is seen in Ocimum
III. Basal placentation is found in Dianthus
IV. Whorled phyllotaxy is found in Alstonia

Find the correct statements regarding the structure of xylem and phloem: 
I. Xylem parenchyma store starch or fat or Tannins 
II. Xylem parenchyma have highly thickened walls and obliterated central lumens 
III. Companion cells are controlled by nucleus of sieve tubes 
IV. Phloem parenchyma is absent in most of the monocots

Choose the correct statements related to plant reproduction
I. In Cladophora, male and female gametes are morphologically similar
II. Male and female gametes of Pteris are heterogametes
III. Fungi are usually homothallic and unisexual
IV. Monoecious plants are bisexual

Identify A, B, and C in the given Hatch and Slack pathway diagram:


 

Choose the incorrect pair regarding plant tissue culture.

Study the comparison of different transport mechanisms to pick out the correct pair in the following format: 


 

Formation of an embryo from an unfertilized female gamete