MCQ
The endosperm in angiosperms develops from
  • A
    Zygote
  • Secondary nucleus
  • C
    Chalazal polar nucleus
  • D
    Micropylar polar nucleus

Answer

Correct option: B.
Secondary nucleus
b
Endosperm in angiosperms develops as a fusion product of secondary nucleus with male gamete. Secondary nucleus is diploid structure formed by fusion of haploid chalazal polar nucleus and haploid micropylar polar nucleus. Zygote is formed by the fusion of male gamete with egg

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Match the following

$‘A’ $                                        $ ‘B’$

$(1) $ Auxin                        $(I)$ Ripening and maturity of fruits

$(2)$Gibberellin                 $(II)$Differentiation of xylem elements

$(3) $ Cytokinin                  $(III)$ Prevention of genetic and physiological dwarfism

$(4) $ Ethylene                   $(IV)$  Found from tumour tissue of tobacco

 $(1)$     $(2)$     $(3)$     $(4)$

Gastric ulcers are formed in which part of the alimentary canal?
$JGA$ Controls.
The living organisms can be unexceptionally distinguished from the non$-$living things on the basis of their ability for:
Match the following.

$\begin{array}{|p{0.6\linewidth}|p{0.3\linewidth}|} \hline Column\,\,-I  & Column\,\,-II \\ \hline (p)\,\,Grana\,\,region\,\,of\,\,chloroplast & (i)\,\,Krab's\,\,cycle \\ \hline (q)\,\,Stroma\,\,region\,\,of\,\,chloroplast & (ii)\,\,Light\,\,reaction \\ \hline (r)\,\,Cytoplasm  & (iii)\,\,Dark\,\,reaction \\ \hline (s)\,\,Cytoplasm\,\,of\,\,mitochondria & (iv)\,\,Glycolysis \\ \hline \end{array}$

 

Which of the following characteristics out of $I, II, III, IV$ are exhibited by $C_{4}$-plant?

$I$. Kranz anatomy   $II$. Oxaloacetic acid    $III$. Large bundle sheath cells

$IV$. Found only in desert area

Phylum coelenterata has remained at
The knee joint in between the thigh and lower leg is a
List the phyla in the correct order of their placement in classification

$I$. Chordata                 $II$. Annelida

$III$. Arthropoda        $IV$. Platyhelminthes

$V$. Ctenophora           $VI$. Aschelminthes

Which structure opens in alveolar sac ?