MCQ
Apomictic embryos in Citrus arise from
- Asynergids
- ✓maternal sporophytic tissue in ovule
- Cantipodal cells
- Ddiploid egg.
✓
Answer
Correct option: B.
maternal sporophytic tissue in ovule
b
(b) : Apomixis is abnormal kind of sexual reproduction in which egg or other cells associated with egg (synergids, antipodals, etc.) develop into embryo without fertilization and meiosis. Development of embryos directly from sporophytic tissues like nucellus and integuments is called adventive embryony which is also a type of apoximis. $E.g.$, Citrus, mango.
(b) : Apomixis is abnormal kind of sexual reproduction in which egg or other cells associated with egg (synergids, antipodals, etc.) develop into embryo without fertilization and meiosis. Development of embryos directly from sporophytic tissues like nucellus and integuments is called adventive embryony which is also a type of apoximis. $E.g.$, Citrus, mango.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
$A$ population is said to achieve demographic transition, if
→Identify $'a'$ in given figure :
→What is/are the correct explanations about higher diversity in tropical areas in comparison to the temperate areas?
→$I$. There are no favourable seasons in tropics
$II$. Less solar energy is available in tropics
$III$. Rate of extinction is low in tropics
$IV$. Resource availability is higher in tropics
Choose the correct option
$A$ : Single $DNA$ dependent $RNA$ polymerase catalyses transcription of all types of $RNA$ in all except bacteria.
$R$ : Structural genes in bacteria are monocistronic.
→$R$ : Structural genes in bacteria are monocistronic.
If a colourblind man marries a woman who is homozygous for normal colour vision, the probability of their son being colourblind is
$A$ : Pst I generates single stranded over hanging stretches in $DNA$ after digestion that facilitate ligation.
→$R$ : These short extensions can form phosphodiester bonds with their complementary counterparts.
Which is not a structural aspect of ecosystem?
Aril is found in which of the following fruits ?
Herbicide resistant gene in plant is :
Hardy and Weinberg proposed a principle for ________ population.