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1
Botany For Degree Pteridophyta
The young sporophytes arise apogamously from the tips of the branches of
prothalli. Gametophytic tissue was also induced to produce a single leaf. Such
apogamously Fig. 4.24 A. Graphic representation of life cycle of produced
sporophytes ...
What would be the chromosome number in the leaf tip cells of its apogamously
produced sporophyte ? (1) 20 (2) 5 (3) 10 (4) 40 18. A plant has 40 chromosomes
in its secondary nucleus. What would be the chromosome number in the ...
3
An Introduction to Pteridophyta: Diversity, Development, ...
Contrary to it, in apogamously produced diploid sporophytes of Asplenium
trichomanes (Bouharmont, 1972a) and A. septentrionale (Bouharmont, 1972b) all
chromosomes showed pairing indicating that tetraploids were of autoploid-origin.
Sporophytes were produced apogamously in two species from gametophytes
cultured under light conditions; in four species from cell colonies produced in the
dark without the formation of gametophytes; and in six species from spore-origin
...
5
Recent Researches in Plant Sciences
The apogamously formed leaves together with their subtending prothallial tissue
were subcultured on fresh medium. Root and shoot formation was considerably
delayed. The only comparable case of induced apogamy in the absence of ...
6
Chambers concise dictionary
"apogamously adv apogee /'apoud3i:/ >n^ astron the point in the orbit of the
Moon or an artifical satellite around the Earth when it is at its greatest distance
from the Earth. Compare PERIGEE, APHELION. 2 physics the greatest height
reached ...
for constant intermediate hybrid races which I think has never before been
mentioned. In crossing species of the genus Nicotiana, I have had plants develop
from seed that have apparently been formed apogamously, that is, formed from
an ...
8
Chabers 21st Century Dictionary
apogamously adverb. © 19c from Greek apo away + -gamy. apogee /'apoud3i:/ t=
- noun 1 astron the point in the orbit of the Moon or an artifical satellite around the
Earth when it is at its greatest distance from the Earth. Compare perigee ...
9
Concepts of Biology XII
Similarly antipodals also develop apogamously into embryos. In Nicotiana
langsdorfii, N. tabacum, etc., a male gamete gives rise to an embryo by apogamy.
2. Parthenogenesis. It is the development of egg into an embryo without
ferilization.
Prof. Kotpal, Dr. Tyagi, Dr. Bendre, & Dr. Pande
10
Krishna's Objective Question Bank in Biology
What would be the chromosome number in the nucellus of its apogamously
formed sporophyte ? (1) 40 (2) 10 (3) 20 (4) 80 140. A student counts sixty
chromosomes at the anaphase of a dividing nucellar cell in plant A. It shows
apospory.
N Saxena, S Sharma, S Sharma