Tag: botany

Quizzes (264) Questions (5276)

Questions Related to botany

Multiple choice botany kingdom plantae uses of bryophytes introduction to bryophytes cryptogams

Which one is an amphibious plant

  1. Lotus

  2. Vallisneria

  3. Typha

  4. Trapa
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Lotus, Vallisneria and Trapa are fully aquatic plants. They can survive only in water.

But, Typha is a genus which includes a variety of plants. It is aquatic, semi-aquatic, rhizomatous and herbaceous plants in nature.
So the correct option is C.

Multiple choice botany kingdom plantae uses of bryophytes introduction to bryophytes cryptogams

Which of the following have an independent gametophyte generation and a dependent sporophyte generation?

  1. Horsetails

  2. Mosses

  3. Ferns

  4. Conifers
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Alternation of generations is a term primarily used to describe the life cycle of plants (taken here to mean the Archaeplastida). A multicellular gametophyte, which is haploid with n chromosomes, alternates with a multicellular sporophyte, which is diploid with 2n chromosomes, made up of n pairs. 
  • A mature sporophyte produces spores by meiosis, a process that reduces the number of chromosomes to half, from 2n to n. Because meiosis is a key step in the alternation of generations, it is likely that meiosis has a fundamental adaptive function. 
  • The nature of this function is still unresolved, but the two main ideas are that meiosis is adaptive because it facilitates repair of DNA damages and/or that it generates genetic variation. In liverworts, mosses, and hornworts, the sporophyte is less well developed than the gametophyte and is largely dependent on it. 
  • Although moss and hornwort sporophytes can photosynthesize, they require additional photosynthate from the gametophyte to sustain growth and spore development and depend on it for the supply of water, mineral nutrients and nitrogen.
  • In ferns, the gametophyte is a small flattened autotrophic prothallus on which the young sporophyte is briefly dependent for its nutrition.
Multiple choice botany kingdom plantae uses of bryophytes introduction to bryophytes cryptogams

Identify the correct sequence of plants in the order of character given below.
$(i)$ Sporophyte with foot, intercalary meristem and capsule
$(ii)$ Gemma cups on thallus
$(iii)$ Sorus covered by false indusium
$(iv)$ Embryophytic, tracheophytic, archegoniate

  1. Anthoceros, Marchantia, Pteris, Ginkgo

  2. Polytrichum, Lycopodium, Equisetum, Cedrus

  3. Sphagnum, Selaginella, Psilotum, Ginkgo

  4. Funaria, Gnetum, Dryopteris, Sequoia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Anthoceros has a sporophyte with a foot and intercalary meristem. Marchantia has gemma cups. Pteris (a fern) has sori covered by a false indusium. Ginkgo is a gymnosperm (embryophytic, tracheophytic, archegoniate).

Multiple choice botany kingdom plantae uses of bryophytes introduction to bryophytes cryptogams

Slime pores are found in

  1. Funaria

  2. Riccia

  3. Marchantia

  4. Anthoceros
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Slime pores are found in :

Correct option is (D), Anthoceros.
Anthoceros grown in moist soil. They have thallus body and found in shady area. Slime pores are present in Anthoceros. 
Hence, option D is correct.

Multiple choice botany kingdom plantae uses of bryophytes introduction to bryophytes cryptogams

The plant body of moss(Funaria) is?

  1. Completely sporophyte

  2. Predominantly gametophyte with sporophyte

  3. Completely gametophyte

  4. Predominantly sporophyte with gametophyte
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In mosses like Funaria, the dominant, free-living, and photosynthetic phase is the gametophyte, while the sporophyte is a smaller structure dependent on it. Thus, the plant body is predominantly gametophyte with a dependent sporophyte.

Multiple choice botany kingdom plantae uses of bryophytes introduction to bryophytes cryptogams

Reduced gametophyte is the important character of _____

  1. Lower cryptogams

  2. Higher cryptogams

  3. Gymnosperms

  4. Angiosperms
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The haploid phase in the life cycle of plants is called Gametophyte. It is a haploid phase. It is well developed in bryophytes and highly reduced in angiosperms.

So, the correct option is 'Angiosperms'.

Multiple choice botany kingdom plantae uses of bryophytes introduction to bryophytes cryptogams

Find set of features related to Funaria
a. Protonema
b. Prothallus
c. Gametophore
d. Thallus body
e. NCC in antheridium
f. Haplodiplontic
g. True plant organs in sporophyte
h. Fragmentation

  1. b, d, e, g

  2. a, d, f, g

  3. a, c, f, g, h

  4. a, c, f, h
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Funaria features include a protonema stage (a), leafy gametophores (c), a haplodiplontic life cycle (f), and propagation via fragmentation (h). Features like prothallus (b) belong to pteridophytes, and true plant organs (g) belong to vascular sporophytes, making option C and others incorrect.