Question 11 of 18
Phycoerythrin is the major pigment in:
Explanation will be generated when opened.
Plant kingdom PYQs
Class XI Biology • NCERT Based • NEET Practice
Question 12 of 18
Which of the following statements is incorrect about gymnosperms?
Explanation will be generated when opened.
Question 13 of 18
Male and female gametophytes do not have an
independent free living existence in:
Explanation will be generated when opened.
Question 14 of 18
Which of the following pairs is of unicellular
algae?
Explanation:
Chlorella and Spirulina are considered unicellular organisms in NCERT. Chlorella is a simple, single-celled green alga. Spirulina is described as a blue-green alga (cyanobacterium) and, for the purposes of NCERT multiple-choice questions, treated as unicellular. Thus, this pair represents unicellular algae.
? Did You Know?Other options include multicellular forms: Laminaria and Sargassum (brown algae), Gelidium and Gracilaria (red algae), and Anabaena (cyanobacterium) with Volvox (colonial green alga), not unicellular.
? NCERT Memory Line:Unicellular green algae like Chlorella, and unicellular blue-green algae (spirulina) are examples used to illustrate single-celled photosynthetic organisms in NCERT discussions.
Question 15 of 18
Read the following statements and choose the set of correct statements:
In the members of Phaeophyceae,
A. Asexual reproduction occurs usually by biflagellate zoospores.
B. Sexual reproduction is by oogamous method only.
C. Stored food is in the form of carbohydrates which is either mannitol or laminarin.
D. The major pigments found are chlorophyll a, c and carotenoids and xanthophyll.
E. Vegetative cells have a cellulosic wall, usually covered on the outside by gelatinous coating of algin.
Choose the correct answer from the options given below:
In the members of Phaeophyceae,
A. Asexual reproduction occurs usually by biflagellate zoospores.
B. Sexual reproduction is by oogamous method only.
C. Stored food is in the form of carbohydrates which is either mannitol or laminarin.
D. The major pigments found are chlorophyll a, c and carotenoids and xanthophyll.
E. Vegetative cells have a cellulosic wall, usually covered on the outside by gelatinous coating of algin.
Choose the correct answer from the options given below:
Explanation: NCERT Page No.26, (Topic-3.1.2 Phaeophyceae)
Question 16 of 18
Given below are two statements:
Statement I: In gymnosperms, the male and female gametophytes remain within the sporangia.
Statement II: In gymnosperms, seeds are not covered.
In the light of the above statements, choose the most appropriate answer from the options given below.
Statement I: In gymnosperms, the male and female gametophytes remain within the sporangia.
Statement II: In gymnosperms, seeds are not covered.
In the light of the above statements, choose the most appropriate answer from the options given below.
In gymnosperms, both male and female gametophytes develop within the sporangia, and their seeds are naked (not enclosed in fruits).
Question 17 of 18
Sphenopsida class belongs to _______.
Sphenopsida (horsetails such as Equisetum) belongs to the pteridophytes.
Question 18 of 18
In which one of the following, the ovules are not enclosed by an ovary wall and remain exposed?
Gymnosperms such as Pinus bear naked ovules that are not enclosed within an ovary. Angiosperms have enclosed ovules, while bryophytes do not produce ovules.