The haplontic life cycle is dominant in which algal group, where the zygote is the only diploid stage?
Fucus
Ectocarpus
Polysiphonia
Volvox
Related Questions
Isogamous meanI. both gametes are similar in size and non-motileII. both gametes are dissimilar in size and motileIII. both gametes are similar in size and motileIV. both gametes are dissimilar in size and non-motileWhich of the statement(s) given above is/are correct?
I only
II only
I and III
II and IV
Which of the following statements are TRUE regarding the characteristics of Phaeophyceae?
(i) They reproduce asexually by biflagellate zoospores.
(ii) Their main photosynthetic pigments are chlorophyll a, c, carotenoids, and xanthophylls.
(iii) Their cell walls are composed of cellulose and algin.
(iv) They store food as mannitol, laminarin, and starch.
(i) and (ii) only
(i), (ii) and (iii)
(ii), (iii) and (iv)
(i), (ii), (iii) and (iv)
In which of the following brown algae is the gametophyte generation significantly reduced?
Fucus
Ectocarpus
Dictyota
Polysiphonia
Consider the following statements regarding reproduction in class-Chloropyceae.
I. Asexual reproduction is mainly by flagellated zoospores produced in zoosporangia.
II. The sexual reproduction shows considerable variation in the type and formation of sex cells and it may be isogamous, anisogamous and oogamous.
Which of the statements given above are correct?
Only I
Only II
I and II
None of these
Which of the following genera contains only unicellular algae?
Chlamydomonas
Ulothrix
Laminaria
Chara
(A): Algin is obtained from algae
(R): Vinblastin is a secondary metabolite.
both (A) and (R) are true and (R) is the correct explanation of (A)
both (A) and (R) are true and (R) is not the correct explanation of (A)
(A) is true but (R) is false
both (A) and (R) are false.
(A): Algin is obtained from algae
(R): Vinblastin is a secondary metabolite.
both (A) and (R) are true and (R) is the correct explanation of (A)
both (A) and (R) are true and (R) is not the correct explanation of (A)
(A) is true but (R) is false
both (A) and (R) are false.
Which of the following statements about cell division is INCORRECT?
Mitosis results in two diploid cells.
Meiosis results in four haploid cells.
Mitosis is primarily involved in growth and repair.
DNA replication occurs only during mitosis.
Read the given explanation and select the correct option Explanation A: Each group of Algae has a characteristic colour Explanation R: Each group of Algae shows predominance of One pigment
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is NOT the correct explanation of A
A is true but R is false
A is false but R is true
Consider the following statements regarding reproduction in class-Chloropyceae.
I. Asexual reproduction is mainly by flagellated zoospores produced in zoosporangia.
II. The sexual reproduction shows considerable variation in the type and formation of sex cells and it may be isogamous, anisogamous and oogamous.
Which of the statements given above are correct?
Only I
Only II
I and II
None of these
