Q. No.Diatoms have left behind large amounts of cell wall deposits in their habitat because:
1. They are most abundant in that habitat
2. Their life span is long
3. Their wall is indestructible
4. The statement is not true
Dinoflagellates:
I. Are mostly marine and photosynthetic.
II. Have a cell wall that has stiff cellulose plates on the outer surface.
III. Have two flagella
IV. Have chloroplasts bound by three membranes
The correct statements are:
(1) I, II and III
(2) I, III and IV
(3) II, III and IV
(4) I, II III and IV
Consider the following characters:
I. Heterotroph organisms
II. A dikaryon stage
III. Cell wall made of chitin
IV. Undergo nuclear mitosis
Which of the above relate to fungi?
(1) I, II and III
(2) I, III and IV
(3) II, III and IV
(4) I, II, III and IV
How many of the following statements regarding fungi are true?
| I. | Asexual reproduction is common by the formation of spores. |
| II. | Their bodies consist of hyphae that may be interconnected to form mycelium. |
| III. | They secrete digestive enzymes onto organic matter and then absorb the products of the digestion. |
| IV. | Fungi can break down almost any carbon containing product. |
| V. | Fungi do not enter symbiotic relationships. |
1. 2
2. 3
3. 4
4. 5
Which of the following is not an edible mushroom?
(1) Agaricus bispora
(2) Pleurotus ostreatus
(3) Lentinula edodes
(4) Amantia phalloides
Consider the following characters:
I. Nuclear envelope
II. Membranes lacking sterols
III. 80s ribosomes
IV. split genes
The character not shared by fungi with other eukaryotes is/are:
(1) II alone
(2) IV alone
(3) II and IV only
(4) III and IV only
Fungi resemble plants in:
(1) Lack of chloroplasts and heterotrophic nutrition
(2) Reproduction by only sexual means
(3) Having a cell wall and vacuoles
(4) Exhibition of bioluminiscence
Identify the characteristic that is unique to fungi:
(1) Cell wall of glucans and chitin
(2) Lack of chloroplasts and heterotrophic nutrition
(3) Mannitol, trehalose and glycogen as storage products.
(4) Having haploid nuclei and production of spores
What is not true for Mycorrhizae?
I. Nearly 30% of vascular plants have this symbiotic relationship with fungi.
II. The fungus primarily makes nitrogen available to plants.
III. Fungi get organic carbon from plants.
(1) I alone
(2) I and II only
(3) II and III only
(4) I, II and III
Identify the group of fungi that is not correctly matched with all the characters given below:
| 1. | Phycomycetes: | Mycelium – aseptate and coenocytic / Asexual reproduction by motile zoospores or by nonmotile aplanospores / spores – endogenously produced in the sporangium |
| 2. | Ascomycetes: | Mycelium – unbranched and septate / Asexual spores are conidia / Conidia produced endogenously on conidiophores. |
| 3. | Basidiomycetes: | Mycelium–branched and septate / Asexual spores are generally not found. |
| 4. | Deuteromycetes: | Only the asexual or vegetative phase of these fungi are known. |
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