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Batrachospermum :Origin ,strucutre ,Thallus organisation and reproduction

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                                              Batrachospermum Occurrence:-   (1) Batrachospermum is fresh water alga.    (2) It is found in clear, cool, and running streams.   (3) Deepwater plants are dark violet or reddish in color. But the shallow-water species are olive green.   (4) The intensity of light changes the color of pigments.   (5) The thallus is attached to the substratum. Vegetative structure  (1) The thallus of an adult plant is soft, thick, filamentous.  (2) It is freely branched and gelatinous.   (3) The central axis is made up of a single row of large cells. Whorls of branches of limited growth        are developed on this axis.  (4) These branches are filamentous and dichotomously arranged.  (5) The main axis is corticated. It consists of a row of elongated cylindrical cells....
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Practice Questions for NEET Preparation

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Q.1. In many bacteria the cell wall is infolded and form inner invaginated form is called ?,

A. Pilli

B. Golgi bodies

C. Mitochondria

D. Mesosome,

Q.2. The cell wall of Gram positive bacteria is composed of ?,

A.Murein

B. Cellulose

C. Lipid and protein

D. cellulose and protein,

Q.3. bacaterium having flagella all over the bodt is called ?,

A. peritrichus

B.Amphitrichus

C. Monotrichus

D.None of these
,Q.4. Which of the following is symbiotic nitrogen fixer ?,

A. Glomus

B.frankia

C.azolla

D.Azatobacter,

Q.5.Spirochaetes is ?,

A. Bacteria

B.BGA

C. Fungi

D. Virus,

Q.5. Which is correct for cellwall of bacteria and fungi ?,

A. Formed by Murmeric acid

B. Made up of cellulose

C. Both are made up of N-acetyl glucosamine

D. none of these,

Q.6. Which of the following is the feature of crysophytes ?,

A. Surface rich of pellicle

B. indestructable cell wall

C. They are commonly called Dinoflaggelates

D.NOne of these,

Q.7. Contractile vacoule in amoeba is meant for?,

A. Respiration

B. Digestion

C .Circulation

D. Osmoregulation,

Q.8. Which is Correct ?,

A. Slime moulds is Haploid

B. Protozoan lacks cell wall

C. Dinofllagelates immobile

D. None of these,

Q.9. Reproduction in Paramecium is controll by ?,

A. Macronucleus

B. Micronucleus

C. Alimentary bodies

D. NOne of these
,Q.10. Yeast belong to ?,

A.Ascomycetes

B.basidiomycetes

C.oomycetes

D. Zygomycetes,

Q.11. Purified Antibiotic pencilin of penicilum notatum is discover ?,

A. Alexnder Flemming

B. Howard floxy

C. Robert Hooke

D. None of these,

Q.12. Neurospora is a member of ?,

A. Ascomycetes

B. Basidiomycetes

C. Zygomycetes

D. Deuteromycetes,

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Batrachospermum :Origin ,strucutre ,Thallus organisation and reproduction

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                                              Batrachospermum Occurrence:-   (1) Batrachospermum is fresh water alga.    (2) It is found in clear, cool, and running streams.   (3) Deepwater plants are dark violet or reddish in color. But the shallow-water species are olive green.   (4) The intensity of light changes the color of pigments.   (5) The thallus is attached to the substratum. Vegetative structure  (1) The thallus of an adult plant is soft, thick, filamentous.  (2) It is freely branched and gelatinous.   (3) The central axis is made up of a single row of large cells. Whorls of branches of limited growth        are developed on this axis.  (4) These branches are filamentous and dichotomously arranged.  (5) The main axis is corticated. It consists of a row of elongated cylindrical cells....
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Read more