Mycorrhiza is correctly described as
symbiosis of algae and fungi
relation of ants with the stem of some trees
parasitic association between roots and some fungi
symbiotic relationship between fungi and roots of some higher plants
D.
symbiotic relationship between fungi and roots of some higher plants
Mycorrhiza is a symbiotic association between a fungus and the roots of a vascular host plant (higher plants). It mainly refers to the role of the fungi in the plants rhizosphere, its root system.
Match Column - I with Column - II and select the correct option from the codes given below
| Column I | Column II |
| A. Chlorophyta | (i) Equisetum |
| B. Lycopsida | (ii) Chara |
| C. Phaeophyta | (iii) Selaginella |
| D. Sphenopsida | (iv) Ectocarpus |
A - (ii), B - (iii), C - (iv), D - (i)
A - (iv), B - (i), C - (ii), D - (iii)
A - (ii), B - (iii), C - (i), D - (iv)
A - (iv), B - (i), C - (iii), D - (ii)
Yeast is not included in protozoans but in fungi because
it has chlorophyll
it shows saprotrophic mode of nutrition
it has eukaryotic organisation
cell wall is made up of cellulose and reserve food material as starch
The microscope usually used for seeing living cells or tissues is
compound microscope
electron micrscope
phase contrast microscope
light microscope.
Identify the accurate explanation of mesosome. It is
a specialised structure of prokaryotic cell formed by extension of plasma membrane into the cytoplasm
the middle layer of the prokaryotic cell wall
the organelle of eukaryotic cell which helps in lipid synthesis
the middle layer of eukaryotic cell wall.
Which of the following microbes is correctly paired with its function?
Aspergillus niger- Production of lactic acid
Trichoderma polysporum- Lowers blood cholesterol
Saccharomyces cerevisiae- Production of citric acid
Methanogenic bacteria- Gobar gas formation
Deuteromycetes are known as fungi imperfecti because
their zygote undergoes meroblastic and holoblastic cleavage
only asexual stages are known
they have aseptate myceliun
they are autotrophic
Identify the labelled part in the given figure and select the correct option.
A - Heterocyst, B - Mucilaginous sheath
A - Mucilaginous sheath, B - Heterocyst
A - Heterocyst, B - Capsid
A - Pseudopodia, B - Mucilaginous sheath
