Tag: species, communities and ecosystems
Questions Related to species, communities and ecosystems
Which of the following is called the walking fern?
-
Selaginella
-
Adiantum
-
Equisetum
-
Psilotum
Roundworms belong to the phyla
-
Nematoda
-
Porifera
-
Platyhelminthes
-
None of these
Approximately how many cells are present in the boy of an adult person?
-
$10^{14}$
-
$10^{15}$
-
$10^{18}$
-
$10^{21}$
An adult human being has approximately 100 000 billion cells, all originating from a single cell, the fertilized egg cell.
Cotyledon is also known as
-
Seed leaves
-
Endosperm
-
Embryo
-
None of the above
Which character of pteridophytes is not similar to bryophytes?
-
Water requirement for fertilization
-
Dependence of sporophyte on gametophyte
-
Heterospory
-
None of these
- Bryophytes are known as the amphibians of plant kingdom because they need water for fertilisation. The sperms of bryophytes are flagellated and reach the eggs by means of swimming in water. On the other hand, pteridophytes do not need water for fertilisation.
- Bryophytes have gametophyte as dominant phase of life on which sporophyte is dependent whereas Pteridophytes have sporophyte as dominant phase but sporophyte is not dependent on gametophyte.
- Heterospory is the formation of two types of spores which are different in size i.e. large spores and small spores. Large spores are called megaspores while small spores are called microspores. Spores are formed by the sporophyte both in bryophytes and pteridophytes.
Which of the following is an edible fungus?
-
Mushroom
-
Cabbage
-
Pea
-
Rhizobium
A taxonomic group of closely related genera is known as?
-
Species
-
Order
-
Family
-
Class
Midrib is present in leaves of
-
Monocots
-
Bryophytes
-
Pteridophytes
-
None of these
Which one of the following is not one of the three aspects studied in biogeochemical cycling?
-
The nature and size of natural reservoir
-
The rate of movement between reservoirs
-
Interaction between different biogeochemical cycles
-
Creation of their own biogeochemical cycles by new species
The reservoir for the gaseous type of biogeochemical cycle exists in.
-
Stratosphere
-
Atmosphere
-
Ionosphere
-
Lithosphere
The reservoir for gaseous type of nutrient cycles, e.g., nitrogen, carbon cycle exist in the atmosphere.