Question

19. A lichen is an association between: a. a fungus and an algae b. two different fungi living together c. a fungus and a plant d. a fungus and a moss 20. The Paramecium moves by means of a. pili b. flagella c. pseudopodia d. cilia 21. Prokaryotic organisms comprise two of the three Domains of life. These are: a. Protists and Eukarya b. Archaea and Eukarya c. Bacteria and Eukarya d. Bacteria and Archaea 22. An example of altruistic behavior is: a. worker honeybees defending the hive against an intruder b. a male songbird singing to attract a female c. a male sage grouse displaying brightly colored feathers d. a kitten batting around a leaf 23. An example of an amphibian is a: a. snake b. lizard c. salamander d. turtle 24. All of the following are adaptations for flight in birds EXCEPT: a. feathers b. reduced organs c. honeycombed bones d. teeth 25. A characteristic that bony fished HAVE and cartilaginous fish DO NOT is: a. an operculum b. closed circulatory system c. cephalization d. vertebral column 26. Cephalization is an important evolutionary adaptation which is first seen in the flatworms. Cephalization refers to: a. the development of organ systems b. the development of a body cavity c. the development of a heart d. the development of a head or anterior region with associated sense organs 27. Rhythmic activities that are organized around a 24 hour period (one day) are called: a. circadian b. circannual c. diurnal d. nocturnal 28. Hydras, jellyfish, corals and anemones belong to this phylum: a. Platyhelminthes b. Cnidaria c. Ctenophora d. Porifera

Answer 1

19.a. a fungus and an algae

The lichen is an symbiotic association between a fungus and Photosynthetic partner algae/ cyanobacteria. Lichen fungi make the symbiotic relationship to obtain the carbon (as a source of food) from the algae by photosynthesis.

20.d.CIlia

The small hair like structure called as cilia is present all over the body of paramecium that helps in the movement and capturing the food.It performs the whip lash movement by the help of cilia for propulsion.

21.d.Bacteria and Archaea

The three domain of life system includes - Archaea, bacteria and eukarya.The archaea and bacteria comes under prokaryotes as they are single celled with no nucleus.The Eukarya contains the membrane bound nucleus.

22. worker honeybees defending the hive against an intruder.

Altruistic behaviour refers to the behaviour which benefits the one individual and decreases the benefits of another.The working bees defend the hive against an intruder inspite of being not reproductive and don't get benefited.The male songbird sings to attract the female for mating, both gets benefited.The male sage grouse displays the brightly color feather to attract the dull color female for the mating purpose.The kitten batting around the leaf provides the extra fibers from the leaf.