From the give statements about washing soda. Select the correct one:
Can be prepared by Haber's process
It is a water softening agent
Used to manufacture Borax
Its formula is `NaHCO_(3)`

Read the given statements about lichens and select the incorrect ones. (i) They represent an example of commensallism. (ii) Algal partner obtains water and mineral salts from the fungus and the fungal partner obtains food prepared by the aiga. (iii) These do not grow in polluted areas. (iv) The mycobiont is usually an Ascomycetes or a Basididiomycetes. (v) The phycobiont is mostly a green alga or a cyanobacterium. (vi) These constitute the pioneer community in case of hydrosere.

Read the following statements about 'Terror of Bengal' and select the correct ones. (i) 'Terror of Bengal' is the name given to water hyacinth (Eichhornia), an algae. (ii) Eichhornia was introduced in India due to its aesthetic value. (iii) Eichhornia drains oxygen from the water which leads to death of fishes.

Read the following statements and select the correct option. Statement (i)Pure water has the highest water potential, i.e. zero. Statement (ii)Process of diffusion does not require any input of energy. Statement (iii)Water moves from the system containing water at higher water potential to the one having lower water potential.

Read the following statements about asexual reproduction and select the correct ones. (i) It involves a single parent. (ii) It is slower than sexual reproduction. (iii) It produces progeny that are genetically identical with the parent but not with one another. (iv) The progeny of asexual reproduction can be termed as clones.

Read the following statements about WBCs and select the correct option 1) Lymphocytes are responsible for immune responses of the body 2) Basophils are least in number among white blood cells. 3) Eosinophils can engulf antigen-antibody complexes 4) Monocytes are the only phagocytic ceils of blood so that they are waited internal scavengers.

Read the given statements and select the option correctly stating which ones are true (T) and which ones are false (F). I. BCG vaccine gives protection against tuberculosis . II. Entamoeba histolytica resides in jejunum and ileum parts of the small intestine and is more common in females than males. III. Man is the primary host whereas sheep is the secondary host in life cycle of Ascaris lumbricoides. IV. Chemical formula of morphine is C_(17)H_(19)NO_(3) .

Study the following statements concerning food chains and select the correct ones. (i) Removal of 80% of tigers from an area resulted in greatly increased growth of vegetation. (ii) Removal of most of the carnivores resulted in an increased population of deer. (iii)The length of food chains is generally limited to 3-4 trophic levels due to energy loss. (iv) The length of food chains may vary from 2 to 8 trophic levels.

Study the following statements regarding food chains and select the correct ones. (i) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation. (ii) Removal of most of the carnivores resulted in an increased population of deers. (iii) The lenght of food chains is generally limited to 3-4 trophic levels due to energy loss. (iv) The lenght of food chains may vary from 2 to 8 trophic levels. A) i and ii B) ii and iii C) i and iii D) iii and iv

Read the following statements and select the correct option. Statement 1: Dental formula gives the number of teeth in the half of each jaw. Statement 2: Dental formula can be expressed for insectivorous mammals as well as for the nonmammalian vertebrates.

Consider the following four statements and select the correct option stating which ones are true (T) and which ones are false (F). (i) The scrotum acts as a thermoregulator, maintaining the testes at a temperature 2^(@) lower than that of the body (ii) Corona radiate layer of the ovum prevents polyspermy. (iii) Middle part of ear is derived from the endoderms layer. (iv) The hormone, human chorionic gonadotropin facilitates parturition by softening the connective tissue of the public symphysis.