Fill in the blanks
(a) Plants are called as ______ because they fix carbon dioxide.
(b) in an ecosystem dominated by trees, the pyramid (of numbers ) is ______type.
(c) In aquatic ecosystem, the limiting factor fro the productivity is _______
(d) Common detritivores in our ecosystem are _______
(e) The major reservoir of carbon on earth is _______

Fill in the blanks :(a) A number which has only two factors is called a ______.(b) A number which has more than two factors is called a ______.(c) 1 is neither ______ nor ______.(d) The smallest prime number is ______.(e) The smallest composite number is _____.(f) The smallest even number is ______.

Read the following statements and choose the option which is the set of correct statements. (a) sun is the source of energy for grazing food chains. (b) in aquatic ecosystem, DFC is the major conduit of energy flow (c) some organism of DFC become prey for GFC animals. (d) ecosystem can support unlimited number of trophic levels.

Assertion : Broadly utilitarian arguments say that we should conserve biodiversity because biodiversity plays a major role in many ecosystem services that nature provides. Reason : Expolration of molecular, genetic and species level diversity to obtain the products of economic importance is include under broadly utilitarian category. (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c) If assertion is true but reason is false. (d) If both assertion and reason are false.

Fill in the blanks (a) In a chemical reaction, the sum of the masses of the reactants and products remains unchanged. This is called ————. (b) A group of atoms carrying a fixed charge on them is called ————. (c) The formula unit mass of Ca3 (PO4)2 is ————. (d) Formula of sodium carbonate is ———— and that of ammonium sulphate is ————

How many statements/s are true ? A. Temperature is the most relevant ecologically environmental factor. It ranges from subzero levels in polar areas and high altitudes to gt50^@C in tropical deserts in summer. B. A few organisms can tolerate and thrive in a wide range of temperature they are called eurythermal. C. The productivity and distribution of plants are also heavily dependent on water . D. In the aquatic environment , the sediment characteristics often determine the type of benthic animals that can thrive there.

Fill in the blanks (a) Five kingdom classification of living organisms is given by ……… . (b) Basic smallest unit of classification is ……. . (c ) Prokaryotes are grouped in kingdom ……. . (d) Paramecium is a Protista because of its ....... . (e) Fungi do not contain ....... . (f) A fungus..... can be seen without microscope. (g) Common fungi used in preparing the bread is ....... . (h) Algae and fungi form symbiotic association called ....... .

C_(4) Plants differ from C_(3) plants with respect to (a) First product (b) Substrate which accepts carbon dioxide (c) Number of A T P molecules consumed (d) All the above

Fill up the blanks. I) Genes of plants, bacteria, fungi and animals have been changed by manipulations therefore these organisms are called ...A... II) The organisms in which foreign genes have been introduced by genetic engineering are called ...B... The foreign genes change the host cell genetically such genes are known as ...C... and the production of transgenic organism is called ...D.... III) Bt cotton was first cultured to kill ...E... A to E in the above statements can be identified as

Fill in the blanks. (a) Fungi shows ……. Mode of nutrition. (b) Cell wall of fungi is made up of …… . (c ) Association between blue green algae and fungi is called as ……. . (d) Chemical nature of chitin is …….. . (e) ….... has smallest number of organisms with maximum number of similar characters. (f) Plants without well differentiated stem, root and leaf are kept in ....... . (g) ........ are called as amphibians of the plant kingdom.

Consider the following statements each with one or two blanks. (i)Each pectoral girdle consists of a (A) and (B) . (C) is a condition of rapid spasms (wild contractions) in muscle due to low Ca^(++) in body fuild. Each organised skeletal muscle in our body is made of a number of (D) held together by a common collagenous connective tissue layer called (E) . Which one of the following options correctly fills the blannks in any two the statements ?