Question 11 Mark…………. proposed the theory of the survival of the fittest.AnswerCharles DarwinView full question & answer→
Question 21 Mark…………. is not a sudden process, it is gradual and continuous.AnswerAdaptationView full question & answer→
Question 31 MarkSpring like …………. on the stems of some climbers are examples of their adaptation.AnswerTendrilsView full question & answer→
Question 41 MarkDesert plants are either leafless or their leaves are like …………. or modified into …………. .Answerneedles, thornsView full question & answer→
Question 81 MarkFish have …………. within the body to help them to float.Answerair bladdersView full question & answer→
Question 101 MarkFungi do not have …………. so cannot perform photosynthesis.AnswerchlorophyllView full question & answer→
Question 111 MarkDodder has …………. roots for absorbing nutrients from the host plant.Answerhaustorial (sucking)View full question & answer→
Question 121 MarkPlants need …………., …………. and …………. for growth.Answernitrogen, phosphorus, potassiumView full question & answer→
Question 131 Mark…………. are found in hilly areas as well as plains.AnswerVast meadowsView full question & answer→
Question 141 MarkGrasses in the …………. region are very tall.AnswerequatorialView full question & answer→
Question 151 Mark…………. roots of grasses prevent soil erosion.AnswerFibrousView full question & answer→
Question 161 MarkThe stems of desert plants are green as they perform …………. in the absence of leaves.AnswerphotosynthesisView full question & answer→
Question 171 MarkLeaves of desert plants are modified into …………. .AnswerthornsView full question & answer→
Question 181 Mark…………. in stems and …………. of aquatic plants are useful for floating in water.AnswerAir spaces, petiolesView full question & answer→
Question 191 MarkLeaves of some aquatic plants are …………. and …………. ike a ribbon.Answerthin, slenderView full question & answer→