in triangle abc above an=ace is the midpoint of ac show that bf=ce
Answers
Answer:explanation of A.
c) If A is true but R is false.
d) If both A and R are false.
33. Assertion (A): A simple tissue is made of only one type of cell.
Reason (R): Various simple tissues in plants are Parenchyma, Collenchyma and Sclerenchyma.
a) If both A and R are true and R is the correct explanation of A.
b) If both A and R are true but R is not the correct explanation of A.
c) If A is true but R is false.
d) If both A and R are false.
34. Assertion (A): Cell is the fundamental unit of life.
Reason (R): Every organism is made of cells.
a) If both A and R are true and R is the correct explanation of A.
b) If both A and R are true but R is not the correct explanation of A.
c) If A is true but R is false.
d) If both A and R are false.
35. Assertion (A): The cytoplasm is the main arena of cellular activities in both plant and animal cells.
Reason (R): Various chemical reactions occur in it to keep the cell in living state.
a) If both A and R are true and R is the correct explanation of A.
b) If both A and R are true but R is not the correct explanation of A.
c) If A is true but R is false.
d) If both A and R are false.
36. Assertion (A): The cells of connective tissues except blood are made of fibres.
Reason (R): Fibre provides strength, elasticity and flexibility to the tissue.
a) If both A and R are true and R is the correct explanation of A.
b) If both A and R are true but R is not the correct explanation of A.
c) If A true but R is false.
d) If both A and R are false.
37. Assertion (A): The muscles of heart are involuntary.
Reason (R): Muscles of heart contract and relax throughout the life without fatigue.
a) If both A and R are true and R is the correct explanation of A.
b) If both A and R are true but R is not the correct explanation of A.
c) A is true but R is false.
d) If both A and R are false.
38. Assertion (A): Muscles contain contractile protein.
Reason (R): Contractile protein helps to cause movement.
a) If both A and R are true and R is the correct explanation of A.
b) If both A and R are true but R is not the correct explanation of A.
c) A is true but R is false.
d) If both A and R are false.
39. Assertion (A): Chloroplast are called kitchen of the cell.
Reason (R): Plants prepare their own food by photosynthesis.
a) If both A and R are true and R is the correct explanation of A.
b) If both A and R are true but R is not the correct explanation of A.
c) A is true but R is false.
d) If both A and R are false.
40. Assertion (A): Epidermal tissues have no intercellular spaces.
Reason (R): Epidermal tissues give protection against loss of water and mechanical injuries.
a) If both A and R are true and R is the correct explanation of A.
b) If both A and R are true but R is not the correct explanation of A.
c) A is true but R is false.
d) If both A and R are false.
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