Read the following statements and find out the correct statement.
a. urinary bladder is absent in fishes.
b. gambusia fish eradicates mosquito larva
c. ampulla of lorenzini present in dog fish act as thermoreceptors.
d. electric organs are modified muscles.

Read the following statements and find out the incorrect statements. a. All vertebrates and a few invertebrates have a closed circulatory system. b. Hyperension leads to heart disease and slso affects vital organs like brain and lungs. c. CAD affects the vessels that supply blood to the skeletan muscles. d. In angina, a symptom of chronic chest pain appears when no enough oxygen is reaching the heart muscle. e. Heary attack means the state of heart when it is not pumpin blood effectively enough to meet the needs of the body.

Read the following statements and find out the correct statements. (a) Mitochondrion is typically sausage shaped or cylindrical (b) The inner compatment of the mitochondrion is called stroma and of chlorplast is called matrix (c ) Chromoplasts have fat insoluble carotenoid pigments like carotene and xanthophylls (e) Plastids are found in all plant cells and euglenoids

Read the following statements carefully and find the incorrect statements: A. More than 1 percent impurities make domestic sewage unfit for human use. B. Less BOD causes mortality of fish and other aquatic creatures. C. Presence of large amounts of nutrients in water also causes excessive growth of planktonic algae, called an algal bloom. D. Algai bloom causes deterioration of the water quality an decreases fish mortality. E. Some bloom-forming algae are extremely toxic to human beings and animals. F. Eichhornia crassipies is the world's most problematic aquatic weed.

Read the following statements carefully and find the incorrect statements: A. More than 1 percent impurities make domestic sewage unfit for human use. B. Less BOD causes mortality of fish and other aquatic creatures. C. Presence of large amounts of nutrients in water also causes excessive growth of planktonic algae, called an algal bloom. D. Algai bloom causes deterioration of the water quality an decreases fish mortality. E. Some bloom-forming algae are extremely toxic to human beings and animals. F. Eichhornia crassipies is the world's most problematic aquatic weed.

Read the following statements and find out the correct statements. A. Tracheids are elongated or tube like cells with thin and lignified walls and tapering ends. B. Vessal elements are interconnected through perforations in their common walls. C. Xylem fibres are always septate.

Read the following statements and find out the correct statements. A. Tracheids are elongated or tube like cells with thin and lignified walls and tapering ends. B. Vessal elements are interconnected through perforations in their common walls. C. Xylem fibres are always septate.

Which of the following statement are not true about shark? a. The skin is tough and covered with placoid scales. b. They possess a swim bladder which regulates buoyancy. c. the tail of shark is heterocercal. d. Ampulla of lorenzini present in the snout of shark is thermoreceptor. e. it has five pairs of gill slits covered by operculum.

Which of the following statement are not true about shark? a. The skin is tough and covered with placoid scales. b. They possess a swim bladder which regulates buoyancy. c. the tail of shark is heterocercal. d. Ampulla of lorenzini present in the snout of shark is thermoreceptor. e. it has five pairs of gill slits covered by operculum.