Which of the following organisms is NOT ultimately dependent on the sun as a sou

Question

Which of the following organisms is NOT ultimately dependent on the sun as a source of energy? A. a night-blooming flower is pollinated by night-flying bats B. an underground earthworm avoids the sun C. a cave fish feeds on debris that washes down to it D. all of the choices ARE ultimately dependent on the sun E. all of the choices are NOT ultimately dependent on the sun Lemon juice has a pH of 2 and tomato juice has a pH of 4 This means that: A. lemon juice is less acidic than tomato juice B. tomato juice has 100 times more H+ ions than lemon juice C. lemon juice has 100 times more H* ions than tomato juice D lemon juice has 4 times more H+ ions than tomato juice E. both A and B The major primary function of the human pulmonary circulation is: A. nutrient exchange B. release of oxygen and absorption of carbon dioxide by the blood C. release of carbon dioxide and absorption of oxygen by blood D. to supply the force to propel blood throughout the body E. none of the above Which type of tissue lines body cavities and covers body surfaces? A. muscle tissue B. nervous tissue C. epithelial tissue D. connective tissue E. both A and D The pacemaker of the human heart is the: A atrioventricular node B. sinoatrial node C. medulla oblongata D. Purkinje fibers If a reaction results in one molecule losing an electron, the molecule becomes: A. oxidized B. reduced C. ionized D. both A and C The flat shaped cells found in the epidermis of the skin ate. A. cuboidal B. spherical C. squamous D. columnar

Explanation / Answer

.1.E:All of the choices are ultimately not dependent on sun because they are adapted to such environmental conditions. For example the night blooming flowers are pollinated by bats ,so they do not require sun as enery source.

Earthworm seldom comes out from soil because if sunrays fall on them their skin can become dry which causes them to get paralyzed.

2.C:Lemon juice has 100 times more H+ ions than tomato juice because the ph of lemon juice is 2 and the PH of tomato juice is 4 according to Ph meter Ph of 2 means that 100 more H+ concentration than Ph of 4.

4.C:Epithelial tissue lines the cavities and surface of blood vessels and organs throughout the body

3.C Release of Carbondioxide and absorption of oxygen from blood.

5.B:SA node is the hearts natural pace maker which sends regular electric impulses from top chambers causing it to contract and pump blood into the bottom chamber.

6.D:Both A and C :As it results in one molecule due to the loss of one electron and becomes oxidised and ionised because it dosenot have futher molecules to loose or gain .

7.C: Squamous .

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