Question 3636 Which one of the following statements concerni

Question 36.36. Which one of the following statements concerning biological clocks is false?

       innate circadian rhythms generally differ slightly from a 24 hour period
       circadian rhythms occur with or without external stimuli
       biological clocks are greatly influenced by external temperatures
       just like people, plants that are moved quickly over several time zones experience jet lag

Question 37.37. Christmas cactus is a short-day plant that usually blooms in the winter. Which of the following strategies might get it to bloom for the 4th of July?

       leaving it in a dark closet all night and part of each morning during June
       putting it in the refridgerator from time to time during June
       putting it in a cold basement every night during the early summer
       none of the choices will work

Question 38.38. You have a plant in a window but it seems to be growing irregularly. It seems to be bending toward the sunlight that shine through the window. This is an example of phototropism.

True
False

Question 39.39. The study of how animals use plants to medicate themselves is called ______.

       bioremediation
       zoopharmacognosy
       medicinozoology
       zoomedicine

Question 40.40. Both humans and plants exhibit circadian rhythms which are caused by periods of light and dark (or day and night).

True
False

Question 36.36. Which one of the following statements concerning biological clocks is false?

36. The sensitivity to light in plants exhibited as a cycle and this cycle is known as circadian rhythms. The circadian rhythms are the biological rhythms that complete a cycle of 24 hours. Circadian rhythms in plants are influenced by variation in temperature during day and night. The biological clock in humans is master clock controlling several physiological and metabolic processes. Biological clock is involved in sleep - wake cycle. Therefore, option 3 is correct.

37.

The long-day or short-day plants are not based on absolute day length but on the process controlled by photo periods in inducing the day lengths as longer or shorter known as the critical day length (CDL). A long-day plant is considered when its photo periodically controlled day is longer than the critical day length. A short-day plant is considered so because its photo periodically controlled process is shorter than the critical day length. To initiate flowering in a short day plant like Christmus cactus, it should be left in a dark closet all night and part of each morning during the month of June. Option 1 is correct.

38. The plants exhibit phototropism means growing towards light (positive phototropism) or away from light (negative phototropism). The phototropism occurs due to receptors present in the plasma membrane that respond to a specific wavelength of light. These receptors are known as photo receptors. The photo receptors are proteins containing pigment molecules. In phototropism the growth of plant may respond to blue wavelength of 400 – 500 nm of light. The given statement is true. Option 1 is correct.

39. The self medication of animals by using plants is called zoopharmacognosy. Some animals like apes, Chimpanzees and monkeys medicate themselves by eating some plant leaves to get rid of bacterial, viral and parasitic infections. Option 2 is correct.

40. Circadian rhythms are exhibited by plants, animals and humans. The sensitivity to light in plants exhibited as a cycle and this cycle is known as circadian rhythms. The circadian rhythms are the biological rhythms that complete a cycle of 24 hours. During which they are initiated or transition between darkness and light occur. The given statement is true. Option 1 is correct.

Question 36.36. Which one of the following statements concerning biological clocks is false? innate circadian rhythms generally differ slightly from a 24 hour

Question 3636 Which one of the following statements concerni

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