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BIOLOGY MCQs

Total Questions : 2561 | Page 255 of 257 pages
Question 2541. Which statement best describes Arteries?
  1.    They have thin walls and transport blood away from the heart
  2.    They have thick walls and transport blood toward the heart
  3.    They have thin walls and transport blood toward the heart
  4.    They have thick walls and transport blood away from the heart
 Discuss Question
Answer: Option D. -> They have thick walls and transport blood away from the heart
Question 2542. In plants, chloroplasts are necessary for 
  1.    photosynthesis
  2.    storage
  3.    cell movement
  4.    respiration
 Discuss Question
Answer: Option A. -> photosynthesis
Question 2543. The term facultative anaerobe refers to an organism that
  1.    Uses oxygen or grows without oxygen.
  2.    Requires less oxygen than is present in air.
  3.    Prefers to grow without oxygen.
  4.    Is killed by oxygen.
 Discuss Question
Answer: Option A. -> Uses oxygen or grows without oxygen.
Question 2544. Which feature do Prokaryotic and Eukaryotic cells share
  1.    Nucleus
  2.    DNA
  3.    Nuclear membrane
  4.    Membrane bound Organelles
 Discuss Question
Answer: Option B. -> DNA
Question 2545. Select the correct statement about oxygen transport in blood
  1.    A 50% oxygen saturation level of blood returning to the lungs might indicate an activity level higher than normal
  2.    During normal activity, a molecule of hemoglobin returning to the lungs carries one molecule of O2
  3.    During conditions of acidosis, hemoglobin is able to carry oxygen more efficiently
  4.    Increased BPG levels in the red blood cells enhance oxygen-carrying capacity
 Discuss Question
Answer: Option B. -> During normal activity, a molecule of hemoglobin returning to the lungs carries one molecule of O2
Question 2546. Control processes depend on which part of the brain
  1.    hypothalamus
  2.    amygdala
  3.    cerebellum
  4.    prefrontal cortex
 Discuss Question
Answer: Option D. -> prefrontal cortex
Question 2547. Select the correct statement about the ureters
  1.    The ureter is innervated by parasympathetic nerve endings only.
  2.    Ureters contain sphincters at the entrance to the bladder to prevent the backflow of urine.
  3.    The epithelium is stratified squamous like the skin, which allows a great deal of stretch.
  4.    The ureters are capable of peristalsis like that of the gastrointestinal tract.
 Discuss Question
Answer: Option D. -> The ureters are capable of peristalsis like that of the gastrointestinal tract.
Question 2548. Which best summarizes the concept of natural selection?
  1.    the fittest organisms survive and reproduce
  2.    an organism will always adapt to its environment
  3.    an organism will always mutate to survive
  4.    a mutation always makes a species fitter
 Discuss Question
Answer: Option A. -> the fittest organisms survive and reproduce
Question 2549. All of the following are true of neurons except that
  1.    they conduct a nervous impulse
  2.    they are a very specialized form of connective tissue
  3.    thay are separated from one another by synapses
  4.    When mature, they lose ability to divide
 Discuss Question
Answer: Option B. -> they are a very specialized form of connective tissue
Question 2550. Sponges are most accurately described as
  1.    marine predators
  2.    chemoautrophs
  3.    filter feeders
  4.    freshwater scavengers
 Discuss Question
Answer: Option C. -> filter feeders

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