Evolution 3

Question 1

HOW DOES ANTIBIOTIC RESISTANCE
DEVELOP?

Answer 1

A sick person starts a course of antibiotics, starts feeling better and then stops taking the medicine. ie does NOT COMPLETE the full course or takes WRONG antibiotic for the infection.

• Due to natural variation and chance mutations, bacteria develop mutations providing resistance to the antibiotic and survive the initial dose of antibiotic.
  The resistant bacteria reproduce rapidly and form a resistant population.
  Therefore, incorrect use of antibiotics causes the rapid evolution of a new antibiotic resistant strain.

Question 2

hominid

Answer 2

refers to the extinct bipedal ancestors of humans as well as
modern humans & African apes

Question 3

SIMILARITIES of HUMANS and
AFRICAN APES

Answer 3

• Large Brain compared to body size
  ­ allows for varying degrees of memory, emotions, rational thought.
• Eyes that look forwards with over­lapping visual fields, for stereoscopic vision ie. allows accurate distance and 3D vision.
• Reduced /absent snout + small nose
  ­ rely more on sight than smell
• Teeth ­ variety of teeth ­ for omnivorous diet
• Arms rotate freely in shoulder socket
  ­ allows wide range of forearm movement
• Fingerprints ie. ridges ­ more friction for
  better grasping of objects.
• Flat nails (not claws)
• Opposable thumbs for precision grip with index finger for to grasp branches; picking
  up small objects + manipulating tools