21. What is the cork cambium, cork cell, and phelloderm collectively called?
[A] periderm
[B] lenticels
[C] abscission
[D] cytokinin
Show Answer
Correct Answer: A [periderm]
Notes:
The cork cambium, cork cell and phylloderm are collectively called the periderm. The periderm substitutes for the epidermis in mature plants.
22. What is the function of strigolactone?
[A] promote seed germination in some species
[B] inhibit lateral apical development in the absence of auxins
[C] establishment of mycorrhizae
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Strigolactones promote seed germination in some species and inhibit lateral apical development in the absence of auxin. Strigolactones also play a role in the establishment of mycorrhiza as well as a mutualistic association between plant roots and fungi.
23. What does a plant need to survive?
[A] sunshine
[B] nutrients
[C] water
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
A plant needs sunshine, nutrients, and water to survive. Plants provide food, medicine, shelter, and the oxygen we need to breathe.
24. Radish is an example of which of the following root?
[A] Conical roots
[B] Fusiform roots
[C] Napiform roots
[D] Tuberous roots
Show Answer
Correct Answer: B [Fusiform roots]
Notes:
Radish is an example of Fusiform roots. Fusiform roots swell in the middle and become thinner towards both ends.
25. The hippocampus (sea horse) belongs to the class?
[A] Agnatha
[B] Chondrichtyes
[C] Osteichthyes
[D] Mammalia
Show Answer
Correct Answer: B [Chondrichtyes]
Notes:
The hippocampus (sea horse) belongs to the class Chondrichthyes. Chondrichthyes are a class of jawed fish with a cartilaginous skeleton.
26. The part of the body that turns into feathers in birds?
[A] Hindlimb
[B] Forelimb
[C] Pelvic girdle
[D] None of the above
Show Answer
Correct Answer: B [Forelimb]
Notes:
The part of the body that turns into feathers in birds is Forelimb. The forelimbs of birds turn into feathers which help them to fly.
27. A sheep belongs to which of the following taxa?
[A] Mammalia
[B] Chordata
[C] Artiodactyla
[D] all of the above
Show Answer
Correct Answer: D [all of the above]
Notes:
Sheep belong to Phylum of Chordata, Class of Mammalia, Order of Artiodactyla, and Family of Bovidae.
28. Where is heparin derived from?
[A] intestines of pigs
[B] intestines of goats
[C] intestines of cows
[D] intestines of dogs
Show Answer
Correct Answer: A [intestines of pigs]
Notes:
Heparin comes from the intestines of pigs that are slaughtered for meat. Heparin is an important anticoagulant.
29. The ________ is responsible for why you would feel something touch your hair.
[A] Root Hair Plexus
[B] Hair Follicle
[C] Hair Root
[D] None of the options
Show Answer
Correct Answer: A [Root Hair Plexus]
Notes:
A hair plexus or root hair plexus is a specialized group of nerve fiber endings and acts as a very sensitive mechanoreceptor for tactile sensation.
30. What is the speed of nerve impulses?
[A] 60 m/s
[B] 0.5 – 130 m/s
[C] 10-30 m/s
[D] 50 -150 m/s
Show Answer
Correct Answer: B [0.5 – 130 m/s]
Notes:
The speed of nerve impulses is 0.5 – 130 m/s. A nerve impulse or action potential is an electrical signal. It travels through the membranes of neurons.
