Name: Section \"-Group # Biology 142-Spring 2017 Survey Question Set 5 (10 point
ID: 205455 • Letter: N
Question
Name: Section "-Group # Biology 142-Spring 2017 Survey Question Set 5 (10 points) Ring-tailed coati occur in South America. They range from 4-16 lIbs. They are diurnal, found both in trees and on the ground, and they find their food in both places. They are related to raccoons. Their dental formula is: 31.3-3 3-1-3-3 1.(1 pt) What is the diet of this animal? Strict carnivore / strict herbivore /omnivore Use the 2 diagrams below to answer the following two questions: grasshopper pigeon The "generalired" digestive system of insects 2. (1 pt.) What is one structure/organ in the digestive tracts of birds and insects that demonstrates convergent evolution? NOTE: there are a couple of options. 3. (1 pt.) What is one reason both of these animals would have independently evolved this structure? 4. (4 pts.) For the following organisms, state one significant adaptation for feeding /digestion/ nutrient absorption. a. Parasitic roundworm: b. Venus fly trap (plant): c. Great white shark: d. Jellyfish:Explanation / Answer
Ans 1:
Ring tailed coati has a dental formula of 3-1-3-3/3-1-3-3, and it is an omnivore.
It eats plant parts, fruits , insects, small invertebrates, etc.
Ans2: Gizzard is a structure demonstrate convergence between insects and birds.
Other possible answer is "crop".
Ans3: Both these organisms have crop as a mechanism to store/process food temporarily. Both insects and birds have fast eating habit.
Ans4:
a) Parasitic roundworm has sucking mouth parts to attach to host, and they have reduced or absent digestive system.
b) Venus fly trap eats insects to compensate for lack of nutrients in the environment they grow.
C) Great white shark has short but broader esophagus to let it gulp down its prey as such.
d) Jelly fish can reduce the size of its medusa when food is in shortage, and increase the size of medusa when food is abundant.
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