Old Exam 2

Question 1

If a plant secretes chemicals to deter other plants, what pattern of distribution is it likely to have?

Answer 1

uniform

Question 2

If resource distribution is patchy what kind of distribution would a population have?

Answer 2

clumped

Question 3

If individuals in a population ignore each other what kind of distribution are they likely to have?

Answer 3

random

Question 4

At a large scale, what kind of population distribution is observed in plants and animals?

Answer 4

clumped (they are more dense in places with better resources)

Question 5

How does a chemosynthetic organism get energy and carbon?

Answer 5

energy from inorganic molecules; fixes CO2

Question 6

How do plants prevent being eaten by herbivores?

Answer 6

• tough leaves
• toxins in their leaves
• prickles or thorns
• nitrogen-poor

Question 7

aposematism

Answer 7

coloring that warns or repels predators

Question 8

T/F: subpopulations are connected by genetic drift

Answer 8

F

Question 9

What kinds of density-dependent factors limit population growth?

Answer 9

competition for food, disease, and mate availability

Question 10

In logistic population growth the ______ decreases as population density increases.

Answer 10

intrinsic rate of increase

Question 11

What kinds of things are correlated with seed size in plants?

Answer 11

dispersal strategy, seed number, survival rate of seedlings, and seedling growth rate

Question 12

population sink

Answer 12

birth rate lower than death rate

Question 13

How do plants allocate their resources to forage optimally?

Answer 13

with low light and high water they expand leaves; with high light and low water they expand roots