Lab Practical Exam

Question 1

What is the cortex?

Answer 1

The outer layer of the thallus or stem, consisting of fungal hyphae in lichens

Question 2

What is the thallus?

Answer 2

a vegetative plant body lacking differentiation

• the lichen body consisting of both fungus and algae

Question 3

What is crustose fungi?

Answer 3

Thallus forms a thin, flat crust that cannot be removed from the substrate

Question 4

What is foliose fungi?

Answer 4

Thallus is flat with leaf-life lobes, has an upper and lower surface

Question 5

What is fruticose fungi?

Answer 5

Thallus is attached to the substrate at the base only and grows vertically

• some are shrub-like, others are strand-like or hair-like in growth

Question 6

What is pendulous?

Answer 6

hanging down forming a long slender thallus

Question 7

What is propagule?

Answer 7

a reduced bud, branch, or leaf serving in asexual reproduction

Question 8

What is prostrate?

Answer 8

Lying flat on the surface

Question 9

What is soredia?

Answer 9

small, powdery propagule that contains several large algae cells and fungal hyphae, originating in the algal layer and breaking through the cortex of a lichen.

Question 10

What is n in statistics?

Answer 10

Number of data points, the sample size

Question 11

What is t in statistics?

Answer 11

the test statistic (t-value)

Question 12

what is x-bar in a t-test?

Answer 12

the mean of one sample

Question 13

What is s(2) in a t-test?

Answer 13

The variance within a sample

Question 14

How do you interpret the result of a t-test?

Answer 14

If the p-value is smaller than the alpha level, then you can reject the hypothesis.

• if the p-value is less than 0.05, then that result is said to be statistically significant.