Please answer both mcq. a. Outdoors, the air temperature is 5 °C (44 °F) and the
ID: 57360 • Letter: P
Question
Please answer both mcq.
a. Outdoors, the air temperature is 5 °C (44 °F) and the relative humidity is 70%. What is the relative humidity of the air if it is drawn indoors and heated to 20 °C (68 °F)? Assume that no water vapor is added to or removed from the air. (This is the situation with heating homes in the winter season.)
Either 23, 26, 72, or 43%
b.
Epideictic pheromones help ensure that fruit flies of the Family Tephriditae…
will find preferred fruit hosts.
will easily find mates.
will be stimulated at the right time to oviposit fertilized eggs.
will have a better chance of survival by dropping to the ground to avoid predators.
will have sufficient food resources for their larval offspring.
A.will find preferred fruit hosts.
B.will easily find mates.
C.will be stimulated at the right time to oviposit fertilized eggs.
D.will have a better chance of survival by dropping to the ground to avoid predators.
E.will have sufficient food resources for their larval offspring.
Explanation / Answer
a. 43%. RH decreases with increase in temperature. Since the temperature is not very hot and not above 30, we can assume that the RH is 43%.
b. Option E.
The eggs are laid in plant tissue, or fruit, flowers or seeds. This ensures that the larvae have sufficient to eat when they develop