True
False
the answer for this is false
B) Inoculate infected amphibians with Jl, and determine whether the amphibians recover from infection by chytrids.
C) Take infected amphibians and assign them to two populations. Leave one population alone; inoculate the other with Jl. Measure the rate at which infection proceeds in both populations.
D) Take infected amphibians and assign them to two populations. Inoculate one population with a high dose of Jl; inoculate the other with a low dose of Jl. Measure the survival frequency in both populations.
Answer:
C: Take infected amphibians and assign them to two populations. Leave one population alone; inoculate the other with Jl. Measure the rate at which infection proceeds in both populations.
Explanation:
In scientific investigations, the best way to determine the effect of certain experimental factor on the population of study is to have a baseline for comparison. This is usually referred to as controlled experiment.
In the case of the observation that chytrid infection in amphibians seems to be inhibited by Janthinobacterium lividum, the best way experimental design is to get a population of amphibians suffering from the disease, divide them into two groups and subject them to the same conditions except the introduction of Janthinobacterium lividum to the skin of one of the groups.
A suitable method can thereafter be employed to measure the rate at which infection proceeds in both population. If indeed, the bacterium has the capacity to inhibit the infection, the rate of infection in the group with the bacterium will be significantly less than that of the group without the bacterium.
The correct option is C.
b. 2
c. 3
d. 4
a. specialized vascular tissue.
b. absorption alone.
c. absorption and transpiration.
d. osmosis and diffusion.
b. Coral reefs provide aquatic organisms with resources but derive no benefits in return.
c. Coral reefs provide resources for aquatic organisms and derive resources from other organisms as well.
d. Aquatic organisms live independently of coral reefs.
The correct answer is - c. Coral reefs provide resources for aquatic organisms and derive resources from other organisms as well.
The corals are essential part of the marine ecosystems. They are feeding upon zooplankton, but also their polyps get sugar that is produced by the algae living on them. Also, the corals provide much needed shelter for lots of marine animals, but also are on the menu of some, like the starfish for example.
B. He flogged them if they refused to eat it.
C. He tried new recipes every week until he found one they liked.
D. He showed them what a man very sick with scurvy looked like
Answer:
It's B
Explanation:
I got right