Answer:
An experiment imposes treatment on the subjects, but an observational study does not
Explanation:
Observational studies are research studies in which an effect, process behaviour etc. are observed, without any change. For example, observation of the possible effect of a treatment on subjects.
On the other hand, experimental studies are studies in which the treatment is included. Experimental studies are randomized, meaning that subjects that are in experiment are randomly put to a treated group or a control group.
Answer: Zero Net Energy = Zero Net Emissions
Explanation: With the addition of renewable energy generation, a ZNE building's annual energy costs become negligible, and since there is a net-zero balance of energy production and use, your building's carbon footprint with respect to energy consumption would also approach zero.
The correct answer is: B) binding to their substrate
The catalytic mechanism of an enzyme starts when the substrate binds to its active site (specific region of an enzyme). There is a theory (lock and key) that explains the mechanism of this binding: the lock is the enzyme and the key is the substrate and only if they fit the enzyme will work. The binding of the substrate to the enzyme causes conformational changes of the enzyme, and as a result, products are formed. The products are then released from the surface of tat enzyme. The enzyme is regenerated for another reaction cycle.
The question is incomplete as the group of choices are not provided. However, a group of choices is given below:
A. Do the young hemlocks have a disease?
B. Are deer eating most of the young hemlocks
C. Did a lack of rain the hemlocks to stop producing?
D. Why were there so many deer in the forest?
Answer:
The correct answer is - option B Are deer eating most of the young hemlocks
.
Explanation:
By the observation made by the researcher about decreased young hemlocks and increased deer population in the last 5 year time period and findings of the deers that they like to eat young hemlocks, she can make observations and form the question.
On the following finding, she was able to make a question that the population of deer increased has led to the young Hemlock's population that the deer eat young Hemlocks.
Thus, the correct answer is - option B Are deer eating most of the young hemlocks
.