B.
Deforestation affects ecosystems on land. there are no forests underwater
Given that an average human has a heart rate of 70 beats per minute and if one is to have a 70 year life span, the number of times it will beat is 2,575,440,000 times. This was computed by multiply 70 years by 365 days/year x 24 hours/day x 60 minutes/hour x 70 beats/min. Thus, the heart will beat numerous times before it finally stops.
Answer:
Option D, A subject is observed both before and after two exposures to the treatment.
Explanation:
In A-B-A-B design the alphabets have following meaning
a) First A – It is the baseline value or the value measured before treatment
b) First B – It is the treatment measurement
c) Second A - It is the withdrawal of treatment
d) Second B – It is the reintroduction of treatment
The second A is known as the reversal phase in which the intervention is withdrawn to see if the target behavior returns to the baseline behaviour
Thus , there are two measurements involved one before the intervention and second after the intervention
Option D is correct
Based on the information in the table,
- the enzyme which is not functioning in the strain of mold is Enzyme Z which is responsible for the conversion of Citrulline to Arginine.
- the substance that would begin accumulating in the mold is Citrulline since it is not being converted to Arginine.
<h3>What are enzymes?</h3>
Enzymes are organic catalysts that speed up the chemical reactions occurring in the body.
Enzymes are very essential in most metabolic reactions occurring in the body.
The deficiency or inactivity of an enzyme in the body will lead to an accumulation of the substrate on which the enzyme acts on.
Based on the information in the table,
- the enzyme which is not functioning in the strain of mold is Enzyme Z which is responsible for the conversion of Citrulline to Arginine.
- the substance that would begin accumulating in the mold is Citrulline since it is not being converted to Arginine.
in conclusion, enzymes are important for biochemical reactions.
Learn more about enzymes at: brainly.com/question/17231569
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