<span>Exposure to mutagenic agents</span>
Answer:
Explanation:
The O-F glucose test (oxidative-fermentation) is used to determine whether an organism is performs oxidative or fermentative metabolism.
Oxidative metabolism (i.e respiration) takes place in the presence of oxygen while fermentative takes place in the absence of oxygen.
Facultative anaerobes can carry out both fermentation and respiration.
The O-F medium has glucose, peptones and a pH indicator. When the pH of the medium is acidic, that is glucose has been broken down, the medium turns yellow. When it is basic, it turns blue implying that peptone and not glucose had been broken down.
The sealed tube is overlaid with oil so as to prevent oxygen from getting in, making it anaerobic.
The unsealed tube allows oxygen.
Enterics would be yellow is both tubes because they are facultative anaerobes and can grow in the presence or absence of oxygen, hence they carry out both respiration and fermentation.
Answer:
the frequency of individuals with Type B blood in the population is 0.1977
Explanation:
Given:
Frequency of A allele is p = 0.24
Frequency of the individuals with blood type O is r = 0.38
Question: What is the frequency of individuals with Type B blood in the population, fB = ?
You need to apply the Hardy-Weinberg Equilibrium:
p²+q²+r²+2pq+2pr+2qr = 1
Here,
p, q and r are the frequencies of the alleles
Calculating the frequency of the allele q:
q = 1-p-r = 1-0.24-0.6164 = 0.1436
Frequency of individuals with type B blood:
Answer:
A. Rivers
Explanation:
because most of the water comes from two big rivers
