Answer: True
Explanation:
Tuberculosis(TB) is most common in developing countries where many people live in absolute poverty, than in developed countries.
In underdeveloped and developing countries people lack proper education on the spread of tuberculosis, they live and work in poorly ventilated and overcrowded conditions, which provide ideal conditions for TB bacteria to spread.
In developing countries where people have limited access to healthcare system, people with HIV who are more susceptible to TB, lack proper healthcare suffer from malnutrition and can't build a resistance to the disease. In this conditions TB is bound to spread.
Developed countries have largely controlled TB by improving the life of it citizens, provision of healthcare, education etc
When water<span> molecules </span>move <span>freely </span>across the cell membrane<span>, the </span>process<span> is </span>called osmosis<span>, which is just a special type of simple diffusion.</span>
The answer should be B. Ions
<h2>
The correct answer is: Both parent must be PP.</h2>
Explanation:
- The given question states that for flower color of the violet plants there are three phenotypes possible, purple, light purple and white.
- The flower color coding gene is governed by two variants or alleles in which there is an absence of complete dominance of one allele over the other as, if complete Mendelian dominance was there, only two phenotypes for flower color would have existed, purple and white, without the existence of any intermediate color, light purple.
- This indicates the existence of a Non-Mendelian pattern of inheritance with respect to the gene encoding for the violet flower color.
- As the intermediate phenotype of flower color is light violet, it indicates that in these plants neither of the two alleles are capable of showing dominance and this is an example of Incomplete dominance.
- Let the two alleles of the flower color coding gene be: P and p.
- Then the possible genotypes are: PP, Pp, pp.
- The corresponding phenotypes are: Purple, Light purple and White.
- Crossing all possible parents,
1. P P
P PP PP
Phenotypes (Purple) (Purple)
P PP PP
Phenotypes (Purple) (Purple)
2. P P
P PP PP
Phenotypes (Purple) (Purple)
p Pp Pp
Phenotypes (Light Purple) (Light Purple)
3. P p
P PP Pp
Phenotypes (Purple) (Light Purple)
p Pp pp
Phenotypes (Light Purple) (White)
4. P P
p Pp Pp
Phenotypes (Light Purple) (Light Purple)
p Pp Pp
Phenotypes (Light Purple) (Light Purple)
5. P p
p Pp pp
Phenotypes (Light Purple) (White)
p Pp pp
Phenotypes (Light Purple) (White)
6. p p
p pp pp
Phenotypes (White) (White)
p pp pp
Phenotypes (White) (White)
- According to the results of the above crosses, we find that the plant breeder should use such parents which are homozygous for the P allele, that is, both the parents must have the PP genotype. Then only all the offspring produced by crossing these parents will develop purple colored violet only.
Answer:
The light reactions of photosynthesis use chemiosmosis to produce ATP that will be used in the Calvin cycle.
Explanation:
ATP is one of the most important compounds inside a cell because it is the energy transport molecule. ATP (Adenosine TriPhosphate) is considered a transporter of energy (photosynthesis) because when one of the phosphate groups is broken off, turning it into Adenosine DiPhosphate (the Tri means 3 phosphate groups, the Di means 2 phosphate groups). When a phosphate breaks off, through chemical reactions in a cell, energy (photosynthesis) is released which the plant uses for cellular processes.