Answer: D. traits
Explanation: Every trait is controlled by at least a pair of gene, one inherited from the mother while the other inherited from the father . An allele is a variant form of a gene that controls a trait. Every gene that controls a trait is made up of at least two alleles. An allele can be dominant or recessive for example, T is a dominant allele for tall height while t is a recessive allele for short height. If a woman with a genotype of Tt crosses with a man with a genotype of Tt, a child that inherited a (T) allele from the mother and a (T) allele from the father and have a genotype (TT) will have a different trait from his sibling that inherited a (t) allele from the mother and a (t) allele from the father and have a genotype of (tt). The child who has a genotype of TT will be tall while his sibling with genotype of tt will be short. This is because each of them inherited different set of allele from the same parents.
<h2>Option a) is correct</h2>
Explanation:
Growing improved crop plants that have nitrogen fixing enzymes
- Nitrate pollution occurs because of the introduction of excessive amounts of nitrogen to ground water and surface water
- Use of synthetic fertilizers has resulted in high levels of pollution and eutrophication of lakes and rivers
- When nitrogen fertilizers are leached deep down into the soil they cause serious pollution problems
- Plants that can do nitrogen fixation include members of family Fabaceae
- The symbiotic association between legumes and Rhizobium is the most important nitrogen fixing association; rhizobia bacteria convert nitrogen gas to ammonia and this process is called nitrogen fixation
B! Is the answer welcome:))
Answer:
Option-C
Explanation:
The flow of nutrients from the sewage and industries is the cause of the nutrient pollution in water bodies. These chemicals get accumulated in the water bodies affecting the aquatic ecosystem to a very large extent.
The increased level of nitrogen and phosphorus causes eutrophication which is also known as algal-boom. These nutrients cause the massive growth of algae which decreases the oxygen level of the water bodies. This increases BOD level of the water bodies which does not allow the growth of other aquatic species.
As a result of this, the dead zones are created where nothing can survive and therefore is the correct answer.
Thus, Option-C is the correct answer.
Answer:
A pesar de algunas observaciones tempranas de bacterias y células, el microscopio impactó otras ciencias, especialmente la botánica y la zoología, más que la medicina. Importantes mejoras técnicas en la década de 1830 y posteriormente corregir la mala óptica, transformando el microscopio en un poderoso instrumento para ver los microorganismos causantes de enfermedades.
Explanation:
