Answer:
Women who carry one copy of the mutated gene still have normal color vision because they have another copy, which is not mutated, in the other X chromosome that will be the dominant one. As a result, the women are carriers of the mutated gene but not color blind.
Explanation:
Colorblindness is a sex-linked mutation. A woman has two X chromosomes, while a man has one X chromosome and one Y chromosome. The mutated gene that causes color blindness is on the X chromosome, and it is OPN1LW. So if a woman has one mutated OPN1LW in one of her two X chromosomes, the OPN1LW gene in the other X chromosome will be the dominant one stopping the woman from being colorblind.
In the case of men, as they only have one X chromosome, if there is a mutation on the OPN1LW in the X chromosome, the men will be colorblind because there is no extra copy of the gene, as it is in women.
Answer:
Explanation:
1) Excitation brings about contraction.
2) Contraction leads to an increase in blood pressure.
3) Changes in blood pressure results in the opening and closing of the heart valves.
4) The opening and closing of heart valves then regulates the flow of blood and it's volume.
Answer: A.) The nitrogen cycle recycles nitrogen through an ecosystem, making it available to all organisms.
Explanation: Nitrogen is an essential nutrient for plants and a significant component of proteins, which all animals need to grow, reproduce and survive. The nitrogen cycle converts nitrogen into compounds that plants and animals can use.
Answer: the rabbit
Explanation:
In ecology, biomass refers to the mass of organisms living within a specific region at a time. Biomass is measured and usually described as:
- the total mass of the organisms within a community
- the average masses per unit area
Typically, more numerous organisms, such as producers, have a higher average biomass. This may include plants, animals or microbes such as bacteria and fungi. In terrestrial environments, biomass is distributed in pyramid form; the carnivorous hawk preys on rabbits and birds, which are nearer to the base of the pyramid- each predator population would have a lower biomass than its prey.
The birds weigh 100 grams while the rabbit weighs 150 grams.The rabbit has a higher total mass
