I would say the second option. Because colorblindness is regressive that means that there must not be a dominant genotype that replaces colorblindness. In most people there is a dominant genotype that replaces colorblindness which is simply being able to see color. So in me for example I might have a colorblindness genotype somewhere but since it is regressive (b) then it gets taken over but the color vision (B) remember that a dominant will always take over the regressive. the only way that someone can be color blind is if there are 2 regressive (b) genotypes that means there is no dominant genotype to take them over. Brown eyes is an Example of a dominant genotype that means that it will take over blue eyes (which is why there are most brown eyed people in the world)
I chose the second option because there is both X and Y and each one has either a B or a b the last option only had B.
But Remember that B > b
B trumps b
The complete question goes like this :
<span>Almost every major city in the world has a zoo. Humans have kept and enjoyed animals since the prehistoric times. Ancient Greeks and Romans kept small zoos. Over the past fifty years, zoos have changed remarkably. Today zoos provide the animals with larger and more natural habitats.
</span><span>Which sentence could be added to the passage as a supporting detail?
</span>The correct answer is <span>A) Zoos also provide great research facilities
This sentence is adding more information directly related to the state of the zoo in modern times. Besides the educational and entertaining purposes, the zoos are now becoming important centres for research and places for developing conservation strategies for endangered animals. All of the other sentences are not relevant to the importance and characteristic of modern-day zoos. </span>
D. Chloroplast is only found in plant cells not in animal cells
Answer:
Reading from the bottom the sequence of nitrogenous base is TCGA.
Nitrogenous bases are molecules containing nitrogen and carbon which are present in DNA or RNA. Nitrogenous bases are of two types namely purines (adenine and guanine) and pyrimidines (cytosine, thymine or uracil). The bases may be attached to the sugar to form nucleosides. The attachment of phosphate to the nucleoside forms nucleotide which is the basic composition of nucleic acids.
Characid fishes arose prior to the separation of the African and South American continents us the most likely explanation of this distribution pattern.
<h3>What is
Characid fishes?</h3>
- The family Characiformes, sometimes known as the characids or characins, includes freshwater subtropical and tropical fish.
- The term "characins" has been used historically, but scientists now prefer the term "characids" to represent the group's status as a largely monophyletic family rank group.
- The order Characiforms contains the Characidae family.
- The bodies of characiforms are virtually always scaled, they have well-developed teeth, a pelvic fin, and typically an adipose fin.
- There are many different types of environments that these fish call home.
- From southwest Texas and Mexico through Central and South America, they are native to the Americas.
- Although many of these fish are found in rivers, some, like the blind cave tetra, actually live in caves.
Learn more about Fossil here:
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Disclaimer: The given question in the portal is incomplete. Here, The complete question.
Question: Characid fishes are found naturally only in South America and Africa. Fossils of these fish are not found on any other continents. What is the most likely explanation of this distribution pattern?
A) Characid fishes arose prior to the separation of the African and South American continents
B) Characid fishes arose in the South Atlantic Ocean and migrated to Africa and South America
C) These fishes arose in either Africa or South America and migrated across the South Atlantic Ocean to another continent
D) Convergent evolution is responsible for the distribution of characin fishes
