Answer:
The correct answer is - due to the law of segregation.
Explanation:
In the given case the genotype of Rr and as we know R is a dominant characteristic for round seeds and r represents the recessive allele for wrinkled seeds in a pea plant. So if a plant has Rr in its genotype it means it is a phenotypically round pea plant due to dominance in this heterozygous case.
The law of segregation states that two alleles of a gene of a specific trait will be distributed randomly and there is an equal chance of each allele to end up in the gametes, similarly in this case both alleles can be segregated to gametes and it is a random process.
Large blue whales that are up to 30 meters long live primarily on krill that is/are only about 6 cm long.
Blue whales belong to the class of mammals. They are the largest animals on the Earth. They live in marine habitat. They can be more than 100 feet long. The weight of a single whale can be equal to 30 elephants. And they can live for as long as 80-90 years.
Krill are small animals belonging to the class of crustaceans. They are present in oceans. Krill are actually zooplanktons. They are majorly the food of whales. Krill are filter-feeders.
To know more about blue whales, here
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<span>Metamorphic rocks form by existing rocks join together under high heat and pressure. Examples of metamorphic rocks are marble, schist, slate, and quartzite. Metamorphic rocks formed when the minerals are chemically changed due to heat and pressure. They are often seen near magma but they do not melt like igneous rock.</span>
I think the correct answer would be A. The yolk sac becomes the placenta. It is membranous sac that is attached to the embryo. It provides all the nutrition and the blood cells needed by the embryo. It is also called the umbilical vesicle.
