A genetic factor exhibiting a trait even in the presence of alternative forms is described as a dominant allele. Dominant alleles express over recessive genes, as exhibited in the height trait of pea plants.
A genetic factor for a trait that is always expressed when present is referred to as a dominant allele. In genetic terms, alleles are variations of a gene. In a pair of alleles, one can be dominant and the other recessive. When an individual possesses both the dominant and the recessive allele, the trait associated with the dominant allele gets expressed. For example, for the gene concerning height in pea plants, the allele for tallness is dominant over the allele for shortness. Thus, when a plant inherits the tall and short alleles together, the tall trait is expressed due to the dominance of the tall allele.
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Answer: Option C
Explanation:
The secretory proteins are found inside the cell which is secreted by the Endoplasmic reticulum and moves from the same route towards the Golgi apparatus.
Although it is secreted from the endoplasmic reticulum of the cell, but if it is injected from the outside to the inside of the cell then it moves to the rough endoplasmic reticulum and follows the secretory pathway of the cell.
Hence, the correct answer is option C
Answer: B. competition
Explanation:
A niche can be define as the functional role which an organism plays in an ecosystem to sustain it's life. For example, the type of food the organism eats, or type of habitat chosen.
Generally, when two species exhibit a same niche, competition for resources develop between the two species.
According to the competitive exclusion principle when two or more species compete for the same resource the one which is superior over the other receives the resources and the population of weaker species decline.
In the given situation competition will develop between the two species of mouse as they exhibit same niche and competitive exclusion principle on two mouse population will apply.
Answer: external fertilization
Explanation:
External fertilization is the process of fertilization in which the male sperm cells fuses with the female egg cells outside the body of the female. This type of fertilization is used by the organisms which live in the water body.
The salmon is a fish species which utilizes external fertilization. In the case of salmon, the female salmon drops the eggs in the bottom of the water which are fertilized by male salmon after secreting their sperms over these eggs.
southern Africa
western Australia
northern South America
The correct answer is - southern Africa.
The coal fields found in the southern part of the African continent and the eastern part of the United States are a direct evidence that supports the theory of the continental drift. The reason for that is that the coal found in both locations is the same one, from the same type of trees, formed in the same period. All of those clues suggest that the continents were once merged together, as for starters, the type of tree that gave the basic material for the coal is the same, and trees that are totally the same is almost impossible to be found in separated continents as they will have some modifications that will distinguish them. The climate and period in which the coal is formed is also exactly the same, which also leads to the conclusion that there was once a large connected land mass.
Answer:
africa
Explanation:
The given blank can be filled with two electrons.
The K, L, M, N are the four shells in an atom. The K shell is the initial that is present nearest to the nucleus of the atom, and it comprises two electrons. The L shell can withstand eight electrons, M shell can withstand eighteen electrons, and however, the atom attains stability if the last (valence) shell comprises eight electrons.