The correct answer is D.
From the scientific research conducted so far, we know that in the early Earth's history the atmosphere lacked oxygen and was mostly filled with other gases like methane. The increase in oxygen levels happened when the plants started producing oxygen as a byproduct of the process of photosynthesis.
The research so far also shows that the RNA was present before the DNA and that the microspheres might have been essential to the development of life on Earth.
Answer:
asexual reproduction
Explanation:
Animal Reproduction
In asexual reproduction, an individual can reproduce without involvement with another individual of that species. Sexual reproduction in seahorses: Female seahorses produce eggs for reproduction that are then fertilized by the male.
Answer:
<em>its the last one </em>
Explanation:
cause its the outer layer of the skin
Answer:
A gene transmitted to males from the maternal line and from fathers to daughters.
Explanation:
Gregor Mendel through his research on pea plants, came up with three laws which are:
- <em> The Law of Segregation of genes: Each inherited trait is defined by a pair of gene alleles. Genes are randomly separated to the sex cells so that sex cells contain only one allele of the pair. </em>
- <em>The Law of Dominance: An organism with alternate forms of a gene will express the form that is dominant.
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- <em>The Law of Independent Assortment: Genes for different traits are sorted separately from one another so that the inheritance of one trait is not dependent on the inheritance of another.
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In His work, he established the basic patterns of inheritance and it wasn't until after his death that sex linked inheritance patterns were identified.
He believed that a pair of genes called alleles, were transmitted, each allele from one parent and both alleles transmitted from each parent constituted the complete pair in the offspring.
However, if different variants of the same gene were inherited from both parents, the dominant gene is expressed in the offspring (phenotype).
Since the basis of his work established genes being equally transmitted by both parents to offspring, the variations being due to dominance, genes transmitted from mother to son and from father to daughter, follows the Mendelian pattern of inheritance.
