The answer is C barriers around mating
In an ecosystem, available energy A. Diminishes at each successive tropic level.
<u>Cross the </u><u>green-pod plant</u><u> with a yellow-pod plant. </u>Because the homozygous recessive plant tests for the presence of any recessive alleles in the unknown genotype.
The cross between an unknown genotype plant and a known homozygous recessive plant is referred to as a test cross. Because each offspring of a recessive homozygote will inherit one allele for the recessive trait, the phenotype of the offspring will depend on the second allele.
The genotypes, allele combinations, and observable qualities of children from genetic crosses may be predicted using a Punnett square. Mendel examined the genetics of pea plants and determined how traits like flower color, blossom position, seed color, and seed shape are passed down through the generations.
According to Mendel's theory, parents impart "heritable factors"—what we now refer to as genes to their children, which in turn determines their qualities. A particular gene, such as the Y gene below, which determines seed color, has two copies in every individual. If these copies correspond to various alleles, or versions, of the gene, the dominant allele may conceal the recessive allele. The dominant yellow allele Y conceals the recessive green allele Y in seeds.
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Answer:
A B C. only the mass and the mass equivalent of energy together are conserved.
One, a lot of mass extinctions are based on theories by scientist. Two, they all caused major changes in the Earth's systems (Ex. ecology, atmosphere, surface, and waters). Three, they all have theories on what caused it.
Also this is obvious but in all mass extinctions they wiped out a lot of lifeforms, 90% of anything that has EVER lived on the Earth is extinct.
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