Human activities is my answer
1. B A reduction in competition.
2. C. Respiratory system
Answer:
The pic on the right is a solar eclipse and the one on the left is a lunar eclipse. Lunar eclipse only happens when the sun and moon are directly aligned in front of the sun. A lunar eclipse occurs when the Moon moves into the Earth's shadow. This can occur only when the Sun, Earth, and Moon are exactly or very closely aligned with Earth between the other two, and only on the night of a full moon.
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Breathing(CO2) of plants for making food that is eaten by animals.and expelling the carbon from animal's body by breathing or defecation
Even though neither parents express the recessive trait, the parents could be carriers of the trait by being heterozygous for that trait. For example, having an Aa genotype. If both parents are heterozygous and possess one recessive allele, there is a 25% chance that their offspring will inherit a recessive allele from each parent and have an aa genotype. Hence in order for this situation to occur, both parents need to be heterozygous for the trait, ie have an Aa genotype.
