The only option given above that is true for natural selection to occur is option d: 'there must be competition for resources'. Natural selection would also occur under predatory pressure. Natural selection occurs through individuals with advantageous characteristics (phenotypes) surviving and passing on their genes (genotypes) to their offspring.
Explanation:
What happens during daytime is, oxygen that gets trapped between filaments of algae, moves them to the surface and during night as O2 is not produced, they slowly sink to lower depths, and you don't see them
The two most important environmental factors are biotic and abiotic factors affecting animals.
<h3>what are the difference between abiotic and biotic factor ?</h3>
Biotic factors are living beings of an ecosystem where as abiotic factors are non-living like physical and chemical agents in the ecosystem.
Biotic factor dependent on abiotic factor, but abiotic factor are independent.
Biotic factor affects the biome, individual species, population biosphere,, where as abiotic factor affects species, their population, community, ecosystem, and biosphere.
Biotic factor are plants, animals, bacteria, algae where as abiotic factors are soil, topography, climate of an ecosystem.
Biotic factor is subjective but abiotic factor is objective.
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B.
The radiation present is likely to cause genetic mutations.
