Biology, 28.12.2020 04:40 alayciaruffin076

Which environmental factor could lead to a decrease in genetic variation in a population of tuna? an increase in food availability
an increase in pollution
a decrease in tuna fishing
a decrease in tuna predators

Answers: 1

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Answer from: Abrahamolve

The environmental factor that leads to a decrease in genetic variation in a population of tuna is :

B) An increase in pollution

The link between genetic variation and environmental pollution, the latter being a factor that adversely affects the variation of a particular population. The concept of environmental stress not only means low reproductive rates, but is also a factor that impedes genetic exchange with other populations and reduces the genetic diversity of the population. For this reasons, increased contamination means a decrease in the genetic diversity of the tuna population.

Thus, the correct answer is B.

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Answer from: christeinberg1

The environmental factor that could lead to a decrease in genetic variation in a tuna population is an increase in pollution (second option).

Explanation:

There is a correlation between genetic variability and environmental pollution, the latter being a factor that impacts negatively on the variability of a specific population.

The concept of pollution stress not only implies a low rate of reproduction, but it is also a factor that prevents genetic exchange with other populations, which is a factor that makes the genetic variability decrease in a population.

For these reasons an increase in pollution implies a decrease in genetic variability in a tuna population.

Other options, such as an increase in food availability, a decrease in tuna fishing or a decrease in tuna predators, are environmental factors that contribute to increased genetic variability.

Answer from: Quest

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?

Answer from: Quest

Atp is is our little "pocket" of energy. of course, if you have too little, then it means you have too little energy, and you'll pass out. the way to not have enough, is to have no energy sources (glucose, fats, proteins). you can't have too many atp molecules. cycles like the krebs cycle produce it, but if you have too much of any substrate (or too little for that matter), the cycle stops and atp is no longer made (it stops until substrate levels are such that the process can go on). in any case, this is unlikely since atp is constantly hydrolyzed and remade, even while you're asleep. you won't have too much. if you have zero, you are dead or dying.