Answer:
Any form of precipitation like rain, snow, fog, hail, and even dust that has acidic components. When the acidity of a lake increases, the water becomes clearer and the all the animals decrease.
Explanation:
<span>The gene sequence containing an operator, promoter and repressor is known as an operon. These genes are called as structural genes. the operon is regulated by the presence/absence of the inducer such as glucose/lactose. It may also be a constitutive operon, which works all the time.</span>
The mouse, because it is an endotherm and therefore its basal metabolic rate is higher than the ectotherm lizard's standard metabolic rate.
<h3>What are endotherms and ectotherms?</h3>
Animals classified as ectotherms and endotherms employ several techniques to control body temperature.
Endotherms are recognized as warm-blooded creatures, whereas ectotherms are also referred to as cold-blooded creatures. Ectotherms and endotherms vary primarily in that endotherms control their body temperatures by sustaining bodily functions, but ectotherms depend on external sources like sunlight to do so. Ectotherms include invertebrates, fish, amphibians, and reptiles while endotherms include mammals and birds.
Learn more about endotherm and ectotherm animals here:
brainly.com/question/2500845
#SPJ4
The answer is A! Speciation is the right answer
