• Chromosomes in the same pair are very
similar in

Chromosomes in the same pair are very  similar in shape, size and genetic material they contain.

Explanation:

Chromosomes of the same pair are called homologous chromosomes, composed of the genetic information provided by each parent for a specific characteristic.

Each homologous chromosome possesses the same genetic information that determines a characteristic or function, however, the only difference is that the alleles can be different, such as one dominant and one recessive. The size and shape of the chromosomes of a pair are similar, allowing them to be grouped in pairs.

its temperature is increasing. this causes molecular vibrations to increase.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.