The answer would be (2) a common ancestor
Answer:
Explanation: Eagles are endotherm and homoeothermic.
Coyote are endotherms and homoeothermic.
Walrus are Endothermic and homoeothermic.
The above organisms maintain constant internal body temperature irrespective of fluctuations in surrounding temperature.
Artic shrimp are ectotherms; and homoeothermic. Despite the fact that it has negligible source of intenal heat, its environmental temperature is relatively stable, therefore it is both ectotherms and homoeothermic.
Butterfly, freshwater catfish, Salamander are Poikilothermic. These organism’s body temperature fluctuates with the immediate surrounding temperature. They lack internal body temperature.
Answer:
E. This population is in Hardy-Weinberg equilibrium.
Explanation:
A population in Hardy-Weinberg equilibrium maintains constant allele and genotype frequencies over generations. To obtain the Hardy-Weinberg equilibrium, none of the evolutionary forces (genetic drift, mutation, natural selection, etc.) should be operative on the gene pool as they deviate the population from the equilibrium.
According to the given information, the allele frequencies and hence the genotype frequencies in a population of butterflies are constant over two decades. This shows that the population is at Hardy-Weinberg equilibrium and is not evolving.
Answer:
Mutation, fertilization, meiosis are different mechanisms by which changes can occur in the genome.
Explanation:
There are several process which is responsible for causing change in the genome of the species which results in the evolution of that species. Some of these processes are:
1. Mutation: In mutation, some nucleotide sequences get change and this change can occur due to frameshift, addition, deletion or any other process. This change in nucleotide can be seen in phenotype and helps in the evolution of the species.
2. Fertilization: During fertilization mixing of the genome of two individual takes place which results in producing a genetically distinct offspring which contains variation. So as the offspring is genetically different it can contain new alleles that can help the individual to survive in the changing environment.
Answer:
A central line-associated bloodstream infection (CLABSI) is a serious infection that occurs when germs (usually bacteria or viruses) enter the bloodstream through the central line.
Explanation:
