Its bases can be joined together in any order like the letters of the alphabet can be strung to form different words.
Sexual reproduction:
Advantages: A species can evolve or adapt to changing environments, genetic diversity
Disadvantages: Time and energy needed to find a mate, requires both male and female gametes, one individual cannot reproduce
Asexual reproduction:
Advantages: Only one individual is needed to reproduce, doesn’t require time or energy to find a mate, can reproduce rapidly in good conditions
Disadvantages: No genetic variation, all of the offspring have the same weaknesses, can’t adapt or evolve
Answer:
A
Explanation:
They form in mountains and flow through mountain river valleys. Glaciers cause erosion by plucking and abrasion.
Answer: B - Were your parents or grandparents ever diagnosed with Huntington's disease?
Explanation: In autosomal dominant disorder, affected offsprings must have an affected parent. Unaffected parents do not transmit the disease.
Since the disease is caused by a dominant allele, the young man would only be at risk of having Huntington's disease if his parents or grandparents had ever been diagnosed with the disease. He needs not to worry if his parents or grandparents had never been diagnosed with the disease.
His cousin who has been diagnosed with the disease could have inherited the allele from his other parent.
The cell membrane is made of a protein layer that is sandwiched between 2 phospolipid layers. It has pores that allow selective passage of substances in and out of the cell.
