Match the stages of development with the appropriate week of pregnancy.

Fetus begins movements called quickening.
At this point, the chance of a miscarriage decreases.
The pregnancy is considered “at term” at this point.
At this point, eyelids and ears are forming.
At this point, lungs begin to produce surfactant.

20 weeks - Fetus begins movements called quickening

12 weeks - At this point the chance of a miscarriage decreases

38 weeks - The pregnancy is considered at term at this point

8 weeks - At this point eyelids and ears are forming

24 weeks - At this point, lungs begin to produce surfactant

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation:

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation: