Which type of cell starts to develop about 17 days after fertilization? a. heart b. eye c. kidney d. liver

The correct answer is option A. "Heart".

Explanation:

It is well documented that just about 17 days after conception, the human heart starts to beat. This happens because heart cells starts to develop about 17 days after fertilization. Particularly, the cells called cardiomyocytes, which trigger the cardiac muscles contraction needed to start the heartbeat. Actually, the heart is the first organ to form during embryogenesis.

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above

osteogenesis imperfecta (oi) refers to a congenital ailment of bones. in the condition, the bones become brittle or fragile. this ailment is a general result of the defect or mutations in the genes (colia1 or colia2). this mutation results in imperfect collagen formation either in quantity or quality wise.  

there are eight kinds of oi defects, and each kind varies with certain distinctions in symptoms. the usual symptoms include frequent bone fractures, loss of hearing in infants, protruding eyes, discoloration of the white in the eyes, respiratory issues, loosening of the joints, short stature, and other symptoms.