Answer:
a. heart development.
Explanation:
As the third week of fetal development starts, the process of formation of blood vessels begins. Also, the splanchnic mesoderm in the head end of the embryo forms heart on days 18 and 19. Since it develops heart, this part of the mesodermal cells is called the cardiogenic area. The underlying endoderm sends the induction signals to these mesodermal cells to form a pair of endocardial tubes that gradually develop into a single primitive heart tube.
This primitive heart begins to beat by the end of the third week of development. Therefore, any drug that affects fetal development during the first 20 days of the pregnancy might affect the development of the heart.
Answer:
Patau syndrome is the result of unique distribution of chromosomal pair of three in place of two.
Explanation:
A chromosomal disorder resulting in physical and intellectual disabilities of a child is widely known as Trisomy 13 or Patau syndrome. The symptoms include- defect in heart, abnor-mality in brain and spine, poor development of eyes, unusual number of fingers, a cleft lip or cleft palate and hypotonic or weakness in muscle.
The extra pair of chromosome, the pair of three, either in every cell or in few cells of the body is the main cause of this disease. However, it can also occur if the chromosomes are translocated.
Answer:
A tapeworm can reproduce sexually, either through self-fertilization or cross-fertilization with another tapeworm, or asexually, by breaking off proglottid segments at the end of the trunk. ... Proglottids and fertilized eggs exit the host's digestive tract along with the host's excrement.
Explanation:
Answer:
about 14.7 pounds per square inch
Answer:
plants
Explanation:
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms' activities.