Answer: I believe you need to examine the layers, the color, texture.
Answer:
i think its D
Explanation:
if thats wrong then im sorry lol
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.
Cellular respiration and photosynthesis are essentially opposite processes. Photosynthesis is the process by which organisms make high-energy compounds -- the sugar glucose in particular -- through the chemical "reduction" of carbon dioxide (CO2). Cellular respiration, on the other hand, involves the breakdown of glucose and other compounds through chemical "oxidation." Photosynthesis consumes CO2 and produces oxygen. Cellular respiration consumes oxygen and produces CO2.
Clostridium botulinum is an anaerobic, spore-forming, bacterium organism that releases a toxin that causes muscle relaxation. The toxin that is released is a neurotoxic protein: Botulinum toxin (BTX) and <span>is produced only in an anaerobic environment. </span>This toxin is used as a a medicine to treat overactive muscle movement.
