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:
In taxonomy, binomial nomenclature ("two-term naming system"), also called binominal nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, although they can be based on words from other languages. Such a name is called a binomial name (which may be shortened to just "binomial"), a binomen, binominal name or a scientific name; more informally it is also called a Latin name.
The top layer, i believe.
Hi there!
I see that you are new, so let me be the first to say WELCOME TO BRAINLY!
I hope you enjoy it!
ANSWER:
the fundamental and distinctive characteristics or qualities of someone or something, especially when regarded as unchangeable <--- so that is the dictionary definition
DNA stands for deoxyribonucleic acid,
Hope this helps!
~CoCo
Answer:
Gills are an immediate tip for you to know that this animal lives in an aquatic biome, where it will be using its gills to breathe underwater without the need to surface for air. Usually, the animals with gills are fish, because they filter out oxygen from the wanter they inhale.
Explanation:
