Answer: Option D
Explanation:
The blood from the mother carrying oxygen, and essential nutrients is carried to the fetus.There is no different system available in the developing fetus which aids in its growth and development.
The region representing A provides oxygen and nutrients to the fetus and removes carbon dioxide from fetus.
This can be defined as an intersection between the fetus and mother so that there can be exchange of materials.
<span>A polygenic trait is contributed by two or more genes one gene two alleles multiple alleles. True!</span>
Answer:
Explanation:
It is estimated that the Precambrian Era lasted between 3.9 and 4 billion years. Many scientists believe that this era accounts for 90 percent of the world's history.
For the first question, I would say a line graph. And the one about the human heart, I need some more information.
Answer:
Photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds, Three main ingredients are required for photosynthesis: water, carbon dioxide, and light. Plants use light energy from the sun to convert six water molecules (6 H2O) and six carbon dioxide molecules (6 CO2) into a molecule of glucose and six molecules of oxygen, Carbohydrates(glucose) and Oxygen is the end product.
