Answer: Pia mater. The pia mater (Latin: tender mother) is a very delicate membrane. It is the meningeal envelope that firmly adheres to the surface of the brain and spinal cord, following all of the brain's contours
Explanation:
I think it was based off the Earth because at that time they thought Earth was the center of the solar system. This answer is best supported by answers and google
Please mark brainiest if I helped.
Answer:
DNA is one of the major sources might be wrong tho
Explanation:
DNA and the genetic code reflect the shared ancestry of life. DNA comparisons can show how related species are. Biogeography. The global distribution of organisms and the unique features of island species reflect evolution and geological change.
Answer:
<em>The function of the xylem is to transport water.</em>
Explanation:
Xylem can be described as a vascular tissue which transports water from the roots to other parts of the plant. Xylem cells form a long tube-like structure for the water to move. The mixture of water and some nutrients that pass through the xylem is known as a xylem sap.
On the contrary, phloem id the vascular tissue which is involved in the transportation of food from the leaves to other parts of the plant.
Changing environments and competition for survival are the answer so D is the correct answer