Answer: God's word
Explanation: Hope this helps :)
Answer:
The correct option is <u><em>A. they evolved from land mammals.</em></u>
Explanation:
The process of evolution explains how closely one organism is to another based on their common ancestors. Scientists believe that those organisms which show many similarities in their structures or functions might have evolved from a common ancestor in the past.
As in the above-mentioned question, scientists have observed that cetaceans lack gills and breath air, this is a property of land mammals. The cetaceans have fin bones which are similar to the limb bones. As limb bones are present in land mammals, hence they cetaceans and land mammals might have common ancestors in the past.
Plants need water
and the second option is true
A solution to be isotonic refers to b) The concentration of solute in the environment and the concentration inside the cell are at equilibrium.
- Isotonic solution is the solution that have equal concentration of solute on both sides of the solution separated by a membrane.
- If a cell is kept in an isotonic solution that means the concentration of the solute inside the cell is the same as that of the outside then the movement of solvent does not occur between the cell and the external environment.
- The osmotic pressure inside the cell and outside the cell across the semipermeable membrane of the cell becomes the same due to equal concentration of the solute on each side.
0.9% normal saline is an example of isotonic solution.
Learn more about isotonic solution:
brainly.com/question/17211905