artificial selection
Explanation: if a cow was sken
Answer:
The main ingredient of cells is water. Water is needed to maintain homeostasis. Cells are also made up of macromolecules—nucleic acids, lipids, proteins, carbohydrates. These macromolecules help maintain a cell's structure, help cells communicate with each other, aid in energy storage, etc.
Answer:
Producers are at the bottom of every food chain.
Explanation:
Without producers, the primary and secondary consumers will be affected, as the primary consumer only feeds on producers such as leaves and grass. The producers gain energy from the sun to make food through the process of photosynthesis, and the sun is a infinite resource, thus ensuring that the primary consumers will have enough food to feed and reproduce.
