Answer:
Our energy supply comes mainly from fossil fuels, with nuclear power and renewable sources rounding out the mix. These sources originate mostly in our local star, the Sun. Electricity falls into its own category because it's an energy carrier and not a primary source.
Answer:A) The ocean is hypertonic to the erythrocytes.
Explanation:cells shrink when placed in an hypertonic solution.
This shrinkage occurs does to the movement of water out of the cell and through the cell membrane.this phenomenon is called plasmolysis.
The movement of water out of this cell occurs through osmosis.osmosis is the movement of water from a region of high concentration of solute to a region of low concentration of solute, through a semi-permeable membrane.
In this case,sea water has a higher concentration of solute (hypertonic) and the blood cells has a lower concentration(hypotonic) .the cell membrane serves as the semi-permeable membrane and and a result water moves out of the cell
14. A. Pathogens. Includes all types of harmful organisms.
15. A. Immune.
16. C.
17. A.
18. D.
19. A.
20. D.
Answer:
Xylem developed to transport water from the plant’s roots to the rest of the plant.
Explanation:
A waxy cuticle is usually present to reduce water loss, whereas spines are often in place that help plants avoid being eaten by herbivores.
Stomata are key for gas exchange, and actually permit the release of water. Water is taken up through the roots, not the stomata
All plant cells have nuclei, which is the organelle in which DNA is stored. The seeds did not develop to provide a place for the storage of genetic information.
However, the xylem is an important part of the plant vascular transport system that ensures water is transporter from the roots to the leaves. This is an important adaptation for land plants as it ensures all parts of the plant get a water supply, particularly the leaves that are undergoing photosynthesis.
Answer:
C
Explanation:
- The answer can't be A since a solid, liquid and gas can have the same color. For example you can take water. It exists in three phases ice, liquid and water vapour; they are all colorless.
- The arrangement and movements of the particles in the substance however is different in each. Particles in solid are put more closely together and held at fixed positions making them having higher density. Liquid particles are more further apart than solids and are able to move freely. Gas particles are more loose than solids and liquids allowing them to travel more faster. That is why you can smell a perfume even when it was sprayed far away.
