Answer:
We obtain carbon through cellular respiration and return by excretion through the nose
Answer:
The trick is the swim bladder, which is basically like an air-inflated balloon that can expand and contract depending on how much gas is inside. When the swim bladder expands it will increase in volume and therefore displace more water. This increases the fish's buoyancy and it will float upward.
Explanation:
The amount of chromosomes are fairly constant
Answer:
A is a Comet, B is an asteroid
Explanation:
From its long hazy tail, it appears that the object in figure A is a comet. Comets are a mixture of ice, frozen carbon dioxide, rock, and dust. The bodies shown in figure B appear to be asteroids, which are chunks of rock.
When was BSE first discovered?
BSE first appeared in British cattle in the mid-1980s. There have been numerous cases detected in other countries. A complete list of countries is available from both the U.S. Food and Drug Administration (FDA) and the U.S. Department of Agriculture (USDA).
