Answer: In all living systems we can always find 4 basic elements: carbon, oxygen, nitrogen and hydrogen. Carbon is the basic building unit contained in living matter. The percentage of carbon in the mass of living matter is 19.4 %. Oxygen and hydrogen are present in almost all organic compounds which create living organisms.
Explanation:
The sandwich has 367 calories.
Explanation:
- Carbohydrates and proteins provide 4 calories each per gram while fat provides 9 calories per gram. To calculate the total calories, multiply the respective grams with their calorie count.
⇒ 42 × 4 + 7 × 9 + 34 × 4 = 168 + 63 + 136 = 367 calories
Invertebrate, b/c it doesn't have a spine of any kind
