Question 3

03) How much of the skeleton is made of organic components?

2/3

1/4

1/3

all of it

If 21% of our atmosphere is oxygen and 78% of our atmosphere is nitrogen, are we able to attain our nitrogen levels in our body that we need through the air?

Tenho uma dúvida sobre uma coisa, por favor me expliquem para onde vai a água da chuva que cai sobre a areia, já que dificilmente vemos se formarem poças e por que vão pra esse lugar?

Enzymes speed chemical reactions by A. Decreasing amount of energy needed to start a reaction B. Increasing the amount of energy needed to start a reaction C. Adding heat to the reaction D. Removing heat from the reaction

Normal red blood cells can easily travel through blood vessels, whereas sickle-shaped red blood cells get stuck. This is the basis of sickle cell anemia.

What are two possible ways in which mining metals affects the environment

Forest fires take away large dense tree populations. What negative impacts can occur to the carrying capacity and biodiversity because of this?

Fish are thought to have descended from ostracoderms.

When disease-causing organisms, such as bacteria or viruses, invade, the body responds by releasing chemicals to raise the core body temperature, causing a fever.

We live in the troposphere. Could we live in any other layers of the earth?

What does a mineral rock look like