<em>E a bigger brain is not a identity a fossil as a hominem species</em>
Answer:
Which of the following statements is true? 3. Adaptive defenses include both humoral and cellular immunity.
Explanation:
Definitely Innate defenses are not enough to keep a person healthly, there are a lot of other factors to take into account when we are considering people's health. Adaptive defenses not only include humoral immunity (mediated by macromolecules) , but also cellular immunity (does not involve antibodies).
Red blood cells have a flattened disk shape. This relates to their function as this shape increases the surface area to volume ratio for better gas exchange.
Homeostasis is maintained by negative feedback loops within the organism. In contrast, positive feedback loops push the organism further out of homeostasis, but may be necessary for life to occur. Homeostasis is controlled by the nervous and endocrine systems in mammals.
Adults resting heart rate is 60-100 beats per minutes. People who are physically fit it is generally lower. Resting heart rate usually rises with age
