Because, substances can pass through it while others can not but Oxygen, good molecules,
and waste products can only go through it.
Answer:
Sexual reproduction is a process where two organisms create an offspring. It requires two parents, a sperm and an egg. Inherited traits can increase an organism's survival by having good traits such as survival skills like eating, walking etc.. It can decrease because some inherited traits might be diseases.
Explanation:
The correct answer is silent mutation .
There are sequences present in the body where a point mutation occurs but the protein formed is still the same
Answer:
Natural selection doesn't favor traits that are somehow inherently superior. Instead, it favors traits that are beneficial (that is, help an organism survive and reproduce more effectively than its peers) in a specific environment. Traits that are helpful in one environment might actually be harmful in another.
Explanation:
there ya go mate ^^
II -rib cage
The first one looks like the esophagus
3rd one- lungs
4th one diaphragm
