Antibiotics are usually derived from bacteria.
Answer: A. scalp hairs grow constantly throughout life.
Explanation:
Hair is a squamous keratinized epithelium which is consist of multi-layered flat cells. Hair are made up of protein called "keratin".
The statement "scalp hairs grow constantly throughout life" is false because at a particular age or due to several factors scalp hairs stop growing.
Scalp hair growth rate depends on three main factors including sex (female hair grows faster than male), age (hair growth slows with age), and ethnicity (Asian hair grows slower than Caucasian hair).
Scalp hair growth stops because of follicle devitalization when the hair length become two or three feet.
Hence, the correct answer is A. "scalp hairs grow constantly throughout life".
When Tom struck Beth’s jump shot 25m into the stands with a force of 100N, the work done by him is 2500J.
<h3>What do you mean by Work done?</h3>
Work done may be defined as the process of transferring energy from one source to the other. It is the outcome of force and displacement.
From the above definition, W = F×d
W = 100N × 25m ⇒ 2500N/m
∴ Workdone, W = 2500J.
To learn more about Work done, refer to the link:
brainly.com/question/25573309
#SPJ1
Answer:
"The Skeletal system has three very important jobs: Support, protection, and movement. Just think, if we did not have a skeletal system for support we would be just like a blob of Jell-O. The bones also protect many organs, and also the brain."
Explanation:
