Answer:
It all comes from the sun
Explanation:
this is because without the sun plants wouldn't grow and without plants our meat sources can't eat and therefore nothing else can either.
Explanation:
They both are alike because they both rely on frequencies to determine perception. In hearing, a sounds frequency determines its pitch whereas in TOUCH the frequency of vibrations is used to perceive texture and to sense the environment through hand held tools.
<u>Answer:</u>
Recent evidence suggest that feathers evolved from scales and suggest that 'feathers and pycnofibers' could be homologous.
<u>Explanation:</u>
- One of the major difficult issue related to bird evolution is the evolution of feathers.
- Feathers are considered as the most 'complex integumentary structures' which are found in vertebrates.
- Evolutionary developmental biology suggests that the 'planar scale structure' is been modified for developing into feathers by 'splitting' to form web like structures.
- Scales and Feathers consist of 'two distinct form of keratin' so it was thought that 'each type was exclusive skin structure' but recent study suggests that they are developmental expressions of same skin structures.
That's called evolution. I'm not sure exactly what it's asking, but I hope this helps you
Answer: Option A) carbohydrates and lipids
Explanation:
Myelin is present in the axons of nerve cells. It is composed of a class of lipids called sphingolipids with choline, galactose, glucose present in the chemical composition alongside N-acylsphingosine.
Thus, Myelin is composed of lipids and carbohydrates
