Answer:
The medulla – the deepest layer of the hair shaft, only seen in large and thick hairs.
The cortex – the middle layer of the hair shaft which provides the strength, color and texture of a hair fiber.
The cuticle – the outer layer of the hair shaft is thin and colorless
Explanation:
Select the answer choice that is not one of those three above
Answer: supplies oxygen and nutrients to our bodies by working with the respiratory system. At the same time, the circulatory system helps carry waste and carbon dioxide out of the body
Explanation:
To living organisms, the most dangerous debris from tephra is volcanic ash, because it spreads so widely.
Answer:
D. Tt with Tt
Explanation:
In the given question, the student wants to study the stem length in the plants which are controlled by the T (dominant) and t (recessive) alleles.
To study the monohybrid cross for the stem length, the student must cross the heterozygous forms of the gene for the trait as it will produce the mixture of variables of height.
cross- Tt x Tt
T t
T TT Tt
t Tt tt
1. Genotype TT - tall height
2. Genotype Tt- tall height
3. Genotype tt- small height
Thus, Option-D is correct answer.