There are small individual fibres in the muscles, known as musclular fibres or muscle fibers that iat the same time are formed by myofibrils.
The most common and accepted theory of how muscles contract is the sliding filament theory:
The theory says that neurons send signals to the muscle fibres, and, inside these, actin and myosin bind with each-other, contracting themselves using ATP as an energy source. That is a simple way of describing how muscle contraction occurs.
The image down below may help you understand the sliding filament concept a bit better.
Hope it helped,
Happy homework/ study/ exam!
Answer:
the Ohio River Valley
Explanation:
Both nations desired the Ohio Country, and a British expedition led by George Washington clashed with a French force there in 1753. Shortly afterward, the French and Indian War erupted, initially confined to North America but eventually becoming part of the larger Seven Years' War, in which Britain and France formed opposing coalitions.
I think the answer is C but idk for sure.
Answer:Because they keep on repeating.
Explanation:
The answers would be:
Genotype Phenotype
Tt Tall stemmed
tt Short stemmed
Genotypic ratio : 2:2 or 1:1
Phenotypic ratio: 2:2 or 1:1
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<u>You can read on to see how this was done:</u>
Tall stems (T) are dominant to short stems (t).
First figure out the genotypes of the parents. We have a short-stemmed plant and a heterozygous long-stemmed plant cross.
For short stem to occur, you need 2 pairs of short alleles. So the first parent would have a genotype of tt.
Heterozygous long-stemmed means that the parent has one of each allele. So the genotype of the second parent would be, Tt.
Now we can make our Punnett Square.
tt x Tt
<u> t t </u>
<u>T | Tt | Tt</u>
<u>t | tt | tt</u>
Let's list down the genotypes and phenotypic results.
Genotype no. Phenotype
Tt 2 Tall stemmed
tt 2 Short stemmed
So from that we can answer the other questions:
Genotypic ratio : 2:2 or 1:1
Phenotypic ratio: 2:2 or 1:1
