Answer:
<h2>E. normal roosters & hens and bald roosters & hens.</h2>
Explanation:
The sex chromosomes of the chickens are represented by ZZ for male chicken that is rooster and ZW for the female chicken that is hen.
In the given question, the genotype of the bald rooster is zz and the genotype of the normal hen is ZW.
So the F1 progeny are, Zz that is normal male and the zW that is bald female.
So F1 × F1
Zz × zW
Thus, F2 progeny are Zz ( normal rooster), zz ( bald rooster), ZW ( normal hen), zW ( bald hen).
The correct answer is Carbonization.
There are many types by which the formation of fossils can takes place. Out of this one is carbonization in which a fossil is formed by the compression of dead organisms over time.1
The correct answer would be Biomass. Biomass is the term for the total amount of living matter in each trophic level of an ecological pyramid. In other words, biomass is considered as the total mass of an organism in a given area.
Answer: The part of DNA that the teacher was modelling would be the backbone of DNA.
Explanation:
The DNA is made of double helical structure which is twisted. In the structure of DNA two strands are coiled among each other.
The DNA consists of the nitrogenous bases, phosphate groups and deoxy-ribose sugar.
The backbone of DNA is made up of sugar( alternating )and phosphate group.The nitrogenous bases such as adenine, cytosine ,guanine and thymine are joined to the deoxy-ribose sugar.
This backbone part was part that the teacher was making as a model by using two coiled springs.
The membrane is composed of phospholipid bilayer arranged back to back.
The plasma membrains selectively with cholesterol molecules and proteins
