Answer: homologous structures are inherited from a common ancestor.
Explanation:
According to comparative morphology, homologous structures are inherited from a common ancestor. They also show similar pattern in in their embryological development.
Homologous structures are the similar structures due to shared ancestry. The organism with homologous structures are all the descendants of a common ancestor.
Change nitrogen gas to ammonia.
The parts of the amniotic reptile egg include the amniotic fluid, the albumen, and the shell.
<h3>Parts of an amniotic reptile's egg</h3>
The various parts of amniotic reptile's eggs include:
- The external shell which serves as a protective layer
- The yolk which supplies energy to the embryo
- The albumen supplies the embryo with water and proteins
- The extra-embryonic membranes - the chorion, the allantois, and the amnion.
The chorion serves as a channel for gaseous exchange between the embryo and the environment.
The allantois partially functions as waste manager and in respiration. It stores nitrogenous wastes and gets rid of them as well as participates in gaseous exchange along with the chorion.
The amnion protects the embryo against mechanical shocks. It also protects the developing embryo from being dehydrated.
In other words, the 3 extra-embryonic membranes protect, facilitate gaseous exchange, and ensure that wastes are properly disposed of.
More on amniotic eggs can be found here: brainly.com/question/14791069
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Answer:
Due to change in genetic combination.
Explanation:
The results change as the number of trials increased because variation occur in the genetic combinations of chickens. It is important to breed the chickens repeatedly in this experiment in order to gain accuracy and attain best results. If the chicken is breed repeatedly, at the beginning changes occur in their offspring due to change in their genetic makeup so for accurate results repetition is necessary.
