Answer:
D.Mendel's law of independent assortment is being violated.
Explanation:
According to Mendel in his law of independent assortment, the allele of one gene gets sorted into gametes independently of the allele of another gene. He discovered this when he performed a cross involving two characters i.e. dihybrid cross, which he obtained a F2 phenotypic ratio of 9:3:3:1. This ratio is only possible if each allele of each gene is represented in each gamete i.e. a dominant allele of the first gene is equally likely possible to be contained with a dominant or recessive allele in the second gene.
If this occurs according to the Mendel's law of independent assortment, a total of four possible combinations of gametes should be produced by each parent organism. When this 4 gametes are crossed in a punnet square, a total of 16 offsprings will be possible.
However, in this case, a total of 12 offsprings were produced, depicting that the alleles did not separate independently of one another to produce four possible gametes.
Complete question:
Members of the tropical tree genus Ceiba currently grow in the rainforests of the Amazon. A paleontologist discovers several fossils that she attributes to this genus in the Pampas region of Argentina. This region is not currently covered with tropical rainforests. She concludes based on these fossils that this region of Argentina was covered with tropical rainforests in the past. This form of reasoning is known as:
A.
Deduction.
B.
Induction.
C.
Abduction.
D.
A random guess.
Answer:
This form of reasoning is known as Deduction (Option A)
Explanation:
Induction: Might be defined as a process of initiation in something, such as a religion, a new job, a new activity, a new curse, etc.
Abduction: Refers to the illegal act of taking someone somewhere by obligation or by force, against the person´s will. Also refers to the body´s extremities movement.
A random guess: Refers to a random conjecture about something, with no basis or fundaments.
Deduction: The fact of answering a question or reaching a conclusion based on evidence or fundaments. Usually after a process of investigation or study, and knowing the facts.
The exposed situation is an example of a deduction made by the researcher. She bases her conclusion on the fact that Pampa´s fossils might be of the same genus as Amazonia´s trees, which means that in Argentina the environmental and climatic conditions were comparable to those in current Amazonia. Also, as a paleontologist, she must know about the biogeographic processes that modeled the earth and living beings. Her conclusions are not random. She has bases and fundaments to conclude that Argentina was once covered with tropical rainforests in the past.
Answer:
Air temperature: Ice, tree rings
Ocean temperature: Chemical isotopes in foraminifera
Carbon dioxide levels: Ice
Kinds of plants: Fossilized pollen grains
Rainfall: Tree rings
Explanation:
These are the correct answers.
Numerous barriers can prevent sperm from reaching and fertilizing the egg, this can be that the Sperm may be defected, or lack the required number of mitochondria needed to help move the sperm. Also, if sperm had already fertilized the egg, there is a change that takes place to the membrane surrounding the egg preventing further sperm from fertilizing.
Do you mean "why"?
They are the main source for all living organisms because they provide energy, relatively short term, for any creature that consumes them.
