There are all sorts of ways to reconstruct the history of life on Earth. Pinning down when specific events occurred is often tricky, though. For this, biologists depend mainly on dating the rocks in which fossils are found, and by looking at the “molecular clocks” in the DNA of living organisms.
There are problems with each of these methods. The fossil record is like a movie with most of the frames cut out. Because it is so incomplete, it can be difficult to establish exactly when particular evolutionary changes happened.
Modern genetics allows scientists to measure how different species are from each other at a molecular level, and thus to estimate how much time has passed since a single lineage split into different species. Confounding factors rack up for species that are very distantly related, making the earlier dates more uncertain.
These difficulties mean that the dates in the timeline should be taken as approximate. As a general rule, they become more uncertain the further back along the geological timescale we look. Dates that are very uncertain are marked with a question mark.
Answer:
reactants are taken in from the environment by the plant,and products are formed inside the plant.
Explanation:
On the off chance that rodent nourishes upon grasshopper as in betray grasshoppers are the main source accessible. on the off chance that there is bug spray weight in the field on grasshopper and they are alive that implies they have been uncovered at the sub-deadly level then is devoured by rats which open up in light of the fact that it takes a few grasshoppers every day comparatively the peddle is tainted being top customer it stores more than its supplicate
The statement which is true about the inheritance of hemophilia is that it is a recessive trait on the X chromosome. Thus, the correct option for this question is C.
<h3>What is Hemophilia?</h3>
Hemophilia may be defined as an inherited bleeding disorder in which the blood does not clot properly. This can lead to spontaneous bleeding as well as bleeding following injuries or surgery.
Hemophilia is significantly caused by the lack of clotting factor VIII or IX in the blood. In most cases, hemophilia is passed down through families (inherited). Most of the time, it is passed to male children. Several women in the family were carriers of the allele for the disorder, only men ended up actually expressing the disorder.
Therefore, the statement which is true about the inheritance of hemophilia is that it is a recessive trait on the X chromosome. Thus, the correct option for this question is C.
To learn more about Hemophilia, refer to the link:
brainly.com/question/14203344
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