Answer:
C. Traits present in the last common ancestor of a certain group of species under consideration.
Explanation:
Ancestral character traits are the one that is present in the last common ancestor and all of its descendant groups. For example, the presence of the vertebral column is an ancestral trait for all the vertebrate groups such as birds and mammals as it was present in their last common ancestor and is also shared by them.
Answer:
a. 10 species per day
Explanation:
The current rates of extinction are incredibly high, much higher than what is the natural average of extinction of the species. Even though it stands that around 10 species are getting extinct every day, there's many clues that suggest that the number reaches incredible 150-200 species per day. This just backs up the statements of numerous scientists that we are actually creating the sixth mass extinction that Earth has experienced, as such rates of loss of species are typical only for mass extinctions.
<span>The nurse determines this patient is displaying Circulatory hypoxia.Sickle cell anemia can lead to circulatory hypoxia as the cells sickle in the blood vessels and block them. It also produces an anemic hypoxia as the sickled blood cells are removed from circulation.</span>
When two indistinguishable crickets are together, for example, and you only know they are different because of their mating song. A behavioral isolational cricket would conduct only that with another cricket with similar mateship behavior.
BTW you should probably put in the options.
Answer:
In moon rock sample the ratio of the number of stable argon-40 atoms present to the number of radioactive potassium−40 atoms is 7:1. Assume that all the argon atoms were produced by the decay of potassium atoms, with a half-life of 2.5×10^9yr. The age of the rock is
Explanation:
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