Question

quiz
1\twhat caused the creation of mitochondria?
\t(a)\tone cell took over another cell
\t(b)\tlife forms became more complicated
\t(c)\tcells needed more energy
\t(d)\tdna was shared between cells
2\twhich section of the article highlights the idea that mitochondria are what allowed for more complicated life to develop?
\t(a)\tintroduction paragraph 1
\t(b)\t\where did mitochondria come from?\
\t(c)\t\what do the mitochondria do?\
\t(d)\t\what happens when something goes wrong?\
3\tread the following statement.
\t\tmitochondria can be the source of genetic problems in people.
\twhich sentence from the article provides the best support for the above statement?
\t(a)\tchanges in the mitochondrial genome can be passed down from mother to child and can cause devastating problems.
\t(b)\tthese diseases can appear at any age.
\t(c)\tthey result in a wide range of symptoms including hearing loss, blindness, muscle wasting, seizures and organ failure.
\t(d)\tin the meantime, scientists are looking for ways to treat them and make sure they are not passed down to new generations of people.
4\twhat do mitochondria do for organisms?
\t(a)\tcreate cells
\t(b)\tmake dna
\t(c)\tmake people sick
\t(d)\tcreate energy

Explanation:

Question 1

The endosymbiotic theory explains that mitochondria were created when one cell (a prokaryote) was engulfed by another cell (a eukaryote - like ancestor), so option A aligns with this theory. Option B is a result of mitochondria, not the cause of their creation. Option C is about the need for energy (a function of mitochondria) but not the cause of their creation. Option D is not related to the origin of mitochondria.

To determine which section highlights mitochondria's role in complex life development, we analyze each option. The "What Do The Mitochondria Do?" section would explain their function, including how their energy - producing role allowed for more complex life. The Introduction (A) is likely an overview. "Where Did Mitochondria Come From?" (B) is about origin, not function in complex life. "What Happens When Something Goes Wrong?" (D) is about problems, not complex life development.

The statement is about mitochondria being a source of genetic problems. Option A says that changes in the mitochondrial genome can be passed down and cause devastating problems, which directly supports the idea that mitochondria are a source of genetic problems. Option B is about the age of disease onset, not the source of genetic problems. Option C is about symptoms, not the source. Option D is about treatment, not the source.

Answer:

A. one cell took over another cell

Question 2