Question

1) which of the following evidence supports the endosymbiotic theory for the origin of eurkaryotes?
A. Mitochondria and chloroplasts have their own circular DNA.
B. Mitochondria are larger than bacterial cells.
C. Chloroplasts are surrounded by a single membrane.
D. Both the chloroplasts and mitochondria divide by budding.

Answer 1

2) The limit of resolution can best be defined as:
A. Twice the wavelength of light.
B. The minimum distance that two objects must be apart in order to be distinguished as separate objects.
C. The size of the smallest object which can be seen using the microscope.
D. The degree of sharpness of the image produced by the microscope.

Answer 2

A. Mitochondria and chloroplasts have their own circular DNA.


C. The size of the smallest object which can be seen using the microscope.
(Assuming that this is about optical microscopy, the limit is about 200 nm)

Answer 3

Thank you so much! I have one other question. When calculating the actual width of a specimen, I got 0.558333333. How many decimal places should I put as my final answer?

Answer 4

no problem.

what did you use to take the measurement, a ruler?
what was the smallest unit on the ruler?

If you used a common mm ruler, I would say 0.56 cm

Answer 5

you always wanna keep the measurement one decimal place smaller than the smallest unit.

Answer 6

Actually, I didn't measure the specimen. It wasn't a drawing lab either. The light micrograph of a mature buttercup root was shown ( it's length was 67mm--I measured it) on the question paper. I was told to calculate the actual width X to Y which was a line drawn across the micrograph. It kind of looked like this: And all it said was that the micrograph was magnified 120 times. The question was: "What is the actual width of the specimen from X to Y?"

Answer 7

I used the formula:
Size of image/ magnification

Answer 8

But...is this even correct?

Answer 9

So on the x120 magnified picture, you measured 67 mm?

then yeah, just divide and use the number with the smallest amount of sig figs.

Answer 10

yes. Now I'm sure about the answer...Thank you! Also, I have this question I need help with (I'm sorry for bothering you).

I'm not quite sure how to answer this question so I need some advice.

The diagram below represents the relationship between prokaryotic and eurkaryotic cells. Some features are unique to either prokaryotes or eurkaryotes while both types of cell share common features. State 2 features in each of the categories shown:

Answer 11

*3 features...not 2.

Answer 12

No worries. I come on this website to help, it's not a bother.

Now to answer this question you need either know alot about the organisms, through notes from class OR you can literally look up "Eukaryote and Prokaryote comparison" chart or something. That will give you all the facts, but it's not a substitute for actually knowing that each part that is different (or similar) pertains to the rest of biology - which if you keep studying will come up again and again.

So for the assignment just google that, but make sure you read some literature on what the outcome of the differences is.

Answer 13

So, list a feature that the prokaryotic cell has that the eurkaryote cell doesn't and vice versa? Also, for the intersection, I'll have to list a feature that both the eurkaryotic and prokayotic cell have in common? Is that it?

Answer 14

And that amounts to the 3 features.

Answer 15

yes, that's exactly it. It's just a venn diagram.

3 features unique to prokaryotes, 3 unique to eukaryotes and 3 that they share.

Answer 16

Simple! Thanks alot!

Answer 17

no problem !