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rodikova [14]
3 years ago
8

On a phylogenetic tree, what do the branch lengths represent?

Biology
1 answer:
elena-s [515]3 years ago
7 0

Answer:

the evolutionary time between two nodes

Explanation:

Branch lengths indicate genetic change i.e. the longer the branch, the more genetic change (or divergence) has occurred

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Which domain is unique because all of the members have cells that contain nucleus?
Anna71 [15]


eukarya because eukaryotes have a nucleus, hope this helps ^.^


6 0
3 years ago
Using data from the table above, select the best explanation for why that cell will be able to eliminate waste most efficiently?
fomenos
The correct option is this: CELL 2 WILL THE ONE THAT WILL BE ABLE TO ELIMINATE WASTES MOST EFFICIENTLY. This is because it has the highest surface area to volume ratio which facilitates the exchange of materials between a cell and its environment.
The rate of diffusion of materials into and out of the cell depends on the surface area to volume ratio of the cell. The higher this ratio, the higher the rate of diffusion.
6 0
3 years ago
Name the three main parts of a human cell?
zysi [14]

Answer:

Explanation:

In this lesson we will learn the three basic parts of all cells. Cells have something called a cell membrane, a nucleus, and cytoplasm.

7 0
2 years ago
Apoptosis involves all but which of the following?
LenaWriter [7]

Answer:

Apoptosis does not involve:

c. lysis of the cell

Explanation:

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The main morphological and biochemical changes seen during the apoptosis are the fragmentation of DNA by endonucleases, nuclear, chromatin and cytoplasmatic condensation, apoptotic bodies formation (membrane bound-vesicles form of cell parts) and the phagocytosis (digestion) of those bodies by the scavenger cells.

Apoptosis is regulated by cell- signaling pathways, the caspases, a family of cysteine proteases, are the ones involved in the process.

In the process there is no lysis of the cell as this could lead to a inflammatory response (just happens in necrosis) which would affect contiguous cells, and will involve immune cells. In apoptosis there is just a membrane blebbing, but it does not loss its integrity.

4 0
3 years ago
What type of symbiotic relationship do flowers and bees have and how are they affected?
Masja [62]
It's called a mutualistic relationship! :) 
I hope this helps!:)
4 0
3 years ago
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