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OleMash [197]
3 years ago
5

How do rates of mutation "power" molecular clocks?

Biology
1 answer:
Keith_Richards [23]3 years ago
6 0

<span>Molecular clocks use rates of mutation to measure evolutionary time. Mutations add up at a fairly constant rate in the DNA of species that evolved from a common ancestor. The more mutations that happened in each lineage, the greater is the differences between these lineages.</span>

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Which component of the circulatory system is at the tissue level?
Nadya [2.5K]

Blood is considered to be a tissue and it is part of the circulatory system.


The human circulatory system functions to transport blood and oxygen from the lungs to the various tissues of the body. The heart pumps the blood throughout the body. The lymphatic system is an extension of the human circulatory system that includes cell-mediated and antibody-mediated immune systems.



4 0
3 years ago
How many planet in evil eye galaxy
prohojiy [21]
 Hope this helps! 

A collision of two galaxies has left a merged star system with an unusual appearance as well as bizarre internal motions. Messier 64 (M64) has a spectacular dark band of absorbing dust in front of the galaxy's bright nucleus, giving rise to its nicknames of the "Black Eye" or "Evil Eye" galaxy.

Fine details of the dark band are revealed in this image of the central portion of M64 obtained with the Hubble Space Telescope. M64 is well known among amateur astronomers because of its appearance in small telescopes. It was first cataloged in the 18th century by the French astronomer Messier. Located in the northern constellation Coma Berenices, M64 resides roughly 17 million light-years from Earth.

Image Credit: NASA and The Hubble Heritage Team (AURA/STScI); Acknowledgment: S. Smartt (Institute of Astronomy) and D. Richstone (U. Michigan)
 Last Updated: Feb. 16, 2016Editor: NASA Administrator
8 0
3 years ago
Read 2 more answers
6. (3 pts) After transformation, 40 colonies were present on the plate. What is the transformation efficiency of the competent c
natali 33 [55]

Answer:

Given:

Number of colonies on plate = 40

Amount of DNA used for transformation = 100ng

Volume of competent cells used = 100ul

Total volume = 1ml (1000ul)

Volume plated for growth = 200ul

The amount of cells transformed per 1 µg of DNA is called the transformation efficiency

(CFU is colony forming units) => (number of colonies on plate/ng of DNA plated) X 1000 ng/µg = CFU/µg of DNA

Amount of DNA used for plating = 100ng * (200/1000)

                                                      = 100ng * (1/5)

                                                      = 100/5 = 20ng

Efficiency calculation = 40 colonies / 20ng = 2 colonies/ng

               (2 colonies/ng) * (1000 ng/µg) = 2000 CFU/ug DNA

Transformation efficiency = 2000 Transformants / ug DNA

                                          = 2 x 10³ Transformants / ug DNA

Explanation:

Efficiency of transformation is highest in the 100 pg-1 ng range, so Low transformation efficiency could be because of high amount of DNA used for transformation.

6 0
2 years ago
What branch focuses on the living and non-living parts of the<br> environment?
GREYUIT [131]

Answer:

maybe abiotic and biotic..?

I'm not 100% sure what you're looking for, sorry!

Explanation:

3 0
3 years ago
If a predator is eliminated from an ecosystem its prey’s population will likely _______. a. increase b. decrease c. stay the sam
Natalija [7]
A. If the prey isn’t getting killed, they will continue to increase the population until they hit their max (due to resources).
6 0
2 years ago
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