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AlexFokin [52]
3 years ago
10

Which job must enzymes do before replication can begin?

Biology
1 answer:
Scorpion4ik [409]3 years ago
4 0

Answer:

Before they replicate the two DNA strands need to separate from each other.

Explanation:

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Before a captive breeding program and subsequent reintroduction of the black-footed ferret it is believed that their total popul
irga5000 [103]

Answer:

a) 99.93%

b) 99.98%

Explanation:

Given that:

Total population size was only around 18 individuals ( for  black-footed ferret)

If the annual survival rate in the wild was 0.4%.

a)

What is the probability that all 18 would have died in a single year?

To find that; we multiply the annual survival rate in the wild with the total population; which is:

(0.4%×18) = 0.072%

Then; we subtract it from a total of 100% in order to determine the probability that all 18 would have died in a single year.

= (100.00% - 0.072%)

= 99.93%

b)

What is the probability that all 18 would have died in a single year if canine distemper was present?

Given that;

Because of the presence of canine distemper disease, the annual mortality rate might have been as high as 0.89.

To determine the probability; we have:

1 - Annual mortality rate = annual survival rate

1 - 0.89 = 0.11 %

Therefore, 0.11% of 18 individuals = (0.0011 × 18)

= 0.0198%

Probability that all 18 would have died in a single year if canine distemper was present = 100 - probability of annual survival rate

= (100 - 0.0198)%

= 99.98%

7 0
3 years ago
_____ is the main energy source for all life on earth. Chlorophyll Water Sunlight Nitrogen
mafiozo [28]

Answer:

sunlight

Explanation:

7 0
3 years ago
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Hypothesis: In this section, please include the if/then statement you developed during your lab activity. This statement reflect
Sonja [21]
...carbon dioxide levels will Increase
.... temperatures will Increase
6 0
2 years ago
Which of the following situations accurately describes a difference between a food chain and a food web? Select one:
Natasha2012 [34]
Lets look at your first question. A food chain is a linear (line) relationship between organisms. It shows who eats what and who gets eaten. The energy is passed up the chain from one organisms to the next. A food web is a series of interconnected food chains. It can show one organism being preyed upon by several predators. The answer choice A is really referring to an energy pyramid, but it is true in any ecosystem that only 10% of available energy is passed to the next trophic level. B and C are both true statements as well. D is completely false because 90% of energy is lost, not retained. So with that said, there is more than one correct answer here. I have included a diagram so you can see the difference between the two. 

For Question 8, the key to understanding this is that sunlight is the main source of energy for any ecosystem. Plants (autotrophs) use the sunlight to convert it to sugars (glucose) which is a compound that heterotrophs can utilize. This process is called photosynthesis. :-) 

Question 9: So in a food chain, you typically start with the producers (plants), then to the primary consumer, then secondary consumer, then tertiary consumer, and in some cases you may have a quaternary consumer. That is 4 links. However, we are forgetting the role of decomposers at all levels of this food chain, and that would add an extra link. In summary, you wouldn't typically see more than 5 links in a food chain. 

I hope all of my explanations are helpful! Good luck! :-) 

6 0
3 years ago
Read 2 more answers
Which of the following correctly compares how plant and animal cells differ?<br> (4 points)
a_sh-v [17]

Answer:Which of the following correctly compares how plant and animal cells differ? Plant cells have a cell membrane and cell walls for support, but animal cells do not have cell walls. ... Animal cells have DNA in their nuclei and mitochondria, while plant cells have it in their nuclei, mitochondria, and chloroplasts.

Explanation:

HOPE THIS HELP YU  ALOT REMDEMDER ADD ME ON BRAINLY

7 0
3 years ago
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