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3 years ago

Which of the following describes a DNA mutation?

Biology

2 answers:

aivan3 [116]3 years ago

8 0

Answer is A! Hope this helps

Sergio039 [100]3 years ago

6 0

Answer:

Explanation:

messes with the chromosomes

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What trait distinguishes between the kingdoms of bacteria and archaea?

makvit [3.9K]

Answer:

Their Cell walls

Explanation:

Bacteria has a cell made up of peptidoglycan
Archaebacteria has a cell wall made of various compounds)
Their rRNA is different, so different taht tehy are placed on different part of the evolutionary tree.

8 0

3 years ago

Read 2 more answers

Please help me thank you

trapecia [35]

Answer:

The punnet square would look like this.

R R

R RR RR

B RB RB

6 0

3 years ago

All of the chemical reactions within an organism is known as

Usimov [2.4K]

Chemical reactions that take place inside living things are called biochemical reactions. The sum of all the biochemical reactions in an organism is called metabolism.Metabolism includes both exothermic (energy-releasing) chemical reactions and endothermic (energy-absorbing) chemical reactions.

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3 years ago

Which of the following best explains the flow of energy in this food web?

Gnoma [55]

Answer:

Plants → Grasshopper → Snake → Mushrooms

Explanation:

Read it from the sun, then it points to the grass, then grasshopper, then snake, then mushroom.

3 0

2 years ago

When a living organism dies, it stops taking in new carbon. Thus, as the radioactive carbon-14 decays, the ratio of carbon-12 to

Alexxandr [17]

Answer: The fossil is 11459 years old.

Explanation:

Half-life of carbon-14 = 5700 years

First we have to calculate the rate constant, we use the formula :

$k=\frac{0.693}{5700\text{years}}$

$k=1.21\times 10^{-4}\text{years}^{-1}$

Now we have to calculate the age of the sample:

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant = $1.21\times 10^{-4}\text{years}^{-1}
t = age of sample = ?
a = let initial amount of the reactant = 100 g
x = amount decayed = 75 g
a - x = amount left after decay process = 100 - 75 = 25 g Now put all the given values in above equation, we get
[tex]t==\frac{2.303}{1.21\times 10^{-4}}\log\frac{100}{25}$

$t=11459years$

The fossil is 11459 years old.

4 0

3 years ago