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Oksana_A [137]
3 years ago
8

Can some explain DNA replication??

Biology
1 answer:
NeTakaya3 years ago
4 0

Answer:

<h3>DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell.</h3>
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2. Blood is carried away from the heart by ____________________________, and it is carried back to the heart by ________________
Elanso [62]
To the heart: pulmonary vein

Away from heart: pulmonary artery
8 0
2 years ago
ANSWER PLZ ASAP!!!!!
Artist 52 [7]
I believe its Intestines
8 0
3 years ago
A controlled experiment should have a control group and at least one experimental group. True or false
Crazy boy [7]

Answer:

true

Explanation:

6 0
3 years ago
How is enthalpy used to predict whether a reaction is endothermic or exothermic?
Radda [10]

<u>Answer:</u>

<em>329.48 KJ/mol heat is released by the combustion of 2 molof methane</em>

<u>Explanation:</u>

The value of enthalpy determines whether the reaction is exothermic or endothermic. If the enthalpy change is positive, then the reaction is endothermic (heat or energy released) and if the enthalpy change is negative then the reaction is exothermic (heat or energy absorbed).

2CH_4(g)+4O_2(g) => 2CO_2(g)+4H_2O(g)

\Delta H \ reaction=[ 2(\Delta HfCO_2)+ 4(\Delta HfH_2O)]-[2(\Delta HfCH_4)+4(\Delta HfO_2)]

                            =2 ( -(393.5 KJ)/mol)-[2( -74.6 KJ/mol)+4(-241.82 KJ/mol)]

                            = -787 KJ/mol-[ -149.2 KJ/mol-967.28 KJ/mol]

                           = -787 KJ/mol+1116.48 KJ/mol

                                          =329.48 KJ/mol

<em>In this question, </em><em>the enthalpy of formation</em><em> has positive value and hence the </em><em>reaction is endothermic</em><em> in which the heat is released. </em>

3 0
3 years ago
A forest fire lightly burned part of the park. The fire added nutrients to the soil. The fire also helped pine cones open and dr
sdas [7]
It is defiantly not a, because only part of the park was burnt. It wouldn't be c, because fire does not cause seeds to fly in. I would say B
8 0
3 years ago
Read 2 more answers
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