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2 years ago

What is the object of mitosis? What mechanism in mitosis allow this to occur?

Biology

1 answer:

Charra [1.4K]2 years ago

5 0

To produce two diploid daughter cells that are identical to each other

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The sun is located .................. of the solar system

CaHeK987 [17]

In the Milky way galaxy

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2 years ago

How is enthalpy used to predict whether a reaction is endothermic or exothermic?

Radda [10]

Answer:

$329.48 KJ/mol$ heat is released by the combustion of $2 mol$ of methane

Explanation:

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).

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

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

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

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

$= -787 KJ/mol+1116.48 KJ/mol$

$=329.48 KJ/mol$

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

3 0

2 years ago

A marine ecologist counts the number of crabs in three different intertidal regions that are each two hectares. The crab counts

romanna [79]

Answer:

Density is nearly 3 cabs per hectare

Explanation:

Given -

There are three three intertidal regions.

Area of each intertidal region is $2$ hectares.

Number of crab in the intertidal regions are as follows -

Intertidal region I - 7

Intertidal region I - 2

Intertidal region I - 6

Sum of crabs in all three regions is equal to

$7 + 2+ 6\\= 15$

Total area of all three intertidal regions is equal to

$2 + 2+ 2\\= 6$ hectares

Now density per hectare is equal to total population of crab divided by total area of all the three intertidal regions

Density $= \frac{15}{6} \\= 2.5$

Density is nearly 3 cabs per hectare

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2 years ago

Which statement is the most accurate prediction of what would happen it a new

andreyandreev [35.5K]

Answer:

A moray eel eats a fish swimming by. Predators are organisms that eat other organisms. If this helps, thank me. If this really helps, thank me and, crown me brainliest answer. Also, rate, and comment. This helps me to improve answering, and helps you to get a better answer.

Explanation:

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2 years ago

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19 Recall DNA and Genes

MrRa [10]

DNA is located in the nucleus of the cell.

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3 years ago

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