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3 years ago

If a cell has four chromosomes how many copies of the genetic material are there in each chromosome?

Biology

1 answer:

kvv77 [185]3 years ago

7 0

Their are 2 copies of the genetic material

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The adhesive property of water is due to

beks73 [17]

Intermolecular hydrogen bonds

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4 years ago

Read 2 more answers

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

3 years ago

Where is the cerebrum located

tester [92]

The cerebrum is a large part of the brain containing the cerebral cortex it lies either in front or on top of the brainstem

6 0

3 years ago

Marissa is testing a hypothesis through experimentation. She believes that immersing ocean coral in carbonic acid will slow the

motikmotik

Answer:

The answer choices to this question are:

A) She releases cement particles into a random number of the coral samples.

B) She uses three different types of coral to establish her dependent variables.

C) She treats the coral samples identically with varying levels of carbonic acid.

D) She obtains her coral samples from coral reefs surrounding different continents.

Best Answer is:

A) She releases cement particles into a random number of the coral samples.

Theory:

It has been researched that ocean acidification caused by carbon dioxide emissions causes a decrement in the coral reef growth and this will keep slowing down unless steep and rapid reductions in greenhouse gas emissions are made. And the Coral reefs offered economic opportunities would advantage the surrounding communities from fishing and tourism.

i did this question so thats why i know the answer choices

hope this helpsss

5 0

3 years ago

A die is rolled 90 times to see if it is fair. The table below shows the outcomes. Fill in the table with the expected counts.

vfiekz [6]

Answer:

Explanation:

1,12,2,18,3,15,4,21,5,11,6,13

8 0

3 years ago