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2 years ago

What hormone makes girls emotional on their period

Biology

1 answer:

tester [92]2 years ago

3 0

Answer:

estrogen and progesterone

Explanation:

both are the major hormones for emotional and physical changes

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The central dogma of molecular biology states that DNA is _______ into mRNA, which is then translated into polypeptides.

Gnom [1K]

1. transcribed

2. cytoplasm

3. transfer RNA

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2 years ago

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Explain why organisms are more likely to be well preserved in mud than in sand? Justify your response in

xenn [34]

Answer:

Explanation:

Organisms are well preserved in mud because mud has high water holding capacity. It retains water and does not allow oxygen flow which can destroy the remains of organisms. There are some microbes that preserved whose growth are enhanced in water related environment like mud.

But sand cannot retain or hold water. It drains it off and all oxygen bearing water to flow which enhance decay compared to mud. It can't preserve organisms because of the above reasons.

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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.

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2 years ago

How is light energy converted into chemical energy during photosinthesis?

qwelly [4]

Light energy (from the sun) is used to convert carbon dioxide and water into glucose and oxygen in the process of photosynthesis.
carbon dioxide + water --> glucose + oxygen
the light energy from the sun is then trapped in the glucose. in order to retrieve the chemical energy stores within the molecule, the bonds have to be broken.

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3 years ago

Which fossils occurs on the most landmasses

Sonbull [250]

The Glossopteridales occur on the most landmasses

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2 years ago

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