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Lorico [155]
2 years ago
8

Energy transfer is essential to all functions for life on earth. There must be energy to drive the reactions for metabolism and

other functions. Energy flows from one chemical bond to another. Breaking covalent bonds in molecules results in:
Biology
1 answer:
Inessa05 [86]2 years ago
4 0

Answer: Breaking covalent bonds in molecules results in the dissipating the energy of atoms held together in molecules.

Explanation: By way of introduction,

Covalent bonds are one of four types of chemical bonds. The other three are ionic bonds, metallic bonds and hydrogen bonds. Each bond type differs in the way atom share electrons. In covalent bonds, two atoms completely share one or more pairs of electrons. These bonds are quite strong.

Covalent bonds form between atoms when the total energy present in the newly formed molecule is lower than the energy present in each of the atoms alone. The lower energy when bonded results from the fact that atoms are more stable when their outer electron shells are full. Atoms can fill their outer shells by sharing electrons with other atoms though the formation of covalent bonds.

It is important to know that there is a symmetrical relationship between the amount of energy released during the formation of a covalent bond, the amount of energy needed to break the bond. Breaking covalent bonds requires energy, and covalent bond formation releases energy.

This energy is measured as heat using the units joules or calories or kilocalories.

The amount of energy released during molecule formation can be estimated by counting the number and types of bond in a molecule. For instances, a methane molecule has one carbon atom bound to four hydrogen atoms via four single carbon-hydrogen covalent bonds. Carbon-hydrogen bonds release 100 kcal/mole of energy when formed, so the total energy needed to break all the bonds in a methane molecule is 100 kcal x 4 or 400 kcal.

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What is the source of the energy that<br> flows through most of the food chains on<br> Earth?
Doss [256]

Answer:

the corret answer is the sun

Explanation:

The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water.

6 0
3 years ago
Which ecosystem has the highest density of living things?
vlabodo [156]

Answer:

The Amazon Rainforest

Explanation:

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Use the following words to fill in the blanks: nucleus, base-pairing, transcription, translation, genes, cytoplasm, polypeptide
Mkey [24]

Answer:

Use the following words to fill in the blanks: nucleus, base-pairing, transcription, translation, genes, cytoplasm, polypeptide chain, structure, ribosome, proteins, protein synthesis, cytosine, adenine, uracil, tRNA, mRNA, amino acid, DNA, RNA polymerase, codon.

DNA is made up of segments called  nucleotides

. Genes provide the coding to create  codon

. Proteins are created through the processes of  translation

and  transcription

. Together these processes are known as  protein synthesis

. The first step in protein synthesis is transcription, where translation

is used as the template for the creation of an mRNA strand. The enzyme,  RNA  Polymerase

matches up the correct bases, using  base-pairing

rules. When adenine is found on the DNA strand,  cytosine

will be the complementary base on the mRNA strand. When thymine is found on the DNA strand,  adenine

will be the complementary base on the mRNA strand.

and guanine are the other two bases that pair with one another. Since DNA is too large to leave the nucleus of the cell,  tRNA

must be created. It is smaller and able to travel outside the  nucleus

of a cell. Next, mRNA leaves the nucleus, heads through the  cytoplasm

towards a  ribosome

where translation occurs. In the ribosome, a  codon

on the mRNA strand (3 bases), connects to the anticodon on a  tRNA

molecule. When the codon and anticodon connect, the  amino acid

on the tRNA molecule detaches, forming a  polypeptide chain

which eventually makes up the protein. Proteins are essential for life because they make up the  structure

of living organisms and help organisms to function.

Explanation:

6 0
3 years ago
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Ecosystem services include processes that increase the quality of the abiotic environment. Which of the following processes woul
slega [8]

Answer:

Option D, only II, III, and IV

Explanation:

Complete Question

Ecosystem services include processes that increase the quality of the abiotic environment. Which of the following processes would fall under this category?

I) Keystone predators have a marked effect on species diversity.

II) Green plants produce the oxygen we breathe.

III) The presence of land plants builds soil.

IV) The presence of diverse wetlands helps in flood control.

A) only II and IV

B) only I and III

C) only I, II, and IV

D) only II, III, and IV

Solution -

The services of ecosystem has been classified into four groups  

a)  Provisioning – Where essential abiotic and biotic substance are produces such as production of food and water, reproducing offspring etc.  

b) Regulating – the ecosystems is controlled through environmental factors such as control of climate and disease

c) Supporting – Ecosystem support the activities that are essential for survival. Primarily includes all nutrient cycles, oxygen generation etc.  

d) Cultural – Provide aesthetic view and  recreational benefits

Option II co mes under supporting service of ecosystem

Option III co mes under Provisioning service of ecosystem

Option IV co mes under Regulating service of ecosystem

Hence, option D is correct

5 0
3 years ago
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vichka [17]
I believe its c...............            .                

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