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Earth's early atmosphere was made of various gases that were unsuitable for life on Earth. Match the following elements with how they ended
up in the current atmosphere.
nitrogen
carbon dioxide and water vapor
helium
released into the atmosphere during volcanic eruptions
formed due to the transformation of ammonia (NH3)
mostly escaped Earth's atmosphere due to it is light mass

Answer:

Sometimes, there can be random fluctuations in the numbers of alleles in a population. These changes in relative allele frequency, called genetic drift, can either increase or decrease by chance over time. ... Genetic drift can result in the loss of rare alleles, and can decrease the size of the gene pool.

Genetic drift in a population affects the gene pool by decreasing genetic variation.

Genetic drift is a mechanism of evolution that occurs due to random fluctuations in the frequency of alleles (alternative forms of a gene) in a population. It refers to the random changes in the frequency of alleles that occur by chance alone, rather than through natural selection or other selective pressures.

Genetic drift is more likely to occur in smaller populations, where chance events can have a greater impact on the frequency of alleles. The effects of genetic drift can result in the loss of certain alleles from a population over time, or the fixation of one allele in a population, meaning that it becomes the only allele present at that particular gene locus.

Two forms of genetic drift are bottleneck effect and founder effect. In the bottleneck effect, a sudden reduction in population size can cause the loss of genetic diversity, while in the founder effect, a small group of individuals colonizes a new area, leading to the establishment of a new population with a limited subset of the genetic diversity present in the original population.

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Answer:

Erythrocytes low in BPG does not unload O2 very well.

Answer:

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Explanation:

Hey (☞ﾟ∀ﾟ)☞ It's the Explanation Wizard here for your troubles I don't wanna waste time so here is my answer+explanation that I have personally wrote for you.The first question you asked here's the a+e The sliding filament model describes the process used by muscles to contract. It is a cycle of repetitive events that causes actin and myosin myofilaments to slide over each other, contracting the sarcomere and generating tension in the muscle. second a+e for second question When the nervous system signal reaches the neuromuscular junction a chemical message is released by the motor neuron. The chemical message, a neurotransmitter called acetylcholine, binds to receptors on the outside of the muscle fiber. That starts a chemical reaction within the muscle. Explanation Wizard out

Answer: B

Explanation:

Just did the test

The statement that can be made about the information is: "Some mammals need to find food to survive."

Mammals are a diverse group of animals that are found all over the world and come in many different shapes, sizes, and types.

All mammals share certain key characteristics, including the fact that they are warm-blooded, have hair or fur, and feed their young with milk produced by their mammary glands.

While the information given in the first sentence provides a list of mammals, it does not provide any information about their specific behaviors or characteristics, such as the use of echolocation or means of transportation.

However, the statement that "some mammals need to find food to survive" is true for all mammals, as food is a basic necessity for the survival of all members of this animal group.

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Answer:

descent with modification

Answer:

Altruistic behavior, such as sterile worker ants caring for the offspring of their queen, evolves only between related individuals through what is known as kin selection — or so many evolutionary biologists have thought since the 1960s.

Answer:

Bread, beans, milk, popcorn, potatoes, cookies, spaghetti, soft drinks and corn etc.

Explanation:

Bread, beans, milk, popcorn, potatoes, cookies, spaghetti, soft drinks and corn etc are the main sources of carbohydrates. In these foods, carbohydrates are present in large amount which is a quick source of energy for us. The breakdown of carbohydrates starts from the mouth when the food mixes with saliva which contains an enzyme that starts breakdown of carbohydrates into micromolecules is called glucose that can be absorbed by our body for the production of ATP molecules.

Answer:

Phosphorylation activation:

1- p53 (transcriptional activator)

2- CDK8-cyclin C (transcriptional inhibitor)

Explanation:

Phosphorylation is a well-studied post-translational modification mediated by a protein called 'kinases' which phosphorylates specific protein substrates. This post-translational modification (phosphorylation) acts as a reversible switch capable of modulating protein function. Phosphorylation at specific amino acid residues (e.g., tyrosine, serine) controls protein function by triggering conformational changes in the phosphorylated protein. For example, P53 is a transcription activator activated by phosphorylation at multiple sites in its N-terminal region. P53 activates transcription of different genes by modulating protein-protein interactions with different substrates (e.g., MDM-2, CBP/p300, TFII). On the other hand, cyclins are proteins that have no enzymatic activity but are able to activate cyclin-dependent kinases (CDKs) by binding to them. CDK8-cyclin C (SRB10-SRB11) is a negative regulator of transcription that is able to inhibit transcription by phosphorylating the carboxy-terminal domain of the largest subunit of RNA polymerase II (Pol II) before the formation of the preinitiation transcriptional complex.

Answer:

Main effects of adrenaline exerted on smaller arterioles and precapillary sphincters although veins and large arteries also respond to the drug. It constricts vessels of skin & mucus (mucous) membrane. It dilates BV of skeletal muscles. Thus net results of this is, decrease in the peripheral resistance.

Explanation:

HOPE IT HELPS

Answer:

adreneline triggers the body's fight or flight response.this reaction causes air passages to dilate to provide muscles with oxygen they need to fight danger or flee

Answer:

Answer is A

Explanation:

Urea consists of carbon, nitrogen and oxygen. You can find it in urine, sweat, blood and milk in mammals. In its most concentrated form, it is urine. Urea is a crystalline compound, and the nitrogen content is always at least 46 percent when dry.

Option D is the correct option..

D. The amount of heat required to raise the temperature of 1 g of a

substance by 1°C

Answer:

white blood cells that systematically envelop and kill pathogens such as bacteria, viruses, and fungi, worn-out body cells, and cells that have become cancerous. their surface fragments, called antigens, literally antibody generators.

Explanation:

Answer:

A meteor, before entering earth's atmosphere is known as a meteoroid

Answer:

Provide an enormous surface area that facilitates absorption.

Explanation:

The villi of the small intestine provides an enormous surface area that facilitates absorption of nutrients from the small intestine. The cells present on the villi are packed full of tiny hair-like structures called microvilli. It performs the same function as villi perform in the small intestine i.e. absorb nutrients. Villi are surrounded with cells that help in the absorption of nutrients from the food that passes through it.

Answer:

I think it is by planting a spore

Answer:

The birds can now reach the Island.

Explanation:

The birds can now reach the Island because there is a sandbars and tiny Islands where they can rest for sometime as well as feed on the insects present at that sandbars and tiny Islands. Before these sandbars and tiny islands, the birds can't reach to the mainland due to large distance between Island and mainland so they have no capability to fly such large distance until the tiny Island and sandbars are appeared in the ocean.

Answer: an increase in gene flow between the bird populations

Explanation: :)

Answer:

they are quickly used by the body, and are typically quick source of energy. They can be found in almost all sort of food. The composition of Carbohydrates are consisted of Carbon, Hydrogen, and Oxygen.

Answer:

False

Explanation:

Answer:

Step 2: The right ventricle pumps the oxygen poor blood to the lungs via pulmonary valve. Step 3: The left atrium receives oxygen -rich blood and pumps it to the left ventricle. Step 4: The left ventricle pumps the oxygen-rich blood via aortic valve, submitting this blood through the entire body.

Explanation:

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Answer:

Synthesis Of Osmoprotectants

Explanation:

One Mechanism Halophiles use to survive in high concentrations of salt is the Synthesis Of Osmoprotectants, which are also known as compatible solutes. These work by balancing the internal osmotic pressure with the external osmotic pressure, making the two solutions isotonic, or close to it.

Answer:

The correct answer is -

nucleus - reproduction, mitochondria- reproduction, golgi apparatus - waste production, endoplasmic reticulum - growth, ribosomes - growth, lysosomes- waste production, vacuoles - growth, cell membrane - interaction with the environment, chloroplast - uses energy, cell wall - interaction with the environment

Explanation:

A Cell has various organelles with more than one generic function such as the nucleus not just play role in cell reproduction but also plays role in regulating other organelle and cell growth by transcription. Mitochondria produces and provides energy for many functions such as growth, reproduction and substance transport.

Golgi apparatus package proteins and wastes to transfer them out of the cell. The ndoplasmic reticulum modifies the protein produced by ribosomes and helps in growth of the cell. Lysosomes digest waste and cell debris by lysosomal vesicles. Cell membrane and cell wall interact with outer environement.

Answer:

A 6 to 8 hours. After you eat it takes about 6 to 8 hours for food to pass through your stomach and small intestine.

Answer:

a tropical location as an area near the equator a temperate location is any area that that lies between the tropical and polar zones and a tundra is the coldest of all the biomes. Tundra comes from the Finnish word tunturi, meaning treeless plain. It is noted for its frost-molded landscapes, extremely low temperatures, little precipitation, poor nutrients, and short growing seasons.

Answer:- They are coelemate

-The body is covered with thin curticle

-They are triploblastic

-The have long and segment bodies

-Annelidas are bilaterally symmetrical

Answer:

The answer is "4 and 2 ".

Explanation:

The overall glycolysis ATP number is 4 of one hydroxyl group. In the first part of the glycolysis 2 ATP molecules are used, so that 2 ATP molecules are net gained. 2. In addition, 2 NADH atoms in the glycol are also created. This is why the total ATP molecules produced during metabolism are 4, resulting in a net output of 2 ATP.

Answer:

me

Explanation:

bcox help finish come me

Answer:

Glucose and ATP are used for energy by nearly all living things. Glucose is used to store and transport energy, and ATP is used to power life processes inside cells. Many autotrophs make food through the process of photosynthesis, in which light energy from the sun is changed to chemical energy that is stored in glucose.

Explanation:

Most organisms use glucose and ATP for energy. ATP powers cells, and glucose stores and transports energy. Photosynthesis converts sunlight into glucose for many autotrophs.

All living things use ATP and glucose as energy sources. Energy is stored and transported by glucose, and cellular life functions are powered by ATP. Through the process of photosynthesis, which converts solar light energy into chemical energy that is stored in glucose, many autotrophs produce food.

Glycogen is the name given to this form of glucose that is stored and is composed of several linked glucose molecules. Glycogen is broken down to release glucose into the bloodstream, which is then used as fuel for the cells, when the body needs a sudden surge of energy or when the body isn't obtaining glucose from food.

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