An amphibian heart is shown in the diagram.
Which statement best describes the three chambers of the
heart?
Y receives oxygen-rich blood, X receives carbon dioxide
rich blood, and Z pumps blood.
Z receives oxygen-rich blood, X receives carbon dioxide
rich blood, and Y pumps blood,
X receives oxygen-rich blood, Y receives carbon dioxide
rich blood, and Z pumps blood.
Y receives oxygen-rich blood, Z receives carbon dioxide
rich blood, and X pumps blood.
Y
Z

Answer:

D. Limited food

Explanation:

Natural selection is caused by some sort of competition within a population where the organisms with the "better" traits live longer

The cause of natural selection among the following is limited food. So option D is correct.

Natural selection is the natural process by which organisms that are more well-adapted to their environment are more likely to survive and multiply.

The process of natural selection can also result in speciation, which is the process by which one species produces a completely different offspring. In positive Darwinian evolution, few types of genes are favored because they increase the likelihood of reproduction or survival. This increases the rate of evolution.

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Answer:

What caused Galetown to have more severe rainstorms? The lake, warmer weather, and stronger winds all caused the most recent storm to have the greatest amount of rain. The addition of the lake caused there to be more water available to evaporate into water vapor in the air parcel

Final answer:

The greatest amount of rain during the most recent storm in Galetown can be explained by the combination of storm surges, erratic storm pathways, and possibly the effects of climate change leading to increased storminess and enhanced water vapor transport.

Explanation:

The greatest amount of rain during the most recent storm in Galetown can be attributed to several factors. One crucial component is the presence of a storm surge, which refers to the rising of the sea as a result of atmospheric pressure changes and wind associated with a storm. This not only creates immediate coastal flooding but also can contribute to higher rain levels inland.

Furthermore, storms with erratic pathways, such as Hurricane Harvey, can lead to unprecedented rainfall accumulation because they linger in one area and continue to draw and dump moisture. Historical data and recent observations such as the addition of a new color to the National Weather Service's maps for rain in Houston, Texas, in 2017 highlight the enormity of rain from such stagnant storms.

Additionally, there is evidence that climate change may be playing a role in increasing rainfall totals, referred to as storminess, where an increased incidence of major rainstorms has been observed. Moreover, extreme rainfall events depend on the strong horizontal transport of water vapor into the storm from the surrounding atmosphere, which can exceed the atmospheric water vapor's capacity to hold moisture over a given land area.

Answer:

An esuarie is the tidal mouth of a large river, where the tide meets the stream.

An estuary may be defined as a type of ecotone that illustrates a transitional zone of the freshwater river ecosystem and marine water ocean ecosystem.

An ecotone may be defined as a type of transitional zone where two ecosystems meet with each other. In a more simple sense, it is defined as the zone between to ecosystems.

In an ecotone, characteristics of both ecosystems are present, hence ecotone has high biodiversity as compared to both ecosystems. It is known as the edge effect.

When we talk about an estuary, it is an ecotone that comprises two ecosystems like a river and an ocean ecosystem. The water of the river is fresh while the ocean is salty.

Therefore, an estuary may be defined as a type of ecotone that illustrates a transitional zone of the freshwater river ecosystem and marine water ocean ecosystem.

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Answer:

fungus is the answer

Explanation:

it decomposes

Answer:

Radiation

Explanation:

emission of energy as electromagnetic waves or as moving subatomic particles.

have a good day

-Hops

Answer: A we are half way to the center of the milky way

Explanation:

we are in the oron arm in the milky way and that is half way through the galaxy

Answer:

It would help the zookeeper in their breeding program so as not to interbreed the four different species, but rather to breed each species seperately, so as to keep the giraffe as a whole from population pollution by producing hybrids that do not have much conservation values.

Knowing that giraffes are four distinct species could change the approach of conservationists and zookeepers who work with giraffes by requiring different conservation strategies and breeding programs for each species.

Giraffes are now recognized as four distinct species: the southern giraffe, the Masai giraffe, the reticulated giraffe, and the northern giraffe.

This new understanding of giraffes as separate species could change the approach of conservationists and zookeepers who work with giraffes by requiring different conservation strategies and breeding programs for each species.

Conservationists and zookeepers would need to consider the specific habitat requirements, feeding preferences, and social behaviors of each species in order to effectively protect and care for them.

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Answer:

I can't see the pictures but I'm guessing the enviroment

they're in probably causes a difference in their beaks.

Plants, algae, and cyanobacteria use sunlight energy to create organic matter from carbon dioxide as well as water. This marks the start of energy flow during almost all food webs.

A food chain is a network of links in a food web that begins with producer organisms and ends with a top predator, detritivore, or decomposer species.

A food chain also demonstrates how organisms are related to one another through the food they consume. Each trophic level is represented by a different level of the food chain.

Food chains are significant because they reveal the intricate relationships that exist in ecosystems. They can reveal how each organism is dependent on another for survival.

Food chains also show what happens when there is a problem and a producer or consumer is lost.

Sunlight energy is used by plants, algae, and cyanobacteria to produce organic matter from carbon dioxide and water. This is the beginning of energy flow in almost all food webs.

Thus, this way, the producers use sun’s energy and make it available to other organisms.

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Final answer:

Producers, or autotrophs, such as plants, use the sun's energy to create organic compounds through photosynthesis. They are essential parts of food chains and food webs as they make this energy available to other organisms. Producers are crucial for the flow of energy and matter within ecosystems.

Explanation:

The organisms that use the sun's energy and make it available to other organisms within an ecosystem are known as producers, or autotrophs. Producers are typically plants and other photosynthetic organisms that capture sunlight and convert it into chemical energy through the process of photosynthesis. This energy in the form of organic compounds is then passed on to other organisms, called consumers, within the food chain that feed on these producers or on other consumers.

In a food web, these producers form the base and are vital for the flow of energy and matter through the ecosystem. Without producers, other organisms would not have the necessary energy to survive. Thus, producers play a key role in ecosystem dynamics and in maintaining the balance of the food chain and food web.

Answer:

i think it would be option B

hope this helps

Light-colored moths were selected for on light-colored trees best describes the process that produced one of the ending populations of moths. Hence option D is correct.

Natural selection is a process by which certain traits or characteristics become more or less common in a population over time, based on their ability to help organisms survive and reproduce in their environment.

This statement refers to the classic example of natural selection in peppered moths, which were studied during the Industrial Revolution in England.

Before industrialization, the majority of peppered moths had light-colored wings, which provided camouflage on light-colored tree trunks, where they would rest during the day.

However, as industrialization caused pollution to darken the tree trunks, dark-colored moths became more visible to predators, while light-colored moths became better camouflaged.

As a result, the light-colored moths were more likely to survive and reproduce on light-colored trees, passing on their light-winged trait to their offspring.

Therefore, option D is the best statement that describes the process that produced one of the ending populations of moths.

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Answer:

Vertebrae

Explanation:

Your back can't be a solid bone because you wouldn't be able to pick things up off the ground, or twist around to see things.

Answer:

Vertebrae

Explanation:

Vertebrae are the 33 individual bones that interlock with each other to form the spinal column. The vertebrae are numbered and divided into regions: cervical, thoracic, lumbar, sacrum, and coccyx.

Answer:

Explanation:

Frogs begin their lives in the water as eggs and then tadpoles and when they are fully developed they live on land.

Frogs are said to have “two lives” because they undergo a complete metamorphosis, meaning that they change form completely from one stage of life to another.

In their early life, frogs are called tadpoles. Tadpoles live in water and have gills for breathing. They eat algae and other small organisms. As they grow, tadpoles develop legs and lungs. They also lose their gills and become able to breathe air.

When tadpoles are fully grown, they metamorphose into frogs. Frogs live on land and have lungs for breathing. They eat insects and other small animals. The change from tadpole to frog is a dramatic one, and it is why frogs are said to have “two lives.”

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Answer:

TAACGGCATTGGCTA

Explanation:

T-A

G-C

Answer:

Cell divison is defined as the process in which a parent cell split into two or more daughter cells. There are three stages of cell division that includes interphase, mitosis/meiosis and cytokinesis.

In the interphase the proteins, enzymes and cell organelles are formed and at the end of this phase single strand chromosome becomes a double strand carrying genes.

In the meiosis (in sexual reproduction) or mitosis (asexual reproduction) phase, divison of nucleus takes place. Meiosis gives rise to geneticaly different cells due to crossing over while mitosis leads to  identical cells .

Cytokinesis occurs cocurrently after meiosis or mitosis in which cytoplasm of a parental cell divides into two daughter cells each with identical chromatin.

Creation of new animals are also undergo these 3 stages of cell division that is interphase, meiosis (eukaryotes)/mitosis (prokaryotes) and cytokinesis. Majority of animals (eukaryotes) undergo meiosis phase because their mode of reproduction sexual and have genetic variation due to crossing over of chromosomes and produces 4 daughter cells at the end cell division.

Hence, the 3 stages of cell division is similar to craetion of new animals.

Answer:The carbon cycle plays a key role in regulating Earth's global temperature and climate by controlling the amount of carbon dioxide in the atmosphere. The greenhouse effect itself is a naturally occurring phenomenon that makes Earth warm enough for life to exist.

Explanation:

Carbon can be stored in various reservoirs for long periods as part of the carbon cycle, including the atmosphere, oceans, sediment, soil, rocks, and Earth's interior. It can potentially have adverse effects on ecosystems when it enters the atmosphere as CO2.

The carbon once it ends up in a reservoir can be stored for long periods as part of the carbon cycle. Carbon reservoirs include the atmosphere, bodies of liquid water (mostly oceans), ocean sediment, soil, rocks (including fossil fuels), and Earth's interior. Carbon can enter the atmosphere again as CO2, which can potentially have adverse effects on ecosystems.

Answer: Because they have different genes, or they might be the opposite gender.

Explanation:

Answer:

Explanation:

D:Nucleus

B: Cell wall

F: vacuoles

G: Endoplasmic reticulum (ER)

E: Golgi Body

C: Also Endoplasmic Reticulum (ER)

Answer:

Their environment makes them change slowly over time.

Explanation:

Answer:

Their environment makes them change slowly over time.

Explanation:

i got it right on the test

Answer:

The water cycle uses plants for uptake of water and transpiration from the surface, so that water can be sent to the atmosphere. Carbon cycle uses plants for uptake of CO2, by which it is removed from the atmosphere

Explanation:

The carbon and water cycles are similar as they involve movement and transformation of substances in different reservoirs. Both play crucial roles in maintaining life on Earth.

The carbon cycle and the water cycle are similar in several ways:

Overall, the carbon cycle and the water cycle are interconnected processes that involve the movement and transformation of substances on Earth.

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Answer:

(3) Rusting of almirah is a chemical change since during rusting, a new chemical compound called hydrated iron oxide (rust) is formed. ... (7) Making a fruit salad with raw fruits is a physical change since there is no change in the chemical properties of the fruits but only the physical appearance has changed.

Explanation:

I just got it right on my test

Answer: False; a physical change

Explanation: A chemical change would be for instance if you add a fire and change its chemical property. So this would be a physical change because only its physically appearance has changed.

Answer:

Hi there

Erosion is responsible for the formation of glaciers

Hope it will help you

Explanation:

erosion is responsible for formation of glaciers

Answer:

Environmental factors and climate conditions affect the growth and how fast they grow.

Explanation:

An echinoderm is an organism (all marine) that has a spiny skin. The word "echinoderm" means "spiny skin." Starfish, sea cucumbers, brittle stars, and sea urchins are examples.

Most echinoderms develop from larvae to adolescent echinoderms by direct, or indirect development. In direct development, the fertilized egg is able to enter juvenile stage without becoming a larva. The juveniles stay close to the parent, and are cared for and looked after.

Echinoderms evolved from animals with bilateral symmetry. Although adult echinoderms possess pentaradial, or five-sided, symmetry, echinoderm larvae are ciliated, free-swimming organisms that organize in bilateral symmetry which makes them look like embryonic chordates.

Echinoderms have adapted to match the colour of their surroundings. Also, to protect and structure their bodies, Echinoderms such as sea urchins have interlocking plates of Calcium Carbonate which form a very hard internal skeleton.

Final answer:

The correct components of a DNA nucleotide are thymine, deoxyribose, and cytosine, making option D the correct answer for a nucleotide of DNA. So the correct option is D.

Explanation:

To determine which of the following are most likely parts of a nucleotide of DNA, we need to understand the components that make up a nucleotide in DNA. A DNA nucleotide is composed of three main parts: a 5-carbon sugar called deoxyribose, a phosphate group, and a nitrogenous base. DNA contains four types of nitrogenous bases: adenine (A), guanine (G), cytosine (C), and thymine (T). Notably, uracil (U) is not found in DNA; it is instead found in RNA and replaces thymine as a nitrogenous base.

Among the options provided, the most accurate parts that would be found in a DNA nucleotide are thymine, deoxyribose, and cytosine. Therefore, the correct answer is:

D. thymine, deoxyribose, cytosine

Answer:

A, They break down dead organisms and add nutrients back to the soil that plants use.

Explanation:

Decomposers do do this, and they don't do the other two options so this would be the best option. Hope this helped :)

Answer:

D

Explanation:

The answer is D, even though they also need a host cell to reproduce that is not mentioned in the table so the answer is D.

The data support classifying viruses as nonliving because they do not take in nutrients, lack independent metabolic processes, and cannot grow or develop independently. Option D is correct,

Answer: DNA replication is important because it creates a second copy of DNA that must go into one of the two daughter cells when a cell divides. Without replication, each cell lacks enough genetic material to provide instructions for creating proteins essential for bodily function. DNA is generally tightly packed into a structure called chromatin.

Explanation:

It is important for DNA to be duplicated exactly before a cell divides because one copy of DNA transfers into the nucleus of the daughter cell.

DNA duplication is also known as DNA replication. A double-stranded DNA molecule is copied to create two identical DNA molecules through the process of DNA replication.

Because every time a cell splits, the two new daughter cells must have the same genetic material, or DNA, as the parent cell, replication is a crucial process. All living things replicate their DNA, which is the primary mechanism for biological heredity.

Thus, it is important for DNA to be duplicated exactly before a cell divides because one copy of DNA transfers into the nucleus of the daughter cell.

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