Answer:
There are three main types of blood vessels
The arteries (red) carry oxygen and nutrients away from your heart, to your body's tissues. The veins (blue) take oxygen-poor blood back to the heart. Arteries begin with the aorta, the large artery leaving the heart.
Explanation:
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Answer:
It is the Large Vacuole.
Explanation:
I thought it was Lysosome (almost, maybe).
PLEASE ANSWER
Essential Question: What causes the differences in average temperature and the changes
in day length that we associate with change in seasons on Earth?
Answer:
The evidence is valid because it represents how Earth's axial tilt impacts the temperature levels during each season. Conventionally, the Earth has an axial tilt of about 23.4 degrees, and revolves around the sun, ultimately causing seasons.
Explanation:
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Taxonomic classification systems for organisms are similar to many other classification
systems. The illustration below compares the National Football League to the currently
recognized taxonomic structure.
?
?
Phylum
?
?
Family
?
Species
Professional Sports Organization
NFL
Conference
Division
Team
Office/Defense
Position
Player
1 According to the diagram, the level labeled Professional Sports Organizations is most
likely which taxonomic classification?
A Class
B Domain
C Kingdom
D Order
Answer:
Domain
Explanation:
“Professional Sports Organization” is listed at the very top, or 2 tiers above Phylum. 2 tiers above Phylum is Domain.
can anyone answer 1&2 for me? :)
Answer: D A
Explanation:
You need to read and go by each one
Which best describes the effect on weather in an area if low clouds cover the sky during the daytime?
Answer:
Explanation:
jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
Write a 200-word report on your research, using proper grammar, correct spelling, and appropriate punctuation. Make sure you include:
A definition of overgrazing
A discussion on the damage overgrazing can cause
The advantages and disadvantages of each type of grazing
A discussion on the type of grazing you select to use, which includes your justification of why you selected the grazing strategy
Answer:
answer is in explanation before
Explanation:
Overgrazing occurs when plants are exposed to intensive grazing for extended periods of time, or without sufficient recovery periods. It can be caused by either livestock in poorly managed agricultural applications, game reserves, or nature reserves. Overgrazing combined with overstocking has the most damaging outcomes to the world’s natural environment. The scarcity of water resources, water pollution, degeneration of coral reefs, and eutrophication are all connected to overgrazing. The chief polluting elements include farm chemicals and animal wastes.
Types of grazing systems 1. Types of grazing systems Grazing animals (such as cattle, sheep and goats) feed on the leaves and shoots of grass... 2. Zerograzing In this type of grazing system, the animals are not allowed to go out into the pastureto graze.
Overgrazing is defined as the practice of allowing too many livestock to graze on a particular area of land for an extended period. This leads to a decrease in the vegetation cover and the soil's capacity to hold moisture, which results in soil erosion and desertification.
What is overgrazing?There are three types of grazing systems: continuous grazing, rotational grazing, and intensive grazing. Continuous grazing involves leaving livestock on a particular area of land throughout the year. Rotational grazing involves rotating livestock to different areas of land to prevent overgrazing. Intensive grazing involves keeping livestock in smaller paddocks and rotating them frequently.
Hence, overgrazing is defined as the practice of allowing too many livestock to graze on a particular area of land for an extended period. This leads to a decrease in the vegetation cover and the soil's capacity to hold moisture, which results in soil erosion and desertification.
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Interactions that destabilize the system to have feedback
Answer:
A negative feedback loops is when glucose levels get too high, the body releases insulin into the bloodstream to get back to normal blood levels.
Texto donde se desarrolle la definicion de seleccion natural. Además, empleem los siguientes terminos: Variabilidad, mecanismo selectivo y Darwin.
Answer:
la selección natural es el mecanismo principal por el cual la evolución ocurre
Explanation:
Charles Darwin fue un naturalista inglés que propuso la teoría de la evolución o 'descendencia con modificación' mediante el mecanismo de selección natural. Acorde a esta teoría, la selección natural se define como el mecanismo selectivo de reproducción diferencial de los individuos mejor adaptados a su ambiente. La variabilidad es el la materia prima sobre la cual la selección natural actúa, seleccionado aquellos individuos que presentan combinaciones fenotípicas y genotípicas más adaptadas para sobrevivir en un ambiente en particular. Los individuos de una población que son 'superiores adaptativamente' poseen más chances de sobrevivir y reproducirse, y por lo tanto tienen también más probabilidades de transmitir sus genes a la siguiente generación.
When pure black hamsters were mated with pure white hamsters, all of the offspring were black. The trait for whiteness would best be described as?
Answer:
Recessive
Explanation:
All of the offsrping were black so that means black was the dominant gene and white was the recessive
At the time when the pure black hamsters were mated so here, the whiteness trait should be called the recessive.
What is recessive?It refers to the allele type that should not be manifested in an individual till both individual copies of the gene should include the particular genotype.
And, all the offspring should be considered as black so here black treated as the dominant gene and white should be considered as the recessive
Hence, the whiteness trait should be called recessive.
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Muscle cells need to quickly convert energy from molecules into a usable form. For this reason, which of the following do muscle cells have in greater number than other types of cell?
A. chromosomes
B. mitochondria
C. nuclei
D. vacuoles
Answer:
La respuesta D. vacuolas
Explanation:
What does it mean when there’s an increase of white blood cells in the body?
A) Nothing, the amount always varies
B) There is no oxygen in the body
C) Your body just finished fighting an infection
D) There is an infection in the body
Answer:
D
Explanation:
White Blood Cells Increase When Someone is Fighting an Infection or Sickness
The amount of gravitational force exerted on an object is its _______.
Answer:
mass
Explanation:
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Answer: Hewo, there! your answer is below
Mass
Mass is a measure of how much matter an object contains.
Explanation:
Mass is a property that an object has no matter where it is located. Weight, on the other hand, depends on the force of gravity acting on that object.
Hope this helps you!!
Have a great day!!
The flooding of fields in winter can affect aquifers without having long term impacts on the height of the water table. Which statements explain why this is possible?
Select the TWO correct answers.
A. In winter, using groundwater to flood fields causes the water table to drop because water is withdrawn from the aquifer.
B. In winter, removing water from the aquifer causes the water table to rise because water covers the areas where rice is grown.
In spring, changes in the level of the river cause the water table to rise because water flows from the river into the aquifer.
C. In spring, removing water from the aquifer causes the water table to drop because water flows from the aquifer to the river.
D. In summer, changes in the level of the river cause the water table to rise because water flows from the river to the aquifer.
The flooding of fields in winter has no long-term effect on the height of the water table because removing water from the underground water - the aquifer causes water to drop and summer melts water into the water table.
Aquifers, Water Tables, Summer, and WinterDuring winter, the flooding of the field traps water from going back into the aquifers and the use of water from them causes the water level to drop.
Due to the melting of snow in summer, the water levels are normalized. Therefore, the correct answers are C and D.
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BIOLOGY QUESTION PLEASE HELP!!
In rabbits, the gene for black fur is dominant over the gene for white fur. How can the appearance of white baby rabbits be explained when the mother has white fur, and the father has black fur?
Answer:
it is going to xx or xy those genes of the father and the father
Which is an example of a scientific theory?
A. On average, larger mammals sleep longer than smaller mammals.
B. If a plant receives pure water, then it will grow more than one that
receives salt water.
C. Organisms evolve over time due to changes in heritable physical
characteristics.
D. If a person takes at least one vitamin per day, then it will reduce a
person's level of tiredness.
HELP PLEASE!
Answer: Organisms evolve over time due to changes in heritable physical characteristics.
Explanation:
There are a few things to look for when distinguishing between a nonscientific theory and a valid scientific theory. One thing to consider is if there are any published literature, experimental studies, and data available to support the theory. Most scientific theories have data and information tied to them. Another factor to examine is who has developed the theory. A scientific theory will always be supported by evidence with large quantities of data and testing. An example of a scientific theory is the theory of evolution, which observes changes in heritable physical traits over time in an organism. A hypothesis might be that all organisms evolve at the same rate.
Organisms evolve over time due to changes in heritable physical characteristics is an example of a scientific theory known as evolution. Thus, option C is correct.
What is evolution?Evolution is the scientific theory that explains that "a change in the characteristics of biological populations over next generations.
According to scientists RNA is the first existing molecule on earth that replicate by itself and the process of evolution lead to advanced forms of life.
These characteristics are easily trasfered from one generation to other generation.
Therefore, Organisms evolve over time due to changes in heritable physical characteristics is an example of a scientific theory known as evolution. Thus, option C is correct.
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What role do dominant and recessive alleles play in determining phenotypes?
Answer:
They determine what everything will look like, by the different combinations of alleles.
true or false
A niche includes just the biotic parts of an environment.
Answer:
False
Explanation:
An organism's niche includes its environment, behaviors, and interactions. It also includes its role within the environment. The environment consists of living and nonliving components.
The bone cell of a goat contains 60 chromosomes.How many chromosomes will be in each daughter cell after mitosis
The bone cell of a goat contains 60 chromosomes, so there will be 60 chromosomes in each daughter cell after mitosis, as mitosis is the cell division that will produce daughter cells with the same genetic contents.
What exactly is mitotic cell division?The cell divides during mitosis, and the daughter cells formed have the same genetic content as the parents, here, two daughter cells are formed, with the bone cell having genetic content same as original bone cell. Because the duplicated chromosomes are separated equally by the spindle fibers without crossing over or recombination, 60 chromosomes will form that is the same number of chromosomes after mitosis.
Hence, the bone cell of a goat contains 60 chromosomes, so there will be 60 chromosomes in each daughter cell after mitosis, as mitosis is the cell division that will produce daughter cells with the same genetic contents.
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An elephant has a long, powerful trunk. According to the ideas of Lamarck, how did the trait of long, powerful trunks develop in elephants?
Answer:
Gradually, as generations of elephants continued to selectively use and develop their trunks.
Explanation:
Jean-Baptiste Lamarck was famous French Naturalist. He was a soldier, a biologist and an academic. He gave an early theory of evolution known as the theory of Lamarckism.
It was Lamarck who first believed that elephants earlier had small trunks. But eventual when there was scarcity of food and water, the elephants stretched out its trunk to reached out for food such as trees and also water. And as a result their offspring inherited long and powerful trunk.
In his theory of Lamarckism, he believed that the species passes on its traits to the offspring which they acquired through their use in their lifetime. In this case, the elephants might have used their trunks in such a way that they became long and strong over time and they passed tis trait to their babies.
What prevents a lake or ocean from freezing solid?
Answer:
The surface layer of the water freezes solid creating a barrier that insulates the ice below so that it keeps a steady temperature usually a few degrees above freezing (32 degrees).
Explanation:
When a pelican gets hot, it opens its bill and flutters the sides of its pouch. This causes water to evaporate, which cools the pelican. What type of adaptation is the movement of the pelican’s pouch?
behavioral adaptation
life-cycle adaptation
physical adaptation
reproductive adaptation
Answer:
Behavioral adaptation
Explanation:
life-cycle adaptation would be like a tadpole growing legs.
physical adaptation would be a change in the animals body like wings for a bat.
reproductive would be beneficial for making offspring like a peacocks bright feathers that attract mates.
Behavioral adaptations are responses to external stimulus like heat.
So behavioral is the best option.
Photosynthesis is a complex set of chemical reactions in which light energy is converted in to______________________ energy.
Answer:
chemical energy
Babies typically double their birth weight in the first year of life.
True
False
9. A gene has the base sequence that starts with: TAG CAT GGC AT
What would be the mRNA base sequence formed during transcription, using the DNA sequence shown above?
Answer:
AUC GUA CCG UT
Explanation:
when you are dealing with mRNA these bases transcribe to each other
guanine= cytosine
adenine= uracil
thymine=adenine
Note:
when you are transcribing from DNA to mRNA remember T=A but A does NOT equal T. A=U in a mRNA sequence
What is the medicine called that helps kill bacteria?
Answer:
Antibiotics....................
pasteurization is not required for which type of egg or egg product
Answer:
whole eggs
Explanation:
i think its whole eggs but there is a guideline that says all egg products must be pasteurized
The role of a pioneer species in primary succession is to change a bare habitat into Abe that is suitable for other organisms. A species that is responsible for primary succession in an ecosystem is most likely able to-
A.)live at high altitudes
B.)migrate during the winter
C.)survive any predator
D.)carry out photosynthesis
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In males, the 4 haploid or diploid cells at the end of Meiosis 2 become 4 sperm cells.