Answer:
C. They live for only 120 days
Explanation:
Well, not exactly 120 days but they live for about 100-120 days. red blood cells are also called erythrocytes. Unlike other cells, they do not have a nucleus. The red blood cells circulate through the body for about 100 to 120 days and are eventually recycled. Their main function is to carry oxygen to the different parts of the body.
Answer:
C
Explanation:
Which shows the levels of organizational hierarchy listed from least complex to most complex?
Answer:
That would be organism, species, and then community.
Explanation:
Answer:
Biosphere, community, organism
Explanation:
Which statement best describes the breakdown of food in the digestive system? Carbohydrate digestion starts in the stomach and protein digestion starts in the stomach. Carbohydrate digestion starts in the mouth and protein digestion starts in the stomach. Carbohydrate digestion starts in the esophagus and protein digestion starts in the small intestine. Carbohydrate digestion starts in the small intestine and protein digestion starts in the esophagus.
Answer:
Carbohydrate digestion starts in the mouth and protein digestion starts in the stomach.
Explanation:
Digestion of carbohydrates start at the moth with the help of salivary amylase which is an enzyme that helps breakdown the polysacharrides found in food with carbohydrates.
Protein digestion on the other hand, begins in the stomach and the duodenum. The stomach releases the enzyme called pepsin, which help breakdown the proteins, with the aid of two other enzymes, chymotrypsin and trypsin which are enzymes released by the pancreas.
Answer:
B, Carbohydrate digestion starts in the mouth and protein digestion starts in the stomach.
Explanation:
Question 11 (5 points)
A family of elements that contains the most reactive metals is the___
noble gases
alkaline earth metals
alkali metals
transition elements
Answer:
alkaline earth metals
please help me i neeeeeeeed it
Answer:
The answer is A
Explanation:
The best and most correct answer among the choices provided by the question is A.) 100%. Hope this helps :)
where did the Louis XVL try to get money from
Answer:
Palace of Versailles
Explanation:
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What is a difference between systemic and pulmonary circulation? A. Systemic circulation carries oxygenated blood to the lungs and pulmonary circulation carries deoxygenated blood to the body. B. Systemic circulation carries deoxygenated blood to the lungs and pulmonary circulation carries oxygenated blood to the body. C. Systemic circulation carries deoxygenated blood to the body and pulmonary circulation carries oxygenated blood to the lungs. D. Systemic circulation carries oxygenated blood to the body and pulmonary circulation carries deoxygenated blood to the lungs.
Your answer would be D, Systemic circulation carries oxygenated blood to the body and pulmonary circulation carries deoxygenated blood to the lungs.
These two circulations are part of the circulatory system, with the pulmonary circulation taking deoxygenated blood to the lungs and returning it oxygenated with the oxygen we breathe in, then that oxygenated blood going around the body delivering that oxygen and coming back deoxygenated.
Hope this helped!
In pulmonary circulation, deoxygenated blood is pumped from the heart's right ventricle, while in systemic circulation, oxygenated blood is pumped from the heart's left ventricle. thus option D is correct.
What are pulmonary and systematic circulation?Pulmonary circulation begins with the right ventricle sending deoxygenated blood to the lungs, where it is oxygenated before returning to the heart in the left atrium. while in the systemic circulation, oxygenated blood is pumped from the heart's left ventricle.
The pulmonary circulation's major purpose is to exchange gases (CO2 and O2) between the blood and the air.
The vascular system that distributes blood from the left ventricle to all of the body's tissues is known as systemic circulation.
The systemic circulation is in charge of maintaining a consistent blood flow via the capillaries in order to facilitate nutrient diffusion.
Finally, deoxygenated blood is pumped from the right ventricle of the heart in pulmonary circulation, whereas oxygenated blood is pushed from the left ventricle in the systemic circulation.
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How does competition increase stability in an ecosystem?
A a decreases biodiversity
B it keeps population balanced
C it causes cyclical disturbances
D it removes keystone species
Answer:
b
Explanation:
so that the habitat doesnt get overcrowded
The competition increase stability in an ecosystem by keeping population Balanced.
Explanation:
There is increase in competition this will in turn deals with stability in ecosystem. Because this creates continuous food chain where a larger animal will eat the smaller one and this cyclical chain keeps in check. The food chains creates complexities in the biodiversity this again is compensated with increase in population. With a lot more increase in species again the food chain demands the cyclical procedure. This is how in our biodiversity the stability in the organism is maintained.
Which is a requirement for natural selection to occur?
heritable variations for some traits
the ability of an organism to improve a trait during its lifetime
equal probability of survival for all offspring
fewer offspring than the environment can support
Answer:
A.Explanation:
HERITABLE VARIATIONS FOR SOME TRAITS.Some birds look for food near cattle and other livestock. The movement of
the cattle churns up the ground, making insects available to the birds. The
cattle appear to be unaffected by the presence of the birds. What kind of
relationship exists between the birds and the cattle?
O
A. Parasitism
O
B. Commensalism
O
C. Predation
O
D. Mutualism
I think the answer is B. Commensalism. The cows are unaffected by the birds taking advantage of their stirring up the ground, while the birds benefit. Thus, this is not parasitism, while one organism benefits while the other is harmed, or preparation, where one organism kills the other for food, or mutualism, where both organisms benefit.
The answer is B. Commensalism
Hope this helps!
Commensalism relationship exists between the birds and the cattle.
In commensalism one organism is benefitted and other remain unaffected.What is commensalism?Commensalism is a relationship between two organisms in which one benefits from the other without causing harm to it. The commensal organism obtains food, shelter, locomotion or support.What are the relationship exist in nature?There are five main symbiotic relationships:
Mutualism,Commensalism,Predation, Parasitism,Competition.Hence, B option is correct.
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What is the purpose of the part of the female reproductive system highlighted below ?
Answer:
A collecting sperm.
Explanation:
its cannot transport eggs, nor does it develope a fetus ,the fetus is delveoped in the womb while eggs are stored in the ovaries
The purpose of the part of the female reproductive system highlighted is option A. Collecting sperm.
What are the functions of Uterus?The uterus is an organ of the female reproductive system. It’s shaped like an upside-down pear and has thick walls. The main function of the uterus is to house and nourish a fetus until it’s ready for birth.If conception occurs, the fertilized egg (the embryo) burrows into the endometrium from which the maternal portion of the placenta, the decidua basalis, will develop.As pregnancy progresses, the uterus grows and the muscular walls become thinner, like a balloon being blown up, to accommodate the developing fetus and the protective amniotic fluid produced first by the mother and by the urine and lung secretions of the baby.During pregnancy, the muscular layer of the uterus begins contracting on and off in preparation for childbirth.Hence, option A is the answer.
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Which macromolecule forms a double layer as the primary structure of cell membranes?
A.fats
B.oils
C.phospholipids
D.steroids
Phospholipids form a double layer that acts as the primary structure of cell membranes. They align naturally in a bilayer due to their unique structure, where one part is attracted to water while the other part is repelled.
Explanation:The macromolecule that forms a double layer as the primary structure of cell membranes is phospholipids. These are a type of fat molecule that has a phosphate group in its structure. They have a unique property, where one part of the molecule is attracted to water (hydrophilic) and another part is repelled by water (hydrophobic). In a water-based environment, phospholipids naturally arrange themselves in a double layer, or bilayer, with their hydrophilic phosphate heads facing the water and their hydrophobic fatty acid tails tucked away in the middle. This double layer forms a barrier that separates the inside of a cell from its surrounding environment, hence forming the primary structure of cell membranes.
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Which structure is the cytoplasm?
Answer:
It is basically the background of the cell where everything sits.
What hypothesis did Miller-Urey test in their experiment?
Answer:
Oparin's hypothesis
Explanation:
In which type of exercise would fat reserves be used to create ATP
2.) Would a plant grow better in a room painted blue or in a room painted green? Explain your answer.
Answer:
A blue room
Explanation:
Green light is the least effective for plants because they are themselves green due to the pigment Chlorophyll.. Blue light helps encourage vegetative leaf growth, and red light encourages flowers. this happens because the amount of blue, red and far red spectrum of light that reaches the planet changes with the seasons. As days start to get longer, more blue spectrum light reaches the surface of the earth. This initiates a vegetative growing stage for most plants leading into the spring and early summer. As the days start to grow shorter, and more of the red and far red spectrum reaches the surface, it leads into the late summer and fall reproductive season.
Which the following best compares the functions of the ovaries in the uterus?
Answer:
what are the answer choices ?
Explanation:
What would most likely be included in the “Analysis” section of a lab report?
Hello There!
In a science lab report, you would usually include a discussion of any errors in the experimental data.
Give an example of how a society can have an effect on scientific research.
Answer: generating new knowledge, improving education and increasing our quality of life
Explanation:
Cure for many kinds of cancer is attained through scientific research.
How a society can have an effect on scientific research?In medicine, we have come a long way. For almost all medical conditions we have a cure nowadays.Technologically we can easily compare the life we used to live 5 years before and the life we are living at present.Everything came out as a result of successful scientific research.Scientific research plays a vital role in the improvement of human lifestyle.To learn more about scientific research refer to:
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6. Which statement about seagulls and sea stars is true?
A Seagulls are the prey of sea stars.
B Sea stars are the prey of seagulls.
O
C
Sea stars are the predators of seagulls.
D Sea stars are the hosts of seagulls.
Answer:
B. Sea stars are the prey of seagulls
Explanation:
Seagulls eat sea stars, meaning that sea stars are their prey (the organism that is eaten).
Predator: an organism that eats (preys on) another organism
Prey: an organism that is eaten by another organism (creatures can be both predator and prey. For example, a rabbit is a predator to grass, while they are prey to foxes)
Host: An organism that is fed on by a parasite. Think of a dog with a tick. The dog is the host, the tick is the parasite.
Incorrect answers (and why):
A. Sea stars do not eat seagulls
C. If a sea star was a predator to a seagull, that would mean that they eat seagulls. They do not.
D. A host is an organism that a parasite preys on. Not only are sea stars not parasites, but they definitely do not prey on seagulls.
I hope this helps! :)
The product of -2 and a number is at most 10.
Find the possible numbers.
Ons-5
On>-5
On<-5
AVN
on2-5
| |
Answer:
n > -5
Explanation:
Start with -2n < 10. Then you isolate the variable to end up with the above answer. This is so because WHENEVER you divide or multiply by a negative, you reverse the inequality sign.
I am joyous to assist you anytime.
Which of these is one of the nitrogenous bases in DNA?
Choose the best explanation of the difference between evolution and natural selection.
4 points
What causes an ionic bond?
Answer:
A positive ion is attracted to a negative ion
Explanation:
Answer:
when the valence of one atom, combined with another atoms valence
Explanation:
atoms want a full outer circle in there electron cloud, which is eight. so if two atoms have less than eight they bond to combine there outer electrons.
A group of plant cells was exposed to radiation, which damaged the chloroplasts and caused them to lose function. If the mitochondria were unharmed, what would happen to the overall function of the plant cells?
A.
The cells would not be able to make food, but would be able to release energy from biomolecules.
B.
The cells would not be able to replicate DNA, but would be able to break down waste.
C.
The cells would not be able to break down waste, but would be able to replicate DNA.
D.
The cells would not be able to release energy from biomolecules, but would be able to make food.
Answer:
Its A
Explanation:
Oogenesis ultimately results in the production of how many cell(s).
Answer:
one cell
Explanation:
Oogenesis takes place in the outermost layers of the ovaries, ultimately resulting in the production of one cell.
Answer:
4 cells
Explanation:
Oogenesis ultimately results in the production of 4 cells.
Hope this helps!
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Can nonrenewable resources be used sustainably?
A. Yes, nonrenewable resources are always beneficial for the environment
B. No, there are only negative effects of using nonrenewable resources
C. No, there's a finite amount of nonrenewable resources
D. Yes, as long as use doesn't exceed availability
is the correct answer
D. Yes, as long as use doesn't exceed availability
Answer:
C
Explanation:
we know non renewable resources once used up can't be replenished, the question of can it be used sustainably certainly does not present a good picture of its use. It is certainly more difficult to replace such resources.
D. Yes, as long as use doesn't exceed availability.
Nonrenewable resources, such as fossil fuels (coal, oil, natural gas) and minerals (like metals), are finite in nature and cannot be replenished over short timescales. However, they can be used sustainably if their extraction and consumption rate do not exceed their natural rate of formation or replenishment over geological timeframes.
Option D is the correct statement because it highlights the possibility of using nonrenewable resources sustainably by ensuring that their usage does not deplete them faster than they can naturally be replaced. Sustainable use involves managing the extraction and consumption of nonrenewable resources in a way that considers their finite nature, seeks efficiency in utilization, and promotes the development and adoption of alternative, renewable, or more sustainable energy and material sources.
On the other hand, options A and B are incorrect. Nonrenewable resources can have both positive and negative effects depending on their usage and management. While they have been essential in driving modern industrial development and economic growth, their use is associated with environmental impacts like greenhouse gas emissions, air and water pollution, habitat destruction, and climate change.
Option C is partly true as nonrenewable resources are indeed finite, and their quantities are limited. However, just because they are finite doesn't mean they cannot be used sustainably. Sustainable use involves making informed decisions about their utilization, maximizing efficiency, and exploring alternatives to ensure a balance between meeting current needs and conserving resources for future generations.
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Which statement best explains why the development of a new area of science can lead to changes in a theory?
A. A new area of science attracts new scientists who study old theories for flaws.
B. A new area of science promotes experimentation from a different point of view.
C. A new area of science allows old theories to be reworded using new terminology.
D. A new area of science encourages scientists to replace old theories with modern ones.
The statement that best explains why the development of a new area of science can lead to changes in a theory is a new area of science promotes experimentation from a different point of view (Option B).
Scientific knowledge, i.e., knowledge of the real world obtained by using the scientific method, allows us to obtain empirical evidence and raise new questions to explain new observations/facts.Thus, empirical evidence can in turn be used to develop new hypotheses in order to explain new observations.Subsequently, hypotheses can be tested (either confirmed or rejected) by experimental and/or observational procedures. Finally, when new knowledge is big enough (well sustained) in itself, it allows us to develop new theories based on a body of empirical knowledge and it can be used in different scientific fields.In conclusion, the statement that best explains why the development of a new area of science can lead to changes in a theory is a new area of science promotes experimentation from a different point of view (Option B is correct).
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What information does a food pyramid describe that a food web does not?
Answer:
“Food chain” and “food web” relate to the ecological cycle of life in which one species eats another to survive. While a “food pyramid” is used to describe the ideal balanced diet for a human being.
Explanation:
why nostoc is called blue green algae?
Answer:
Explanation:
They contain the photosynthetic pigments photo cyanin (blue) & chlorophyll (green)
Nostoc is called blue-green algae because it belongs to the group of cyanobacteria, often known as 'blue-green algae'. These organisms are classified under Phylum Cyanobacteria and can be found in various habitats like soil, ponds, and wet environments.
Cells are surrounded and protected by
Answer:
The phospholipid layer surrounds the cell and protects it from the outside environment.
Explanation:
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