In the excretory system , a waste substance called ______ is filtered out of the blood.
kidneys - renal - urea - urine - water
Answer:
urea
ignore this line
The population of Africa is increasing faster than any other continent. In addition, Africa is experiencing a "youth bulge." What is the MOST likely outcome if these trends continue?
A. There will be a larger workforce in Africa, improving their economies.
B. The economies in Africa will be challenged to support a growing population.
C. Countries in Africa will require greater healthcare resources.
D. Africa will become the leading producer of food and other resources.
Answer:
B. the economies in Africa will be challenged to support a growing population.
Explanation:
Just because Africa is increasing faster than any continent, doesn't mean its improving or going to improve. More children means more healthcare for families which is more expensive. And most of Africa's population are in Stage 1. (Below Poverty, less than $1.10 a day). Most Africans don't make it past 64 years.
treated sewage is free of what contaminants
a. medical
b. nutrient
c. biological
d. all
What did you include in your response?
The series of events that occurred in the endosymbiotic theory are as follows:
Both organelles were free-living prokaryotes ingested by primitive eukaryotic cells.Mitochondria and chloroplasts perform aerobic respiration; the host cell provides organic compounds for ATP production.Eukaryotic cells contain mitochondria and chloroplasts, but these organelles function similar to bacterium, which are prokaryotes.What is the endosymbiotic theory?The endosymbiotic theory is theory that describes how eukaryotic cells arose from simple prokaryotic cells,
In the endosymbiotic theory, simple prokaryotic cells which developed abilities such as using oxygen as electron acceptor as well asthe ability to use carbon to produce food associted in a symbiotic relationship.
One prokaryotoc cell engulfed another prokaryotic cell with which it exists in a symbotic relationship with.
The engulfed cells became the organelles in eukaryotes such as mitochondria and chloroplast.
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Can someone answer this question with proper explanation please?
Answer: 0%
Explanation:
All children have half of their chromosomes, from mom, and half from dad. Because mom is homozygous, each of her children will have at least one dominant trait, which will completely cover the recessive trait form their dad. However the children will still be carriers of this syndrome
how does the cytoplasm of an egg cell adapted to its function
i need the answer to this question so i can pass my class with a 70
Answer:
The cell membrane has become completely permeable.
Explanation:
When substances go in and out of cell the cell is permeable.
There are three ways the movement in and out of cell happens:
Osmosis: particles move from high water potential to low water potential. Diffusion: particles move from high concentration area to low concentration area. Active transport: particles move from low concentration area to high concentration area.The cell situation could be a hypotonic and hypertonic situation when too much water has moved in the cell causing swollen cells.
the are the regions of the auditory pathway of the human brain in which information from both ears is first integrated. group of answer choices
The superior olivary nuclei are the regions of the auditory pathway of the human brain in which information from both ears is first integrated.
The superior olivary nuclei can be described as a region that helps in multiple ways for hearing of sound. One of the main functions of the superior olivary nuclei is to locate from where a certain sound is being produced in the ear.
The superior olivary nuclei are also involved in the integration of sound information from both ears. Sound lateralization is an important function the superior olivary nuclei.
The superior olivary nuclei are present not only in humans but also in other mammals, reptiles and amphibians.
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a child has developed a benign brain tumor in the cerebellum and the floor of the third ventricle. the proper documentation for this type of tumor includes which terminology?
Primary brain cancers occur when normal cells' DNA changes (mutations). The DNA of a cell includes the instructions that inform the cell what to do. The mutations instruct the cells to grow and divide quickly and to live even when healthy cells would die.
What is a benign brain tumor?A benign (non-cancerous) brain tumor is a collection of cells that grows slowly in the brain. Non-cancerous brain tumors often remain in one location and do not spread. It usually does not return if the entire tumor can be safely removed during surgery.
They have the potential to injure and compress portions of the brain, resulting in serious malfunction. Benign brain tumors in a critical part of the brain can be fatal. A benign tumor can become cancerous very rarely.
Note that an overview was given as the complete information wasn't found.
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the free energy released by the blank reactions of blank is stored in blank. the energy released by its hydrolysis to blank and pi drives the blank reactions of blank, which synthesize the complex molecules. also, during hydrolysis in mechanical and transport work, blank is transformed into blank. in these transfers and transformations, some energy is lost as heat. all the reactions of a cell require enzymes, which ensure efficient cell function by binding substrates and blank activation energy, thus speeding up metabolic reactions.
The following paragraph about catabolic reaction can be completed below:
The free energy released by the exergonic reactions of exergonic is stored in exergonic. The energy released by its hydrolysis to exergonic and pi drives the exergonic reactions of exergonic, which synthesize the complex molecules.
Also, during hydrolysis in mechanical and transport work, catabolic pathways is transformed into catabolic pathways.
In these transfers and transformations, some energy is lost as heat.
All the reactions of a cell require enzymes, which ensure efficient cell function by binding substrates and catabolic pathways activation energy, thus speeding up metabolic reactions.
What is meant by catabolic reactions?Catabolic reactions refers to a type of metabolism which involves the breaking down of bigger molecules into smaller molecules.
So therefore, an exergonic reaction can simply be defined as those metabolic activities which occurs in the body by releasing or giving off energy.
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Two types of nucleic acids are DNA and RNA. What are the functions of these two nucleic acids?
A-RNA makes nucleotides, and DNA puts the nucleotides together to make nucleic acids.
B-DNA creates amino acids, and RNA puts the amino acids together to make a protein.
C-DNA contains the code for proteins, and RNA helps make the proteins from amino acids.
D-RNA contains the code for proteins, and DNA helps make the proteins from amino acids.
Two types of nucleic acids are DNA and RNA. The functions of these two nucleic acids are DNA creates amino acids, and RNA puts the amino acids together to make a protein.
DNA is answerable for carrying and transmitting hereditary materials or genetic instructions from parents to offspring. In addition to ensuring that all living things pass on their genetic information, DNA is essential for the synthesis of proteins. on the other hand messenger RNA (mRNA) carries the protein draft from a cell's DNA to its ribosomes, which are the apparatus that drive protein synthesis. Transfer RNA (tRNA) then carries the relevant amino acids into the ribosome for inclusion in the new protein.
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A line of mutated yeast cells, called wee mutants, has no mitochondria. Their name comes from the fact that these cells are very small compared to other yeast cells. Which energy-harvesting processes can wee mutants perform?.
Answer:
glycolysis and fermentation
Explanation:
Hope this helps.
Which of the following is not part of the cell theory?
A. All cells come from other cells.
B. All cells are eukaryotic.
C. All living things are made of one or more cells.
D. Cells are the basic unit of living things.
Answer:
B. All cells of eukaryotic.
Explanation:
Eukaryotic means: An organism with more than 1 cell.
A cell is cannot have multiple cells within it, and if you read the cell theory it doesn´t mention B.
Cual es la funcion principal de la meiosis?
Answer:
La meiosis es el proceso en el que las células se dividen por la mitad para reproducirse y crear células hermanas. Cada una de las células hermanas obtiene una parte de los cromosomas de la célula madre para reproducirse en el futuro.
an______ is all the organisum of the same ____ that live in the same area at the same time.
A population is a group of organisms of the same species that live in the same area at the same time.
What is population?A population in an ecosystem is defined as the group of organisms that makes up a particular species which are found living in a particular area and at a particular time.
Some scientists known as the population ecologists study the following features of the population such as:
Size: This deals with the number if organisms found in a particular area.Density: This deals with the number of individuals divided by the size of the area.Structure of the population.Learn more about population here:
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aegyptopithecus has been found in two sizes, both in skull and canine size, and in canine shape. what might this suggest about their social structure?
This, in the opinion of many paleoanthropologists, supports Aegyptopithecus' status as a primate, ape, and human ancestor.
What characteristics of Proconsul indicate that it is an early ape?The absence of a tail is the main characteristic that distinguishes Proconsul from living apes; other traits that can be considered "ape-like" include its improved grasping abilities, stabilized elbow joint, and facial structure. Like modern-day gibbons and other nonhuman apes, Proconsul could not effortlessly hang from tree branches.
The shape of the nostrils distinguishes catarrhines and platyrrhines. Platyphines have broad, flat nostrils that face sideways, whereas catarrhines have narrow nostrils that face downward. The physical characteristics of primates help to distinguish them from other species.
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How does a cell in a cow use food to move and function?
Answer: Matter movement
Explanation: Large organic molecules or polymers, carbohydrates, fats/lipids, proteins enter into the cow and move through.
What factors describe aquatic ecosystems?
Answer: Light levels, water flow rate, temperature, dissolved oxygen, acidity (pH), salinity and depth.
Explanation: For aquatic ecosystems, these factors include light levels, water flow rate, temperature, dissolved oxygen, acidity (pH), salinity and depth. Light level is an important factor in aquatic ecosystems.
Chromatin from two tissues, skin and liver, was extracted and analyzed near the gene twist. The liver chromatin was found to be more dnase sensitive than the chromatin from skin cells. What might explain this difference?.
The twist is silenced in skin and not liver which is the reason why liver chromatin was found to be more dnase sensitive than the chromatin from skin cells.
What is Gene twist?This is referred to as a transcription factor which provides the instructions in the making of a protein in cells and ensures early development is achieved.
it attaches to certain parts of the DNA and the activity of some genes are controlled. It is silenced in cells such as that of the skin which is why liver chromatin was found to be more dnase sensitive than the chromatin from skin cells.
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The word hyper means "more." What does "natremia" refer to?
what is the purpose of salt in making ice cream in simple words?
Answer:
Salt makes ice colder, so it freezes the cream quicker which allows for the icecream to be created faster.
Explanation:
Salt lowers ice's freezing point, therefore, making it colder. Because of this it also makes water freezing harder-hence why we put it on the roads in the winter.
The map shows the allele frequency of sickled hemoglobin (HbS) and malaria endemicity in Africa.
The best explains the relationship between HbS allele frequency and malaria endemicity in Africa is when an area is malaria free, the HbS allele frequency is between 0 and 2.02. The correct option is a.
What is sickled hemoglobin?Sickled hemoglobin is a genetic disease that changes the shape of hemoglobin cells from a circle to a sickle shape, which reduces their function and it causes hemoglobin disease in the person.
Malaria is caused by the anopheles mosquito. It causes fever and shivering of the body.
Therefore, the correct option is a. When an area is malaria free, the HbS allele frequency is between 0 and 2.02.
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The question is incomplete. Your most probably complete question is given below:
Which statement best explains the relationship between HbS allele frequency and malaria endemicity in Africa?
When an area is malaria free, the HbS allele frequency is between 0 and 2.02.
When an area is holoendemic, the HbS allele frequency is between 0.52 and 4.04.
When an area is malaria free, the HbS allele frequency is between 12.64 and 18.18.
When an area is holoendemic, the HbS allele frequency is between 0 and 0.51.
the shapes of some proteins are dependent on the electrical potential in the surrounding area. predict what might happen to a such a protein if it was near one of the gated protein channels as it opened.
They will change shape in response to binding of their target molecule.
Channel opening is triggered by a specific stimulus such as the voltage or pH difference across the cell membrane. These channel are selective in the type of ions that can pass through its pore. When ion channels are in their open state, they conduct electrical current by allowing specific types of ions to pass through them.
Carrier proteins are proteins that bind to molecules or ions on one side of the membrane and release them on the other. Channel proteins create holes/pores that penetrate the membrane, enabling target molecules or ions to flow through via diffusion without interfering with one another.
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Design a Model
Part A Think of another common object around your house or school that you could use to model a cell. Describe the object. Based on its characteristics, does the object best model an animal cell, a plant cell, or a bacteria cell?
Part B Describe two advantages and two limitations of the model you selected.
The cell is the smallest unit of an organism. Recall that the cell is composed is a self sustaining unit. This implies that the cell has many components that is able to provide for the needs of the cell. The cell is thus depicted as quite a self sufficient unit in itself.
Having said this, the object that is around my school that could be used to model a cell is the motor vehicle. The motor vehicle looks more like the plant cell because of the presence of the body and the windscreen that provides support for the car and protects it from external pressure. The energy for the car to function is provided by the engine of the car were combustion occurs. This is similar to what happens in the mitochondria of the plant cell.
This model can be used to show the various parts of the cell and it also shows the cell as a compete unit. However it falls short in the sense that a car is a nonliving thing and is incapable of cooperating with other units.
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sort the parts of a nucleic acid according to whether each occurs exclusively in dna, exclusively in rna, or in both types of nucleic acid. view available hint(s)
DNA : thymine, guanine
RNA : uracil, ribose
Both : cytosine, phosphate, adenine, guanine
RNA :All living cells contain ribonucleic acid (abbreviated RNA), a nucleic acid with properties similar to those of DNA. However, RNA is typically single-stranded, unlike DNA. Instead of the deoxyribose present in DNA, the backbone of an RNA molecule is made up of alternating phosphate groups and the sugar ribose.
Types of RNAMessenger RNA (mRNA) A polypeptide results from the translation of mRNA.Transfer RNA (tRNA) has an anticodon on one end and can bind an amino acid to the other.Ribosomal RNA (rRNA) The amino acids that the mRNA codes for can bond more easily thanks to ribosomal RNA (rRNA).Micron RNA (miRNA)To know more about phosphate :
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What part in the cell cycle results in identical daughter cells
b) The diagram below shows part of the inner surface of this organ.
i) Name the structures labelled X on the diagram.
Explanation:
where is that diagram labeled x
Describe how a jaw breaker can be used to explain the Life cycle of a Star
Answer: Stars have diffrent layers
During which stage of aerobic cellular respiration is the most ATP synthesized?
Answer:
ets(electron transport system)
Which of these describe a galaxy
Answer:
Explanation:
Option please