Answer:
Dramatic evolution within human genome may have been caused by malaria parasite. A genetic mutation that protects people from a common form of malaria spread like wildfire in sub-Saharan Africa about 42,000 years ago, according to a new study.
People develop sickle-cell disease, a condition in which the red blood cells are abnormally shaped, if they inherit two faulty copies of the gene for the oxygen-carrying protein haemoglobin. The faulty gene persists because even carrying one copy of it confers some resistance to malaria.05-May-2011
Explanation:
An evolutionary force, called balancing selection, appears to be responsible for maintaining defects in our DNA associated with diseases, such as sickle cell anemia, because the mutation's damaging effects might be offset — in a biological way of thinking — by its potential benefits.
fr.ee points for the hoomies
also plz answer my question abt stem cells ;,)
Answer:
STEM CELLS
They serve as a repair system for the body.
Fire reproduces if a spark from the original fire as it lands on another object. is it evidence or reasoning?
Answer:
reasoning
Explanation:
Fire reproduces if a spark from the original fire as it lands on another object is reasoning.
What is the reasoning?Reasoning is the ability or process of thinking and process thing in a logical and factual way. The use of a reason for a situation is reasoning and it is a sensible way of thinking.
Fire needs oxygen to spark up and fire up. When there are good ventilation and fire breaks up and burns with full light and heat. If the spark of fire burns other objects, it also burned up due to fire. This is the proper and factual reason for burning a fire.
Evidence is when given some evidence for the given statement but in the statement, the evidence is not given, just a reason is given for the burning of fire.
Thus, the given statement about fire is reasoning.
To learn more about reasoning, refer to the link:
https://brainly.com/question/11478756
#SPJ2
Polymers are formed via dehydration reactions by molecules. Which of the following best describes a dehydration reaction?
Assembling molecules in either carbonyl or carboxyl functional groups
Assembling molecules in either hydroxyl or carboxyl functional groups
Dissembling molecules in carboxyl functional groups
Dissembling molecules in hydroxyl functional groups
Answer:
Assembling molecules in either hydroxyl or carboxyl functional groups
Explanation:
Polymers are formed via dehydration reactions by molecules. ... For this a dehydration reaction first off is the assembling of monomers when water is lost. And for dehydration reactions molecules that contain hydroxyl or carboxyl as functional groups.
What is the independent variable in the experiment?
A. growth rate of plants
B. amount of light each terrarium is exposed to
In your own words, what is the definition for Triple X Syndrome?
Answer:
Triple X Syndrome happens only in females. It is when a female recieves an extra X chromosome, so instead of having an XX chromosome, a person with Triple X Syndrome would have XXX.
pls answer this question i think easy
Answer:c
Explanation:it must be c if im wrong then sue me!
Answer:
B. Food is broken into simpler molecules.
Explanation:
these small molecules are; proteins, amino acids, glucose, e.t.c
What factors are included in the classification scheme of climates?
Temperature, pressure, and vegetation
Pressure, latitude, and longitude
Vegetation, precipitation, and temperature
Precipitation, topography, and elevation
vegetation, precipitation and temperature
i need this answered asap!! What's the source of thermal energy and how energy flows throughout the layers of the earth. (Hint: think of the cause of the convection currents)
I hope this pic will help you a lot.....
HAVE A GREAT DAY .....
Please help me my assignment is due in 30 minutes
Answer:
The answer is plane
Explanation:
This should be in mathematics not bio
Carbohydrates info
A. AKA:
B. Composed of:
C. Monomer:
D. Polymer:
E. Functions:
What holds the hydrogen
atoms to the
oxygen atom?
Answer:Covalent bonds
Explanation:
will mark Brainliest!!!!!! To corroborate information is to?
find evidence that opposes a scientific position.
find evidence that supports a scientific position.
find evidence that proves a scientific position.
find evidence that disproves a scientific position.
The most correct option as to what corroborating information means would be to find evidence that supports a scientific position.
Corroborate is an English word that means 'to agree with' or 'give credence to'.
Hence:
Finding evidence that opposes a scientific position is a wrong option because that is the complete opposite of what corroborate means. Finding evidence that approves a scientific position is also a wrong option because corroborating a statement does not necessarily make the statement to be scientifically correct.Finding evidence that disproves a scientific position is also incorrect. Corroborate neither translates to approve nor disprove,Therefore, the correct option that clearly explains what corroborate means in the context of science is to find evidence that supports a scientific position.
More on corroboration here: https://brainly.com/question/17392648
Sustainable practices can help us protect the environment while still meeting our basic needs. O True O False
Answer:
True
Explanation:
definition of sustainable practices is "practices we develop to protect the environment.
The statement "Sustainable practices can help us protect the environment while still meeting our basic needs" is definitely true.
What is the Environment?Anything which is present in the surrounding of a living organism is called its environment. The term "environment" was first given by Carlyle.
Sustainable practices are those measures that should be taken in order to protect our environment from harmful and abnormal behaviors, activities, compounds, etc. Sustainability is the approach that helps in the protection of the environment with the present needs without affecting the future.
It includes all those processes that are employed in order to maintain the qualities that are valued in the physical environment. For example, boycott products that endanger wildlife, pay attention to labels, be water-wise, drive less, drive green, green your home, etc.
Therefore, the statement "Sustainable practices can help us protect the environment while still meeting our basic needs" is definitely true.
To learn more about Sustainable practices, refer to the link:
https://brainly.com/question/24514288
#SPJ2
easy biology question below first correct answer gets brainliest
Answer:
It's probably c?
Explanation:
why us a spirogyra called a thallus ? which types of nutrition does it show ?why?
Explanation:
a plant body that is not differentiated into stem and leaves and lacks true roots and a vascular system. hence spirogyra called a thallus.
Spirogyra is an example of Green algae , thus it prepare its own food by process of photosynthesis in presence of sunlight and chlorophyll.So, its nutrition type is Autorophic.
Which of the following professionals would be most likely to raise commercial nut-bearing trees?
greenskeeper
orchardist
florist
landscaper
Helppp
Answer:
florist professional would be most likely to raise commercial nut bearing trees.
Answer: orchardist
Explanation:
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the control variables are...
Answer:
it is the amount of soil, sunlight, and the music they listen to
control variables are the elements that are always constant and not changed throughout the experiment.
When cells are damaged, they release proteins called ____ ?
inflammatory chemical signals that evoke local vasodilation
A molecule will become an ion when which of the following happens?
Select all that apply The characteristics that define passive immunity include ______. Multiple select question. lag time before protection is available lack of antibody production to pathogen short-term effectiveness immediate onset of protection lack of memory cells long-term effectiveness
Passive Immunity is process of providing IgG antibodies to protect against infection.
It generates antibodies which provides protection against the infection.
This is short lived protection which can last to several months but can provide immediate protection.
Therefore the correct answer is Short term effectiveness immediate onset.
Learn more at https://brainly.com/question/24377625
Besides antibodies _________ are made after an active immune response.
1 point
Macrophage
Complement proteins
Antigen
Memory cells
Answer:
Memory cells
Explanation:
Active immunity is defined as immunity to a pathogen that occurs following exposure to said pathogen. When the body is exposed to a novel disease agent, B cells, a type of white blood cell, create antibodies that assist in destroying or neutralizing the disease agent.
During DNA replication, when the mRNA molecule is made by complementary base pairing, the percentage of adenine bases would be equal to which of the following bases in a RNA molecule?
Adenine
Cytosine
Guanine
Uracil
Answer:
I think the answer is uracil because it has the same percentage as thymine in RNA which is 30% and thymine has the same percentage as adenine.
I hope this helps
Fill in the blank;
After complete oxidation of a glucose molecules ________ no. of ATP molecules are formed. plz answer the question plz don't spam. and get 9 points
Answer:
38
Explanation:
After complete oxidation of a glucose molecules, 38 number of ATP molecules are formed.
What was the experimental variable we tested in the lodine Clock Reaction?
Answer:Experiment 1084-04: lodine Clock Reaction Purpose Determine the rate law for an iodine clock reaction and study the influence of st on that reaction abruptly that it can be as startling as the sudden sound of an alarm clock, hence the clock reaction Background Information chemical equations can be written for chemical reactions, only some will proceed while others do not. Among the ones that do proceed some reactions occur as soon as reactants are mixed, while others occur over minutes, hours, or n over several years. What are the controlling in predicting if a reaction will take place and the speed at which it will? Thermodynamics can answer the question, "Will the reaction take place?" Once the reaction is capable of proceeding kinetics can answer the other question, "How fast You will study the rate of the reduction of potassium persulfate, KoS Os, with sodium iodide, Nal. The net ionic equation for the reaction is eve The rate law for this reaction is in the form of And you will need to determine the reaction orders a and b, as well as the rate constant, k. Keep in mind that exponents can not be determined by jus looking at the chemical equation the reaction will take place? The rate of a reaction is defined as the increase in molar concentration of product of a reaction per unit time or the decrease in molar concentration of reectant per unit time. The usual unit for the rate is moles per liter per sec (mol/L s or M/s). Experimentally, it has been found that a reaction rate depends on the concentrations of the reactants. Usually a higher reactant concentration increases chance of collision among the reactants per unit time causing a faster reaction rate. An equation describing the relationship between the reaction rate and the concentration of the reactants You will need a way to determine how much of the reactants were spent over the given time period. Preferably, the concentrations of the reactants should not change too much; therefore the reaction rate can be represented by the initial concentrations of reactants (the initial-rate method). In this experiment, we will couple another reaction that consumes the product, 12 very quickly. The new reaction is the reduction of is called a rate law. For the elementary reaction Note that l2, which was produced in reaction (1) is consumed as fast as it is produced by reaction (2) to regenerate two l. i.e. [门is kept constant. By keeping [S203-9 much smaller than the initial concentration of S,0, we can assure [S20,1 is also kept nearly constant when S203 is completely consumed. At this point, the 12 is no longer eliminated by the reaction and starts to accumulate. This point is signaled by sudden appearance of the dark color from the interaction of l2 with starch indicator. We can measure the time elapsed till the color appears Rate k [AIB] The proportionality constant, k, is called the ate constant in the relationship between the rate nd concentrations. The rate constant has a fixed alue as long as the reaction temperature is held nstant. The exponents, a and b, are called the action order, and are frequently, but not always, egers. More importantly, they must be termined experimentally In this experiment you will determine the rate an iodine clock reaction, and study the effects of perature and a catalyst to the reaction rate ugh there are several versions of an iodine k reaction, all of them share a common feature: completion of the reaction is signaled by the en appearance of a dark purple color. This is characteristic of the interaction between cular iodine and starch. When the reaction is ed out correctly, this color will appear so According to the reaction stoichiometries of reactions (1) and (2), two molecules of S203 are required to counteract the consumption of one molecule of S20a2. Since S2032 would have been completely consumed when the dark purple color appeared, the Δ[SO ] should be % of the initial concentration of S203 15-08-2] = ½ initial [S,03-21
plzzzzzzzz help............
Answer:
A=resists the turgor pressure of the cell
C=controls the activities of the cell
B=site of chemical reactions of the cell including synthesis of proteins
Names
Cell Wall
Nucleus
Cytoplasm
Explanation:
Good luck hope this helps!
Write the name of the forces A and B in the diagram.
Answer:
is that a line segment
ASAP
A ______ is a stack of _______ that provides the chloroplasts with increased surface area.
A. granum, thylakoid
B. thylakoid, granum
C. thylakoid, chlorophyll
D. granum, chlorophyll
A thylakoid is a stack of chlorophyll that provides the chloroplasts with increased surface area (Option C).
What is a chloroplast?A chloroplast is an organelle used by plant cells to generate carbohydrates by means of photosynthesis.
The chloroplasts contain thylakoid sacs composed of chlorophyll whose function is to capt sunlight.
In conclusion, a thylakoid contain chlorophyll for the chloroplasts (Option C).
Learn more about photosynthesis here:
https://brainly.com/question/19160081
#SPJ1
¿Qué opinas sobre la problemática del agua en el Perú y el mundo? Cómo ciudadano responsable ¿Qué acciones estas realizando para valorar este recurso?
El agua es un elemento relativamente escaso y por lo tanto debe ser cuidadosamente utilizado. En América Latina la distribución de las precipitaciones hace que la disponibilidad de este recurso sea desigual dentro de la región, siendo por lo tanto especialmente importante cuidarlo a fin de evitar el agravamiento de la escasez de agua potable.
El agua es fundamental para la vida ya que este elemento cumple muchas funciones dentro de los sistemas biológicos las cuales incluyen, entre otras:es un sustrato imprescindible de muchas reacciones químicas que se producen dentro de la célulaayuda a la digestión de alimentosmantiene la temperatura corporal dentro del rango aceptable para la vida, etc.El agua potable (apta para consumo) es también fundamental para evitar la aparición y propagación de enfermedades tales como diarrea, cólera, fiebre tifoidea, poliomielitis, etc.De acuerdo al Informe Anual del Servicio de Aguas de Lima, aproximadamente el 93% de la población peruana posee servicio de agua potable.América Latina posee aproximadamente el 25-30% de los recursos hídricos del planeta; sin embargo, su distribución dentro de la región es desigual, con áreas totalmente desertificadas y otras que actualmente sufren inundaciones periódicas. Esta situación se encuentra agravada por las consecuencias del cambio climático, las cuales generan una mayor inestabilidad en la distribución y estacionalidad de las precipitaciones.El cuidado de la cantidad y calidad del agua disponible es fundamental para mantener la biodiversidad de las especies alrededor del planeta y asegurar nuestra salud, como así también para garantizar la vida de las generaciones venideras.La ONU (Organización de Naciones Unidas) posee un programa cuyo objetivo principal es reforzar la coordinación entre diferentes países y así lograr el acceso generalizado de las poblaciones al agua potable, como así también lograr su uso responsable.Algunos tips útiles relacionados al cuidado del agua son:Cerrar la canilla al lavar utensilios de cocinaEvitar la pérdida constante de agua en la grifería del hogarEvitar el uso excesivo de agua al ducharseCerrar la canilla al lavarse los dientesAprende más sobre este tema en:
https://brainly.com/question/16830680?referrer=searchResults
ASAP
Which of the following means 'Dehydrated'?
A. Too much water
B. Too little acid
C. Too much acid
D. Too little water
Answer:
D, too little water
What is the dependent variable??
