For a sandy soil farmer should use drip irrigation method over surface irrigation.
Sandy soils have a low water storage capacity and a high infiltration rate. Therefore they need frequent but small irrigation methods, drip irrigation is most suitable method than surface irrigation.
In other irrigation methods such as Surface irrigation, Flood irrigation, Furrow irrigation water is discharged in quite large amounts but the soil lost it due to the high infiltration rate.
Therefore, for a sandy soil farmer should use drip irrigation method over surface irrigation.
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One parent has the blood type A and the other blood type B. What are the genotypes of the parents if they produce children with only blood type AB?
Human blood type is determined by co-dominant alleles. An allele is one of several different forms of genetic information that is present in our DNA at a specific location on a specific chromosome. There are three different alleles for human blood type, known as IA, IB, and i. For simplicity, we can call these alleles A (for IA), B (for IB), and O (for i).
Each of us has two ABO blood type alleles, because we each inherit one blood type allele from our biological mother and one from our biological father. A description of the pair of alleles in our DNA is called the genotype. Since there are three different alleles, there are a total of six different genotypes at the human ABO genetic locus. The different possible genotypes are AA, AO, BB, BO, AB, and OO.
How are blood types related to the six genotypes?
A blood test is used to determine whether the A and/or B characteristics are present in a blood sample. It is not possible to determine the exact genotype from a blood test result of either type A or type B. If someone has blood type A, they must have at least one copy of the A allele, but they could have two copies. Their genotype is either AA or AO. Similarly, someone who is blood type B could have a genotype of either BB or BO.
A blood test of either type AB or type O is more informative. Someone with blood type AB must have both the A and B alleles. The genotype must be AB. Someone with blood type O has neither the A nor the B allele. The genotype must be OO.
How are ABO alleles inherited by our children?
Each biological parent donates one of their two ABO alleles to their child. A mother who is blood type O can only pass an O allele to her son or daughter. A father who is blood type AB could pass either an A or a B allele to his son or daughter. This couple could have children of either blood type A (O from mother and A from father) or blood type B (O from mother and B from father).
Since there are 4 different maternal blood types and 4 different paternal blood types possible, there are 16 differnt combinations to consider when predicting the blood type of children. In the tables below, all 16 possible combinations are shown. If you know the blood type of the mother and father, the possible blood types for their children can be found.
What about the Rh factor? Can a father of blood type A+ have a child who is blood type A-?
The Rh factor genetic information is also inherited from our parents, but it is inherited independently of the ABO blood type alleles. There are 2 different alleles for the Rh factor known as Rh+ and Rh-. Someone who is "Rh positive" or "Rh+" has at least one Rh+ allele, but could have two. Their genotype could be either Rh+/Rh+ or Rh+/Rh-. Someone who Rh- has a genotype of Rh-/Rh-.
Just like the ABO alleles, each biological parent donates one of their two Rh alleles to their child. A mother who is Rh- can only pass an Rh- allele to her son or daughter. A father who is Rh+ could pass either an Rh+ or Rh- allele to his son or daughter. This couple could have Rh+ children (Rh- from mother and Rh+ from father) or Rh- children (Rh- from mother and Rh- from father).
9. Natural selection explains how ______
change as their environments
Answer:
Organisms
Explanation:
Natural selection is when organisms adapt to their environment due to "survival of the fittest".
Explain why parallax was a problem in proving the heliocentric model of the solar system.
Copernicus himself asserted that the absence of parallax meant that the stars were far beyond the planets. The failure of heliocentrists to detect it proved nothing, whereas a successful detection would be strong evidence for heliocentrism.
What is heliocentric model?The astronomical model in which the Earth as well as planets revolve around the Sun at the center of the universe is known as heliocentrism. Historically, heliocentrism was opposition to geocentrism, which centered on the Earth.
Galileo wanted to believe that his new invention, the astronomical telescope, could assist him in proving that the Sun was the center of our solar system and that Earth was only one of many planets orbiting our star.
Copernicus himself claimed that the lack of parallax indicated that the stars were far beyond the planets.
Failure to detect it by heliocentrists proved nothing, whereas successful detection would be strong evidence for heliocentrism.
Thus, parallax was a problem in proving the heliocentric model of the solar system.
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How does leaf structure allow for exchange of gases (O2 and CO2). Select 3 options.
Stomata (pores) let gases pass in and out.
Leaf is flat and thin = large surface area
The leaf has got Chloroplasts.
The Spongy Mesophyll layer has lots of space for gases to diffuse.
Answer:
Explanation:
Gas exchange
When a plant is carrying out photosynthesis carbon dioxide needs to move from the air into the leaf. It does this by diffusing through small pores called stomata. At the same time oxygen moves out of the leaf through the stomata. This movement of gases in opposite directions is called gas exchange.
What is an advantage of a wind energy?
A. The supply of wind for use as a fuel will never run out.
B. The cost of maintaining wind farms is high for the energy generated.
C. Areas with constant winds are needed for the placement of the wind turbines.
D. Large acres of land are needed for the placement of large numbers of turbines.
Why does being hydrophobic make plastic more of a pollution problem
Which of the following describes the relationship between structure and function? The tails on sperm cells help them swim to the egg cell. The heart pumps blood through the body. The skin is made of many different layers
Answer:
Function of the heart pumps blood through the body. So it is the answer.
Explanation:
The half-life of carbon-14 is 5370 years. The carbon-14 levels in a fossil indicate that 6 half-lives have passed. How old is the fossil?
PLEASE ANSWER FAST!!!!!!!
75,200 years
35,000 years
32,220 years
50,000 years
What are some Characteristics of a frog after metamorphosis
Answer:
its leg are developed-------------------------------
Imagine there was no tilt to the earths axis and earths orbit was circular
Answer:
If the Earth was not tilted on its axis, there would be no seasons. And humanity would suffer.
Explanation:
When a Mars-size object collided with Earth 4.5 billion years ago, it knocked off a chunk that would become the moon. It also tilted Earth sideways a bit, so that our planet now orbits the sun on a slant.
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Brain-List?
What remind’s you of the ribosomes in a cell???
Plz help due today!!
Answer:
i imagine them as peopel in a big city, or animals in the wild with predators that are hungry, the cell uses the ribosomes for food and to heal the cell with energy.
Explanation:
Please help !! For 10 points
Hypothesis: If the amount of protein is calculated in three different lipid levels of milk, then whole milk will have the highest level of protein. What is the independent variable in this experiment? Type of protein Amount of protein Amount of milk Type of milk
Answer:
Type of milk
Explanation:
Independent variable is the variable that the experimenter changes or manipulates in an experiment. It is the variable that causes the dependent variable to change.
In this experiment, the hypothesis, which shows the relationship between the independent and dependent variable is stated as follows: IF the amount of protein is calculated in three different lipid levels of milk, THEN whole milk will have the highest level of protein. This shows that the amount of protein is dependent on the TYPE OF MILK used, which is the independent variable.
PLEASE HELP !!!! I give lots of points !!!!
If a person is injured and has type AB blood, what type(s) of blood would the doctor be able to give
them in order to keep them alive?
Answer:
They can receive type A, type B, type AB, or type O.
What helps allows plants to bring water up from the roots to the top of the plant?
a. polarity.
b. capillary action.
c. absorption.
d. low specific heat.
When we talk about soil depletion, which soil horizon is affected?
Answer:
surface horizon (A)
Explanation:
Energy and mass is the square of its speed. True or false
Answer:
I think it's "False" cause they haved they're own moved
What is plant tissue culture.Please answer.
Answer:
Plant tissue culture is a collection of techniques used to maintain or grow plant cells, tissues or organs under sterile conditions on a nutrient culture medium of known composition. It is widely used to produce clones of a plant in a method known as micropropagation.
how effective are vaccines
Answer:pretty effective helps your body get preapeared when you get attacked by the real thing
Explanation:
Sequence the steps in gene sequencing by writing the steps in order.
Answer:
It consists of two major steps: transcription and translation.
Explanation:
Together, transcription and translation are known as gene expression. During the process of transcription, the information stored in a gene's DNA is transferred to a similar molecule called RNA (ribonucleic acid) in the cell nucleus.
The mother determines the sex of the child approximately 50% of the time
True or False
Answer:
False
Explanation:
The husband usally is more Is more decisive about having sex
Describe the chemical composition of bone.
please answer in your own words
The mass of an object multiplied be it's speed is?
Answer:
momentum
Explanation:
HELP. Asap! Answer question in photo
The diagram shows light- and dark-colored beetles that live on a tree.
Predator and Prey Relationship
Which result is most likely to occur to the beetle population due to predation over time?
Answer
F. The number of light-colored beetles in the population will increase
G There will be more dark-colored beetles than light-colored beetles
H The number of light-colored beetles will decrease
J
The dark-colored beetles will move to a different type of tree.
Answer:
F
Explanation:
I believe it F since there are far more light colored and the tree is a light color making them a bit camouflage but for black it will decrease since it's a different color from a tree making it easy to see
Based on the information provided, it is most likely that the number of light-colored beetles in the population will decrease over time due to predation, so the answer is option H
What is Predator and Prey Relationship?The light-colored beetles are more visible to predators, and therefore, are more likely to be eaten than the dark-colored beetles. As a result, over time, the proportion of dark-colored beetles in the population may increase, while the proportion of light-colored beetles decreases.
This type of natural selection, in which individuals with certain traits are more likely to survive and reproduce than others, is known as directional selection. It can result in changes to the characteristics of a population over time.
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What are the two main uses of Coal and Oil and Natural Gas fossil fuel:
help me help me help me
Answer:
the 2 main uses of coal and oil are
Explanation:
Answer:
Most of our energy comes from three fossil fuels: Oil, which we use to produce gasoline and other refined liquid fuels (petroleum derivatives). Natural Gas, which can be used in cooking and for heating homes. Coal, which is the main fuel burned in electric power plants.
Which claim is the most likely explanation for why the mouse population changed over time?
O The hawks eat more dark mice than white mice because the dark mice taste better.
O The white mice are able to reproduce more successfully than the dark mice do.
O The hawks eat more white mice than dark mice because they can see the white mice more easily.
O The hawks eat more dark mice than white mice because they can see the dark mice more easily.
Answer: the answer is C
Explanation:
Answer:
Answer is 3-The hawks eat more white mice than dark mice because they can see the white mice more easily.
Explanation:
I hope it's helpful!
Describe the northern and southern hemisphere in terms of the distribution of the cryosphere
Answer:
The cryosphere is the portion of the Earth's surface where water is in solid form. It thus includes sea ice, lake ice and river-ice, snow cover, glaciers, ice caps and ice sheets, and frozen ground. The snow cover has the largest extent, with a maximum area of more than 45 106 km2 (Table 1.1). Because of the present distribution of continents, land surfaces at high latitudes are much larger in the Northern Hemisphere than in the Southern Hemisphere. As a consequence, the large majority of the snow cover is located in the Northern Hemisphere (Figs. 1.15 and 1.16). The same is true for the freshwater ice that forms on rivers and lakes in winter. Both the snow cover and freshwater ice have a very strong seasonal cycle, as they nearly disappear in summer in both hemispheres (Table 1.1).
Explanation:
The cryosphere is the portion of the Earth's surface where water is in solid form. ... Because of the present distribution of continents, land surfaces at high latitudes are much larger in the Northern Hemisphere than in the Southern Hemisphere.
to -10.0 °C, wait until all the water has frozen, and then wait a little while more. What happens to the ice temperature after all the water is frozen?]
Answer:
Explanation:
I believe it will just get colder tbh