Answer:
Có 4 kiểu tổ hợp giao tử có thể có của bố mẹ AaBb.
Một nửa số giao tử có alen trội A và alen trội B; một nửa số giao tử còn lại mang alen lặn a và a lặn b.
Cả bố và mẹ đều tạo ra 25% mỗi loại AB, Ab, aB và ab.
Explanation:
what is the role of the enzyme aromatase in sexual differentiation in reptiles?
Answer:
Aromatase helps to convert sex steroids, a group of hormones that influence sex development and reproduction, from male sex hormones (androgens) to female sex hormones (estrogens)
Explanation:
hope it helps you
Wha is biology and how it started and what kind of biology is this
Answer:
Basically biology traces the study of the living world from ancient to modern times. Although the concept of biology as a single coherent field arose in the 19th century, the biological sciences emerged from traditions of medicine and natural history reaching back to Ayurveda, ancient Egyptian medicine, and the works of Aristotle and Galen in the ancient Greco-Roman world. This ancient work was further developed in the Middle Ages by Muslim physicians and scholars such as Avicenna. During the European Renaissance and early modern period, biological thought was revolutionized in Europe by a renewed interest in empiricism and the discovery of many novel organisms
Explanation:
Answer:
Basically biology traces the study of the living world from ancient to modern times. Although the concept of biology as a single coherent field arose in the 19th century, the biological sciences emerged from traditions of medicine and natural history reaching back to Ayurveda, ancient Egyptian medicine, and the works of Aristotle and Galen in the ancient Greco-Roman world. This ancient work was further developed in the Middle Ages by Muslim physicians and scholars such as Avicenna. During the European Renaissance and early modern period, biological thought was revolutionized in Europe by a renewed interest in empiricism and the discovery of many novel organisms
True or false? The effectiveness of an exchange surface is increased if there is a long diffusion path.
Answer:
True
Explanation:
The Long and Diffusion Path can Help the exchange surface to increased rapidly in a long diffusion path. in other words it grows faster.
If the diffusion path is long, the effectiveness of an exchange surface is improved is false.
What is diffusion?Diffusion is defined as the net movement from an area of higher concentration to an area of lower concentration caused on by the dispersal of any material's in-solution or gas-particle particles.
Diffusion is the process by which dissolved chemicals enter or exit cells.
What are the parameters that affect the diffusion?the three parameters that affect diffusion are
The concentration gradient. temperature.length of diffusion pathway.the membrane's surface area.The rate of diffusion increases with the magnitude of the concentration gradientThe rate of diffusion will increase as the temperature rises.Diffusion will occur at a faster rate if one cell membrane is larger than another.How may an exchange surface's effectiveness be enhanced?a wide surface area. a thin membrane to offer a short diffusion pathway. an effective blood supply.ventilation of the animals.learn more about diffusion here https://brainly.com/question/2135861
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Someone help and plz make sure it’s right :) will mark brainiest
Answer:
total # of species
Explanation:
species richness is a number of different species represented in the ecological community landscape or region.
Answer: Species richness is the number of different species represented in an ecological community, landscape or region.
During the time of pandemic how Embroidery helps you become productive as a member of the family?
Answer:
It helps deal with stress, taking your mind on the task at hand. Trying something new can be fun and even productive around the house.
guys pls help me by saying answer
Science
heart
Answer:
vena cava: deoxygenated
it carries deoxgenated blood from the body back to heart.
aorta: oxygenated
Carries oxygenated blood from the heart around the body.
pulmonary artery: deoxygenated
Carries deoxygenated blood from the heart to the lungs.
pulmonary vein: oxygenated
Carries oxygenated blood from the lungs to the heart.
left atrium: oxygenated
receives blood full of oxygen from the lungs and then empties the blood into the left ventricle.
that's all I found from the question
(a) Identify the most likely mode of transport across the membrane for substance L. Explain how information provided helps determine the most likely mode of transport.
Active transport occurs against the electrochemical gradient. It needs energy to move molecules from the lower concentration side to the higher concentration side. The mode of transport is active transport.
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There are three main different types of transport across the membrane
Simple diffusion ⇒ Does not need energy to occurFacilitated transport ⇒ Does not need energy to occurActive transport ⇒ Needs energy to occurActive transport is the transport of molecules that move against the electrochemical gradient, so it does need energy to happen.
Molecules move from the lower concentration side to the higher concentration side of the membrane.
Carrier proteins are in charge of active transport. The needed energy might proceed from the ATP molecules or the membrane's electric potential.
In the exposed example, a scientist wants to determine how substance L enters a cells in a culture.
The cells maintain a 120 mM intracellular concentration of substance L. Varying external concentrations of substance L (10 to 100 mM) in culture medium (Table 1).Table 1. Rate of entry of substance L into mammalian cells in culture
External concentration of substance(mM) Rate of entry of substance L
10 5%
20 25%
30 45%
40 65%
50 80%
60 90%
70 95%
80 100%
90 100%
100 100%
Now, we need to identify the most likely mode of transport across the membrane for substance L, and explain how information provided helps determine the most likely mode of transport.
We know that the intracellular concentration is 120mM.
As we can see, this concentration exceeds all of the culture media concentrations. Yet, the substance keep moving into the cell.
As the concentration inside the cell is always higher than the concentration outside, we can assume that this is not passive transport because the molecule transport is going against its concentration gradient.
Hence, the remaining option is active transport. And as said before, we can see it because the substance keeps crossing the membrane toward the cell interior despite its concentration being higher in the interior of the cell than in the exterior.
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describe the appearance of the vacuole in a well watered plant
Answer:
Describe the appearance of the vacuole in a well-watered plant. What effect would this have on the cell wall of the plant? The vacuole would expand and take up most of the space inside the cell. This would create internal pressure on the cell wall.
Explanation:
how do potassium channels select the ion that can travel through the channel? group of answer choices membrane-spanning subunits concentration pore loop voltage
Answer: Potassium channels allow K+ ions to easily diffuse through their pores while effectively preventing smaller Na+ ions from permeation. ... This selection process occurs at the narrow selectivity filter that contains structurally identified K+ binding-sites
Explanation:
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List two characteristics of Coelenterata and Nematoda each.
Answer:
What are the two characteristics of Coelenterata?
Characteristics. All coelenterates are aquatic, mostly marine. The bodyform is radially symmetrical, diploblastic and does not have a coelom. The body has a single opening, the hypostome, surrounded by sensory tentacles equipped with either nematocysts or colloblasts to capture mostly planktonic prey.
What are the two characteristics of Nematoda?
Their body is bilaterally symmetrical and triploblastic. They are cylindrical in shape. They exhibit tissue level organization. Their body has a cavity or pseudocoelom.
Explanation:
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I don't understand anything about this topic, its urgently.
Entre las personas , la practica de estilos de vida denominados saludables ¿que consecuencias tiene sobre su metabolismo?
Answer:
El estilo de vida es una expresión utilizada para describir la forma en que se entiende o se percibe la vida. Este concepto no tan filosófico, sino más bien al estilo característico en que desarrolla de vida. Estos aspectos abarcan, relaciones personales, del consumo, y la forma de vestir. Ademas de ello, en la descripción de las actitudes, aptitudes, y preferencias que refleja un individuo en la sociedad.
Por su parte, se puede decir que el metabolismo es el conjunto de reacciones químicas a partir de los alimento, las cuales se desarrollan en el cuerpo con la finalidad de producir energía necesaria para el desarrollo del ser vivo.
Con todo esto, se puede decir que el estilo de vida, específicamente el consumo de alimentos pueden afectar de manera importante el metabolismo en un sentido que de acuerdo a las características de los productos que se consuman, las reacciones químicas generadas pueden variar.
Asimismo, dichos factores pueden ser de riesgo o generadores de bienestar, ya que alteran de manera directa el proceso dinámico de degradación de alimentos.
Explanation:
hans and zacharias janssen contribution to cell theory
Answer:
1590’s
What year did Hans and Zacharias Janssen contribute to the cell theory? Hans and Zacharias Janssen are known for inventing the compound optical microscope. They made it in the 1590’s. This contributed to “The Cell Theory” by making it easier and more practical whilst observing cells.
Explanation:
Cell theory states that all biological organisms are made up of cells, which is the structural and functional unit of life.
Scientists Hans and Zacharias Janssen invented the compound microscope that played a vital role in observing cellular functions.
Hans and Zacharias Jansen invented the compound microscope, which consisted of the eyepiece and an objective lens.
The scientists discovered the compound microscope in the late 16th century, which then helped many scientists to magnify and observe the microscopic structures.
Thus, the Janssens discovered the compound microscope.
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Ellie loves to canoe out at Sebago Lake. One summer day she went out on the water and gave her dad a call
on her cell phone to let him know she was okay. Although she was comfortable out on the water, her dad,
back on land, was suffering tremendously from the heat. Explain why Janet felt cooler than her dad, even
though they were within a mile of each other.
10. What 5 traits do the bird and its closest relative share?
Answer:
Feathers.
High metabolism.
A four-chambered heart.
A beak with no teeth.
A lightweight but strong skeleton.
Production of hard-shelled eggs.
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Which of the following best describes sickle-cell anemia?
A) Caused by environmental factors that an individual was exposed to during pregnancy.
B) A hereditary genetic mutation that causes a resistance to malaria.
C) An inherited disorder that increases the risk of contracting malaria from mosquitos.
D) A genetic mutation that is inherited from a dominant allele of one parent.
Answer:
A.
Explanation:
This is when a female reproduces alone
Answer:
Sickle cell anemia is one of a group of disorders known as sickle cell disease. Sickle cell anemia is an inherited red blood cell disorder in which there aren't enough healthy red blood cells to carry oxygen throughout your body. Normally, the flexible, round red blood cells move easily through blood vessels.
Explanation:
Based on "Sickle cell anemia is an inherited red blood cell disorder" taken from the text, I would say the correct answer is C, because it says "an inherited disorder" and describes Sickle cell anemia.
Hope this helps! :D
Which type of ATP production requires oxygen?
Answer:
Cellular respiration
Answer:
Cellular respiration
Explanation:
because it needs it to release energy from food for use by cells.
in a typical animal, mitosis produces _________, while meiosis produces____________.
In a typical animal, mitosis produces two identical daughter cells, while meiosis produces four unique daughter cells.
Meiosis is a type of cell division that involves the parent chromosome being halved and then divided again to form four unique daughter cells which have only one copy of chromosome from the parent.
This process occurs in sex cells such as the sperm and egg cells.
Mitosis is also a type of cell division but occurs with the parent cells to form two identical daughter cells.
This type of cell division have produces the same number of chromosomes the parents have and occurs in cells of the body which undergoes growth or during replacement of worn-out tissues.
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Unicellular organisms have different structures from each other.Explain why.
Answer:
The reason why is because in the process of reproduction; there are some mistakes in DNA replication (out of billions of base pairs about 120,000 mistakes). This is what brings us so much variation in organisms.
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Answer:
Respuesta: hola ami me parece que ya lo hiciste pero te dejo ejemplos:
Explicación: 1.Venezuela
2. Sanclemente
3. Marroquin
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Explanation:
Which of the following BEST describes the length of days in Australia when the Earth and sun are positioned as shown in January in the diagram above?
long days.
continual daylight.
short days.
continual darkness.
Answer:
B is the answer
Explanation:
continual daylight
In the given image it is showing long days. The correct option is A.
What is the relation between day and night?The Earth orbits the sun once every 365 days and rotates once every 24 hours on its axis.
Day and night are caused by the Earth rotating on its axis rather than by its orbit around the sun.
The term "one day" refers to the time it takes the Earth to rotate once on its axis and includes both day and night time.
A day is roughly the time it takes for the Earth to rotate or for other large astronomical objects to rotate.
The number of daylight hours we have depends on our latitude and how the Earth orbits the sun.
The axis of rotation of the Earth is tilted relative to its orbital plane and always points in the same direction means toward the North Star.
Thus, the correct option is A.
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Answer:both would be an unshaded square
Explanation:because if they both have the same thing and it doesn’t say either are shaded then they aren’t shaded
Match the description with the correct term
how does oxygen have a direct effect on sea urchins
Answer:
When the oxygen level is low in a Purple Sea Urchin, muscles associated with Aristotle's Lantern pump fluid through its body (through the canals). Carbon dioxide (waste/not good stuff) is released through the anus. The Purple Sea Urchin obtains oxygen through diffusion only (the diffusion of oxygen into the organism).
Explanation:
Brainliest please
Sea urchins breathe through their feet tubes because of nonavailability of lungs and gills in them. When the oxygen level is low at that time, the sea urchins pump fluids through their anus.
How are sea urchins able to survive sea ?Sea urchins are able to survive in sea because of the tiny hair called spines present on their body as water currents are created because of the hair and waste gets washed away with the water currents created.
When the carbon dioxide level gets increased in the sea at that time the skeletal structures of the marine animals are also affected.
The shells made up of calcium also gets affected because of the increasing acidity in the water. Carbon dioxide not so good is released through the anus and this totally affects the normal regulation of the creature.
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B. Directions. Read the given statement and provide the answer. You are in a community park. While walking, you have noticed that there are many rocks on the ground. From these rocks, how will you know if they are igneous rocks? What are the things you should consider in identifying igneous rocks?
Which statement accurately describes the bond that forms between carbon and oxygen to create carbon dioxide
Answer:
It's a non-polar covalent bond.
Explanation:
Non-polar means they do not interact with water. Carbon dioxide and Oxygen bonded together by sharing electrons equally.
model of a cell cycle
The cell cycle, or cell-division cycle, is the series of events that take place in a cell that cause it to divide into two daughter cells.
this is your answer
PLEASE ANSWER ASAP
Describe the structures and functions of each of the four groups of macromolecules. (Carbohydrates, Lipids, Nucleic Acids, Proteins)
Answer:
Nucleic acids: Stores and transfers info.
Carbohydrates; Store energy, provide fuel, and build structure in body, main source of energy, structure of plant cell wall.
Lipid: Insulator and stores fat and energy.
Protein: Provide structural support,transport, enzymes, movement, defense.
You are an engineer moving around your community and you find out that they are floods everywhere. What will you advise the community to do to improve the drainage?
Answer:
it depends on the severity of the flooding, if its extreme id say build canals
Explanation:
the contractile organelle of skeletal muscle fibers is
Answer:
The myofibrils are the contractile organelles in the muscle fibers.