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Related Questions
Sickle-cell anemia is a genetic blood disorder. Red blood cells normally have a round shape and pass easily through small blood vessels as they deliver oxygen to the tissue. But in people with sickle-cell anemia, some red blood cells are shaped like a sickle, or a "C." The red blood cells with this sickle shape do not live as long as healthy, round blood cells.
The sickling of red blood cells is thought to be due to problems with the hemoglobin gene. The unusual behavior of the hemoglobin causes rigid fibers of protein to form in the cell membrane, leading to a decrease in its flexibility and the change in cell shape. These rigid, deformed cells are more likely to rupture or get stuck in small blood vessels, creating a blockage. When blood flow to tissues is interrupted, this can lead to long-term damage to organs and even cause death.
1. a) Based on the information above, what are at least two changes that take place in the red blood cells of individuals with sickle-cell anemia? (2 points)
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it delivered oxygen easily
in sickle it cause problem
Explanation:
it because their blood cell is not spherical
in a eukaryotic cell, where does transcription occur?
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Answer:
transcription occurs in the nucleus, and translation occurs in the cytoplasm.
Explanation:
which features are found only on thoracic vertebrae?
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Answer:
The characteristic feature of thoracic vertebrae is the presence of joints that articulate with ribs. A mid-thoracic vertebra (shown here) has two joint facets on the vertebral body for the heads of adjacent ribs, and a third joint facet on the transverse process for the neck of a rib.
Explanation:
Why are antibiotics unhelpful for treating the common cold?
O A. Bacteria are not killed by antibiotics.
O B. Colds are caused by antibiotics.
O c. Antibiotics cannot treat illnesses.
O D. Colds are caused by viruses.
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Answer:
d cold are caused by viruses
Why do we have high and low tides?
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Answer:
It often accompanies a new moon and when the moon is closest to the Earth. The moon's gravitational pull on the Earth and the Earth's rotational force are the two main factors that cause high and low tides. Tides move around the Earth as bulges in the ocean.
chúng ta cần làm gì để bảo vệ môi trường sống không còn tác nhân đột biến?
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Tại sao sau khi bón phân đạm cho cây ko nên ăn sau khi bón?
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Answer:
PHÂN ĐẠM VÀ NHỮNG CÂU HỎI LIÊN HỆ THỰC TẾ !
- Tại sao không bón phân đạm cho đất chua?
* Giải thích: Đất chua là đất có độ pH<7 (do dư thừa ion H+), đất chua gây ra nhiều bất lợi cho việc giữ gìn và cung cấp thức ăn cho cây, đồng thời làm cho đất ngày càng suy kiệt cả về lý tính, hóa tính và sinh học . Khi bón phân đạm có chứa ion NH4+ ion này sẽ sinh thêm ion H+ theo phương trình NH4+ «NH3 + H+ ,làm tăng độ chua của đất.
- Tại sao không bón vôi và đạm amoni (NH4NO3, NH4Cl)
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Explanation:
what are three biotic factor that limit the carrying of any habitat?
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Answer:
Amount of food, competition with other species, habitat space
. List the measures to reduce noise pollution.
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Answer:
Turn off Appliances at Home and offices. ...Shut the Door when using noisy Machines. ...Use Earplugs. ...Lower the volume. ...Stay away from Noisy area. ...Follow the Limits of Noise level. ...Control Noise level near sensitive areas. ...Go Green by planning trees.1. Which of the following is the appropriate definition of a hypothesis?
O A proposed explanation that is already known.
O A theory about a problem.
A law that has been proven.
The reason for an observation.
O A proposed explanation that is testable.
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Answer:
A proposed explanation that is testable
Hope this helps!
Answer: It would be a proposed explanation that is testable.
Explanation: By definition, a hypothesis means an idea that is proposed for the sake of argument so that it can be tested to see if it might be true.
during dna replication the chromosomes contract and the identical halves are called
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Answer:
Explanation:
Sister chromatids
During DNA replication the chromosomes contract and the identical halves are called sister chromatids.
What is DNA replication?A double-stranded DNA molecule is copied to create two identical DNA molecules through the process of DNA replication.
Because every time a cell splits, the two new daughter cells must have the same genetic material, or DNA, as the parent cell, replication is a crucial process.
In prokaryotes, DNA replication takes place in the cytoplasm, whereas it happens in the nucleus in eukaryotes.
Before dividing, cells must copy their DNA. This promotes successful inheritance of genetic features by giving each daughter cell a copy of the genome.
The two identical copies of the DNA that are produced as a result of this replication are known as "sister chromatids," and they are connected to one another by a section of the chromosome known as the centromere.
Thus, the identical halves of chromosome is sister chromatid.
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Which of the following describes why a glucose transporter is needed to move glucose into the cell?
Glucose is nonpolar and requires ATP to move across the membrane.
Answer A: Glucose is nonpolar and requires A T P to move across the membrane.
A
Glucose molecules are polar and need to move from low concentration to high concentration.
Answer B: Glucose molecules are polar and need to move from low concentration to high concentration.
B
Glucose molecules are charged, and charged molecules are only ever actively transported.
Answer C: Glucose molecules are charged, and charged molecules are only ever actively transported.
C
Answer D: Glucose is large and polar and cannot pass through the phospholipid bilayer.
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A glucose transporter is needed to move glucose into the cell because glucose molecules are polar and need to move from low concentration to high concentration.
What do you mean by Glucose Transporters?Glucose transporters may be defined as proteins that facilitate the transport of glucose across the plasma membrane.
Glucose transporters work with the concentration gradient. This process of moving glucose across the cell membrane is called facilitated diffusion.
Therefore, a glucose transporter is needed to move glucose into the cell because glucose molecules are polar and need to move from low concentration to high concentration.
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how i know a chemical reaction took place
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Answer:
Gas bubbles, precipitation, color change, temperature change, if some light is produced, the volume changes, or taste and or smell changes.
Explanation:
I learned these were the 7 signs of a chemical reaction but some schools and curriculums vary on how many signs of reactions there are. I hope this helped!
Starch is found in foods such as peas, corn, and potatoes. For the body to receive energy from starch, it is broken down into smaller units. A mutation occurs in the gene that codes for a protein that breaks down starch.In which case will the mutation be harmful?
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This mutation would be harmful for the body because, when not able to break down the starch and use it for energy, the body will begin to have starch buildup and not be able to do anything with it. It would continue to build up and do some serious damage everytime someone who has this mutated gene eats food rich in starch.
MIXTURE OF WATER AND SOLUTE are called
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Answer:
A solution is another name for a homogeneous mixture. ... Salt dissolved in water is a solution. The major component of a solution, called the solvent, is typically the same phase as the solution itself. Each minor component of a solution (and there may be more than one) is called the solute.
Explanation:
Explanation:
A solution is another name for a homogeneous mixture. ... Salt dissolved in water is a solution. The major component of a solution, called the solvent, is typically the same phase as the solution itself. Each minor component of a solution (and there may be more than one) is called the solute
If the black horse is homeozygous, what is its genotype?
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Answer:
the genotype is BB.
Explanation:
what is the first layer of hair that is cut by scissors when receiving a hair cut?
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Answer: the guide?
Explanation:
Cuticle is the first layer of hair that is cut by scissors when receiving a hair cut.
What do you mean by cuticle?The cuticle is a layer of clear skin located along the bottom edge of your finger or toe. This area is known as the nail bed. The cuticle function is to protect new nails from bacteria when they grow out from the nail root.
A cuticle is a hydrophobic boundary layer on the outer surface of primary aerial organs. Its presence is a common feature of all vascular and some non-vascular plants.
The cuticle plays an important role in nail health. They provide protection for the tissue that grows new cells to build nails. As you know, your nails are constantly growing, that's why you have to keep them manicured.
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Si una mujer tuviera una masa de 60 kg, ¿cuál sería su masa en la Luna? (la gravedad de la Luna es de 1,67 m / s2)
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Answer: d
Explanation: just did it on edg
cancer is the result of an improperly regulated cell cycle
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An ecologist in Costa Rica wanted to determine the PGR for the country in 2018, and collected all of the data necessary to calculate the rate. She concluded that there were 34,560 births and 2,310 deaths within their population of 100,000. There were also 478 immigrants and 126 emigrants that year. What was the population growth rate for Costa Rica?
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The population growht rate is 32.602 % per year. Population growth can be calculated as = (births + immigrants) - (deaths + emigrants).
In this case, population growth is equal to = (34,560 births + 478 immigrants) - (2,310 deaths + 126 emigrants) = 32,602 new individuals per year
Total (original) population: 100,000 _____ 100%
32,602 _____ X
In consequence, the population growth rate per year can be estimated by the following equation:
X = (32,602 x 100)/ 100,000 = 32.602 %
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What are 4 facts about Earth's outer layer? Subject: Science 7th grade Plate motion.
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The outer core is the third layer of earth It is mainly made up of the metals iron and nickel
The outer core is responsible for earths magnetic fields
The magnetic field protect the earth from harmful particles that come from the sun
Cellular respiration in plants does not require atmospheric oxygen because
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Answer:
Oxygen produced during light reaction of photosynthesis is partially consumed during cellular respiration by plants and unconsumed oxygen is released in atmosphere. Thus plants produce oxygen in presence of light.
Answer:
it uses the oxygen generated in photosynethesis
Explanation:
sunlight gives what to the chloroplasts in side leaves
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Answer:
Chloroplasts absorb sunlight and use it in conjunction with water and carbon dioxide gas to produce food for the plant. Chloroplasts capture light energy from the sun to produce the free energy stored in ATP and NADPH through a process called photosynthesis.
Regions that have similar climate characteristics can be widely spread apart, but typically have which of the following in common?
A: Varying altitudes and similar precipitation
B: Corresponding latitudes and continental locations
C: Corresponding temperature and wind patterns
D: Similar ocean currents and vegetation
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C: Corresponding temperature and wind patterns are in common.
What are the 3 characteristics of climate?The simplest way to describe climate is to look at average temperature and precipitation over time. Other useful elements for describing climate include the type and the timing of precipitation, amount of sunshine, average wind speeds and directions, number of days above freezing, weather extremes, and local geography.
Climate features also include windiness, humidity, cloud cover, atmospheric pressure, and fogginess. Latitude plays a huge factor in determining climate. Landscape can also help define regional climate. A region's elevation, proximity to the ocean or fresh water, and land-use patterns can all impact climate.
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Which of the following situations show a biotic factor operating within an ecosystem? SC.912.L.17.7
A.
The kind of climate in a given region
B.
The concentration of hydrogen gas in the air
C.
The rate of water flow in a body of water
D.
Carnivores that eat other animals
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A biotic factor is a living organism that shapes its environment.
Carnivores that eat other animals is a situation which shows a biotic factor operating within an ecosystem. Thus, the correct option is D.
What are the biotic factors?
A biotic factor in an ecosystem is a living organism which shapes its surrounding environment. In a freshwater ecosystem, the examples of biotic factors might include aquatic plants, fishes, amphibians, and algae population.
An example of biotic factor should consist of living organisms such as the one "Carnivores that eat other animals". In this example, carnivores are the animals which eat other lower animals for their nutrition. Both the organisms are living hence are the biotic factors of an ecosystem.
Biotic factors of an ecosystem depends upon the abiotic factors for their survival such as water, climate, soil, temperature, and atmosphere, etc.
Therefore, the correct option is D.
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What is photosynthesis?
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Answer:
it's a good question well photosynthesis is a process in which plants absorb the sun light and convert it to energy to prepare Thier food.
Photosynthesis is a process by which plants and other organisms, such as algae, convert solar energy into chemical energy and use it to produce organic molecules. Photosynthesis is the main source of energy in the biosphere.
i need an answer asap
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Answer:
yes
Explanation:
Bec. water molecules are polar, hydrogen bonds from between water molecules,polarity has nothing to do with cohension, adhesion and have surface tensionHope this helps:)
how many chromosomes do human sperm and egg cells have?
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What makes a successful Aquarium
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Answer:
Im guessing animal control feeding the animals good glass and thickness also a strong bridge last is a passive shark
Explanation:
Like other living creatures, fish must meet certain basic needs for survival. Water, food and shelter are among the most important requirements:
• Water: Fish not only live in water, but they get oxygen from water. They breathe by taking water into their mouths and forcing it out through gill passages.
• Food: Fish must be able to find enough to eat at various life stages, whether they feed on microorganisms, small fish or larger prey.
• Shelter: Fish need a place to hide from predators and to reproduce. Some fish find shelter among submerged aquatic plants and shoreline vegetation, while others hide among rocks, soft sediments, or blend into clear, open waters.
and filtration
How long does it take the Earth to move from Point A to Point C?
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Answer:
Explanation:
As you know that the earth has two types of motions,
namely rotation and revolution. Rotation is the
movement of the earth on its axis. The movement of
the earth around the sun in a fixed path or orbit is
called Revolution.
The axis of the earth which is an imaginary line,
makes an angle of 66½° with its orbital plane. The
plane formed by the orbit is known as the orbital plane.
The earth receives light from the sun. Due to the
spherical shape of the earth, only half of it gets light
from the sun at a time (Figure 3.2). The portion facing
the sun experiences day while the other half away from
the sun experiences night. The circle that divides the
day from night on the globe is called the circle of
illumination. This circle does not coincide with the
axis as you see in the Figure 3.2. The earth takes about
24 hours to complete one rotation around its axis.
The period of rotation is known as the earthday. This is
the daily motion of the earth.
2021–22
MOTIONS OF THE EARTH 19
Figure 3.3 : Revolution of the Earth and Seasons
What would happen if the earth did not rotate? The
portion of the earth facing the sun would always
experience day, thus bringing continuous warmth to
the region. The other half would remain in darkness
and be freezing cold all the time. Life would not have
been possible in such extreme conditions.