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)
it delivered oxygen easily
in sickle it cause problem
Explanation:
it because their blood cell is not spherical
What is photosynthesis?
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.
How long does it take the Earth to move from Point A to Point C?
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.
during dna replication the chromosomes contract and the identical halves are called
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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i need an answer asap
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 tensionexplain at least three functions that lipids serve in plants and/or animals.
Answer:
they serve as structural components of cell membranes, function as energy storehouses, and function as important signaling molecules.
Explanation:
1_____________________It is the temperature required for a liquid to become a gas.
2. _____________________It is the force upon a surface of an object by another force.
3_____________________It does not have a definite volume or shape. The atoms and molecules move freely and spread from one another.
4. _____________________It is the process where gas state turns into liquid state.
5. _____________________It is the process where liquid state turns into a gaseous state.
6. _____________________It is the transition from liquid state to solid state.
7. _____________________It is the change from a solid state directly to the gaseous state without going to a liquid phase.
8. ____________________It is the degree of hotness of a substance, related to the average energy of its molecules or atoms.
Answer:
1) 212° F
2)applied force
3)gases
4) condensation
5) evaporation
6) freezing
7) sublimation
8) temperature
Answer:
1) 100 °C
2) Applied force
3) Gas?
4) Condensation
5) Vaporization
6) solidification
7) Sublimation
8) Temperature
which of the following statements is most likely to be true in the case of the feedback-regulated
Answer:
Where is the statements because you didn't write it.
The Earth moves in predictable patterns. One of these patterns causes approximately 12 hours of daylight and 12 hours of darkness during a 24-hour period in areas around the equator.
This movement is referred to as —
A. a rotation
B. an equinox
C. a photoperiod ,
D. a revolution
Answer:
D
Explanation:
A Revolution. One revolution is equal to a day.
which structure is lined with simple squamous epithelium?
Answer:
En los tejidos epiteliales, las células están estrechamente unidas entre sí formando láminas continuas que tiene distintas características: q No están vascularizados, por ello se nutren por difusión. q Como regla general, debajo de todo epitelio siempre hay tejido conectivo (la lámina basal).
Explanation:
(ii) Describe an experiment he could carry out to show that auxin causes bending of a
shoot.
Answer:
Illumination results auxin moving to the dark side of stem tips. As this auxin diffuses down the dark side of the stem, the cells respond by enlarging. This causes the plant to bend toward the light.
which features are found only on thoracic vertebrae?
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:
MIXTURE OF WATER AND SOLUTE are called
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
Which two chemical processes are represented by the equation below?
starch + water <—enzymes—>
sugars
Hydrolysis + water because when the starch is being added with water the water is breaking it down
Explanation:
after the blood leaves the heart, through what kinds of vessels and in what order does the blood move?
Answer: the pulmonic valve, into the pulmonary artery and to the lungs.
Explanation:
Which of these is a component of the atmosphere?
rock
oxygen
sediments
soil
Answer:
oxygen
Explanation:
oxygen is a gas
the others are solids and cannot physically stay in the atmos phere, let alone be part of it
Assignment : Write 5 characteristics of each: chlamydomonas
amoeba
paramecium
diaom
Answer:
Here is the answer to your question.
Explanation:
Chlamydomonas: Motile unicellular algae, generally oval, cell wall is made up of a glycoprotein and non-cellulosic polysaccharides instead of cellulose, two anteriorly inserted whiplash flagella, contractile vacuoles are near the bases of flagella.
Amoeba: Amoeba is a unicellular organism found in stagnant water, the size of amoeba is 0.25, they move with the help of a finger-like projection called pseudopodia, the cytoplasm is differentiated into two parts, the outer portion is ectoplasm and the inner portion is called endoplast, amoebae are eukaryotes whose bodies most often consist of a single cell.
Paramecium: Paramecia cells are characteristically elongated, Paramecia are eukaryotes, asexual reproduction (binary fission), sexual reproduction (conjugation), autogamy (self-fertilization).
Diatom: Diatoms have two distinct shapes: a few (centric diatoms) are radially symmetric, while most (pennate diatoms) are broadly bilaterally symmetric. A unique feature of diatom anatomy is that they are surrounded by a cell wall made of silica (hydrated silicon dioxide), called a frustule.
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(PLEASE HELP )Read the passage below. Highlight the concerns of the plaintiff. Then answer the question to the right.
Recently, the Supreme Court of the United States reversed a lower court ruling that allowed a company to patent DNA sequences for two cancer genes. The patent prevents other scientists from using these DNA sequences for any reason. The company uses the DNA sequences to market kits used to identify the two types of cancer in humans. The company claims that the gene sequences are its intellectual property. it's owner feels that allowing other people to access the sequences will harm his company financially because the search for the gene sequences was very expensive.but the plaintiff in the case argue that Gene sequences are products of nature that cannot legally be patterned the plaintiff explain to the judge that the kids are very expensive as a result some patients who need these tests cannot afford to have them done.
Answer:
Explanation:
I got it right
What prevents liquids from mixing with water
Explanation:
hydrogen bonds makes liquids not mix in with water
in a eukaryotic cell, where does transcription occur?
Answer:
transcription occurs in the nucleus, and translation occurs in the cytoplasm.
Explanation:
what do the three major checkpoints for cell division have in common?
Answer:
There are three major checkpoints in the cell cycle: one near the end of G1, a second at the G2/M transition, and the third during metaphase. Positive regulator molecules allow the cell cycle to advance to the next stage. ... Each successive cell division will give rise to daughter cells with even more accumulated damage.
Explanation:
ARE ALL CELLS THE SAME?
Answer:not at all!
Explanation: There are many different types of cells! Just think of the differences between a plant cell and an animal cell, the plant cell has a few different organelles than an animal cell and is missing a few that are in an animal cell as well!
. List the measures to reduce noise pollution.
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.
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.
what is a chain of molecules linked with peptide bonds
Answer:
polypeptide chain
Explanation:
each amino acid unit in a polypeptide is called a residue. A polypeptide chain has polarity because its ends are different, with an α-amino group at one end and an α-carboxyl group at the other.
A chain of molecules connected by peptide bonds forms a polypeptide, a fundamental component of proteins. Peptide bonds are chemical bonds that link amino acids, the building blocks of proteins. This chain structure determines a protein's shape and function.
A polypeptide is made up of a series of molecules connected by peptide bonds and is an essential component of proteins. The coupling of amino acids is made easier by peptide bonds, which are produced by a condensation reaction between the carboxyl group of one amino acid and the amino group of another.
These amino acids, which are the building blocks of proteins, each have a distinct side chain, or R-group, which influences their characteristics. A polypeptide chain's amino acid composition determines the protein's three-dimensional shape, which is essential to its function. This complex link between structure and function emphasizes the importance of peptide bonds in biological processes.
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Which of the following is likely to cause widespread damage to an island after an earthquake?
4. Some early mornings , dew drops can be found on grass or a car parked outside,
but not on other materials such as the sidewalk. Why is that?
the nighttime temperature on grass and the car went below the dew point, but
the temperature of the concrete did not drop enough to reach the dew point
level
temperature on the grass and sidewalk were both above the dew point levels all
night
the relative humidity of the air above the grass was higher than it was above the
concrete
none of the above
Dew drops can be found on grass or a car parked outside but not on other materials such as the sidewalk because; The nighttime temperature on grass and the car went below the dew point, but the temperature of the concrete did not drop enough to reach the dew point level.
Definition:
The dew point is simply defined as the temperature below which the water vapour in a given volume of air at a constant pressure will condense into liquid water. More specifically, the dew point is the temperature at which the air is saturated with moisture.From the definition above, it is evident that the fact that the nighttime temperature on grass and the car went lower than the dew point temperature is responsible for the condensation of water vapour on grass and the car as opposed to the case in Concrete.
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Which would best be used as an index fossil?
O A. alligator bones, because they have lived a long time with relatively few changes in body structure
O B. petrified wood, because it clearly shows the parts of the wood replaced by minerals
O C. sedimentary rock, because it is found in horizontal layers created in succession
O D. trilobites, because they lived for a short period of time and then became extinct
Organelle s is most likely the ___________________.
smooth endoplasmic reticulum
rough endoplasmic reticulum
golgi apparatus
centrioles
Answer:
Answer is smooth endoplasmic reticulum
Explanation:
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If the black horse is homeozygous, what is its genotype?
Answer:
the genotype is BB.
Explanation: