Sickle cell anemia illustrated in the picture below is the result of a mutation. What is the likely cause of this genetic mutation?

There's no picture.

Sickle cell anemia results from a mutation in a gene called HBB, which contains the blueprint for cells to make part of a protein called hemoglobin. The hemoglobin protein is made up of two alpha chains and two beta chains.

Sickle cell anemia is the result of a point mutation, a change in just one nucleotide in the gene for hemoglobin. This mutation causes the hemoglobin in red blood cells to distort to a sickle shape when deoxygenated. The sickle-shaped blood cells clog in the capillaries, cutting off circulation.

What made the 1918 flu virus so deadly?

Atoms are the most basic unit of matter. Two or more atoms from the same or different elements can combine to form molecules.
Cells are the most basic unit of life. Cells are made up of many different types of molecules. Which of the following accurately shows higher levels of organization within organisms, from least complex to most complex?
A. cells → organs → organ systems → tissues → organism
B. cells → tissues → organs → organ systems → organism
C. cells → organ systems → organs → tissues → organism
D. cells → organs → tissues → organ systems → organism

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Scientists recently discovered a species of bacteria that’s capable of photosynthesis, but it’s anaerobic and doesn’t produce or use oxygen for respiration. Which process will be absent in this organism?
A.
Calvin cycle
B.
electron transport system
C.
glycolysis
D.
Krebs cycle

4 Why will alcohol keep on boiling even after the flame was turned down?
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For centuries, scientists believed that light waves traveled through a substance called "aether." Which of the following facts refutes this belief?

A.
Light waves can propagate through a vacuum.
B.
Aether has never been observed.
C.
Light waves can have many different wavelengths and frequencies.
D.
Light waves can travel extremely long distances.

Which of the following is not a function of a vertebrate’s endoskeleton?

a.) Increase speed of digestion
b.) Protect major organs
c.) Offer support and structure
d.) Connect with muscles to create movement

Introducing substances into the air that may be harmful to living organisms or the environment is called
A) photolysis
B) eutrophication
C) air pollution
D) the chimney effect
E) entropy

Which of the following is a way in which the atmosphere does NOT
interact with the hydrosphere? *
A). Decreasing the salinity of oceans from increased temperatures causing glacial
melting.
B). Developing hurricanes over warm ocean currents.
C).Increasing the amount of water evaporation from oceans and global temperatures
rise.
D). Gases moving sediment from hill tops

Which part always comes FIRST in the scientific name?

Would a cell lyse be hypertonic

3. A bacterium undergoes a mutation that
makes the bacterium resistant to an
antibiotic. Which is not an accurate statement
about the effect of this mutation?
A. This mutation could be considered an
adaptation.
B. A bacterium with this mutation would be
less likely to successfully reproduce.
C. The bacterium with this mutation would
have a greater chance of surviving
exposure to antibiotics.
D. A bacterium with this mutation would be
more likely to pass it on to offspring than a
bacterium without this mutation.

Question 4
Generally, the more a food has been altered from its original form, the less healthy it
is.
A.) True
B.) False

how does an increase in volume affect the gas pressure in a balloon

Pretest: World Trade and communication
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Select the correct answer from each drop-down menu.
What type of grain farming generally occurs in the United States?
This type of farming relles heavily on
Farmers in the United States are engaged in
to cultivate large areas of land.

The use of which of the following is not an agricultural practice that benefits soil microorganisms?
a.
crop rotation
b.
monoculture
c.
companion planting
d.
cover crops

Which of these statements is most likely correct about Location A and Location B?
Location A and Location B will be equally cold because they are on the same
latitude.
Location B will have cooler summers and warmer winters than Location A.
Location A and Location B will be equally warm because they are on the same
latitude.
Location A will have cooler summers and warmer winters than Location B.

9. Bogs, marshes, and swamps are examples of what type of ecosystem?
A.
desert
B.
wetland
C.
intertidal zones
D.
coniferous forest

A simple multiple choice question (good luck!!) [25 points]

Which statement correctly shows the flow of energy in a food chain?

A.
Producer→ heterotroph → decomposer

B.
Producer ← consumer ← decomposer

C.
Autotroph← decomposer ← consumer

D.
Autotroph→ decomposer→ heterotroph

Fill in the blank...

Question: Matter____ ecosystems.

Options:
A. flows out
B. is found only in
C. stays in the same parts of
D. cycles around​

Need help ASAP! Will give brainliest;) NO links please, will report.

Which statement is part of Darwin’s theory of evolution by natural selection?

A). Acquired characteristics that are inherited are the cause of evolution.

B). The organisms that are the fittest are always largest and strongest.

C). The number of offspring is not related to fitness.

D). More offspring are produced than can possibly survive.

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Carbon has an atomic number of 6. Which of the following does the atomic number 6 tell you about carbon?

What do folded mountains indicate happened in an area?

(A) Tectonic plates have been sliding past each other

(B) Tectonic plates have stopped moving and remained still.

(C) Tectonic plates have been travelling away from each other.

(D) Tectonic plates have collided and pushed against each other.

can I get a summary about A Day in the Life as a pediatrician?

8 amino acide are coded by _______ amino acids?

After fertilization, the successful development of a mature, full-term fetus depends on A. The release of human chorionic gonadotropin (hCG) by the developing placenta AND the production of estrogen and progesterone by the placental tissues B. the release of human chorionic gonadotropin (hCG) by the developing placenta C. maintenance of the corpus luteum for all 9 months D. all of these E. the production of estrogen and progesterone by the placental tissues