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Dahasolnce [82]
3 years ago
13

Sickle cell disease is caused by a:

Biology
1 answer:
Tanzania [10]3 years ago
5 0
I think the correct answer from the choices listed above is option A. Sickle cell disease is caused by a change in allele. It is a disorder of the blood caused by an inherited abnormal hemoglobin. Hope this answers the question. Have a nice day.
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With which portion of an epithelial cell in the stomach would food be in contact?
Jobisdone [24]

Answer:

b) Apical surface

Explanation:

Apical surface is the portion of an epithelial cell in the stomach that food wouold be in contact with.

8 0
3 years ago
What percentage of earths history has included present day humans?
HACTEHA [7]
The timeline of human evolution outlines the major events in the evolutionary lineage of the modern human species, Homo sapiens, throughout the history of life, beginning some 4 billion years ago down to recent evolution within H. sapiens during and since the Last Glacial Period.
8 0
4 years ago
Catfish have dorsal fin spines, which help defend against predators, and caudal fins, which help to propel the fish through the
Yuliya22 [10]

Answer:

Swim bladder

Explanation:

Swim bladder is an organ in bony fishes such as catfish that controls their buoyancy. It is also known as air bladder. The swim bladder contains  gas, mainly oxygen and functions as a hydrostatic organ.

As the fish moves in deeper water, the gas in the swim bladder is contracted which decreases the volume of swim bladder.

3 0
3 years ago
Why was the Battle of Yorktown such a devastating defeat for the British?
jolli1 [7]

Answer:

Cornwallis had marched his army into the Virginia port town earlier that summer expecting to meet British ships sent from New York. ... Cornwallis' surrender at Yorktown effectively ended the Revolutionary War. Lacking the financial resources to raise a new army, the British government appealed to the Americans for peace

Explanation:

3 0
3 years ago
Que come un conejo????????
zimovet [89]

Answer:

La alimentación de los conejos

80% HENO.

15% HOJAS VEGETALES.

5% PELLETS.

HENO: La dieta debe ser muy rica en fibra por lo tanto un 80% de su alimentación diaria debe ser heno. Podemos diferenciar dos tipos de heno, de gramíneas (mezcla de hierbas secas y flores) o de leguminosas (alfalfa, trébol, soja, etc.).

Explanation:

los conejos comen muchos alimentos, pero principalmente verduras

5 0
3 years ago
Read 2 more answers
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