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Pavlova-9 [17]
3 years ago
9

Individual cells are usually very small because...?

Biology
2 answers:
sveta [45]3 years ago
7 0
They are usually small because they need to transport nutrients across the membrane. Only particular amount can cross per/area. As the volume of cell increases, it increases in geomatrically faster than the area of the membrane.It becomes difficult to a certain point to supply the given volume with enough membrane to allow the gases/other molecules to transport across the membrane

:)
Rama09 [41]3 years ago
4 0
Because the people that mae them wanted them to be very small

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lozanna [386]
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3 years ago
How does lactation differ in monotremes and therian mammals
Soloha48 [4]
<span>Lactation is different between monotremes and therian mammals because monotremes are oviparous and have cloaca . Oviparous means they lay eggs, and generally animals that lay eggs do not nurse their young or lactate. Therian mammals give live birth, these are the animals that use breast milk to nurse their young.</span>
4 0
3 years ago
Overall, how has science impacted human health?
mixas84 [53]

Answer:

The correct answer is: <em>C. Increased average lifespan to 78 in the US.</em>

Explanation:

Science has impacted human health by increasing the average lifespan to 78 in the US. Over the last couple of decades, the life expectancy of Americans has increased significantly than what it was 200 years ago. This can be attributed to:

1. Vaccinations- Since the invention of vaccinations, diseases such as tuberculosis, cholera and polio which were major causes of death 200 years ago have virtually been eradicated in the US.

2. Abundant and safer foods available- Commercial and large scale farming has made a wide variety of nutritious foods easier to obtain.

3. Improved sanitation- Safer drinking water, sewage treatment and stricter food inspection has significantly reduced the rate of illnesses due to poor hygiene and sanitation.  

In these ways, science has impacted human health by increasing the average lifespan to 78 in the US.

8 0
3 years ago
El pelo rizado en los perros, domina sobre el pelo liso. Calcular el porcentaje del fenotipo de los descendientes de una pareja
creativ13 [48]

Answers:

el pelo rizado en los perros domina sobre el pelo liso. una pareja de pelo rizado tuvo un cachorro de pelo tambien rizado y del que se quiere saber si es heterocigótico ¿ con que tipo de hembras tendrá que cruzarse?

4.6/5

296

El cachorro puede ser "Aa" o "AA". Se quiere saber si es "Aa". Para eso, tendría que cruzarse o con un homocigoto recesivo (aa), puesto que es el que da un 50% de probabilidades de que los hijos sean de pelo rizado.

Entonces, si se cruza con un homocigoto recesivo, la probabilidad de la descendencia debería ser 2 cachorros de pelo rizado y 2 cachorros de pelo liso.

La hembra tendría que ser de pelo liso para asegurarse de que sea homocigoto recesivo.

Si todos los cachorros salen con el pelo rizado, entonces el padre es homocigoto "AA".

Si al menos uno sale con el pelo liso, entonces el padre es heterocigoto "Aa"

6 0
3 years ago
When carbon bonds with oxygen, what gas is formed?
Troyanec [42]

Answer:

Carbon Monoxide

Carbon forms two important gases with oxygen: carbon monoxide, CO, and carbon dioxide, CO2

Explanation:

Hope this helps:)

8 0
2 years ago
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