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maks197457 [2]
3 years ago
5

1.

Biology
2 answers:
xenn [34]3 years ago
6 0
I agree with A being correct
Vlad1618 [11]3 years ago
3 0
A) Villi are useful in providing more surface area!
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Which statement is true of both active transports and facilitated diffusion
ExtremeBDS [4]

Answer:

The active transport and the facilitated diffusion both involve the proteins present in the cell membrane. Facilitated diffusion transport the large and the charged molecules through the protein transport channels present in the cell membrane

Explanation:

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3 years ago
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Un laboratorio que produce una fórmula para matar piojos recibió muchas quejas de parte de sus
Rom4ik [11]

Answer:

Es probable que a través del tiempo la población de piojos también se vuelva resistente al segundo pijojicida. Los piojos resistentes se generan por un proceso de selección natural  

Explanation:

La evolución es el proceso mediante el cual los organismos cambian (evolucionan) con el tiempo con el fin de adaptarse a sus condiciones ambientales. La selección natural opera seleccionando aquellos individuos mejor adaptados al ambiente en el cual cada individuo se desarrolla. Los individuos adaptativamente superiores poseen más chances de sobrevivir y de reproducirse, trasmitiendo de este modo sus genes a la descendencia. Las mutaciones representan la fuente principal de variabilidad genética en la forma de nuevos alelos y genes. Las mutaciones que son beneficiosas y confieren una ventaja adaptativa son seleccionadas por selección natural. En este caso, la resistencia al primer piojicida se debió a la aparición de una o más mutaciones las cuales confirieron resistencia al primer compuesto. Con el tiempo, la frecuencia de los individuos portadores de mutaciones beneficiosas en la población de piojos fue incrementándose paulatinamente (como resultado del proceso de selección natural). Es muy probable que este proceso evolutivo también se repita con el segundo piojicida.

4 0
3 years ago
Carbon atoms are able to: give off electrons to form negative carbon ions bond with other carbon atoms to form long chains gain
Vitek1552 [10]

Answer:

<u><em>B</em></u>

Explanation:

Cuz carbon atoms bond with other carbon atoms to form long chains

8 0
3 years ago
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Why are most of the stomata on the bottom of the leaf
larisa86 [58]

Answer: Stomata plays very crucial roles in plants. During photosynthesis, gas exchange takes place via the stomata. Water also evaporates from plants through the stomata. In plants, most of the stomata are usually on the bottom of the leaf IN ORDER TO PREVENT EXCESSIVE LOSS OF WATER.

During the day, the sunlight falls on the leaf directly and draws water from the plants. Locating the stomata at the underside of the leave reduces the amount of water that can be lost through excessive evaporation. Also, locating the stomata on the underside of leaves prevent  the leaves from taking in too much water during rainfall.

3 0
3 years ago
Present at the centre of root and used in transportation of materials
AnnZ [28]

Answer:

C.root hair

Explanation:

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