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tankabanditka [31]
2 years ago
9

The clean air act of 1993 was an improvement over the air pollution control act of 1995 because it​

Biology
1 answer:
Tema [17]2 years ago
7 0

The law reduced acid rain and improved public health by dramatically reducing emissions of sulfur dioxide (SO2) and oxides of nitrogen (NOx).

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Question 1
koban [17]

Answer:

Most tissues of the body grow by increasing their cell number, but this growth ... photography of a live plant cell nucleus undergoing mitosis.

5 0
3 years ago
What example implies that a cell membrane receives and sends messages?
True [87]
A transport protein allows glucose to enter a cell
6 0
3 years ago
Common rosefinches arrived in Hawaii roughly 6 to 7 million years ago and have since evolved into at least 56 new species of hon
nika2105 [10]

Answer:

A. Some speculate that they were blown out to the islands by a massive storm

Explanation:

The common rosefinches are thought to have arrived on the Hawaii islands between 6 and 7 million years ago. As the common rosefinches are not big birds and they can not fly over very long distances, the scientists believe that it is a massive storm that blow some individuals to the Hawaii islands. This is nothing weird, as it has been witnessed numerous times how massive storms manage to carry some smaller birds to places where they are not able to fly on their own. Once there, the birds encountered suitable conditions for living and lot of open niches in the food chain. This resulted in quick diversification of the common rosefinches, with members of the species gradually adapting to a particular niche, experiencing changes to be more competent, and creating numerous new species after some time.

5 0
3 years ago
The Products (molecules on the right side of a chemical equation) of Aerobic Cellular Respiration are __________.
NISA [10]

Answer:

The products of aerobic cellular respiration are <u>CO2</u>, <u>H20 (Water Vapour)</u>, and <u>Energy</u>.

C6H1206 + O2 ➔ CO2 + H20 + Energy

Glucose + Oxygen ➔ Carbon Dioxide + Water Vapour + Energy

6 0
2 years ago
6. (3 pts) After transformation, 40 colonies were present on the plate. What is the transformation efficiency of the competent c
natali 33 [55]

Answer:

Given:

Number of colonies on plate = 40

Amount of DNA used for transformation = 100ng

Volume of competent cells used = 100ul

Total volume = 1ml (1000ul)

Volume plated for growth = 200ul

The amount of cells transformed per 1 µg of DNA is called the transformation efficiency

(CFU is colony forming units) => (number of colonies on plate/ng of DNA plated) X 1000 ng/µg = CFU/µg of DNA

Amount of DNA used for plating = 100ng * (200/1000)

                                                      = 100ng * (1/5)

                                                      = 100/5 = 20ng

Efficiency calculation = 40 colonies / 20ng = 2 colonies/ng

               (2 colonies/ng) * (1000 ng/µg) = 2000 CFU/ug DNA

Transformation efficiency = 2000 Transformants / ug DNA

                                          = 2 x 10³ Transformants / ug DNA

Explanation:

Efficiency of transformation is highest in the 100 pg-1 ng range, so Low transformation efficiency could be because of high amount of DNA used for transformation.

6 0
2 years ago
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