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matrenka [14]
3 years ago
6

Which act addresses abandoned hazardous waste sites with significant contamination?

Biology
1 answer:
Kryger [21]3 years ago
8 0
The Act which addresses this is THE RESOURCES CONSERVATION AND RECOVERY ACT [RCRA]. The act was passed on October 21, 1976.
The RCRA Act gives the Environmental Protection Agency the power to control hazardous wastes from the moment they are generated to the point when they are finally disposed of. 
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Need help on this plz help!!
nydimaria [60]

Tin, because it has five energy levels with four electrons in the fifth level .

Explanation:

Tin has an electronic configuration as

1s2,2s2,2p6,3s2,...........4d10, 5s2,5p2

They have four valence electrons in their outer shell

Among the four diagrams given Tin is least reactive because the atomic radius of tin is largest among all four options. Due to large atomic radius electronegativity decreases and hence Tin is the least reactive element among Neon, Chlorine, gallium and tin.

The electronegativity of an element is its tendency to complete its octet by attracting electrons towards itself. Also tin is at the lowest place in the periodic table among all the four mentioned elements, its ionization energy is also low hence less electronegative and least reactive.

6 0
3 years ago
The sporophyte of an unknown plant species grows as a separate plant than the gametophyte. The plant produces both female and fl
N76 [4]

Answer:

The correct answer would be "The plant is a fern, and sporophyte is its dominant phase".

Ferns refer to the lower plants which do not bear flowers, have leafy or feathery fronds, and they reproduce by spores.

They show alternation of generation in which sporophyte is the dominant stage.

The mature diploid sporophyte releases haploid spores with the help of meiotic divisions.

The haploid spore divides by mitotic division and matures into a haploid gametophyte. The single gametophyte bears antheridium and archegonium which release flagellated male gametes and egg (female gamete) respectively with the help of mitotic division.

The gametes fertilize to produce a diploid zygote.

The zygote divides mitotically and matures into the diploid sporophyte.

4 0
3 years ago
The use of stem cells in research and treatment remains controversial because stem cells come from
Tanzania [10]
Early embryos (unborn child)
5 0
3 years ago
9. Which of the following is a statement that describes a problem that can be solved using technology design?
Anna71 [15]
Answer: I would have to say the living room needs to be cleaned- because a robotic vacuum cleaner.
• Also It could be possible for a hockey player to use bungee cords to keep tension on his/her arms while practicing his/her shot to strengthen it.
4 0
3 years ago
Which two factors could increase the carrying capacity of an ecosystem?
Ket [755]

Answer:

the answer is A decrease in food supply and prediation.

8 0
2 years ago
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