1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
GalinKa [24]
3 years ago
16

How has the EPA improved air quality over the last 30 years?

Biology
2 answers:
barxatty [35]3 years ago
8 0

Answer:

a

Explanation:

all of the other options make no sence at all

were talking about air not water

also dust storms really!?

and the last one is kind of true but the first one has more detail

Mrrafil [7]3 years ago
3 0

Answer:

a

Explanation:

You might be interested in
Throw some loght on dichloroindophenol chemical and its function in photosynthesis
madam [21]

Answer:

Dichloroindophenol chemical act as electron acceptor in photosynthesis

Explanation:

DCPIP (2,6-dichlorophenol-indophenol) in general is a dye of blue color which reduces to become colorless and hence act as an electron acceptor in the light reactions of photosynthesis

It is used to measure the rate of photosynthesis, because its reduction leads to identification of reducing agent (Diphenylcarbazide) in plant  that is produced at the time of photosynthesis with in the chloroplasts.

8 0
3 years ago
Plant reproduction by tissue culture differs from reproduction by meristem culture because
Leviafan [203]

The answer is; B

Meristem cells are totipotent meaning they can differentiate to any type of plant cells. Therefore they can produce a variety of plant type depending on epigenetic. However, tissue culture is derived from already differentiated cells. Therefore these cells are already determined and can only produce cell type of that plant from which they were derived.    


4 0
3 years ago
Also think about some ways students, parents, and communities can cope with the impact of school closures
s2008m [1.1K]

Answer:

they can learn at home

Explanation:

3 0
3 years ago
As water changes state the water either obsorbs or releases energy. Which of these answers is a process that releases energy?
Tcecarenko [31]
B snow melting because it turn to solid t liquid which is more energy<span />
6 0
3 years ago
You find a population of strange cells in a sample of pond water. You wish to determine first whether they are eukaryotic or pro
Colt1911 [192]

Answer:

Membrane bound cell organelles

Explanation:

A prokaryotic cell lacks a membrane defined nucleus and all the membrane-bound organelles. A eukaryotic cell has a membrane-bound nucleus and other membrane-bound organelles such as mitochondria, chloroplasts, endoplasmic reticulum, lysosomes, Golgi apparatus, etc.

To determine if a cell is a prokaryotic or eukaryotic, one can look for the nucleus and the membrane-bound organelles. If the cell has a nucleus and membrane-bound organelles, it is a eukaryotic cell. The absence of these structures makes it a prokaryotic cell.

5 0
3 years ago
Other questions:
  • Which level of organization is formed when a group of organs work together to perform complex functions?
    14·2 answers
  • Descrube 4 components of proper collection of soil
    5·1 answer
  • Growth that increases at a constant percentage per unit time is known as what growth
    14·2 answers
  • What part of dna stores the genetic code
    15·1 answer
  • This image is of a human embryo. It took many weeks of development to get to this stage. Prior to this, all of the human cells w
    9·1 answer
  • What is a specialized species
    8·1 answer
  • What is involved in redox reactions
    14·1 answer
  • Carbohydrates provide the body with
    12·1 answer
  • How do you tell wether a substance is a rock or a mineral
    9·2 answers
  • Why do earthquakes occur along the San Andreas Fault?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!