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
Nookie1986 [14]
3 years ago
12

Jason lives near a state park, and he likes hiking through the grassy trails that lead to a nearby lake. He appreciates nature a

nd the surrounding components making up the ecosystem.
However, he often sees trash left near the lake, such as plastic bags floating near the shore.

Human activities disrupt the natural cycling of materials in an ecosystem. Identify and describe three human activities that negatively affect
Biology
1 answer:
laiz [17]3 years ago
8 0
1. Plastic Waster
2. Air Pollution
3. Toxic Sludge Dumping
You might be interested in
One reason that regulation of gene expression is important is that it saves energy and materials from being used when they are n
lara [203]

Answer:

d. transcriptional regulation (regulation of whether transcription occurs)

Explanation:

If the product of a gene is not needed, then allowing the transcription of such gene to proceed only to be regulated after or even after translation will result in a mere wastage of resources. It thus means that the resources utilized for transcription has been wasted.

<em>Hence, the correct option is d.</em>

5 0
3 years ago
What is a normal distribution of phenotypes
aksik [14]

Answer:

ima be honest i did not know so i had to look it up so i hope this helps?

Explanation:

Terms in this set (9)

normal distribution the frequency is highest for the the middle, or mean phenotype, and lowest for the ends, or extreme phenotypes

what phenotype has the greatest frequency in a trait that follows a normal distribution? ...

microevolution the observable change in the allele frequencies of population over time

7 0
3 years ago
Cytotoxic t-cell subpopulations are specialized to combat _______ pathogens, whereas helper t-cell subpopulations are specialize
Katarina [22]
<span>Cytotoxic t-cell subpopulations are specialized to combat intracellular pathogens, whereas helper t-cell subpopulations are specialized to combat extracellular pathogens.

</span>Cytotoxic t-cell  are CD8+ cells. Cytotoxic t-cell uses granzymes to <span>kill </span><span>intracellular bacteria, that lives in the cytosol such as viruses. They identify the pathogen forgein peptids that are bounded to MHC-I on the cell surface.
</span>
cd4+ T helper (Th) cells include Th1, Th2, and Th17 cells. They contribute to aliergic reactions and fighting extracellular  parasites.
8 0
3 years ago
Introduced invasive species like the Asian citrus psyllid is dangerous because
dimaraw [331]
Answer: D-All of the above
6 0
3 years ago
Did you notice a Distinctive smell for any sample?
hoa [83]
What sample are you talking about?
4 0
3 years ago
Other questions:
  • Fertilization occurs when _____.
    11·2 answers
  • What type of climate is irrigation mostly used in
    5·2 answers
  • Which of the following best characterizes an ecological footprint
    7·2 answers
  • What describes something in nature and predicts how it will behave without explaining why?
    5·2 answers
  • _________ are the food factories of the plants .​
    10·1 answer
  • Use the term "selectively permeable " in a sentence that demonstrates its meaning
    10·1 answer
  • What would happen if a major predator was removed from the food web?
    8·1 answer
  • If the nucleus of this cell has 84 chromosomes, how many chromosomes would this cell’s sperm cell have? A: 168. B: 84. C: 42. D:
    12·1 answer
  • Explain the flow of blood from a leg muscle to the heart and lungs and back to the muscle again listing each organ the blood tra
    10·1 answer
  • What is the rate of temperature change as the air warms up from 52C at 6:00am to 68C at 10:00an?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!