In October 2001 at the site of the World Trade Center in New York City, fires were still burning from the terrorist attacks that had brought down the buildings. The greatest danger to the respiratory system was

Answer:

toxic dust particles

Explanation:

After the World  Trade Centre buildings collapsed on September 11, 2001, dust particles resulting from crushed concretes mixed with other substances formed toxic were released into the atmosphere.

And these toxic particles post the greatest danger to the respiratory system of those lacking effective personal respiratory protective equipment.

What are 3 molecules that require active transport?

In subduction, what determines which plate will be on top and which will be on bottom?

An animal's growth rate is determined by
O many genes
O one specific gene
O only factors not related to genetics like feed
depends on the animal

what would be the mass of a charger block (Has to be grams)

Which of the samples shown below are eukaryotic?

TT att tt assume that in pea plants tall plant height is dominant to short plant height. Determine the phenotype from the genotypes.

Name three similarities between Mitosis and Binary fission.
1.
2.
3.

Every chemical compound is unique and different from the

Explain the relationship between the length of a Great White
Shark and how much food it eats per year.

Anna stated that carbon monoxide could not be organic because it is a gas. what is wrong with her statement?

A.) her statement is correct.

B.) Organic molecules can be gases.

C.) carbon monoxide is not a gas.

D.) Carbon monoxide is not organic because it is not produced by living things.

what are the number of birds in the world.​

please help me fast!!

Varicella-zoster is the virus that causes chickenpox. The average incubation period is 14 to 16 days after exposure. A person usually experiences a mild fever and fatigue for 1 to 2 days before rashes appear all over the body. A person having had chickenpox as a child may have the virus lay inactive in the nerve cells for many years only to reactivate much later as an adult in the form of shingles, which results in a very painful rash. This information suggests that the reproductive cycle of the varicella virus is -
a)lytic for shingles because the virus causes rashes to appear on the skin.

b) lysogenic for chickenpox because the virus attacks the mucous membranes.

c) lysogenic because the virus is a varicella-zoster virus.

d) lytic for chickenpox because the symptoms appear soon after infection.

Which of the following structures are found in eukaryotic cells? Check all that apply. endoplasmic reticulum mitochondria nucleoid Golgi apparatus
which of the following structures are found in both eukaryotic cells and prokaryotic cells? check all that apply. nucleus flagella ribosomes DNA nucleoid cell membranes endoplasmic reticulum​

The respiratory system is made up of the airways, lungs, and respiratory muscles. The lungs are classified as –
cells.
tissues.
organs.
organisms.
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During winter vacation, you learn that a polar jet stream is traveling across the United States. The forecaster says there will be big changes in the
weather as the jet stream moves past your town in Florida
What causes wind? Choose the two that apply.
<
A
uneven heating of Earth's surface
B В
warm air sinking while cold air rises
C
air movement from high to low pressure
D
air movement from low to high pressure

If Donald trump had no hair he would look how would he look like?

brainscape: Restriction enzymes: A) act at the membrane to restrict the passage of certain molecules into the cell. B) are highly specialized ribonucleases that degrade mRNA soon after its synthesis. C) are sequence-specific DNA endonucleases. D) are very specific proteases that cleave peptides at only certain sequences. E) catalyze the addition of a certain amino acid to a specific tRNA. c The biological role of restriction enzymes is to: A) aid recombinant DNA research. B) degrade foreign DNA that enters a bacterium. C) make bacteria resistant to antibiotics. D) restrict the damage to DNA by ultraviolet light. E) restrict the size of DNA in certain bacteria.

How do clastic sedimentary rocks form?


Fragments of rock are squeezed and cemented together.


Plant and animal remains are squeezed and cemented together.


Solid chemicals in water harden and form rocks.


Lava cools and hardens into rock.

Imagine two closely related, but separate, species of fish reproduce and the hybrids offspring have higher fitness than either of the parent species. Given enough time, the most likely outcome will be: Group of answer choices The two original species will eventually fuse into a third new species, and disappear. The two original species will remain, and a third new species will appear. Nothing: the two original species will remain, and the hybrids will eventually disappear.

Fish are sensitive to many environmental variables: dissolved oxygen, light, temperature, pH, clarity of water, food supply, presence of predators, etc. Fish will be attracted to different locations in a lake, based on its mix of variables.

Imagine you want to conduct an experiment to understand how just one of these variables differs in a local lake, depending on its depth. This lake reaches a depth of 17 meters. For this activity:

Pick a variable that might change as you go deeper in the lake on a given day.
Do a little research on that variable to determine how you might measure it in a lake.
Use the template below to outline an experiment to investigate this variable in the lake by depth. For each part, simply answer the question in parentheses to create your outline.
Type your response to each field in the space below that field:

Title: (Enter a brief, descriptive title. Hint: Sometimes it’s best to do this last.)

Purpose: (Why are you doing this experiment?)

Hypothesis: (What do you predict from this experiment and why?)

Procedure/Method: (How will you specifically carry out your experiment to test your prediction?)

Observations: (What specifically would you look for and record?)

Data analysis: (With this kind of data, what would be the best way to present it?)

Conclusion: [No need to enter anything here for now.]

References: (List any references you used to design the experiment. Note that for a full experiment write-up you’d also list any references you used while carrying out the experiment or in analyzing your results.)

The Kinetic Molecular Theory explains the movement and overall behavior of gases. A scientist claims to have found evidence
which requires a different explanation. What would a committee evaluating thescientist's claim MOST LIKLEY do first?

A. Add the idea onto the present theory.

B. Ask the scientist to conduct further research.

C. Experiment to see if similar results are observed.

D. Reject the idea because theories cannot be changed

What is a striation??

what is not a prevention method for the milkweed bug?

Look at the ecological pyramid here.
Which organism would you expect to find at level C?

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What percentage of people rank public speaking as their number one fear in life?
41%
50%
O 15%
0 95%
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Does global warming increase the amount of defective eggs birds lay

8. Which has the highest heating value?
- Bituminous coal
- Anthracite
- sub bituminous coal
- Lignite

Groups of cells work together as tissue. Groups of tissues from organ systems. True or False​