A student is instructed to record the odor of a substance after heating it in a test tube. Which is the
correct safety procedure for the student to follow?
A Wave the fumes from the test tube toward the nose with a hand and inhale
B. Tilt the test tube toward the nose and inhale
C. Place the test tube directly under the nose and inhale
D. Cup hands over the test tube and inhale

Answers

Answer 1

Answer:

A Wave the fumes from the test tube toward the nose with a hand and inhale

Explanation:

Answer 2

Answer:

A. Wave the fumes from the test tube toward the nose with a hand and inhale

Explanation:

Hope this helps


Related Questions

which scenario is an example of the transfer of thermal energy by conduction?

Answers

Answer:

heat causes winds to blow from the water to the land. Heated air molecules in a hot air balloon soon carried thermal energy to the top of the balloon. this is an example of conduction.

Explanation:

Have a nice day :)

Ivy grows specifically on stone walls, what type of response is this?
A. Hydrotropism

B. Thigmotropism

C. Phototropism

D. Geotropism

Answers

Answer:

B. Thigmotropism

Explanation:

Thigmotropism is a directional growth movement which occurs as a mechanosensory response to a touch stimulus. Thigmotropism is typically found in twining plants and tendrils, however plant biologists have also found thigmotropic responses in flowering plants and fungi.

Answer:

B. Thigmotropism

Explanation:

The ivy grows specifically on stone walls, it shows Thigmotropism.

Te
а.
Which of the following is a way that scientific advancements have benefited society?
increased energy efficiency
Б. increased resource use
increased urbanization
d changes in the global climate
C.
Please select the best answer from the choices provided
Mark this and return
Save and Exit
Next
Submit

Answers

Answer:

Б. increased resource use

increased urbanization

how does oxygen help? name at least 3 reasons for brainliest :)

Answers

Hi! Oxygen helps us humans by giving us the ability to breath and continue to live. Our cells need oxygen to make energy and we use energy everyday when we do our chosen activities. We use oxygen to create water and we need water to continue our adventure on Earth everyday without Oxygen we would die. I hope this helps, Goodluck :)

Nerve cells are called
A. neurocytes

B. neurons

C. prokaryotes

D. white nerve cells

Answers

Answer:

Neurons

Explanation:

Answer:

Hi, there your answer is B.Neurons

Explanation:

Nerve cells are called neurons.

Hope This Helps :)

how photosynthesis and cellular respiration work together

Answers

Answer:

Photosynthesis converts carbon dioxide and water into oxygen and glucose. ... Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.

Hope this helped :)

Explanation:

In guinea pigs, the allele for short hair is dominant to long hair. A guinea pig with short hair is crossed to one that has long hair. Over a period of years, a scientist keeps records of the offspring and finds that 44 of them have short hair and 46 of them have long hair. Based on this data, what are the genotypes of the parents:
1. HH x hh
2. Hh x hh
3. HH x Hh
4. hh x hh

Answers

I would choose Option 2

about 50% chance that the dominance is in, but when it is, its dominant, of course.

no other Option can give you a 50% chance

in 1 its always there, in 3 as well, in 4 never

option 2 i believe so

How many acres of land do you think were required for all forms of food except
beef?
A. 20,475 acres
B. 45,510 acres
C. 105,000 acres
D. 410,505 acres

Answers

The answer would be 105,000

help!
Are viruses alive?

Answers

Most biologists say no they are not

Answer: As for now, no, it is not clarified but most biologists say no. Because viruses don’t grow, aren’t made out of cells, can’t stay in a stable state, nor can they make their own energy. Most living things do these things, so the are classified as nonliving.

Hope this helps, good luck! :)

example of made up negative feedback loop

Answers

Answer:

negative feedback loop involving insulin and glucagon help to keep blood glucose levels within a narrow concentration range. If glucose levels get too high, the body releases insulin into the bloodstream.

hope it help

Cellular respiration is how living things obtain energy for life. The organelle where cellular respiration takes place is the

A. chloroplast

B. Golgi body

C. mitochondria

Answers

Answer:

C. Mitochondria

Explanation:

Yes mitochondria is correct

The chart below demonstrates the number of genetic differences between 9 species. Which two species are least closely related to each other according to the information provided?

Answers

Hi. You did not submit the chart to which this question refers, which makes it impossible for it to be answered. However, I will try to help you as best I can.

Generally speaking, we can state that the two species that are less genetically related are those that present more genetic differences between them. This is because the number of genetic differences is greater in species that have no genetic relationship, or that have a very weak genetic relationship.

In this case, to answer this question, you need to assess which two species, shown on the chart, have the greatest number of genetic differences between them.

Can someone help me if this is correct

Answers

Answer:

As far as i know yes it is correct

Explanation:

Heterotrophs create their own food.
O True
O False

Answers

The answer is false

Answer:

true

Explanation:

because autotrophs depends on others for their food not heterotrophs

The type of useful energy that cells need is called
A. food

B. ATP

C. oxygen

D. glucose

Answers

Answer:

B. ATP

Explanation:

The ATP is the type of useful energy that the cells need.

Answer:

B. ATP

Explanation:

The type of useful energy that cells need is called ATP

Deforestation can cause all living organisms to die. *
True
False

Answers

Answer:

False

Explanation:

usually,all animals do not die during deforestation. only few animals die. Actually, deforestation is the factor that leads to nature to regenerate itself. Through resistance and resilience, many new organisms are evolved. As evolution and extinction is the two side of coin, deforestation does not cause all animal to die.

Hope it helps☺️

False. Some Micro organisms survive in the soil

A cruise ship makes its way from one island to another. The ship is in motion compared with which reference point?
A.
the passengers on the ship
B.
the captain of the ship
C.
a lighthouse on a nearby island
D.
the cargo inside the hull of the ship

Answers

The answer is (C ) a lighthouse on a nearby island

Answer:

C. A Lighthouse on a nearby island

Explanation:

The moving cruise ship from one island

The graph shows the size of two populations of the same species over time.
35
30
25
20
Number of individuals
15
Area A
10
Are B
5
1.2) 45.628101112131415
Time
Which of these limiting factors is likely to be more plentiful in area A than in
area B?
A. Flooding
B. Disease
C. Shelter
D. Predators

Answers

Based on the given information, it is likely that the limiting factor more plentiful in Area A than in Area B is "C. Shelter.

What are limiting factors?

Limiting factors are factors that restrict the growth, distribution, or abundance of a population or organism within an ecosystem. These factors can be biotic (such as competition, predation, or disease) or abiotic (such as temperature, water availability, or nutrients).

The presence or absence of limiting factors can affect the carrying capacity of an ecosystem, which is the maximum population size that the ecosystem can support over time. Understanding limiting factors is important in ecology and conservation biology, as they can affect the health and sustainability of ecosystems and species.

The limiting factor more plentiful in Area A than in Area B is "C. Shelter." This is because the population in Area A consistently shows a higher number of individuals over time, which suggests that there is more suitable shelter or habitat available to support the growth of the population

Learn more about limiting factors, here:

https://brainly.com/question/3406210

#SPJ7

Can someone please help me if this is correct

Answers

Answer:

b

Explanation:

Which characteristics of sexual reproduction has specifically favored the survival of animals that live on land? * ASAP PLEASEE
1 point
A. fusion of gametes in the outside environment
B. male gametes that may be carried by the wind
C. fertilization within the body of the female
D.female gametes that develop within ovaries

Answers

Answer:

C. Fertilization within the body of the female

which of the following processes occurs when nuclei begin to surround the chromosomes on either end of the pole during meiosis I?
a. prophase I
b. metaphase I
c. anaphase I
d. telophase I

Answers

Answer:

a

Explanation:

How does survivorship relate to an individual's fitness?

Answers

Answer:

Ecologists use survivorship curves to visualize how the number of individuals in a population drops off with time. In order to measure a population, ecologists identify a cohort, which is a group of individuals of the same species, in the same population, born at the same time.

The higher the survivorship of an organism, the higher the fitness of the organism

What is survivorship ?

The term survivorship refers to the ability of an organism to live long in its habitat and reproduce. This is related to the fitness of an organism which is its ability to survive to the next generation.

Hence, the higher the survivorship of an organism, the higher the fitness of the organism and vice versa.

Learn more about survivorship: https://brainly.com/question/9904853

Which description is correct for both oogenesis and spermatogenesis?
The cells have 46 chromosomes until meiosis II is completed.
O After meiosis I, the cells have 23 chromosomes.
O Part of meiosis I is completed before birth.
The entire process takes about 70 days.

Answers

Answer: after meiosis l, the cells have 23 chromosomes

Answer: b

Explanation:

What is the entire object shown in the image?

A cell with a nucleus and other structures is shown.
prokaryote
eukaryote
chloroplast
mitochondrion

Answers

Answer:

Eukaryote

Explanation:

a eukaryotic cell

Answer: Eukaryote

Explanation:

Carbon moves in the ___ by wildfires
o Hydrosphere
o Atmosphere
o Biosphere
o Geosphere

Answers

It’s atmosphere :) bc I’m 100% sure it is right.

SOMEONE HELP WILL GIVE BRAINLIEST ANSWER

Which of the following suggests what happens when a mutation occurs in an organism? Select one:
Genes begin to appear in different individuals of the population all at once.
The organism develops new traits as a result of using a particular body part.
New traits appear from changes in the instructions given to the cell by the DNA. Useless traits are removed from the organism due to the loss of nucleotides​

Answers

Answer:

New traits appear from changes to the DNA..

Explanation:

A mutation is when DNA is changed or altered in some way, causing it to tell the cells to do something different from what they usually do such as growing a body part a certain way, or making skin regenerate a certain way. some mutations are specific to one individual person or thing, other mutations are passed down through generations and become a new normal for the species. new diseases such as viruses are often caused by the virus mutating...this is how we have so many different strains of the flu...

I need help so pls help me ?

Answers

B …………………. Number 2 …….

I got 12.25/16.00 (76.56%)


my mom got angry TvT

Answers

Answer:

Well, Im proud of you. :)

Answer:

look at the bright side you passed mate

if humans began hunting and driving the great barracuda to extinction how would this affect the ecosystem (answer should discuss biodiversity, food webs, and food chains)

Answers

Answer:

Generally considered to be the tertiary consumers (top level of the food pyrmaid), barracuda feed on an array of preys including grunts, groupers, snappers, small tunas, mullets, killifishes, herrings, and anchovies. By feeding on these marine organisms, barracuda prevent them from increasing in number.

Now let's barracuda's number starts decreasing due to hunting and other reasons. This will result in other primary and secondary consumers to increase in population. An increase in the number of primary and secondary consumers in the food chain will result in a decreasing number of plants, i.e. the number of producers decreases. Hence, this will negatively affect other connected food chains in the marine food web.

Explanation:

There are the same amount of carbon atoms on Earth now as there were in the past, but there are more in the atmosphere ever before. What explanation do you have for this?

Answers

The global average atmospheric carbon dioxide in 2019 was 409.8 parts per million (ppm for short), with a range of uncertainty of plus or minus 0.1 ppm. Carbon dioxide levels today are higher than at any point in at least the past 800,000 years.The carbon cycle describes the process in which carbon atoms continually travel from the atmosphere to the Earth and then back into the atmosphere. Since our planet and its atmosphere form a closed environment, the amount of carbon in this system does not change.

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