a chemical reaction plants use to create food
Why does the bronchioles get smaller and smaller before they reach the alveoli?
Answer: Parasympathetic stimulation causes bronchoconstriction while sympathetic stimulation causes bronchodilation. During an asthma attack, the muscles that encircle the airway tighten or constrict, limiting the flow of air to and from the lungs.
Explanation: i hope this answers your question and i have a awesome marvelous day.
Answer:
In your lungs, the main airways (bronchi) branch off into smaller and smaller passageways -the smallest, called bronchioles lead to tiny air sacs (alveoli)
the bronchiole end in tiny air sacs called alveoli, where oxygen is transferred from the inhaled air to the blood, after absorbing oxygen, the blood leaves the lungs and is carried to the heart, the blood then is pumped through your body to provide oxygen to the cells of your tissues and organs.
Before 1896, many scientists concluded that light could not pass through black paper. In 1896, Henri Becquerel observed that uranium salts could cause a plate covered by black paper to react as if light had reached it. How did this observation affect conclusions about light passing through black paper?
A- Scientists ignored Becquerel’s evidence because uranium is dangerous to use, so his study was not valid.
B- Scientists repeated Becquerel’s experiment until it no longer worked and reported that his conclusions were not valid.
C- Scientists had to revise their earlier conclusion because evidence from Becquerel did not support the original conclusion.
D- Scientists stood behind the earlier conclusion that black paper blocks light because it was already an accepted conclusion.
Answer:
D
Explanation:
So, I mean it’s kinda hard to explain given that it just makes sense and I took the test and I was right soooooooo
Yeah
Scientists stood behind the earlier conclusion that black paper blocks light because it was already an accepted conclusion. Therefore, option (D) is correct.
What happens to light on the black paper?A sheet of black construction paper would obstruct light when you tried to shine a flashlight through it. The other side would not be able to see the light, and it would not be reflected. A black item absorbs all light waves and transforms them into heat, which causes the object to warm up.
Uranium, according to Henri Becquerel's theory, would absorb light and reemit it as x-rays. The uranium was placed on photo plates by him. When the plates were developed, he saw that the uranium had in fact been generating radiation resembling x-rays.
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Describe the force of Earth’s gravity.
Answer
Gravity, also called gravitation, in mechanics, the universal force of attraction acting between all matter. ... On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth's mass exerts on them. Gravity is measured by the acceleration that it gives to freely falling objects.
How many grams of water can be heated from 20.0 oC to 75oC using 12500.0 Joules? The specific heat of water = 4.186 joule/gram °C
Answer:
The correct answer is - 0.054 kg
Explanation:
Given:
change in temperature: 55°C
Heat energy = 12500 J
specific heat = 4.186
Formula:
The formula for Heat Energy is given by:
Q = mcp∆T
here: Q - Heat Energy
m is for mass
cp is for specific heat
∆T is a change in temperature,
Solution:
From formula,
m = Q/ cΔT
Mass = 12500 / (55 × 4200)
= 0.054 kg or 54 g
(3)
2.1
2.2
23
Provide labels for structures A, B and
State THREE functions of D
Fertilisation usually takes place at Y. Why wil
a blockage at X
2.3.1 Prevent fertilisation at Y
2.3.2 Not necessarily lead to infertity
(2)
3. Study the graph below which shows the menstrual
cycle and the influence of the different hormones on
it.
Answer:
i am pro i am pro i am pro i am pro
Why does warm air always rise at a front?
____________ are made of a series of paired statements that describe physical characteristics of different organisms.
Answer:
taxonomic key
this is A series of paired statements that describe the physical characteristics of differnent organisms.
Answer:
taxonomic key
Explanation:
A series of paired statements that describe the physical characteristics of differnent organisms.
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NO LINKS NO LINKS NO LINKS
The immune system is the body's defense against infectious organisms and other invaders. Your immune system works by recognizing the difference between your body's cells and alien cells, allowing it to destroy anything that could be potentially harmful. Active and passive immunity play an important role in keeping you healthy.
What is the difference between passive and active immunity? (SC.912. L.14.52)
A. Naturally acquired active immunity occurs when the person is exposed to a live pathogen, develops the disease, and becomes immune while naturally acquired passive immunity occurs during pregnancy, in which certain antibodies are passed from the maternal into the fetal bloodstream
B. Both passive and active immunity are interchangeable
C. Passive and active immunity are both 1st line of defenses
D. Passive immunity occurs when a person is exposed to a virus and active immunity occurs when the immunity is passed on through breast feeding
Answer:
The answer would be A
Question 3 If you had more time or better resources, how could you improve your model to eliminate some of these weaknesses?
Explanation:
I tried to answer but I dont know what you mean im sorry
2. A hormone that is produced by the endocrine system targets specific
cells ir many different parts of the body. Which of the following
mechanisms explains the best way for the hormone to efficiently reach all
of its target cells?
The hormone is released into the bloodstream where it can be carried throughout the
body to the target cells with specific receptors
The hormone reacts with neurons close by that signal the target cells throughout the
body
The hormone is transported by local regulation to cells close by that trigger the target
cells
The hormones moves throughout all the cells until it reaches the cells with the
specific receptors for the signal
Hurry please I’m taking a exam
Answer:
The correct answer is the first option:-
The hormone is released into the bloodstream where it can be carried throughout the body to the target cells with specific receptors.I learnt in biology that hormones are transported through blood so they reach the specific receptors and act upon them so am sure this is the answer!.
The other options aren't right for the question.
What are the two factors that determine the boundaries of a biome?
altitude
temperature
precipitation
latitude
Answer:
A. altitude
and
D. latitude
Explanation:
hope this helps! :D
The two factors that determine the boundaries of a biome are temperature and precipitation, which are the second and third options, as they help to shape the unique features of each biome.
What is the significance of the precipitation and temperature?Temperature plays a key role in determining the type of vegetation, such as in colder regions where low temperatures limit the types of plants that can grow, while in warmer regions the growth of tropical rainforests is seen. Precipitation plays an important role too, as in areas with high levels of precipitation, such as tropical rainforests, dense vegetation is seen, and in dry regions with low levels of precipitation, deserts are seen.
Hence, the two factors that determine the boundaries of a biome are temperature and precipitation, which are the second and third options, as they help to shape the unique features of each biome.
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Which is one piece of information that fossils in samples from Earth’s crust reveal about Earth’s history?
Answer:
a
Explanation:
Answer:a
Explanation:its on the quiz
I need help on this plzzz
Answer:
they all stay but move 1 and 5 .. 1 goes to 4 and 5 goes to 1
Is a forest area that has been washed away by a flood a primary or secondary area of succession?
Answer:
I'm pretty sure it's secondary
Explanation:
Secondary succession is a major disturbance such as a fire or a flood
Why are shape, weight, mass, size,
and texture NOT considered properties?
Answer:
Density is an intensive property. This means that regardless of the object's shape, size, or quantity, the density of that substance will always be the same. ... It is because density in an intensive property of matter. So they are not considered properties.
Explanation:
explain the importance of capacity to living organisms
All organisms must regulate by turning genes on and off in different cells at different times.
a. True
b. False
Answer:
a. True
Explanation:
The genome can be defined as the complete set of genetic information of an organism which is responsible to produce all the biological components required to carry out its metabolic functions (i.e., development, growth, reproduction, etc). These genes are transcriptionally expressed to produce mRNAs which are subsequently used to synthesize specific proteins (i.e., enzymes and structural proteins) by the process of translation. All organisms (i.e., either unicellular or multicellular organisms) exhibit specific gene expression programs by which such genes are regulated over time. Within the cell, gene regulation is essential to carry out biological processes ranging from development and differentiation to cell cycle arrest. These gene expression programs are acutely regulated via genetic (e.g., transcription factor binding) and epigenetic (e.g., DNA methylation) mechanisms, which work together in order to turn on/off genes during development.
What are some functions of the Thalamus.
Answer:The thalamus is a small structure within the brain located just above the brain stem between the cerebral cortex and the midbrain and has extensive nerve connections to both. The primary function of the thalamus is to relay motor and sensory signals to the cerebral cortex
Explanation:
FAKE ANSWERS WILL GET REPORTED.
PLEASE HELP !!!! ILL GIVE BRAINLIEST !!!
PLEASE HELP !!!! ILL GIVE BRAINLIEST !!!
PLEASE HELP !!!! ILL GIVE BRAINLIEST !!!
PLEASE HELP !!!! ILL GIVE BRAINLIEST !!!
Answer:
a.
Explanation: i had this in a social studies test before its a
Answer:
IN my opinion, it should be B
Explanation:
A student completes an SAE where they volunteer time taking care of animals at an animal shelter. What type of Immersion SAE would this be?
Explanation:
probably, Placement, since he's volunteering
The type of the Immersion SAE would be experimental research. The correct option is C.
What is Immersion SAE?
Immersion SAEs are an extension of the Foundational SAE's Agricultural Literacy component and will contribute to a student's growth in all Foundational components in an authentic, contextualized manner.
In a real-world application, the five Immersion SAE categories build on the Foundational SAE components.
SAE programs serve several important purposes and provide numerous benefits, including:
Assisting students in clearing career as well as educational decisions. Allowing students to investigate various agricultural subjects.Assisting students in developing self-confidence.The Immersion SAE would be an experimental study. The majority of SAE programs are completed outside of regular class time, either at home or at work.
Thus, the correct option is C.
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After a signal binds to a signal receptor, the next step is transduction. Why is the signal transduction step necessary ls7c week 1
Answer:
Signal transduction is what allows cells to respond to the influences of the environment around them, providing cells with proper growth and normal cell function.
Explanation:
Living organisms have developed a wide variety of complex processes to transmit signals from the outside to the inside to elicit an adequate cellular response. Defects in these molecular pathways can lead to very different disorders, such as diabetes, cancer, and psychotic illnesses. Signal transduction is the process by which a cell converts a certain signal or external stimulus into another signal or specific response, that is, it is the mechanism by which a cell responds to the stimuli it receives from the environment through diffusion. of those signals to its internal compartments. First, a signaling molecule (also called a ligand) needs to activate a specific receptor on the cell's membrane or cytoplasm. Ligand-receptor binding is very specific; they are recognized as a key and a lock. Second messengers are molecules that allow the received signal to be amplified at the intracellular level. The binding of a ligand to the receptor can generate hundreds of second messenger molecules that, in turn, can modify thousands of effector molecules and give rise to different responses. Cells recognize, integrate, and respond to multiple signals from their environment due to signal transduction, providing cells with a normal cell function.
What causes more rain to fall on one side of a mountain than the other side?
Answer:
as the air moves up the windward side of a mountain
Explanation:
it cools and volume decreases.As results
humidity increases an orographic clouds and precipitation can develop
B. What is the mass number and charge of the emitted positron?
Mass number:
Charge:
Answer: A positron or antielectron is the antimatter counterpart to an electron. A positron has the equal or same mass as an electron and a spin of 1/2, but it has an electrical charge of +1.
Explanation:
How do scientist study evolution?
explain the following type of respiration with diagram in toad:
1..Buccal respiration
2..Cutaneous respiration
3.. Pulmonary respiration
Answer:
1.Buccal pumping is "breathing with one's cheeks": a method of ventilation used in respiration in which the animal moves the floor of its mouth in a rhythmic manner that is externally apparent.
2.Cutaneous respiration, or cutaneous gas exchange, is a form of respiration in which gas exchange occurs across the skin or outer integument of an organism rather than gills or lungs.
3.Pulmonary ventilation is commonly referred to as breathing. It is the process of air flowing into the lungs during inspiration (inhalation) and out of the lungs during expiration (exhalation.
Yan Lang po Sana makatulung
Received information is called a transduced signal because: _________.
a. it is then converted into other chemical forms.
b. it is then converted into other electrical forms.
c. this process often has many steps of information conversion.
d. it is then converted into other chemicals during metabolism.
e. many different molecules form a signaling cascade.
Answer:
The correct answer is - e. many different molecules form a signaling cascade.
Explanation:
Signal transduction is the number of events that take place inside the body of a human from the external atmosphere to transmitting a chemical or physical signal through a number of molecular events of signaling cascade.
The transmission of the particular chemical or physical signal is caused a sequence of phosphorylation events inside the cell it involves specific protein receptors and different types of molecules.
13. Which of the following shows the correct relationship between warm
ocean water and its movement? *
Answer: B
Explanation:
The following that shows the correct relationship between warm ocean water and its movement is:
A. The density increases and the movement risesWarm ocean water is the condition in which the temperature of the ocean is warm. This in turn affects climatic conditions as it also has an effect on the marine ecosystem.
As a result of the temperature, warm water usually stays at the horizon of the ocean and when there is a joining of the cold water and the warm water, then there is a change in density as it increases while the movement of the water rises.
This phenomena occurs as a result of convection and the movement changes because warm water is less dense. The Indian Ocean is the warmest ocean in the world.
Therefore, the correct answer is option A
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during which time frames was there the greatest rate of change in atmospheric C02 concentration
Answer:
7000 PPM
Explanation:
7000 PPM i'm pretty sure
What does a population pyramid represents?
A
a population’s trophic levels
B
a population’s age-sex structure
C
a population’s growth rate
D
a population’s dispersal pattern
Answer:
B: a population’s age-sex structure
Explanation:
A population pyramid is a way to visualize two variables: age and sex.
They are used by demographers, who study populations. A population pyramid is a graph that shows the distribution of ages across a population divided down the center between male and female members of the population. Expansive pyramids mean that the population does not increase much in total number and has many young people.
Hope this helps! Info from National Geographic, I would trust it if I were you!
help i’m lost i have no clue what this is