A flap of tissue called the epiglottis sits over the top of the trachea. This flap blocks food and drink from going down into the trachea when you swallow. But in some cases, food or drink can enter the trachea. It may go down as you swallow.
Answer:
Larynx
Explanation:
Explain the process of how air flows through the Respiratory System? In three sentences.
Answer:
The respiratory system is a biological system consisting of specific organs and structures used for gas exchange in animals and plants. The anatomy and physiology that make this happen varies greatly, depending on the size of the organism, the environment in which it lives and its evolutionary history. In land animals the respiratory surface is internalized as linings of the lungs. Gas exchange in the lungs occurs in millions of small air sacs; in mammals and reptiles these are called alveoli, and in birds they are known as atria. These microscopic air sacs have a very rich blood supply, thus bringing the air into close contact with the blood. These air sacs communicate with the external environment via a system of airways, or hollow tubes, of which the largest is the trachea, which branches in the middle of the chest into the two main bronchi. These enter the lungs where they branch into progressively narrower secondary and tertiary bronchi that branch into numerous smaller tubes, the bronchioles. In birds the bronchioles are termed parabronchi. It is the bronchioles, or parabronchi that generally open into the microscopic alveoli in mammals and atria in birds. Air has to be pumped from the environment into the alveoli or atria by the process of breathing which involves the muscles of respiration.
Explanation:
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Explain how scientists use geologic time to determine the age of landforms.
geologic time use the layer of Rock to describe relationship of events and their sequence chronological order over the history of Earth the layering is a result of the buildingup tiny beats of rocks sediments or Lava cooling at the surface of many years think think of it like a stock of pancakes-the bottom layer is the one that was placed first and therefore is the oldest. the sediments that create the layer of the earth as said one or top of the other
Human activities have which type of impact on the environment?
a) positive
b) negative
c) neither a nor b
d) both a and b
What type of consumers are secondary consumers?
Answer:Tertiary consumers eat the secondary consumers and are usually carnivores (meat eaters).Secondary consumers are organisms that eat primary consumers for energy. Primary consumers are always herbivores, or organisms that only eat autotrophic plants. However, secondary consumers can either be carnivores or omnivores. Carnivores only eat other animals, and omnivores eat both plant and animal matter.
Explanation:
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NADP+ is converted into NADPH during the light-dependent reactions. Where does the hydrogen
come from?
plants experience _______ gravitropism when their stems move upward.
A. positive
B. negative
Answer:
Negative
Explanation:
Gravitropisms. Phototropism is a response to the stimulus of light, whereas gravitropism (also called geotropism) is a response to the stimulus of gravity . When the stem grows against the force of gravity (upwards), this is known as a negative gravitropism.
Answer:
negative
Explanation:
this is because negative gravitropism is when a plant grows away from gravity (like moving upwards). then, positive gravitropism is when the roots of a plant move grow downwards.
i hope this helps you!
vegetable seeds that do not germinate well after 1 or 2 years are classifed as
Answer:
yes
Explanation:
Photosynthesis
Regular sequence of growth and division that cells undergo.
A. cell cycle
B. Mitosis
C. Interphase
Answer:
Cell Cycle
Explanation:
Are chemosynthetic bacteria autotrophs or heterotrophs?
Answer:
autotrophs
Explanation:
they can produce thier own energy and whatnot without the need of an outside source such as the sun for example
What are proteins that are found on the surface of some red blood cells.
genes
alleles
antigens
immunoglobins
I don't understand what this is saying, could someone help to me better understand?
Write out the equation for photosynthesis (label the reactants and products, circle the waste products)
Answer:
6CO2 + 6H20 + (energy) → C6H12O6 + 6O2 Carbon dioxide + water + energy from light produces glucose and oxygen.
Explanation:
why nitrogen needs to be cycled around
the environment?
Answer:
nitrogen is an essential nutrient for sustaining life on earth, without it, plants would die, then herbivores due to starvation, and so on
Explanation:
which statement correctly describes greenhouse gases in the atmosphere?
Answer: It is a process by which greenhouse gases allow the sun’s light to penetrate the atmosphere but stop the heat from escaping.
Explanation:
Greenhouse effect is the natural heating of the Earth's surface due to the fact that the sunligth waves may penetrate the atmosphere and reach the solid surface, but when the sunlight waves return after reaching the solid surface, process that changes the wavelength of the sunlight, they cannot penetrate the greenhouse gases and so the heat is kept inside the atmosphere with the consequent increase of temperature.
Identify how scientists use radioactive isotopes by selecting the best answers from the drop-down menus.
Archaeologists use radioactive isotopes to
.
Scientists use radioactive isotopes in agriculture to
.
Geologists use radioactive isotopes to
.
Answer:
1. Archaeologist use radioactive isotopes to determine the ages of various objects, rocks and materials. This is called radioactive dating. Radioactive isotope Carbon-14 is widely used for this dating process.
2. Scientists use radioactive isotopes in agriculture to monitor or study the uptake and use of essential nutrients by plants from the soil. This helps to determine viability, productivity and nutritious ability of the plants on a piece of land.
3. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events. ... Atoms of the same element but with different number of neutrons are called isotopes of that element.
Answer:C: Determine the age of ancient artifacts.A: Understand the biological and chemical processes in plants.B: Determine the age of rocks and fossils.
Explanation:i got the answers right on the assignment.
One result of climate change is that ocean temperatures are increasing. If the temperatures continue to rise, what effect will that have on the oceans’ ability to retain CO2? How might this change affect the atmosphere? THIS IS SCIENCE WOULDNT LET ME SELECT IT
Answer:
See explanation
Explanation:
There is an equilibrium that exists between the carbon dioxide in the air and the carbon dioxide in the oceans. The temperature of the water affects its ability to hold carbon dioxide.
Hence, as the global temperature continues to rise and the water becomes warmer, its ability to hold carbon dioxide decreases. When this happens, the gas exchange across the air-ocean boundary is affected. There is now too much CO2 in the atmosphere owing to the disturbance of its air- ocean exchange equilibrium leading to more rise in temperature due to global warming.
What type of rock makes up these layers that help us study the history of the earth
Answer:
Sedimentary rocks
By studying sedimentary rocks from the Earth's crust, we can learn about the history of how Earth's surface has changed over time
Explanation:
Answer:
Sedimentary rocks is the answer
Explanation:
Fill in the numbers
please help me:( please
Answer:
1. F
2.T
3.F
Explanation:
Which the following is an example of commensalism
Please help
Answer: A is the correct answer.
Explanation: Since commensalim is when one organism benefits and the other neither benefits nor gets harmed, A would be the correct answer because the lice are using the flies for transportation, and the flies aren't getting harmed.
Please help me! 10 POINTS!
Answer:
both mass and velocity will increase
What happens during aerobic respiration? А Oxygen is produced. B Glucose is produced. С Lactic acid and oxygen are produced. D ATP, water and carbon dioxide are produced.
Answer:
Your answer is D).
How many reactions that occur in kreb cycle transfer electrons from substrate to an electron acccepting enzyme
Answer:
Four reactions that occur in kreb cycle transfer electrons from substrate to an electron accepting enzyme.
Explanation:
There is four such a response in which electron is transported from substrate to electron-allowing enzyme. In three of those, NAD+ is decreased to NADH and in one FAD decreases to FADH2. The TCA cycle is likewise recognized as the Krebs cycle after the signature of English biochemist Hans Kreb who illustrated the pathway in the 1930s.
Altos niveles de ATP en la célula son necesarios para realizar ciertas funciones vitales tales como reproducirse.A qué piensas que se deba esto
Answer:
el ATP es la moneda energética que la célula utiliza para llevar a cabo diversas funciones metabólicas (incluida la reproducción)
Explanation:
La adenosín trifosfato (ATP) es la principal fuente de energía para la mayor parte de los procesos celulares. La hidrólisis del ATP libera energía química almacenada en los enlaces de fosfato de la molécula, la cual es utilizada por la célula para llevar a cabo diversas funciones, incluida la reproducción. La hidrólisis de ATP genera en primera instancia adenosín difosfato (ADP) y un grupo fosfato libre (ortofosfato), esta es una reacción exergónica que libera una enorme cantidad de energía la cual es utilizada por la célula para llevar a cabo diversas funciones metabólicas incluyendo la síntesis de macromoléculas tales como, por ejemplo, proteínas del huso mitótico requeridas durante el proceso de división celular. El ADP también puede hidrolizarse para liberar energía, con la consecuente producción de adenosín monofosfato (AMP) y un segundo fosfato libre.
17. At the end of their biology unit, 7th grade students were asked to make a glossary of biological terms. Which student did the best job of defining the word "heredity"?
Answer:
The question is incomplete, I found a matching question online:
At the end of their biology unit, 7th grade students were asked to make a glossary of biological terms. Which student did the best job of defining the word "heredity"?
A) Kendall- Heredity is the study of chromosomes and the genes that they contain.
B) Carla- Heredity is the passing of genetic information contained in chromosomes from one generation to the next.
C) Joseph- Heredity is the study of human characteristics passed down from parent to offspring.
D) Devon- Heredity is the reason that tall parents will usually have tall children.
Answer:
The correct answer is:
Carla- Heredity is the passing of genetic information contained in chromosomes from one generation to the next. (B)
Explanation:
Heredity, also known as inheritance is the passing down of genetic traits and genetic information from parents to their offspring through reproduction (sexual or asexual), and this information is contained in DNA materials called chromosomes.
Carla's definition most appropriatly captures the context of genetics, while Kendall and Joseph rather defined "genetics", which is the study of heredity.
Devon did not give a definition, but rather an example.
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What are the possible effects of contaminated water on the health of an individual or community? Explain your answer in terms of what causes the contamination, the types of infectious agents involved in the related diseases, and how these diseases can spread. (5 points)
Answer:
Some possible affects of contaminated water on the health of an individual are, reproductive problems, gastrointestinal illness, cancer, and neurological disorders. Contaminated water can be caused by natural chemicals and minerals like radon, uranium, etc. Contaminated water could also be caused like wastewater releases or sewers overflowing. Some infectious agents involved in the related diseases would be bacteria, viruses, helminths and even protozoa. These diseases can spread through drinking the water, airborne, or just contact with the water or infectious agents.
Explanation:
Hope this helps :-)
Which goes where ? Mitosis Vs. Meiosis
Answer:
Mitosis, Meiosis, and both are written below
Explanation:
Mitosis: produces more somatic (body) cells, purpose is for healing and growing, the daughter cells are exact replicas
This is because mitosis occurs in body cells and is used for growth, so all the daughter cells are the same.Meiosis: results in sex cells (gametes), results in eggs and sperm, purpose is for creating new individuals (eventually), each daughter cell is different, has 2 separate division stages
This is because meiosis occurs in gametes and is used in reproduction.Both: Chromosomes need to replicate before the whole process begins, a form of reproduction
This is because both are reproducing (they are dividing) and DNA must be replicated so each daughter cell has it.Explain the role of carbon dioxide in photosynthesis?
Answer:
during the process of photosynthesis, cells use carbon dioxide and energy from the sun to make sugar moleculezs and oxygen..... then, via respiration processes, cells use oxygen and glucose to synthesize energy- rich carier molecules such as ATP, and carbon dioxide is produced as a waste product.
Explanation:
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How does a DNAmolecule produce copies of itself?
Explanation:
DNA replication is the process by which DNA makes a copy of itself during cell division. ... The separation of the two single strands of DNA creates a 'Y' shape called a replication 'fork'. The two separated strands will act as templates for making the new strands of DNA.
What happens to the chromosomes when a cell divides to make a copy of itself?
Answer:
the cell copies or replicates its chromosomes and then splits the copied chromosomes equally to make sure each daughter cell has a full set.
Answer:
Mitosis is used to produce daughter cells that are genetically identical to the parent cells. The cell copies or "replicates" it's chromosomes and then splits the copied chromosomes equally to make sure that each. daughter cell has a full set.
Explanation:
I majored in Biology
In the system used to classify all organisms, which of the following is true
(A) All groups have the same number of organisms.
(B) Organisms in the same group have similar characteristics.
(C) The largest groups have the most important animals.
(D) Organisms are placed in groups by how big they are.
Answer:
B is correct, Organisms in the same group have similar characteristics
Explanation: