Answer:
exchange O2 and CO2 gases.
Explanation:
The respiratory system's main function is to exchange oxygen and carbon dioxide gases within the body. The organs that make up the respiratory system include the nose, pharynx and larynx, the trachea, bronchi, and the lungs. Each of these organs help with the process of breathing and/or the exchanging of gases within them.
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Which describes one of the ways proteins behave in facilitated diffusion?
Answer:
They create channels.
Explanation:
Brainliest please?
Autotrophs, such as plants, use light to make their own food. What happens to the light absorbed by a plant during photosynthesis?
Answer:
When light energy reaches the pigment molecules, it energizes the electrons within them, and these electrons are shunted to an electron transport chain in the thylakoid membrane.
Explanation:
During photosynthesis, light absorbed by plant is used for energizing electrons for an electron transport chain to take place in thylakoid membrane.
What is photosynthesis?Photosynthesis is defined as the process by which plants and other photosynthetic organisms convert the light energy in to chemical energy through the process of cellular respiration.
Some of the energy which is converted is stored in the form of molecules of carbohydrates like sugar and starches which are made up of from carbon dioxide and water . Photosynthetic organisms which can perform photosynthesis are algae and cyanobacteria. Photosynthesis is largely responsible for producing and maintaining the percent of oxygen in earth's atmosphere.
The process begins with proteins absorbing light energy which are called reaction centers and have a green pigment which is called chlorophyll . In plants ,these pigments are present inside organelles which are called chloroplasts while in bacteria they are present in plasma membrane.
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describe the organization of skeletal muscle at tissue level
The organization of skeletal muscle at tissue level is made up of:
• Epimysium; around the muscle belly.
• Perimysium; surrounding the muscle fascicles.
• Endomisium; coating the muscle fibers, which in turn, are made up of myofibrillar structures.
The muscle cell or fiber is the structural and functional unit of muscle tissue. The skeletal muscle tissue has a striated appearance.
Muscle fibers are organized in bundles surrounded by an outer connective tissue membrane, called the epimysium.
Very thin septa of connective tissue start from this, which are directed towards the interior of the muscle, dividing it into fascicles, these septa are called perimysium.
Each muscle fiber is surrounded by a very thin layer of reticular fibers, forming the endominsium.
The connective tissue holds the muscle fibers together, allowing the contraction force generated by each individual fiber to act on the entire muscle, thus contributing to its contraction.
Therefore, we can conclude that the organization of skeletal muscle at tissue level of the striated muscle fibers is given by the connective tissue that is organized in: Endomysium, Perimysium and Epimysium.
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What is the inputs and outputs of a nutrient cycle ?please explain
Answer:
Output of nutrients from ecosystems can also occur through surface flow of water and soil erosion. However, loss of nutrients from one ecosystem may represent input to other ecosystems. Output of organic matter from terrestrial ecosystems constitutes the majority of nutrient input into stream ecosystems.
Explanation:
how are nucleotides joined together from the dna chain
Answer:
Nucleotides are joined together by covalent bonds between the phosphate group of one nucleotide and the third carbon atom of the pentose sugar in the next nucleotide. This produces an alternating backbone of sugar - phosphate - sugar - phosphate all along the polynucleotide chain.
Explanation:
If a pollen tube does not grow from the pollen grain during gymnosperm reproduction, which of the following would be the most likely outcome?
The pollen would only be able to fertilize eggs inside the same cone.
The pollen would not be able to reach the eggs inside the female cones.
The pollen would then require a moist environment to swim to the egg.
The pollen would instead be dispersed to female cones by wind.
Answer:
The pollen would not be able to reach the eggs inside the female cones.
Explanation:
CAN SOMEONE PLEASE HELP ME WITH THIS SCIENCE QUESTION THANK YOU !!
Answer:
D
Because you need a lot of feed for livestock to gain weight for slaughter
6.Prokarytes differ from eukaryotes by
Select one:
O a. enclosing their DNA in a nucleus.
O b. by having mitochondria.
O c. by being multicellular.
O d. by having the DNA in the nucleoid area.
Answer:
a. enclosing their DNA in a nucleus.
Explanation:
Prokaryotes in general have no membrane bound organelles. The cells are enclosed in a plasma membrane though .
Write the names of all the six nutrients mentioned in the text?
5. There is a layer of extrusive rocks in the diagram, how did it get there? What event happened?
Answer:Extrusive rock, any rock derived from magma (molten silicate material) that was ... By contrast, intrusive rocks are formed from magma that was forced into older rocks at ... Encyclopaedia Britannica's editors oversee subject areas in which they have ... from intrusive rocks on the basis of their texture and mineral composition
Explanation:
The presence of a layer of extrusive rocks is due to a single volcanic eruption and its presence in the middle of a rock formation may be because these rocks are younger than the surrounding rock formations.
What are extrusive rocks?The presence of a layer of extrusive rocks in the middle of a rock formation refers to the geological history of the area. These rocks are formed from lava that has been erupted from a volcano and cooled quickly on the Earth's surface followed by the cooling at the surface of the Earth. This suggests that a volcanic event has occurred in the area.
When a volcanic eruption occurs, lava is ejected from the volcano and flows onto the Earth's surface followed by its solidification into extrusive rocks which have fine-grained texture.
The presence of extrusive rocks in the middle of a rock formation may be due to a single volcanic eruption or these rocks are often younger than the surrounding rock formations.
Therefore, the presence of extrusive rocks is due to a single volcanic eruption and may be younger than the surrounding rock formations.
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Describe the famous experiment related to gravity that Galileo may have performed. Include the results. Also, state whether the results support the law of gravity. Explain your answer.
Answer:
Galileo performed a famous experiment where he used a ball rolling on a ramp (inclined plane) to study the motion of objects under the influence of gravity. The ramp allowed him to make more precise measurements because the ball moved more slowly along the ramp than if it were simply dropped. Galileo discovered through this experiment that the objects fell with the same acceleration, proving his prediction true, while at the same time disproving Aristotle's theory of gravity (which states that objects fall at speed proportional to their mass). Galileo's conclusion from this thought experiment was that no force is needed to keep an object moving with constant velocity. Newton took this as his first law of motion. One result of the experiment surprised Galileo, and one surprises us. Galileo found that the heavy ball hit the ground first, but only by a little bit. Except for a small difference caused by air resistance, both balls reached nearly the same speed. And that surprised him. According to history, Galileo’s experiment on falling bodies largely contributed to Isaac Newton’s Law of Gravity. In Galileo’s experiment, he is said to have dropped balls from the Leaning Tower of Pisa. The balls were made of the same material but had different masses. Galileo set out to prove that the time it took for these objects to reach the ground would be the same. Galileo proved that objects reached the ground at the same time.
Explanation:
A P E X
Which of the following is the most efficient substance to complete cellular respiration?
on
a.sugars
b.fats
c.proteins
d.nucleic acids
Which of the following goals is the U.S. Integrated Ocean Observing System (OOS) not intended to address?
a increase understanding of the oceans
b. improve ocean safety
c. promote ocean ownership
d. enhance the economic output of the oceans
Answer:
C. Promote ocean ownership.
Explanation:
The IOOS is a partnership between federal, regional, and private agences to:
- increase understanding of our oceans and coasts
- improve safety
- enhance the economy
From ed 2020 APES notes.
Answer:
c.
promote ocean ownership
Explanation:
Ocean Exploration
Edge 2020
Which of these would you be doing if you are interacting with the geosphere?
A) rock climbing
B) swimming
C) riding in an airplane
D) sailing
Answer:
A) Rock climbing
Explanation:
The geosphere of the Earth includes all of its solid parts - the rocks, minerals, and landforms of its surface and interior. If we know this, we can conclude that the activity that involves interaction with the geosphere is rock climbing. Rocks are a part of the geosphere, and as we attempt to climb them, we are interacting with them.
Swimming and sailing are examples of interaction with the hydrosphere.
Riding in an airplane is an example of interaction with the atmosphere.
Does the order of amino acids in a protein matter?
O Yes
Ο Νο
Answer:
yes it does
Explanation:
Egg and sperm cells are ______; when fertilization occurs, the resulting offspring are _____. A. gametes; haploid B. haploid; diploid C. haploid; clones D. gametes; clones
Answer: B. haploid; diploid
Explanation: Egg and sperm cells contain a single set of chromosomes and are known as haploid. Haploid is having a single set of unpaired chromosomes in a cell or nucleus. A diploid is a cell or nucleus containing two complete sets of chromosomes, one from each parent.
Aerobic respiration has 3 stages: glycolysis, Kreb's cycle, electron transport
chain. What happens in each stage? How many ATP molecules made during
each stage?
What happens in each stage?
GLYCOLYSIS: "In glycolysis, glucose—a six-carbon sugar—undergoes a series of chemical transformations. In the end, it gets converted into two molecules of pyruvate, a three-carbon organic molecule. In these reactions, ATP is made, and NAD+ is converted to NADH." (Khan Academy)
KREB'S CYCLE: "This is a central driver of cellular respiration. It takes acetyl CoA—produced by the oxidation of pyruvate and originally derived from glucose—as its starting material and, in a series of redox reactions, harvests much of its bond energy in the form of NADH, FADH2, and ATP molecules. The reduced electron carriers—NADH and FADH2—generated in the TCA cycle will pass their electrons into the electron transport chain and, through oxidative phosphorylation, will generate most of the ATP produced in cellular respiration." (Khan Academy)
ELECTRON TRANSPORT: "In the electron transport chain, electrons are passed from one molecule to another, and energy released in these electron transfers is used to form an electrochemical gradient." (Khan Academy)
How many ATP molecules made during each stage?
GLYCOLYSIS: 2 ATP
KREB'S CYCLE: 2 ATP
ELECTRON TRANSPORT: 34 ATP
Khan academy is the best for breaking down processes in chemistry! I used khan all the time when I had trouble understanding chemistry last year.
Hope this helps! Please correct me if im wrong!
What geological feature can be
created by a divergent boundary?
A. Mountain chains
B. Volcanoes
C. Earthquakes
D. Mid-ocean ridge, rift valleys
1 and 3 are the correct answers
The genetic diversity is the same as species diversity. True or False
Answer:
False
Explanation:
Genetic diversity is diversity among members of a species. Species diversity is the diversity of species in a particular area or region. Genetic diversity is what makes each of us different, while species diversity would be like a nationality.
If the population of rats in your community is doubled, what effect would
this have on the resources of the community?
Answer:
The community would be out of resources
Explanation:
the doubling of the rat would surely affect the resources of the community.
Which of the following is the largest structure
in the animal cell?
A Vacuole
OB. chloroplast
C cell wall
OD nucleus
Thank you ❤️
Answer:
D. nucleus
Explanation:
The nucleus typically occupies 8% of the total cell volume.
Jackie is 84 years old. He was born on February 29, 1936. How many actual birthday’s has he celebrated? (SHOW YOUR WORK!) pls help! i will mark brainliest also :)
Answer:
Well if we wanted to be literal, people celebrate birthdays when they are actually born since that's the point of a birthday, but he's celebrated 83 if memory came into play.
Explanation:
please help!! I need help with this punnet square :( the mom’s eyes will be brown and the dad’s eyes will be brown
Which of these are natural events that change ecosystems?
-flood, pollution, deforestation
-earthquake, overpopulation, fire
Answer:
Wind, rain, predation and earthquakes are all examples of natural processes which impact an ecosystem. Humans also affect ecosystems by reducing habitat, over-hunting, broadcasting pesticides or fertilizers, and other influences
Explanation:
Answer:
earthquake is the natural events that change ecosystems
Explanation:
flood pollution, deforestation , overpopulation and fire are all man made.
How does the introduction of invasive species such as the brown tree snake upset the stability of the legal system
Answer:
Invasive species compete for the same natural resources such as food and water which the native species also need for survival.
Explanation:
Invasive species upset the stability of the ecosystem because the prey in their new environment does not have the needed defense against them. They also upset the food chain, consume so much, and overpopulate in the new territory thus causing the extinction of the native species.
The introduction of brown tree snakes in Guam disrupted the ecological system as their population increased rapidly because their preys in this new environment lacked the ability to defend themselves against the brown tree snakes. For this reason, more than twelve native birds in the Guam Islands went into extinction. They also consumed the natural resources needed for the survival of the native species.
Explain How does DNA direct the cell's activities, such as making proteins DNA stays inside the nucleus?
Answer:
Explanation: The nucleotide sequences that make up DNA are a “code” for the cell to make hundreds of different types of proteins; it is these proteins that function to control and regulate cell growth, division, communication with other cells and most other cellular functions. ... This process is called protein synthesis.
In one to three sentences, describe what happens during the reduction stage of the Calvin cycle
Answer:
ATP and NADPH transfer chemical energy to 3-PGA.
Glyceraldehyde 3-phosphate (G3P) is created.
G3P is used to make sugar.
Explanation:
edge 2020
i'm just different
During the reduction stage of the Calvin cycle, the 3-PGA molecules produced by carbon fixation are transformed into simple sugar molecules – glucose.
In this step, the energy is supplied by the ATP and the NADPH produced during the light-dependent photosynthesis reactions.
ATP, or NADPH, is used to transform the 3-PGA molecules into three-carbon sugar molecules (G3P molecules). The name “G3P” comes from the fact that NADPH gives electrons to, or breaks down, a 3-carbon intermediate to form G3P.
Carbon dioxide in the atmosphere undergoes a redox reaction to glucose. This redox reaction requires the total reduction of CO2 using the electrons available in the oxidation of the NADPH. Thus, the dark reactions are a redox pathway. Calvin-Benson cycle.
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If I put a potato in ammonia (a base) then the activity of catalase will increase / decrease / stay the same because
If I put a potato in ammonia (a base) then the activity of catalase will decrease because the pH level will be to basic for any catalytic (catalase) activity.
Hope this helps! Please correct me if I'm wrong :)
If I put a potato in ammonia (a base) then the activity of catalase will decrease because the pH level will be to basic for any catalytic (catalase) activity.
What is catalase?An enzyme called catalase causes (catalyzes) the process by which hydrogen peroxide is broken down into water and oxygen.
Catalase, which is widely distributed in organisms that live in the presence of oxygen, inhibits the buildup of peroxide, which is continuously created by multiple metabolic reactions, and shields cellular organelles and tissues from harm. Catalase is primarily found in the liver of mammals.
Therefore, If I put a potato in ammonia (a base) then the activity of catalase will decrease because the pH level will be to basic for any catalytic (catalase) activity.
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The figure shows four stages of a telomere shortening. What is the correct sequence of stages from youngest to oldest?
A.
1, 3, 2, 4
B.
3, 2, 1, 4
C.
3, 4, 1, 2
D.
2, 1, 4, 3
Answer:a
Explanation:
Answer:
a
Explanation:
Choose all the answers that apply.
Which of the following factors are determining factors in a biome?
sunlight
wind speed
air pollution
temperature
rainfall
You can chose multiple.
Answer:
-temperature and rainfall
Explanation:
Terrestrial biomes are defined as regions of similar vegetation and climates. Certain types of vegetation have specific growth requirements for their optimal water and temperature. They tend to thrive within regions where these needs are met, thus making up the dominant plant types.
At or close to the equator, biomes are warmer due to the high intensity of sunlight (the equatorial regions the most sunlight), and warmer air holds more moisture, making the regions more prone to rainfall.
Answer:
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Explanation:
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