Answer:If you were a single-celled organism and you lived in a nutrient-rich place, staying alive would be pretty straightforward. For instance, if you were an amoeba living in a pond, you could absorb nutrients straight from your environment. The oxygen you would need for metabolism could diffuse in across your cell membrane, and carbon dioxide and other wastes could diffuse out. When the time came to reproduce, you could just divide yourself in two!
However, odds are you are not an amoeba—given that you're using Khan Academy right now—and things aren’t quite so simple for big, many-celled organisms like human beings. Your complex body has over 30 trillion cells, and most of those cells aren’t in direct contact with the external environment.^1
1
start superscript, 1, end superscript A cell deep inside your body—in one of your bones, say, or in your liver—can’t get the nutrients or oxygen it needs directly from the environment.
How, then, does the body nourish its cells and keep itself running? Let's take a closer look at how the organization of your amazing body makes this possible.
Explanation:
can you help me explain the relationships between these terms photosynthesis, chlorophyll, thylakoids, chloroplasts
Answer:
In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle.
Hope this helps!
Explanation:
Brainliest?
Answer:
Photosynthesis occurs in the chloroplasts, chloroplasts capture light energy, thylakoids can be found inside chloroplasts, where light-dependent reactions occur, chlorophyll is found in the thylakoids, chlorophyll absorbs light energy, and chlorophyll is what makes plants look green.
pls help me plsssssss
Which organism is an annual?
sequoia tree
pea plant
moss
fern
Answer:
b
Explanation:
i took the test
What is the most important topographic feature of the ocean floor? Why?
Answer:
hi
Explanation:
The important features are the extensive continental shelves less than 250 m deep (pink); the vast deep ocean plains between 4,000 and 6,000 m deep (light and dark blue); the mid-Atlantic ridge, in many areas shallower than 3,000 m; and the deep ocean trench north of Puerto Rico (8,600 m).
The offspring of a particular cross are 100 percent heterozygous for the trait of plant height. What were the most likely genotypes of the parents? Tt ´ tt Tt ´ Tt tt ´ tt TT ´ tt
Answer:
TT x tt
Explanation:
If the offspring of a particular cross are 100 percent heterozygous for the trait of plant height. the most likely genotypes of the parents is TT and tt.
HETEROZYGOUS:Heterozygosity is a condition in which the genotype of an individual consists of two different alleles of a gene.
According to this question, a gene coding for plant height is involved. The tall allele (T) is dominant over the short allele (t).
This means a heterozygous offspring will have the following genotype: Tt. This genotype will only arise totally i.e. 100% in the offsprings if the parents are both homzygous for the trait i.e. TT and tt.
Learn more about heterozygosity at: https://brainly.com/question/10261919
what is one way that energy is transferred within an Earth system.
three different ways are convection, conduction, and radiation
how the structures of the different chambers and vessels of the heart relate to their functions.
Answer:
Explanation:
The heart can be found at the center of the chest, underneath the sternum in a thoracic compartment. It is made up of four chambers and several valves that regulate the normal flow of blood within the body.
Two chambers called atria are located in the upper portion of the heart and receive oxygen-free blood. The valves that separate these chambers are called atrioventricular valves which is composed of the tricuspid valve on the left and the mitral valve on the right.
On the other hand, ventricles are chambers found on the lower portion of the heart; they pump oxygen-enriched blood into all organs of the body, reaching even the smallest cells. Similar to the atria, the ventricular chambers are also separated by valves. Collectively-termed as semilunar valves, these are comprised of the pulmonary and aortic valve.
The heart also has a wall that is composed of three layers: the outer layer epicardium (thin layer), the middle layer myocardium (thick layer), and the innermost layer endocardium (thin layer). The myocardium is think because it is made up of cardiac muscle fibers.
The structure of the heart is made more complex because of the mechanisms that allow blood to be distributed throughout the body and to return into the heart. Facilitating this continuous process are two types of blood vessels: veins and arteries (16jacktwinwritters). The vessels that bring oxygen-free blood back into the heart are called veins; those that bring oxygen-rich blood away from the heart and to other body parts are called arteries. Functioning in the left ventricle, the largest artery is called aorta. The aorta is considered a main artery in the body. It further splits into two smaller arteries called common iliac arteries.
With regular functioning, the heart is continuously able to supply sufficient amount of oxygen to all parts of the body.
The model shows how pimples are formed in the skin. Why do you think this process can occasionally lead to pain?
A. The swollen pimple completely stops blood flow to the area, starving the nerves. B. The bacteria replication leads to swelling, which irritates nerves in the dermis.
C. The nerves around the pore cannot transmit an action potential, so they can’t send signals.
D. The pimple presses on the epidermis, which is where all the sensory receptors in the skin are located.
Answer:
The bacteria replication leads to swelling, which irritates nerves in the dermis Explanation:
so B is your answer
hope this helps you
Answer:
The bacteria replication leads to swelling, which irritates nerves in the dermis
Explanation:
plato
Where do plants get the nitrogen they need to create amino acids and DNA?
Answer:Assimilation - This is how plants get nitrogen. They absorb nitrates from the soil into their roots. Then the nitrogen gets used in amino acids, nucleic acids, and chlorophyll.
Explanation:
what molecule makes a trunk to a tree sturdy
Answer:
Cellulose
Explanation:
In botany, trunk refers to the main wooden axis of a tree that supports the branches and is supported by and directly attached to the roots. The molecule that makes it sturdy is . Dead cellulose particles make trunk more strong.
I need help!!!!!
Explain why the hormone produced by the endocrine gland will not communicate with the non target cell
Cellulose is a type of
A. protein
B. carbohydrate
C. grass
D. lipid
B Because Cellulose is a polysaccharide consisting of linear chain of numerous linked D-glucose units whereas proteins are formed of number of amino acids linked together by peptide linkage.
Cellulose is a polysaccharide and a structural component of the plant cell. It is a carbohydrate made of many monomers linked together. Thus, B is the correct option.
What is cellulose?Cellulose is an organic chemical that is insoluble in water and is a tough structure classified as carbohydrates. Cellulose is a structural component of plant cells.
It is made by monomer units linked by the beta-1,4 glycosidic bonds and is a biodegradable, tasteless organic compound with the chemical formula (C₆H₁₀O₅)ₙ.
It is the main component of the plant cell wall that provides support and shape due to its fibrous structure. It is made of linear chains of D-glucose units that makes the polysaccharide.
Therefore, option B. cellulose is a carbohydrate.
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What is Kingdom Monera?
Answer:
Monerais a kingdom that contains unicellular organisms with a prokaryotic cell organization (having no nuclear membrane), such as bacteria.They are single-celled organisms with no true nuclear membrane (prokaryotic organisms).
Explanation:
Complete the following analogy. Plant is to dermal tissue as animal is to ______ tissue. a. connective b. epithelial c. muscle
Answer:
Your answer is Muscle 100%
Explanation:
Dermal tissue means:
Controls materials moving in and out of the PLANT.
Muscle tissue means:
Made of fibers and pushes blood throughout an ANIMAL'S body
both of them both say the last anology they belong to, if that makes sense.
Have a Blessed day, ;3
Answer:
B. Epithelial
Explanation:
Both protect the organs.
Hope it helped!
Geothermal electricity-generating plants are located in regions that often have
droughts
heat waves
volcanoes
tornadoes
Answer: volcanoes
Explanation: geothermal electricity- generating plants are most commonly located around the Ring of Fire, which is a hotspot for volcanoes.
Geothermal electricity-generating plants are located in regions that often have volcanoes. The correct option is c.
What is geothermal electricity?Deep below, hot water is pushed under strong pressure through a well. Therefore, the pressure decreases as the water reaches the surface. When water becomes steam.
A turbine that is connected to an electricity-generating generator is spun by steam. Electricity is produced by geothermal power plants by harnessing the thermal energy of the planet.
The steps that must be taken are as follows.
Deep below hot water is pushed under strong pressure through a well.The creation of thermal energy involves heating water and forcing it through a turbine.It is then transformed into electricity.A generator that aids in the generation of energy is activated by the steam rotating the turbine.Therefore, the correct option is c. volcanoes.
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The organelle responsible for cellular respiration is the:
a) Mitochondrion
b) Chloroplast
c) Lysosome
d) Nucleus
Answer:
A. Mitochondrion
Explanation:
The enzymatic reactions of cellular respiration begin in the cytoplasm, but most of the reactions occur in the mitochondria. Cellular respiration occurs in the double-membrane organelle called the mitochondrion.
Answer: a) mitochondrion
Explanation:
Cellular respiration occurs in the double membrane organelle called mitochondrion
PLEASE HELP
explain how a gis can model the ways that changes in climate can influence human activity
Answer: a Gis helps locate areas where temperatures are high or erratic in comparison to global averages which can help show global warming as well
GIS aids in the identifying the places where temperatures are unusually high or irregular and influences human activity about changes in climate.
What is GIS?"A Geographic Information System (GIS) is a computer program that analyses and displays information that is geographically referenced." It uses data which it gets from the device that have enabled its location.A GIS helps us in gaining a scientific understanding of earth systems on a large scale, allowing us to make more careful and calculated decisions.What is climate?"The long-term weather pattern in a certain location is referred to as climate."Long-term shifts in temperature and weather patterns are referred to as climate change.Hence, GIS tells about the prevailing climatic condition of an area.
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7. What types of stored energy do resting skeletal muscle fibers contain?
Answer:
I believe the answer would be ATP, but I am not sure
Please help! ASAP AND THANK YOU!
Answer:
C
Explanation:
it is because the source of the energy is the stove's burner, and it is not from the cooking pot. The cooking pot only absorb the heat from the stove's burner to make sure the vegetables is well-cooked
PLEASE HELP ME I WILL MARK BRAINLY IF CORRECT!!!!
A student rests his right ear against his desk while a
teacher taps lightly on the desk. The student can hear the
tapping sound only through his right ear. When he lifts his
head away from the desk, he hears nothing.
What is the medium of the sound waves the student hears?
A. The air
B. The student
C. The desk
D. The teacher
Answer:
The desk
Explanation:
the desk is the answer because the sound wave is propagating through the solid bench.
Hope this is right.,,
Which macromolecule is known to be hydrophobic?
Carbohydrates
Lipids
Proteins
Nucleic Acids
Which effects would many organisms likely experience if global warming occours check all that apply
Disrupted food webs
Increased competition
Increased number of glaciers
Disrupted life cycle events
Forced relocation
Answer:
A. disrupted food webs B. increased competition D. disrupted life-cycle events E. forced relocation
Hydrogen + Chlorine Dot Structur
which kind of metamorphosis is depicted in fiaure B?
Answer:
I don't remember. Sorry :(
Explanation:
Answer:
The kind of metamorphosis in fiaure B is a complete metamorphosis.
Explanation:
Complete Metamorphosis refers to a metamorphosis consisting of 4 complete stages
How is genetic variation passed to offspring?
Answer: through somatic cells or inherited through the germaine.
Explanation: My best guess
Enzymes tend to not work in extremely hot temperature because?
A) they evaporate into the air
B) the substrates become denatured
C) the enzyme becomes denatured
D) both b and c
Answer:
C
Explanation:
In a paramecium, the nucleus divides first and then the cytoplasm divides, forming two identical daughter cells. Which type of reproduction takes place in paramecia?
Answer:
This type of reproduction is called binary fission.
Explanation:
Binary fission is a type of reproduction in paramecium that involves producing two identical daughter cells from one mother cell. These daughter cells are called clones, and are not genetically distinct from their progenitor. No genetic exchange is involved and they are genetically indequingishable.
The resulting DNA is identical to the original copy and newly copied chromosomes separate into two identical daughter cells with the same chromosome number. All offspring remain identical.
7. What is pollen? *
The reproductive cells of an animal
The reproductive cells of vertebrates
The reproductive cells of plants
None of the above.
Answer:
The reproductive cells of plants
NEED HELP PLEASE ALOT OF POINTS
6. Use the following terms to complete the statement: resilient, resistant If an ecosystem is _____________ was just still working can you check where she is copypasta hi Gigi what asked you i like, it is generally stable unless drastically changed by a disturbance. When a The disturbance causes a change, the ecosystem quickly recovers when it is _____________
Explanation:
Resistant means it can withstand changes, so I suppose the 1st blank
Resilient means it can recover quickly, so the 2nd blank
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Which of the following statements regarding the moon is correct
Answer:
it in the sky at night and it orbits around earth
Answer: The moon's surface exhibits volcanic activity.
Explanation: