Organisms cannot make their own food without
cell membranes
cell walls
chloroplasts
Vacuoles
Answer:
The correct answer is - chloroplasts
Explanation:
Plants or autotrophs contain exceptional organelles considered chloroplasts that traps light and use it to use carbon dioxide and water into sugar and oxygen. Living organisms without chloroplasts can not make their own food.
Chloroplasts look like oval, flat circles. Like mitochondria, they also have two membranes. The whole organelle encased by the outer membrane. The inner membrane contains stroma, a thick fluid, which makes up the vast majority of the chloroplast's volume. Dispersed all through the stroma are piles of empty plates called grana that contain chlorophyll, which traps sunlight based on the intensity for use during photosynthesis.
Answer:
what they said
Explanation:
1. El corazón se localiza en el __________________, que es el espacio comprendido entre ambos pulmones. 2. El ________________________ es la capa funcional del corazón, puesto que su contracción impulsa la sangre hacia los pulmones y los demás tejidos. 3. Internamente el corazón presenta 4 cavidades: 2 cavidades superiores llamadas _________________ y dos cavidades inferiores conocidas como ________________ . 4. Entre la aurícula y ventrículo del mismo lado se encuentran las válvulas auriculoventriculares. En el lado derecho tenemos la válvula _____________, mientras que en el lado izquierdo se encuentra la válvula ____________ . 5. El ciclo cardiaco comprende dos fases, una de contracción o __________________ y una de relajación llamada ___________________ .
Answer:
1. El corazón se localiza en el mediastino, que es el espacio comprendido entre ambos pulmones. 2. El miocardio es la capa funcional del corazón, puesto que su contracción impulsa la sangre hacia los pulmones y los demás tejidos. 3. Internamente el corazón presenta 4 cavidades: 2 cavidades superiores llamadas auriculasy dos cavidades inferiores conocidas como ventriculos . 4. Entre la aurícula y ventrículo del mismo lado se encuentran las válvulas auriculoventriculares. En el lado derecho tenemos la válvula tricuspide, mientras que en el lado izquierdo se encuentra la válvula mitral . 5. El ciclo cardiaco comprende dos fases, una de contracción o sistole y una de relajación llamada diastole.
Explanation:
El corazon es un organo con un tejido muscular liso especializado donde estas celulas musculares presentan uniones desmosomales de amplia conexion para la diseminacion rapida de señales, es asi como se producen contracciones ritmicas, autonomas y de manera simultanea.
El corazon a su vez presenta su auto irrigacion propia por medio de las arterias coronarias que se encargan de mantener el miocardo en buen estado de vitalidad.
Describe the purpose of a scientific investigation.
Answer: Scientific investigation is a quest to find the answer to a question using the scientific method. In turn, the scientific method is a systematic process that involves using measurable observations to formulate, test or modify a hypothesis.
defention of a bronchi
Answer:
this is the answer
Explanation:
(BRON-kus) A large airway that leads from the trachea (windpipe) to a lung. The plural of bronchus is bronchi. Enlarge. Anatomy of the respiratory system, showing the trachea and both lungs and their lobes and airways.
Why is Enviromental science is an interdisciplinary science
Regions of the body which require large surface area for absorption, such as the cells covering the inner surface of the small intestine, often have
Answer:
layers of cell membranes- micro villi
Explanation:
They are similar to cilia but shorter in length and diameter.They have average diameter of micrometer with average length of 2 micrometer
These are layers of cells membrane which protrudes or extended on the epithelial lining of the small intestine.They are microscopic in structure,and their major function is to increase the surface area of the small intestine for absorption of digested food substances. Therefore reducing volume while aiding the rapid movement of the digested food into the bloodstreams.
Aggregate of micro villi is called brush border on the surface of the small intestine. Their activity with the villi aids the increase in the surface area which leads to absorption of food substances
in polar habitat what a climate and adaptation of plant
this is the answer ofadaption of plants
Answer:u
Explanation:u used my question to get points without actually answering
Lynn is classifying objects based on the material they are made of. Which
object should be included in the following group: bookshelf, wooden crate,
and telephone pole?
A.disk drive
B.paper clip
C.coffee table
D.automobile tire
Answer:
coffee table because it is most likely wooden
Explanation:
Which unit would be most appropriate to describe the height of a house?
A.meter
B.centimeter
C. Megameter
D. Kilometer
Answer:
A.) meter
Explanation:
compare and contrast the cells of plant and animals
Answer:
Although animal and plant cells are surprisingly similar, most of the difference between them is in their organelles. For example, plant cells have all the organelles found in animal cells plus:
Cell wall - this is a cellular structure outside of the cell membrane that gives structure to the cell, so it can have rigidness and maintain its shape.Chloroplast - this organelle captures the energy from the sunlight and converts it into chemical energy.Vacuoles - (these are present in animal cells too but are very rare) this organelle is common in plant cells and store water, waste products, food, etc.What letter is pointing to the mitochondria?
The letter M is pointing towards the mitochondria.
Answer:M
Explanation:
what is the relationship between social science, natural science, physical science, chemistry, and physics?
Answer:
all are branches of science discovering about the world around us
Viruses are resistant to which of the following: all of the above, freezing,disinfectants,heat
Answer:
All of the above
Explanation:
Numerous virus can survive in extremely hot, freezing, extremely acidic, or extremely salty settings. Additionally, the viruses that infect such bacteria must be able to maintain their infectivity under adverse circumstances. Thus, option A, C, D is correct.
What are the unfavorable conditions for virus?Because they lurk inside cells, viruses present a significant challenge to the immune system of the body.
Antiviral drug resistance may appear as chronic or escalating viremia or illness despite treatment, due to prolonged antiviral drug exposure and continued viral replication brought on by immunosuppression.
When a virus ceases responding to an antiviral drug, it is said to have developed antiviral resistance. Antiviral medications become ineffective or altogether useless as the virus evolves.
Therefore, virus are resistant.
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You get home from school and grab a bag of potato chips before settling onto the couch to binge watch your newest Netflix series. A few hours later, you notice that all of the chips are gone and you feel very thirsty. You get up to go to the bathroom before grabbing a drink and notice your urine is exceptionally dark in color. Apply what you know about osmosis to explain what has happen to the cells in your body. Include the name for the type of solution the cells were in after eating and how the cells attempted to maintain homeostasis despite these salty conditions.
Answer:
Explanation:
Osmosis is the process in which the molecules of a solvent move from a region of low concentration to a region of higher concentration through a semi-permeable barrier.
While eating the chips, the salt content from the chips makes the surrounding solution of the cells to have an increase in salt concentration causing an hypertonic solution. An hypertonic solution is a solution that has more solute (salt) than the (solute in a) cell. This increase in salt concentration around the cells causes the cells to release water to neutralize the high salt concentration in the solution around the cell (in order to maintain homeostasis) which causes dehydration in the individual and hence making the individual to be thirsty. The body attempts to maintain balance by passing this excess salt out of the body in the form of urine hence the reason for the dark colour in the urine (because if the body doesn't rid itself of the high salt concentration, the cells could shrink and die as a result).
Please help me I am really struggling
Answer:
gamma rays hope this helps
Explanation:
2.
Which factor has the greatest influence on the
variety of species that survive in different regions
of a marine habitat?
A.
depth of light penetration
B.
daily fluctuations in temperature
C. size of predators
D. average annual rainfall
Answer:
depth of light penetration
Explanation:
light is important in marine habitat, the distribution of organism, density and the type of organism is determined by the depth of light, the energy and how well the light can travel because most of the organism depends on light.
Green Plants, some algae and cyanobacteria survive through the production of their own food via photosynthesis. Photosynthate produced through photosynthesis is what is transported from area of production to other plant part where it is needed.
Photosynthesis can not be achieved without light penetration because light is what supplies the energy needed for the reaction.
Marine habitat refers to the distribution of organisms, plants, and aquatic animals in the oceans, seas, lakes, and ponds.
The factors such as oxygen demand and light penetration play a crucial role in determining the type and distribution of organisms in the different regions of the habitat.
Light penetration affect the marine ecosystem as:
Plants are autotrophic organisms, as they carry out photosynthesis. They are the primary producers in the aquatic ecosystem. The plants need light to perform photosynthesis. Light is directly dependent on the distribution of food, as the predators require light to find the food or prey for their survival.
Thus, light penetration plays a crucial role in determining the variety and distribution of organisms at different depths.
The correct answer is Option A.
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Carbon is an essential element for life how does its atomic structure allow it to form so many different molecules
Answer:
This is because Carbon has four valence electrons (tetravalent) which gives it the ability to form up to four bonds differently with different elements/compounds. This gives rise to the creation of lots of compounds.
Carbon as an element also has atoms which fits into most substances thereby creating different possible compounds with others such as in carbohydrates, proteins, lipids etc. This is what makes Carbon an essential element for life.
Select all that apply.
Which of the following are current human uses for chordates?
therapy
entertainment
food
research
affection
Answer:
all of these is the answer
Answer:food
Explanation:
How do oceans play a part influencing our Earth systems?
Ocean currents act much like a conveyor belt, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics. Thus, ocean currents regulate global climate, helping to counteract the uneven distribution of solar radiation reaching Earth's surface.
Explanation:
Answer:
Well, it plays a part because it is our key to making our Earth called home... The earth is majority filled with water. It plays a part also by giving us water, and many much more things that require water...I can go on forever and say how it gives us food as well... if we never had water, we would never have veggies and crops to keep us alive...
Explanation:
(Don't take it from me... take it from Nature...)
We will be working with Escherichia coli, a bacteria that requires oxygen for growth. Very briefly describe the conditions needed to grow 5ml of liquid culture of E.Coli in the laboratory?
Answer:
The conditions required to grow of liquid culture of E. coli includes various aspects such as temperature, equipment, media, oxygen, and glassware. These aspects are describe as per requirement below:
1. Suitable temperature for E. coli is higher than room temperature should be maintain at 37 degree Celsius as it is inhibits the bacteria growth.
2. Autoclave helps in regulating conditions during growing period of bacteria whereas Laminar air flow provides sterilized environment during culturing or sub culturing E. Coli colony.
3. LB medium is suitable for liquid medium of E.coli which requires peptides, vitamins, trace elements and minerals and digested food as nutrients.
4. It is anaerobic bacteria so oxygen is not essential for culture however can grow in availability of oxygen.
5. Properly sterilized glassware obtained by placing it in Bunsen Burner's flame which is essential to avoid contamination.
It is okay to pick up broken glass with your bare hands as long as the glass is placed in the trash.
Answer:
Yes and no
Explanation:
It may be okay for if you are careful enough otherwise a cut may result to an infection.
No, it's not okay to pick up broken glass with your bare hands, as long as the glass is placed in the trash.
What are safety precautions?Safety precautions refer to routine actions like using equipment that is in good working order, wearing eye protection, cleaning up spills, having access to a first aid kit, etc.
To reduce the risk of injury, always pick up the shattered glass with a brush and dustpan, tongs, or forceps and drop it into a container intended for disposing of broken glass. Broken glass must never be handled with care and must never be thrown away with other garbage.
Therefore, no, you shouldn't pick up the shattered glass with your bare hands unless it has been disposed of. It can cause cuts and infections.
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What type of selection affects traits that influence an individual's chances to find a mating partner or be chosen as a mating partner?
Answer:
Sexual selection
Explanation:
It is sexual selection because it is a type of natural selection in which an organism or organisms acquire traits which help the individual to be choose as a mating partner or to have preference for a mating partner or for competition among one sex organisms in which a traits succeed.
Sexual selection can be intrasexual or or intersexual. Intrasexual is is competition between one sex of the same organism and intersexual is between sexes of different organism.
1. Which of the following is an example of a scientific theory?
A. The law of gravity
B.an explanation of how disease spreads
C.an untested hypothesis about the structure of DNA
D. E =mc2
Answer:
The answer is B.
Explanation:
This is because a scientific theory is similar to a explanation.
For lab, Brandy made a type of glowing liquid that she thought was really cool. The teacher instructed everyone to throw away the liquid in the trashcan, but Brandy decided to take the glowing liquid away in her water bottle so she could show her friends after school.
Which of the following rules did she break?
Rule 1:Students will not perform unapproved experiments oruse any equipment without prior instruction. Students will follow all of the instructions given by the teacher.
Rule 2: Students are not allowed in the supply room without permission. Students will not work on experiments when the teacher is not present.
Rule 3: Students will wear eye protection when needed.
Rule 4:Students will clean messes appropriately before leaving the lab room.
Rule5:Studentswillwearproperclothingduringexperiments.Noopenshoesandnodanglingjewelryareallowed. Long hair should be tied back.
Rule 6: Students will not eat, drink, or chew gum in the lab.
Rule 7: Students will not take materials from the lab without teacher permission.
Rule 8: Students will not horseplay or play practical jokes.
Rule 9: Students will keep their lab area free from non-laboratory materials.
Rule 10:Students will immediately let the teacher know about accidents, spills, and injuries.
Answer:.7
Explanation: becuse she took the equipment from the lab
Answer:
rule 7 i think
Explanation:
bc she took it without asking
describe in detail the function of an umbilical cord
Answer:
the umbilical cord is considered both the physical and emotional attachment between mother and fetus.
Explanation:
this structure allows for the transfer of oxygen and nutrients from the maternal circulation into fetal circulation while simultaneously removing waste products from fetal circulation to be eliminated maternally.
What are the 4 Kingdoms in the Eukarya Domain? A) There is only one. B) Protists, Fungi, Plants, Bacteria C) Protists, Fungi, Plants, Animals D) Protists, Bacteria, Archaea, Plants
frederick wanted to findout what soil works best for growing roses.he greq them in potting soil,clay,sand,he found outside his yard.After one week,he measured their height and how many leavesthey had. what is the independent, dependent, control and constant?
Answer: Independent Variable: type of soil
Dependent Variable: height of the growing roses
Control: Idk
Constants The rose
Explanation:
Independent Variable: type of soil, Dependent Variable: height of the growing roses, Control: other environmental conditions, Constants The rose.
What are experimental variables?
An eye-tracking experiment must include variables. Anything that may vary or be altered is a variable. To put it another way, it refers to any variable that may be altered, taken into account, or assessed in an experiment.
Different kinds of variables are used in experiments. We'll go through some of the most important categories of experimental variables, their definitions, and examples using each category of a variable.
Independent variables (IV): In an experiment, they are the elements or circumstances that you control. Your claim is that there is a direct relationship between this variable and the dependent variable.Dependent variables (DV): are the elements you see or quantify. You may see what happens to your dependent variable when you change your independent variable.
Therefore, Independent Variable: type of soil, Dependent Variable: height of the growing roses, Control: other environmental conditions, Constants The rose.
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How would pepsin activity be affected if it were put in a neutral solution?
Answer:
pepsin would either work at extremely slow pace or get denatured.
The activity of pepsin would be inhibited if put in a neutral solution.
Pepsin is one of the enzymes found in the gastric juice of the stomach. It is a protease that digests protein into polypeptides , which are intermediate products of protein digestion.
A neutral solution is a solution that contains hydrogen ions and hydroxide ions at equal concentration.
But Pepsin works best in an acidic medium which is provided by the hydrochloric acid secreted in the stomach.
Therefore when pepsin is put in a neutral solution, the activities would be inhibited.
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Suppose i needed to measure exactly 15.0 mL of water for an experiment. Which graduated cylinder would be the best one to use, and why?
Answer:
A test tube would be used
Explanation:
The test tube refers to a laboratory device that is made of graduated glass for which cylinder used to measure small quantities of liquids that is from 5 mL to 2 L. The most suitable type of specimen must be chosen for measuring the liquid volume, in this situation that is a 15 mL. The specimen is shutdown to lower and has a support base.
Therefore the correct answer is a test tube.
certain substances are placed in the beaker in given picture if the following items are placed in a water filled beaker then state in what condition it remain 1 gravel of the sand. 2 drop of sunflower oil? pls ans
Answer:
1. gravel of the sand: a part is dissolved and the remainder is grouped at the bottom of the beaker.
2. drop of sunflower oil: It is not absorbed and heaps on the surface of the water contained in the beaker.
Explanation:
Gravel of the sand is a polar substance. This means that this substance has the ability to dissolve and mix with water in a system in which both were placed together, such as a beaker, for example. However, the beaker limits the amount of water, which limits its ability to dissolve polar substances. Therefore, depending on the quantity, the gravel of the sand, when placed in a beaker with water, will dissolve, in parts, what is not dissolved will accumulate in the bottom of the beacker, because the gravel of the sand is denser than the water.
With the drop of sunflower oil the exact opposite happens. This is because drops of oil are nonpolar substances, which means that they do not have the ability to be dissolved in water. This means that when dropped into the beaker with water, the drop of sunflower oil will not dissolve, but will pile up on the water surface, because it is less dense than water.