Which statement is true about a cell?








A.
The smallest living things are cells.







B.
All known living things are made of multiple cells.







C.
Cells stop producing once adulthood is reached.







D.
Organs produce cells.

Answers

Answer 1
Cells are the smallest living thing.

So, option A is your answer.

Hope this helps!
Answer 2
A.
The smallest living things are cells.

Good luck!

Related Questions

Organisms use different types of adaptations to aid in their survival.Which of the following is an adaptation that would not help a lion to catch its prey? a. group hunting b. hyoid bone adapted for roaring c. camouflage d. keen eyesight

Answers

B wouldnt help them catch prey because it doesnt increase mobility speed or concealment.

Answer;

B. hyoid bone adapted for roaring

Explanation;

Many organisms are well adapted to their living and non living factors due to physiological, behavioral or structural adaptations which increases the organisms chances of survival and reproduction.

Behavioral adaptations are responses made by an organism that help it to reproduce  or survive.Physiological adaptations are body processes that helps an organism to survive or reproduce Structural adaptations are features of an organism’s body that helps it to survive or reproduce

In our case, Lion has many adaptations that help it survive and help it catch its prey, these include, group hunting, camouflage and keen eye sight, however, presence of hyoid bone adapted for roaring does not help it in catching its prey.

Why does incomplete dominance not support the blending theory of inheritance?

Answers

Incomplete dominance can happen in flowers such as snap dragons where a red flower plant and a white flower plant have an offspring that is neither red nor white but is a mix so in this case it would be pink. It does not support the blending theory as it does not get its colour from the dominant plant in this case but from both.

why do plants need both chloroplasts and mitochondria

Answers

Final answer:

Plants need both chloroplasts and mitochondria because chloroplasts are responsible for photosynthesis, while mitochondria are the site of cellular respiration. Chloroplasts convert sunlight into chemical energy, specifically glucose, whereas mitochondria break down glucose to release energy for the plant's activities.

Explanation:

Plants need both chloroplasts and mitochondria because they play complementary roles in the plant's energy metabolism. Chloroplasts are responsible for photosynthesis, the process by which plants convert sunlight into energy-rich molecules like glucose. Mitochondria, on the other hand, are the site of cellular respiration, where glucose is broken down to release energy for the plant's activities.

Chloroplasts contain pigments like chlorophyll that capture sunlight and convert it into chemical energy. This energy is used to produce glucose through the process of photosynthesis. The glucose is then stored as starch or used immediately by the plant for growth and other metabolic activities.

However, glucose alone cannot provide all the energy needed by the plant. This is where mitochondria come in. Mitochondria are known as the powerhouse of the cell because they produce more energy in the form of ATP through cellular respiration. They break down glucose and other organic molecules to release energy that is used by the plant to perform various functions like reproduction, growth, and repair.

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Final answer:

Plants need both chloroplasts and mitochondria because they serve different functions in the cell: chloroplasts carry out photosynthesis to produce glucose, while mitochondria carry out cellular respiration to convert glucose into ATP. These two processes work together to provide plants with energy.

Explanation:

Plants need both chloroplasts and mitochondria because they serve different functions in the cell. Chloroplasts are responsible for carrying out photosynthesis, a process that converts light energy into chemical energy in the form of glucose. On the other hand, mitochondria are responsible for cellular respiration, a process that converts glucose into ATP, the energy currency of cells. These two organelles work together to provide plants with the energy they need to grow and carry out essential metabolic processes.

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Select the FALSE statement below about the structure of myoglobin.

a. The O2-binding pocket of myoglobin contains several nonpolar amino acid sidechains that can interact favorably with a nonpolar molecule of O2.

b. The polypeptide of myoglobin provides a pocket for O2 to fit, and stabilizes the bound O2 via hydrogen bonding with the distal His.

c. The polypeptide of myoglobin protects the heme iron from oxidation.

d. The active site of deoxy myoglobin is 5-coordinate with a histidine occupying one axial position while the other axial position is left open for oxygen binding.

e. Myoglobin has a single polypeptide chain so it has 1o, 2o, 3o and 4o structure.

Answers

The answer is e. Myoglobin has a single polypeptide chain so it has 1o, 2o, 3o and 4o structure.

Myoglobin is an iron and an oxygen binding protein. It has a single polypeptide chain. Proteins with the single polypeptide chain cannot have quaternary (4o) structure. 4o structure of proteins includes an arrangement of multiple folded polypeptide chains (subunits) in a multi-subunit complex. Therefore myoglobin cannot have 4o structure as the single chain polypeptide. All other choices are correct.

What process powers the movement of tectonic plates?

Answers

Continental drift is the process that powers the movement of tectonic plates. The movement of magma can also attribute to this movement as well.
The convection currents set up in the magma under the plates power the movement of the tectonic plates.

Some studies have indicated that our eyes naturally travel from bottom left to top right, so putting the diagonal along that path can take advantage of our eye patterns.


True ort False?

Answers

This is true

If you put the diagonal along that path, this will help the photography form seeming split to people. You can also use it to exploit it and make people focus on other parts of the photo by making their pattern go differently while seeming as if it is going regularly.

Answer:

True

Explanation:

I just got 100% on this quiz

Gradpoint

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Experiments in warmer waters have reported as much as a 50% decline in biomass in habitats that experienced
A. a 6-degree Celsius decrease in water temperature.
B. a 6-degree Fahrenheit decrease in water temperature.
C. a 6-degree Celsius increase in water temperature.
D. a 6-degree Fahrenheit increase in water temperature.

Answers

C 6 degree Celsius increase in water temperature

Answer:

C. A 6-degree Celsius increase in water temperature.

Explanation:

Took the Module 1 Exam.

When bacterial cells participate in conjugation, the bridge between the cells through which dna passes is

Answers

that bridge is called "pilus" provided by F+ bacteria.

What is the endosymbiotic theory? (Cells)

Answers

The endosymbiosis theory explains how eukaryotic cells may have evolved from prokaryotic cells. Symbiosis is a close relationship between two different organisms.Later, a host cell engulfed a prokaryotic cell capable of photosynthesis. This is where the chloroplast and other plastids originated.

Tsunamis are caused by _______. a. underwater volcanoes b. El Niño c. underwater earthquakes d. global warming

Answers

Tsunamis are caused by "Underwater Earthquakes" 

So, Option C is your answer! Hope this helps!
C is the correct answer

The body tissue that connects the muscle to the bone is called

Answers

Tendon is a fibrous connective tissue that attaches muscle to bone

Answer:

The answer is: Tendons.

Explanation:

Tendons are fibrous connective tissue that joins muscles to bones. They can also attach muscles to structures such as the eyeball. Tendons serve to move the bone or structure, while the ligaments are the fibrous connective tissue that joins the bones together and generally their function is to join structures and keep them stable.

The answer is: Tendons.

How are natural selection and microevolution illustrated in this scenario?

Answers

HIV uses the enzyme reverse transcriptase to synthesize DNA from its RNA genome. It lacks the mechanism for correcting errors made while synthesizing the genome.

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When the cell excretes sodium from within, against the natural tendency of matter, it is performing

Answers

When the cell is removing and or excreting sodium from within the cell, against the natural tendency of matter, it is performing a type of active transport, called exocytosis, I believe. The sodium ions become associated with membrane enclosed structures called vacuoles, from the Golgi apparatus and later merge with the cell membrane of the cell to dispose the sodium carried within the vacuoles.

The large intestine absorbs most of the ________ from the food and some vitamins and minerals.

Answers

The large intestine absorbs most of the nutrients from the food and some vitamins and minerals.

Hope this helps! ^-^

water im [pretty sure because when i answered nutrients it was wrong

There are many methods used to obtain energy for use in our daily lives. Some of these methods have possible environmental consequences to rivers, groundwater, and organisms. One type of pollution involves excess carbon dioxide being released into the air. Some of the carbon dioxide reacts with water to form acid rain. Which energy sources can release carbon dioxide and carbon monoxide waste into the atmosphere?

Answers

Answer: Coal,petroleum

Explanation:

he process that we call "burning" actually is chemical reactions with oxygen in the air. For the most part, the carbon combines with oxygen to form carbon dioxide (CO2), and the hydrogen combines with oxygen to form water vapor (H20).

Some  of the carbon dioxide reacts with water to form acid rain, and the energy sources can release carbon dioxide and carbon monoxide waste into the atmosphere through the burning of fossil fuels, coal, oil, etc.

What is the significance of burning fossil fuels?

Carbon dioxide, which is also considered a "greenhouse gas," and other greenhouse gases in the atmosphere trap heat from the sun but never let the heat pass through the earth's atmosphere and make the earth hot. This is caused by the combustion of fossil fuels and causes air pollution, which can be harmful to human health and the earth.

Hence, some of the carbon dioxide reacts with water to form acid rain, and the energy sources can release carbon dioxide and carbon monoxide waste into the atmosphere through the burning of fossil fuels, coal, oil, etc.

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1.Compare the natural greenhouse effect with the human-induced process.


2.What are the greenhouse gases? Which one is the biggest concern?


3.What are scientists doing to collect data?


4.What role does the carbon cycle play in this problem?


5.What are the political and economic factors that complicate this problem?


6.Why is the study of global warming so scientifically complicated?


7.Are there skeptics of global warming? What are their arguments?

Answers

1. The greenhouse effect is useful. Without it we would all freeze to death on an earth with no atmosphere. Research has shown that the level of greenhouse gases in the air drop and rise as a natural cycle. However, human induced activities has made the amount of gg in the atmosphere rise to an natural amount. This is due to: cars, the industrial revolution in 19th century etc. 

2. Water vapour, carbon dioxide, methane, nitrous oxide and ozone which occurs naturally. CO2 is the one which is currently the biggest concern as it is increasing the most. 
3. Scientist melt ice containing bubbles of air from millions of years ago and compare it with today to see this is natural. 

4. We cut down trees which photosynthesise and is the only process to remove CO2 from the air. 

5. It is not always economically viable for the government to issue a clean air act which could help reduce problems. They are unwilling to spend money. 

6. Global warming happens naturally as well as global cooling so scientists are not sure if it is us or not. 

7. Yes there are. They say that our activities can't possibly be contributing to global warming that much, though it has been suggested that something like this caused extinction of dinosaurs years ago.

In a food web, arrows poinet in just one direction beacsue the show what?

Answers

It shows that flow of energy in the ecosystem is "Uni-directional" means energy flows only in one direction never reverse

Hope this helps!

How was the the Hershey chase blender experiment conducted?

Answers

Final answer:

The Hershey-Chase blender experiment led by Hershey and Chase involved radiolabeling T2 bacteriophage DNA with 2P and proteins with 5S. They demonstrated that DNA, not protein, is the genetic material as radioactive DNA was found inside bacterial cells and the genetic information was used to produce new viruses.

Explanation:

The Hershey-Chase blender experiment was a crucial study in molecular biology, conducted by Alfred Hershey and Martha Chase, to determine whether DNA or proteins were the genetic material responsible for heredity. Hershey and Chase used T2 bacteriophage, a virus that infects bacteria, for their experiments. They grew the viruses in cultures containing radioactive isotopes: 2P for DNA and 5S for proteins, since DNA contains phosphorus but no sulfur and vice versa for proteins. The viruses thereby incorporated these isotopes into their DNA or proteins, respectively.

Two separate sets of E. coli bacteria were then infected with the radiolabeled phages. After allowing the phages to attach to the bacteria, the mixtures were placed into a blender to separate the phage coats from the E. coli cells. The mixtures were then centrifuged, so the heavier bacteria formed a pellet, and the lighter phage particles and detached coats remained in the supernatant. In the set with 5S-labeled proteins, the radioactivity was found in the supernatant, indicating that the protein did not enter the bacteria. Conversely, in the set with 2P-labeled DNA, the radioactivity was detected in the pellet, indicating that the DNA entered the bacteria and therefore was the material responsible for directing the production of new phage particles. Thus, Hershey and Chase concluded that DNA is the molecule that carries genetic information.

What is combustion and how does ir affect the carbon cycle?

Answers

Combustion is the burning of a substance. It could be complete or could be incomplete. It changes the form of carbon and so it plays it's role in cycle

Which of the following blood vessels uses elasticity to push blood further along the bloodstream?

Arteries
Capillaries
Varicose veins
Atrioventricular node

Answers

The answer is Arteries 

Arteries carry oxygen-rich blood from the heart to capillaries. On the contrary, veins carry blood without oxygen from the capillaries to the heart. 
Arteries are very flexible and yet strong blood vessels so that efficient transport of oxygen-rich blood along the bloodstream through the organism is enabled.

Answer:

The answer is A. Arteries

Explanation:

Which of the following statements about seafloor spreading is false?

A. Continents move as the seafloor spreads along a mid-ocean ridge.
B. The oldest crust is closest to the mid-ocean ridge.
C. Magma rises through the mid-ocean ridge, forming basalt.

Answers

B. The oldest crust is closest to the mid-ocean ridge.
Answer;

B. The oldest crust is closest to the mid-ocean ridge.

Explanation;Seafloor spreading refers to the process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves away from the ridge. Seafloor spreading occurs at the mid-oceanic ridge where the divergent boundaries cause two plates to move away from each other resulting to the spreading of the sea floor.As the divergent plates move apart, new materials wells up and then cools at the edge of the plates. Seafloor spreading is important as it helps explain the continental drift in support of the theory of plate tectonics.

why is the smooth muscle cell shaped the way it is? ...?

Answers

Smooth muscle cells are contractile and will contract from many different agents such as hormones travelling in the blood and neurotransmitters from the autonomic nervous system. The smooth muscle cells are coupled together so that when one cell contracts, the contraction is relayed to the next. This contractile ability is important in the vascular system as it helps regulate blood pressure by changing the size of the lumen of the vessel. 
This contractile feature also enables the movement of food through the digestive tract. Rhythmic contractions of smooth muscle cells, called peristalsis, moves the food along.

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Is blood sugar regulated by positive or negative feedback?

Answers

Blood Sugar regulates by negative feedback in order to keep the body in Homeostasis. 

Which does not affect the quality or pattern of cloth as it is woven on a loom?
speed of weaving
type of thread used
how the loom is threaded

Answers

I think the answer is how the loom is threaded.
Im sorry but the correct answer here is the first option: Speed of weaving because the question is which does NOT affect. How the loom is threated and the type of thread used are important factors. The speed is not 

one way organisms interact is through competition what do organisms compete for

Answers

Food. Habitat. Anything to keep them alive, basically.
Organisms compete for food, water, territory, and dominance.

The coyote (canis latrans) is found across North America which makes it a specialist species.
true or false

Answers

The coyote (canis latrans) is found across North America which makes it a specialist species. Its false

its super False broooooo

What is the main source of energy that drives the water cycle?

Answers

The sun is the main source of energy.
Final answer:

The sun is the primary source of energy that drives the water cycle. It provides the heat necessary for evaporation, the initial phase of the water cycle, and influences all subsequent stages of the cycle including condensation, precipitation, and surface runoff.

Explanation:

The main source of energy that drives the water cycle is the Sun. The sun's energy warms the oceans and other surface waters, which leads to the evaporation or sublimation of liquid or frozen water into the atmosphere. This water vapor then condenses into clouds, leading to precipitation that brings the water back to Earth's surface again, completing the water cycle.

Evaporation and sublimation are critical first steps in the water cycle. These processes involve the transformation of liquid water or ice into water vapor due to the Sun’s heat.

The water, now in a gaseous state, ascends into the atmosphere where it eventually condenses to form clouds due to lower temperatures at higher altitudes. This is referred to as condensation and it's often followed by precipitation, the process where water is returned to the Earth’s surface as rain, sleet, hail, or snow.

Upon reaching the surface, the water can take several paths. It can flow on the surface, leading to surface runoff, or it can seep into the soil contributing to subsurface water flow. Some of the water ends up in rivers and streams, referred to as streamflow, and eventually makes its way back to the ocean again, completing the cycle.

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I only have two questions, thank you! One difference between a point mutation and a chromosomal mutation is that ____
A. A point mutation affects the DNA of more genes than a chromosomal mutation
B. A point mutation can involve a insertion or deletion, but cannot result in a frameshift.***
C. A chromosomal mutation can change the number of chromosomes in a cell.
D. A chromosomal mutation is more likely to be passed on to offspring or daughter cells.
A mutation that involves one or a few nucleotides is called ____.
A. A mutagen B. An inversion C. A point mutation*** D. A translocation Thanks so much for your help! Happy Holidays! :)

Answers

For the first question the answer would be B. 
For the second question the answer would be D. I am not 100% on this but its my best guess. 

Answer:

1. The most appropriate answer would be an option C.  

A point mutation refers to the mutation or change that occurs at only one or a few nucleotides of the DNA.

Usually, a single nucleotide is substituted with the wrong nucleotide due to which only a single codon is affected.

However, it can cause frame shift mutation if insertion or deletion of nucleotide takes place.

In contrast, in chromosomal mutation long segment of DNA is involved. It may involve one or more genes. It mainly includes insertion, deletion, translocation, and inversion.

In addition, chromosomal mutation can cause change in the number or sets of chromosomes such as poliploidy, aneoploidy et cetera

2. The correct answer would be C. A point mutation

A point mutation refers to the mutation or change that occurs at only one or a few nucleotides of the DNA.

When errors occur in dna what activity do checkpoint controls inhibit

Answers

Checkpoint controls inhibit further progression through the cell cycle, preventing further DNA synthesis of DNA that has errors. 

Where do most earthquakes originate?
1) within Earth's core
2) along specific belts within the crust
3) randomly across the entire Earth's surface evenly spaced along the Moho interface

Answers

2) along specific belts within the crust
The best and most correct answer among the choices provided by your question is the second choice or number 2.

Most earthquakes originate along specific belts within the crust.

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