Which of the following is a main difference between prokaryotic and eukaryotic cells?


A.eukaryotes are smaller than prokaryotes

B.eukaryotes do not have organelles

C.prokaryotic cells lack a membrane-bound nucleus

D.prokaryotes do not have ribosomes

Answers

Answer 1

Answer:

C

prokaryotic cell's DNA just floats around in a cluster


Related Questions

___ is the only continent not to experience tornadoes. Africa Antarctica America

Answers

antartica i think sorry if i’m wrong
Antarctica is the only continent not to experience tornadoes

Roots or plant growth making cracks in concrete mechanical or chemical weathering

Answers

the correct answer is mechanical weathering

Create a food chain that is 4 trophic levels using our desert ecosystem.  The food chain​

Answers


Level 1: Plants and algae make their own food and are called producers. Level 2: Herbivores eat plants and are called primary consumers. Level 3: Carnivores that eat herbivores are called secondary consumers. Level 4: Carnivores that eat other carnivores are called tertiary consumers.

When were the first pictures of the Milky Way taken?
Feedback the late 1800’s
the mid 1900’s
the late 1800’s
the early 1900’s
the early 1800’s

Answers

Answer:

the mid 1900’s

Explanation:

Milky Way is a galaxy that consists of our planet and the solar system and the first picture of the galaxy was taken from the Hubble space telescope in a black and white format and occurred on May 20, 1990. It appears to be a vague snowman as the picture was taken from a planetary camera.

Answer:

the late 1800's

Explanation:

i got it right on my test :)


A rock falling through Earth's atmosphere from outer space is called a


Answers

Explanation:

A rock falling through Earth's atmosphere from outer space is called a asteroid

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What three parts make up the modern cell theory?

Choose 3 answers:

(Choice A)
A
Cells can only come from other cells.

(Choice B)
B
Cells arise spontaneously.

(Choice C)
C
The cell is the building block of all living things.

(Choice D)
D
All organisms are made of one or more cells.

Answers

Answer:

d

Explanation:

all organisms are made of one or more cell

Question one - C

Question two - D

Question three - A

Why do mosquito bites itch?

Answers

Their saliva contains an anticoagulant and proteins. The proteins are foregin substances that triggers the body’s immune system. To fight them the body’s immune system releases histamine, a compound that helps white blood cells get to the affected area. Histamine is what causes the itchiness, inflammation, and swelling.

When adding more sucrose to a 0.7 M sucrose solution, why does it not dissolve as readily as it did at a lower molarity? a) the ions in the solution interact with the sugar and that interferes with its solubility b) the solubility of the solute depends on wether the solute has hydroxyl functional groups or not c) the solute molecules adhere to the polar regions of the water molecules so there is no room for more sucrose molecules d) hydrogen bonds in the water molecules change the electrical charge of the sugar molecule, which prevents it from dissolving further in the water

Answers

Answer:

The correct answer is option c.he solute molecules adhere to the polar regions of the water molecules so there is no room for more sucrose molecules

Explanation:

The Solution contains a solute (sucrose for this situation) and dissolvable (water for this situation). A saturation or unsaturation of a solution relying upon whether it can even now dissolve a solute or not.  

As indicated by this inquiry, the sucrose solution is saturated as the 0.7 M sucrose arrangement doesn't disintegrate the sucrose (solute) anymore. The immersion of the sucrose arrangement happens in light of the fact that the measure of solutes is likening the number of solvents in the solution. The solubility of a particular solution relies on saturation.

What is formed by a group of cells and tissues that work together to carry oul a specific function? O cell O tissue O organ O organ system​

Answers

Answer:

The answer is C: Organ

Explanation:

A single organ is made of tissue, which carries out a specific function, multiple organs carrying out multiple functions make them an organ system.

Organs are what is formed by a group of cells and tissues that work together to carry out a specific function.

LEVEL OF ORGANIZATION:

The level of organization of life describes the hierarchical pattern of life.

Cell is the basic and fundamental unit of life, hence, the simplest. Cells form tissues, tissues form organs, organs form organ systems and systems form organisms.

According to this question, a group of cells and tissues that work together to carry out a specific function is called organ.

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What limits most cells to a very small size?

Answers

-Surface area to volume ratio. (surface area / volume)
-Nucleo-cytoplasmic ratio.
-Fragility of cell membrane.
-Mechanical structures necessary to hold the cell together (and the contents of the cell in place)

Question 4 (1 point)
What process is being shown in this diagram?
HELP ME!

Answers

Answer:

exocytosis

Explanation:

“exo” means “out” or “outer”, and it appears that the red dots are moving outwards

How can I solve -10(-5)+3 someone give me an example:)

Answers

Answer:

the answer is 53

Explanation:

step 1: Multiply -10 and -5 together that will give you 50.

( it is positive because whenever you multiply or divide 2 negatives together it becomes a positive.)

Step 2: Then add the +3 to the 50

Step 3: final answer equals 53.

Answer:

53

Explanation:

−10(−5)+3

Multiply −10 and −5 to get 50.

50+3

Add 50 and 3

53

Plsss helppp 200 points extra

Answers

Answer:

fother Aa

mather aa

Explanation:

the top are not AA so that means the father is Aa because the ones below are aa

Answer:

father Aa

mother aa

Explanation:

The top are not AA so that means the father is Aa because the ones below are aa.

1.)_____ is an accepted explanation of an observed phenomenon supported by empirical data. Is it THEORY OR LAW?

Answers

Answer: Law

Explanation: I just did this test

Describe the functions of proteins in cell membrane.

Answers

Answer:

Membrane proteins can function as enzymes to speed up chemical reactions, act as receptors for specific molecules, or transport materials across the cell membrane. Carbohydrates, or sugars, are sometimes found attached to proteins or lipids on the outside of a cell membrane.

Which feature of a bacterial cell is attacked by many antibiotics?
cell membrane
cell wall
plasmids
cytoplasm

Answers

Answer:

cell wall

Explanation:

Which statement below would be most likely to effect the carbon cycle if a tornado lands and destroys most of the trees in a forest?
A. There would be less fossil fuels in the ground that would be used for drilling
B. Plants would remove less carbon dioxide from the atmosphere
C. An increase in organisms respiration would raise the level of carbon dioxide in the air
D. More resources would be available for animals in the area

Answers

Answer:

B

Explanation:

The effect of the carbon cycle if a tornado lands and destroys most of the trees in a forest is Plants would remove less carbon dioxide from the atmosphere.

What impact does the carbon cycle have on land?The important changes in the land carbon cycle are likely to come because of climate change. Carbon dioxide rises temperatures, extending the growing season and increasing humidity. Both factors have led to some additional plant growth. However, warmer temperatures also stress plants.

Thus, option "B" is correct.

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First one to answer gets BRAINLEIST! :D

Answers

Answer:

B and D

Explanation:

Which statement does NOT describe a scientific theory?
A)
A scientific theory can never be proven
B)
A scientific theory is supported by facts
0)
A scientific theory eventually becomes a fact
D)
A scientific theory is a generally accepted explanation

Answers

Answer:

Its C

Explanation:

Trust me it may not make sense but it is correct UwU

How do decomposers obtain their food?
A. hunting and killing prey for food
B. changing carbon dioxide and water
into food
C. absorbing food from dead organisms
D. producing food from oxygen and
sunlight

Answers

C.absorbing food from dead organisms .

Answer:

C. absorbing food from dead organisms

Explanation:

4. Which level of organization is made of similar cells working together?
For example, many muscle cells working together.

Answers

The level of organization would be a tissue. Tissues are the second level of organization made up of many cells working towards a common goal/ function.
Tissues are the body cells that work together

Your mother and your grandmother were right when they said to eat your carrots for healthy eyes. Beta carotene, a carotenoid found in carrots, is a molecule that the body easily changes into vitamin A. In which group of organic molecules do carotenoids belong?

Answers

Answer:

tetraterpenoids

Explanation:

Carotenoids belong to the category of tetraterpenoids. They contain 40 carbon atoms, being built from four terpene units each containing 10 carbon atoms.

Do protists (amoeba, Euglena, Paramecium) use similar structures to move? Explain.

Answers

Answer:

Most protists move with the help of flagella, pseudopods, or cilia. Some protists, like the one-celled amoeba and paramecium, feed on other organisms. Others, such as the one-celled euglena or the many-celled algae, make their food by photosynthesis. ... Theyuse pseudopods to move away from bright light or to trap food.

Within the protist kingdom, organisms have developed very similar structures that are used to move around the environment.

The protist kingdom is primarily comprised of very small, single-celled organisms. Among the vast number of organisms that make up this kingdom are algae and amoebas. Over the course of history, these organisms have evolved very similar means of mobility.

Within the protist kingdom, most of the organisms move with one of the structures:

CiliaPseudopodiaFlagella

These three structures used by protist to move are very similar in that are all structural extensions on the exterior limit of a cell. Though clear differences exist in the number or other uses of these extensions, it is clear that all of the members of this kingdom have evolved similar means of mobility.

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Several factors affect an organisms ability to fossilize. The unlikelihood of fossilization results in large gaps in the fossil record. Which would decrease the likelihood that an organism fossilizes?

Answers

Complete question:

Several factors affect an organism´s ability to fossilize.  The unlikelihood of fossilization results in large gaps in the fossil record.  Which of the following would decrease the likelihood that an organism fossilizes?

The organism lower on the food chainThe organism higher on the food chainThe organism with a hard body rather than a soft bodyThe organism that lived in a marine or aquatic environment

Answer:

The organism higher on the food chain

Explanation:

The organism lower on the food chain. Their high reproduction rate, as well as their numerous populations, favor them at the moment of fossilizing under different environmental conditions.  The organism higher on the food chain. These organisms tend to be predators or bigger animals, characterized by small populations with a reduced number of individuals in comparison with smaller organisms. The fact that their reproductive rate is not very high, that they live longer and hence they are fewer in number, do not favor their fossilizing possibilities under different environmental conditions.The organism with a hard body rather than a soft body. Hard tissues always increase the possibilities of fossilizing, as their biological or mechanical destruction is not as easy as the destruction of the soft tissues.  The organism that lived in a marine or aquatic environment. It seems that those organisms that live in a sedimentary environment, such as the sea or a lake, or those that live buried or fixed to the bottom, have more possibilities of fossilizing.

ANSWER QUICK PLEASE !!!

Explain how a greenhouse stays warmer than its outside.

Answers

Answer:

Greenhouses stay warm because only some kinds of radiation penetrate their surfaces, which are glass and/or plastic. Solar radiation passes freely through clear substances such as greenhouses' glass and plastic, and it heats soil, stone, plants and anything else inside the greenhouses.

If 30% of the nucleotides in a single-stranded RNA molecule are adenine, then what percent are expected to be thymine?

Answers

Answer:

Explanation:

the base pair of adenine is thymine they are equal in amount in RNA so if 30% of the nucleotide in RNA is adenine so the percentage of thymine would also be equal to adenine that is 30%

If the DNA strand has 30% Adenine in its composition, it means that the same DNA strand has 30% thymine in its composition.

This is because:

DNA is composed of the nitrogenous bases Adenine, Thymine, Cytosine and Guanine.These nitrogenous bases were paired with each other.Adenine pairs with Thymina. While Cytosine pairs with Guanine.Therefore, the amount of Adenine and Thymine in a DNA must be equal. While the amount of Guanine and Cytosine must be equal.

In this case, we can conclude that if the DNA has 30% of Adenine, it is mandatory that this same DNA has 30% of Thymine.

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What is a disadvantage of a 2D model of the digestive system?

Answers

Answer:

The disadvantage of 2D model of the digestive system is that it decreases cell to cell interaction and it is not a very important biological model.

Explanation:

The 2D model does not show quality similarity and resemblance to the main digestive system and also fail to reveal the interaction of cell surfaces of each other, it does not provide the quality detail of biological systems in digestive systems and this model is not very important or relevant biological model because It does not provide quality detail.

Which of the following is an example of a detritus food chain?
A. Graas, Insects, Snakes.
B. Plankton, Large fish, small fish.
C. Organic matter, Bacteria, Molluscs.
D. All of the above.

Answers

Explanation:

Detritus food chain is the type of food chain that starts with dead organic materials. The dead organic substances are decomposed by microorganisms. The organisms that feed on dead organic matter or detritus, are known as detritivores or decomposers. These detritivores are later eaten by predators.

The _____________ model is a model proposed by Nicholaus Copernicus, a Polish cleric, around 1500. His model proposed that all the planets revolve around the Sun and the moon revolves around Earth

Answers

heliocentric (hope it helps)

please answer as many as possible

Answers

Answer:

in second assignment 1 - b

Explanation:

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