prokaryotic cells have a single circular chromosome and a defined nucleus? true or false?
Answer:
False, it lacks a defined nucleus.
Explanation: By definition, prokaryotes lack a membrane-bound nucleus to hold their chromosomes. Prokaryotes generally have a single circular chromosome that occupies a region of the cytoplasm called a nucleoid. They also may contain small rings of double-stranded extra-chromosomal DNA called plasmids.
Answer:
False
Explanation:
Prokaryotic cells don't have a nucleus, they have a nucleoid region
How many different keys can be used in a single sort?
Answer:
The answer is 3.
Explanation:
Hope this helped Mark BRAINLEST!!!
Which of the following are resources that individuals of different species
might compete for in an ecosystem? Check all that apply.
Answer:
I don't know what the options are but some of the following could be what organisms compete for.
- Food
- Water
- Territory
When you look at your teacher's face, how can you see it?
0 Light reflects off of her face.
O Her face emanates light.
O Light refracțš through her face
O Her face emits electromagnetic radiation.
Answer:
0 Light reflects off of her face.
How are humans circulatory system similar and different to other animals
Answer:
Humans have a heart with two atria and two ventricles that pushes blood in one direction. Some animals have hearts similar to humans but, other animals have only one atrium and one ventricle or a cardiovascular system that can push blood in two directions.
Humans circulatory system is similar due to presence of artrium and ventricles and different to other animals due to number of heart chambers.
How human circulatory system similar and different to other animals?Humans have a heart with two atria and two ventricles that prevents bactward flow of blood. Some animals have hearts similar to humans but, other animals have only one atrium and one ventricle that can push blood in two directions.
So we can conclude that Humans circulatory system is similar due to presence of artrium and ventricles and different to other animals due to number of heart chambers.
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Usable fresh surface water is relatively scarce. To many people, streams and lakes are the most visible part of the water cycle. Not only do they supply the human population, animals, and plants with the freshwater they need to survive, but they are great places for people to have fun.
Answer:
True.
Explanation:
Usable fresh surface water is scarce. Freshwater is not in excess on our planet. We can find it on lakes, lagoons, rivers, and swamps, but it is only 3% of the totality of Earth's water. The importance of this water is that it is the one that is suitable for humans, a large number of plants, and animals. This is why there are different methods to store and distribute fresh water amongst all the population and places that need it. Besides, the places where freshwater is, are great for activities, such as swimming, sailing, rafting, diving, fishing, etc.
Since freshwater is scarce and has so many uses, we must take care of it.
Describe what a spreading center is and how a volcano
forms there.
Explanation:
Spreading center volcanism occurs at the site of mid-oceanic ridges, where two plates diverage from one another. As the plates are pulled apart, hot ashtenophere rise upward to fill voids of the extended lithosphere.
Imagine a genetic cross between two people, blood type AB. What is the probability that these people will have offspring with type B blood? A) 0% B) 10% o 25% D) 50%
At which time points did the scientists take measurements? (Attachment)
Answer:
(0,0) (2,45) (4,25) (6,20)
Explanation:
Using this chart of word roots and affixes, which is the most likely meaning of
the word tripod?
Prefixes
Sumixes
mono: one
bi: two
tri: three
omni: all
pro: for, in favor of
forward
epi: on, outside
se: apart
athlon, prize, contest -able, -ible capable of
ped, pod, foot -ic: like, related to
phon, phone: sound -oid. resembling
spect to look
-ant, having the qualities of
derma: skin
-ia: condition, world, society
hydr. water
-ology, -logy, the study of
cred, to believe, trust -ous: full of
tone: tone, sound
-ence: a state or condition
A. An animal that walks on four legs
B. A three-legged stand
C. A three-part belief system
D. The ability to walk on hind legs
Answer:
THE ANSWER IS LETTER B
Explanation:
Answer:
B
Explanation:
How many chromosomes foes the nucleus of heart muscle cell contain?
Answer:
46 chromosomes
Humans have 23 pairs of chromosomes, so our hearts have 46 chromosomes.
Explanation:
Hope it helps
Answer:
46 chromosomes
most of them contain 46 chromosomes like almost all the rest of the body's cells
How do Venus, Earth, and Mars compare to each other? Explain.
Answer:
Explanation:
Because they are all 4 rocky planets in the solar system, I did it when i was in 4th grade during my solar system project
The Venus, Earth, and Mars compare to each other because they are all 4 rocky planets in the solar system.
What is the solar system?The Sun and the objects that orbit it make up the gravitationally bound system known as the Solar System. The massive interstellar molecular cloud's gravitational collapse resulted in its formation 4.6 billion years ago.
Our planetary group comprises of our star, the Sun, and everything bound to it by gravity - the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune; planets as small as Pluto; a lot of moons; and millions of meteorites, asteroids, and comets.
The fundamental thought of the planetary group was proposed by the Clean stargazer Nicolaus Copernicus (1473-1543) who said that "the Sun is the focal point of the Universe" and made the planets move around it in amazing circles.
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where does diffusion take place in the nervous system?
Answer:
In diffuse systems nerve cells are disseminated all through the life form, generally underneath the external epidermal layer. Hope this helps.
Explanation:
What would happen if earth had no atmosphere
Answer:
solar radiation would break atmospheric water into oxygen, which would react with carbon on the Earth to form carbon dioxide. The air would still be too thin to breathe. The lack of atmosphere would chill the Earth's surface. ... Plants and land animals would die
Explanation: rewrite it
a Name two producers in the food web.
Answer:The producers in a food web are plants, algae, and some bacteria as they are capable of fixing carbon, producing sugars.
Explanation:
Vascular plants are able to grow taller than nonvascular plants because A. lignin in the cell walls of vascular tissue helps the plant overcome gravity. B. they can live in drier areas than nonvascular plants. C. they rely on osmosis to transport materials throughout the body of the plant. D. there is more sunlight in the areas where vascular plants live.
Answer:
c
Explanation:
Answer:
A
Explanation:
I got it wrong the first time
Mutation please help.
Answer: i dont know how to do this
Explanation:
Which of the following might restrict the growth of a population?
O Mild winters
O Increased predation
o Increased numbers of prey
O Ample rainfall
30 POINTS!!!!
Answer: Increased predation, and mild winters.
Explanation: As the prey population increases, there is more food for predators. So, as the number of predators increases, more prey are captured.
Mild winters would cause all of the plants to die, therefore prey would also die due to lack of food and cause predators to die as well for the same reason.
Side note: It might also be ample rainfall but I didn't know if they meant ample rainfall as in flooding or not, if it means flooding then that could be an answer, too. And I also wasn't sure if this was multiple choice or not.
Good luck! :)
When the cells in the male and female parent divide, do them they form body cells or sex cells? Please explain!!!!!
Answer:
well i kinda think they form a body cell only ...
A mutation is least likely to affect a cell when the mutation --
A mutation is least likely to affect a cell when the mutation is silent in nature or is not associated with an exon, it is least likely to affect a cell. Any mutation that happens to the introns does not affect the cell's function.
What is the function of cells and mutation?As genetic materials, nucleic acids encode information about the cell's structure and function, its proteins, receptors, and so on. The mRNA that is formed from the gene has roles in the formation of the receptor, the enzymes, etc., so if any mutation happens to the gene that is in the coding region, then it can show its impact, but if the mutation is of the silent type, then it has no impact on the cell.
Hence, when a mutation is silent in nature or is not associated with an exon, it is least likely to affect a cell. Any mutation that happens to the introns does not affect the cell's function.
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In the term isotonic, the prefix iso- means
A. Above
B. Equal
C. Below
D. Pressure
Answer:
Iso stands for equal......
A copy a chromosome made during cell division are called
Answer:
As a cell prepares to divide, it must make a copy of each of its chromosomes. The two copies of a chromosome are called sister chromatids.
please please please please please help me
Answer:
i think it is the third option
Explanation:
hope this helped
(sorry if this is wrong.)
The total momentum of the system will remain the same. The momentum and energy is transferred from the first ball into the other one, but none is lost.
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I need help please with both of them
prevent
location
Explanation
Which of the following are grasses which grow edible seeds?
A. Grains B. Legumes C. Beans D. Lentils
Answer:
B.Legume
Explanation:
A Legume is a plant that has a seed, pod, or other edible part of a leguminous plant, used as food.
Mosses, liverworts, and hornworts all have ______ reproductive characteristics?
embryonic style
asexual offspring
alteration of generation
Answer:
i think its alteration of generation
Explanation:
i studied this but i have loss of memory
Need answer ASAP please thanks
Answer:
rr
Explanation:
you're welcome--------
GIVING BRAINLIEST AND THE REST OF MY POINTS!!!!! :D
Two parts of the food chain are described below:
Part #1: These organisms are the ending of the food chain.
Part #2: This passes energy to plants and animals.
Which statement is true about these two parts of the food chain?
A) Part 1 are consumers, Part 2 is the sun
B) Part 1 are consumers, Part 2 are producers
C) Part 1 are producers, Part 2 is the sun
D) Part 1 are producers, Part 2 are consumers
(DONT ADD ANY LINKS)
The correct statement is B) Part 1 are consumers, Part 2 are producers.
What are the two parts of food chain?Part 1 of the food chain describes organisms that are the end of the food chain, which would typically be consumers or animals that feed on other organisms, including plants and other animals.
Part 2 of the food chain refers to something that passes energy to plants and animals. This is typically the sun, which provides energy through photosynthesis to producers, or plants, that convert light energy into chemical energy stored in food. Producers form the base of the food chain, providing energy to all other organisms in the ecosystem through the food they produce.
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IF YOU WANT POINTS HERE YOU ARE!!! ANSWER THE QUESTIONS IN THE PICTURE!!!!
Answer:
13- can't see the question
14- 75%i think
15- the likelihood is 25%
16-Bb and bb
Explanation:
pictures below, hope this helps :)
A Carbon Sink is a reservoir which absorbs more carbon than it releases. Suggest how carbon in the bodies of crustaceans and molluscs is removed from the oceanic food chain to become part of another, slower carbon reservoir.
Answer:
Crustaceans and Molluscs play an important role in the oceanic carbon sink.
Explanation:
Carbon sinks can serve to partially offset greenhouse gas emissions. Forests and oceans are both large carbon sinks. Algae is pressurized to bottom of the ocean by long term sequestration. Algae then falls to the bottom of the ocean and TRANSFORMS to fossil fuels.
CO2 is not combustible. creates carbonic acid in the oceans. Reduces seawater pH, carbonate ion concentration, and thus calcium carbonate (needed for shells for marine creatures, contributes to BOTTOM-UP EFFECT)If helpful, please mark as brainliest! =)