Paramecia that live in freshwater have contractile vacuoles, while those that live in salt water do not. Why do you think this is the case?
Answer:
water enters by osmosis, vacuole is used to pump out excess water.
Explanation:
Paramecia that live in freshwater would have contractile vacuole because they will need to get rid of excess water unlike those that live in salt water.
The vacuole primarily functions to get rid of excess water from the cell.
Freshwater is hypotonic to the cytosol of paramecia. Thus, water will always enter the paramecia cells by osmosis. If the excess water is not excreted from the cell, turgidity will result and the cell may burst.
On the other hand, salt water is likely hypertonic to paramecia cells. Thus, instead of having vacuoles for water excretion, a mechanism would have to be put in place so as not to lose too much water to the surrounding salt solution. In other words, a vacuole would be totally redundant in the hypertonic solution.
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I need help ASAP!!
Is the following sentence true or false?
Only pea plants that have two recessive alleles for short stems will be short.
Answer:
TRUE
Explanation:
I believe its true I read about it in a book somewhere.
Help!!!!
Match the pea plant with its combination of alleles. Use the groups below for questions 17, 18, & 19.
Combination of Alleles
Two alleles for tall stems
One allele for tall stems and one allele for short stems.
Two alleles for short stems
Which of the following is NOT a condition necessary for fossilization to occur?
A. Rapid and permanent burial
B. Presence of heat
C. Lack of oxygen
D. Continued sediment accumulation
E. Absence of compression
Answer:
its b
Explanation:
just took the test
please help me with this!! I will mark brainliest!
The stem of a plant is experiencing phototropism. Which statement correctly describes the plant's response?
Answer:
A the stem moves towards the light for better photosynthesis
Explanation:
saw it happen
Answer:
The Answer is A
Explanation:
Growth in plants reflects the way in which they interact with the environment. If we place a strong light at one side of this fuchsia plant, the plant will grow towards it. This is called a phototropic response.
How many and what types of chromosomes are found in every one of your cells?
The solar energy that reaches a planet is called?
a. temperature
b. insolation
c. light waves
d. brightness
Answer:
B
Explanation:
Barnacles and mussels are filter feeders that attach themselves to rocks in the ocean. They eat by filtering small particles of food from the ocean water as it flows over them. A scientist observed a dense colony of barnacles covering the surface of a rock. The mussels were only able to attach to a few, small crevices on the same rock.
Evaluate this observation and explain a limiting factor that is affecting the barnacles and mussels on the ocean rock
Answer:
The barnacles are only able to attach themselves to surfaces in the water. Since the surface is limited, barnacles are attaching themselves to the other barnacles, crowding the rock. The muscles were not able to grow or attach themselves off the surface of the rock. Same thing with the mussels that are growing on the rock. So not only barnacles are crowding the rock, but Mussels as well are crowding the rock.
Explanation:
Oysters and cockles are related to mussels and barnacles. These species can be found in both salt and fresh water. They are marine creatures.
What is limiting factor?A limiting factor is anything that restricts the size of a population and slows or stops its growth. Limiting factors include biotic factors such as food, mates, and resource competition with other organisms.
These creatures have evolved to live on rocky shorelines. The mussels are filter feeders that take in seawater and filter out particles.
The barnacles are gonochoristic, whereas the mussels are hermaphroditic.
The mussels' zonation is the area around the intertidal zones of rocks, as they require food to grow.
Mussels and barnacles are related to oysters and cockles. These species are found in both fresh and salt water. They are marine creatures.
Thus, this is the limiting factor in the give scenario.
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one and two please !!
How do cells get energy from glucose? How do they use that energy?
Answer:
Image result for How do cells get energy from glucose?
Through the process of cellular respiration, the energy in food is converted into energy that can be used by the body's cells. During cellular respiration, glucose and oxygen are converted into carbon dioxide and water, and the energy is transferred to ATP.
Explanation:
PLS ANSER THIS ASAP!
Answer:
number 3
Explanation:
i had this quiz and got it right
Answer:
c i think is the most relavent
If one strand of the DNA molecule has a base sequence with 8 nucleotides, how many nucleotides will the complementary base sequence contain? *
I believe it it is 8
PLEASE HELP ASAP!! WILL MARK BRANLIEST
Answer:hope it helped written by akashaplz mark it brainlist
Explanation:
so i will tell everyone that there was fire for 4 hours and no rescue team were there the fire was blown by a tourist that took the life of 100 animal so as everyone can see the plant are finished everywhere there is only ash and flash of animal .i want to tell the visitors that the rescue was near but they don't show action , as earth is home to many living organism so it is animal right to live in forest and it a request everyone should come and plant seeds so we can recover the forest
HELP, PLEASE!! ON THIS I ALREADY DID MOST OF IT! IT IS TOO SMALL TO READ!!
Answer: TT,TT,Tt,Tt tt,tt,tt,tt
i think
Explanation:
If a tall plant (TT) is crossed with a short (tt) plant, all of the offspring will be: *
A Tall
B Short
C Medium
D Combination
Answer:
C medium I'm pretty sure
Explanation:
because if you add short and tall you would get medium right?
Uranus is which planet from the sun?
Sorry about the subject, there is no science subject so I chose randomly
Uranus is the 7th planet from the sun :))
I need help with this question
Why would you expect a dead zone to start near the mouth of a river, where the river flows into a body of water?
20 points Please answer fast
Questions:
1. Were all your answers the same? Why do you think this is?
2. What type of person might have a low resting heart rate?
3. Why is important to know your blood type?
Please answer the picture and questions!!!
Answer:
Yes
unattached
Nearsighted
I'm also unsure
125bpm
1) Not all of the answers were the same because, everyones heart rate and blood type would be different from each other.
2) Athletes have a low resting heart rate.
3) During blood lost, you'll need a blood transfusion, if you don't know what blood type you have then it's most likely take longer to give you the correct blood type by doing a blood test.
Knowing how food choices impact the function and productivity of cells, why do you think it is important to maintain a healthy diet? What can happen if someone continually eats junk food?
Answer:
healthy diet prevents and protects from diseases like obesity, heart disease, diabetes, cancer and stroke. constantly eating junk food can lead to obesity and chronic diseases like cardiovascular disease, type 2 diabetes, non-alcoholic fatty liver disease and some cancers.
Explanation:
Maintaining a healthy diet is important because food provides the energy and nutrients that cells need to function properly.
What is health?"Health is a positive concept that focuses on both social and personal resources as well as physical abilities."
This means that health is a resource to assist an individual in carrying out their societal function, rather than an end in itself.
Junk food can have an impact on cell function and productivity in a variety of ways. A high-sugar diet, for example, can cause insulin resistance, which impairs cells' ability to absorb glucose and produce energy.
This can result in fatigue and reduced productivity. A high-fat diet can also have an effect on cellular function by increasing inflammation in the body, which can interfere with immune system function and increase the risk of chronic diseases.
Thus, maintaining a healthy diet is important for supporting cellular function and promoting overall health and well-being.
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which of these is not a molecule
A) DNA
B) water molecules
C) single atoms
D) medicines
Answer:
d) medicines
have a nice day! <3
explain the process of oxidative emtavoiliusm in details
Answer:
When energy is consumed in a process, chemical energy is made available for synthesis of ATP as one atom gives up electrons (becomes oxidized) and another atom accepts electrons (becomes reduced).
Hope it helps. :T
Match each inference about Barrow boy with the clue that best supports it.
Answer:
children goes with si serńiora, comfort with bed. family is errand
If you had to define ecological succession in your own words in a 140 character text, how would you define it?
Answer: Succession is like winning a race. You get to acomplish something that you wanted to do. sorry this is short
Explanation:
The Punnett square below shows a cross between 2 pink flowers. What is a percentage that a pink flower will be produced? *
Answer:
50%
Explanation:
rr, rw, rw, ww
Using the dichotomous key, Which kingdom classification of the organism is described above?
A.
Fungi
B.
Eubacteria
C.
Protista
D.
Animalia
Answer:
Fungi
Explanation:
Please help me with these questions on the Skeletal System
1. Which is not a function of the skeletal system?
A. Movement and protection B. Homeostasis C. Support D. Transport oxygen-rich blood to the body
2. Which organism has an exoskeleton?
A. A shark B. A human C. A black bear D. A common beetle
3. What is main function of the skull?
A. To keep out electromagnetic waves B. Allows for movement from one place to another C. Produces brain cells D. Protects the brain from injury
4. Tendons and ligaments are used to ___________.
A. Exchange gases within the body B. Transport nutrients to cells C. Produce red blood cells D. Attach bones to muscles and bones to bones.
Answer:
1 - D- Transport oxygen-rich blood to the body
Explanation:
2- D- Common Beetle
3- D- Protects the brain from injury
4- D- Attach Bones to muscles and bones to bones.
Genes are sections of DNA that code for a particular trait. Genes are
A. Carbohydrates
B. lipids
C. proteins
D. nucleic acids
Answer:
D. Nucleic Acids
Explanation: Since DNA is a nucleic acid, and a gene is a piece of DNA, a gene would also be a nucleic acid.
In what ways is water stored on Earth?
A. condensation, rainfall, snowfall
B. sublimation, transpiration, evaporation
C. ground-water, lakes and rivers, atmosphere, ice
D. ground water discharge, snowmelt runoff, surface runoff
Answer:
The correct answer is: ground-water, lakes and rivers, atmosphere, ice
Explanation:
I tooook the quizzzz
Which best explains why sexual reproduction produces greater variations among offspring? *
A The DNA come from two genetically different parents.
B The DNA cells from one parent that is genetically identical.
C The sex cells are produced by mitosis.
D The sex cells undergo self fertilization
Answer:
A The DNA come from two genetically different parents.
Explanation:
Everyone has different genetics. They are determined by sex cells that are produced by MEIOSIS NOT mitosis. Meiosis allows for genetic variation amoung offspring along with the genetically different parents.
The DNA come from two genetically different parents explains the best reproduction greater variations among offspring.
What is sexual reproduction?Reproduction is the act of one or more parents creating a new individual (offspring), frequently within the same species. It is among the characteristics of a living creature.
Sexual reproduction, we mean a process where two parents' genetic material is combined to create a child. When two haploid gametes combine, a genetically unique diploid child is produced.
The word "sexual" has a Late Latin etymology that stems from the word sexus, which means "of copulation or generation." The word reproduction is also derived from the Latin words re, which means "again," and productio, which means "creation." Alternative: syngenesis.
Therefore, The DNA come from two genetically different parents explains the best reproduction greater variations among offspring.
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