Which definition is the best for “semipermeable membrane”?

It is a barrier that prevents materials from moving from one side to the other.

It is a barrier that allows materials to move freely from one side to the other.

It is a barrier with tiny openings that let some, but not all, materials pass through.

It is a barrier that helps materials move from one side to the other.

Answers

Answer 1

it is a barrier with tiny openings that lets some ,but not all, matérials pass through

Answer 2

Answer:

C

Explanation:


Related Questions

4. Using the Celsius scale, at what temperature does water freeze? At what temperature does water boil?

Answers

Answer:

Using celsius water freezes at 0, and water boils at 100.

Explanation: That is the purpose of the celsius scale to measure between those two points.

can somebody help me with this worksheet please!?

Answers

A test cross performed between the individual with unkown genotype and the h0m0zyg0us recessive individual. 9) hh. 10) Hh or HH. 11) HH x hh. 12) 100% Hh. 13) Hh x  hh. 14) 50%Hh and 50% hh. 15) -16) in the text.

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Available data:Single diallelic gene codes for hair in Guinea pigsAllele H is dominant and codes for having hairAllele h is recessive and codes for not having hair

For this gene we will assume complete dominance, meaning that the dominant alele completely hides the expression of the recessive allele.

According to this information, we can say that

Genotype      Phenotype

HH                  Hairy pig

Hh                   Hairy pig

hh                   Hairless pig

9) Geneviene does not have hair  ⇒  Its genotype is hh

10) Fred has hair ⇒ Its genotype is HH or Hh

Possible crosses

11 and 12)

Cross1: If Fred was genotype HH and bred with Genevieve

Parentals) HH    x    hh

Gametes)   H   H    h    h

Punnett square)    H    H

                        h   Hh   Hh

                        h   Hh   Hh

F1) 100% of the progeny is expected to have hair and be heter0zyg0us, Hh.

13 and 14)

Cross2: If Fred was genotype Hh and bred with Genevieve

Parentals) Hh    x    hh

Gametes)   H   hh    h    h

Punnett square)    H    h

                        h   Hh   hh

                        h   Hh   hh

F1) 50% of the progeny is expected to have hair and be heter0zyg0us, Hh.

     50% of the progeny is expected to be hairless and be h0m0zyg0us recessive, hh.

15)  

• If the individual with the unknown genotype (Fred) is heter0zyg0us, the phenotypic rate of the descendants is 50% heter0zyg0us -Hh- and 50% h0m0zyg0us recessive -hh-.

• But if the individual with the unknown genotype is h0m0zyg0us dominant, the phenotypic rate of the descendants is 100% heter0zyg0us for the trait, Hh.  

16)

The weakness is that even if Fred is heter0zyg0us for the trait, when making the cross it might occur that all individuals in the progeny are born h0m0zyg0us recessive, and there is a risk of missinterpreting the results.

So in that situation, many crosses must be done between fred and genevieve to se sure about Freds genotype.

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Which cells can form ATP by breaking down glucose?

a
Prokaryotes only
b
Plants only
c
All cells
d
Animals only

Answers

Answer:

C.) All cells

Explanation:

because energy needs plants as well as animals including prokaryotic cell

if you visit the beach on a hot summer day you will probably feel a Sea Breeze coming off the water onto the land. Which of the following causes this sea breeze?

A. The water is warmer than the land during the day.
B. Hurricanes that form in the oceans blow air into the shore.
C. During the day,solar radiation warms the land faster than the water.
D. Earth is tilted toward the Sun, causing air to move inland from the water​

Answers

If I am correct, the answer is supposed to be C due to on hotter portions of the day, land warms much faster than the water. This causes cooler air to rise from the oceans and the wind currents then push the air towards the land.

ill give brainlietst and 50 points
Drag each tile to the correct location on the chart.
Determine whether each statement describes mitosis, meiosis, or both mitosis and meiosis.

Answers

Answer:

DNA replicates in both mitosis and meiosis, Mitosis occurs during growth and development, In meiosis the number of chromosomes reduce by half, Mitosis occurs in all organisms, Meiosis occurs in organisms that sexually reproduce, and chromosomes stay the same in Mitosis.

Explanation:

Mitosis: Occurs during growth and development, Occurs in all organisms, and The number of chromosomes remains the same

Meosis: The number of chromosomes reduces by half, and Occurs in organisms that sexually reproduce

Both: The DNA is replicated.

1. The DNA is replicated: Both Mitosis and Meiosis. In both processes, DNA replication occurs before the division of cells, ensuring that each daughter cell receives a complete set of genetic information.

2. Occurs during growth and development: Mitosis is the process responsible for the growth, repair, and development of multicellular organisms by producing identical daughter cells.

3. The number of chromosomes reduces by half: Meiosis involves two divisions that result in the reduction of chromosome number by half, leading to the formation of gametes (sperm and egg cells) with half the usual number of chromosomes.

4. Occurs in all organisms: Mitosis is a fundamental process occurring in various organisms, ranging from unicellular to multicellular, for growth, tissue maintenance, and asexual reproduction.

5. The number of chromosomes remains the same: In mitosis, the daughter cells have the same number of chromosomes as the parent cell, maintaining the chromosome count.

6. Occurs in organisms that sexually reproduce: Meiosis is specific to organisms that reproduce sexually, as it produces genetically diverse gametes that contribute to the variability of offspring.

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___________________________ structure is the distribution of individuals among various age groups in a population.?

Answers

Answer:

Distribution structure is the distribution of individuals among various age groups in a population.?

Explanation:

Which process can cause chemical overheating

Answers

Answer:

Thermal Runaway

EX- Thermal runaway describes a process that is accelerated by increased temperature, in turn releasing energy that further increases temperature.

Explanation:

For a more simpler explanation , picture a pot of water and as you increase the volume of fire so does the energy (HEAT) inside . As air bubbles (ENERGY) start to quickly evaporate (BOILING) this actually increases the temperature inside causing Thermal Runaway.

What organs are targeted by the hormones secretin and cholecystokinin (CCK) to release pancreatic juice and bile into the small intestine for digestion

Answers

Secretin acts in tandem with another hormone called cholecystokinin (CCK). Not only does CCK stimulate the pancreas to produce the requisite pancreatic juices, it also stimulates the gallbladder to release bile into the duodenum.

A given skull has flaring zygomatics, shovel-shaped incisors, round orbits, and moderate nasal aperture width. The ancestry of this individual is likely ________________

Answers

Answer:

Asian or Native American

Which part of the plant cell absorbs the energy needed for the process

Answers

Answer: chloroplasts

Explanation:

18. Replicate the following four DNA strands using what you know about complementary base pairs.


a. AATACGTCCAGATTTT

c. CCCGCGGAATATACA

b. TTAACCGAGTTCAGA

d. AGGGCTACTTCAGAC

Answers

Answer:

a. TTAGCAGGTCTAAA

b. GGGCGCCTTATATGT

c. AATTGGCTCAAGTCT

d. TCCCGATGAAGTCTG

The replication can be TTATGCAGGTCTAAAA, GGGCGCCTTATATGT, AATTGGCTCAAGTCT, and TCCCGATGAAGTCTG respectively.

What is complementary base pairing?

Complementary base pairing occurs when guanine always hydrogen bonds to cytosine and adenine always binds to thymine in DNA.

In comparison to the A-T bond, which always shares two hydrogen bonds, the bond between guanine and cytosine shares three hydrogen bonds.

Each strand of the double helix contains all of the information required to reconstruct the other half using the base pairing mechanism.

The strands are said to be complementary because each can be used to make the other.

Complementary base pairing describes how the nitrogenous bases of DNA molecules align with one another. The double-helix structure of DNA is also due to complementary base pairings.

TTATGCAGGTCTAAAA, GGGCGCCTTATATGT, AATTGGCTCAAGTCT, and TCCCGATGAAGTCTG are possible replications.

Thus, these are the complementary base pairing for the given codes.

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Describe the differences between a monocot and a dicot. Are they similar in any way? Provide examples in your explanation. PLEASEE

Answers

Answer:

Monocots differ from dicots in four distinct structural features: leaves, stems, roots and flowers. ... Whereas monocots have one cotyledon (vein), dicots have two. This small difference at the very start of the plant's life cycle leads each plant to develop vast differences.          They are similiar in ssome ways are they both grow with a type of leave same shae in third growing proscess

Explanation:

Answer:

Hey mate.....

Explanation:

This is ur answer.....

Monocots differ from dicots in four distinct structural features: leaves, stems, roots and flowers. But, the differences start from the very beginning of the plant's life cycle: the seed. Within the seed lies the plant's embryo. Whereas monocots have one cotyledon (vein), dicots have two.

Similarities :-

Both monocots and dicots have stamens with two pairs of pollen sacs, male gametophytes of three cells, and female gametophytes made up of seven cells with eight nuclei. Also, the carpel is closed.

Hope it helps!

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5. Viruses are not cells, nor are they made of cells. They also cannot
reproduce without another living cell. Which statement about viruses
is true?
A. viruses do not have a nucleus
C. virus are made up of tissues
B. viruses are multicellular
D. viruses are made up of organs

Answers

Answer:

B

Explanation:

... I think :] it could also be D

!!!!NEED HELP ASAP ILL GIVE BRAINLIEST AND 25 POINTS!!!!! How do proteins help transport of materials through the membrane?

Answers

Answer:

Channel proteins can aid in the facilitated diffusion of substances by forming a hydrophilic passage through the plasma membrane through which polar and charged substances can pass.

Explanation:

Answer: By forming a continuous protein pathway across the membrane, these proteins enable specific hydrophilic solutes to cross the membrane without coming into direct contact with the hydrophobic interior of the lipid bilayer. Carrier proteins and channel proteins are the two major classes of membrane transport proteins.

To read signs, you need to have good ________ . focal vision peripheral vision paracentral vision double vision

Answers

Pretty sure it’s focal vision.
Hope that helps:)

To read signs, one needs good peripheral vision. The capacity to see things that are beyond of one's direct line of sight is known as peripheral vision. It is the capacity to perceive things that are beyond of one's direct field of vision.

Because it enables a person to perceive items that are situated at the boundaries of their peripheral vision, this form of vision is crucial for reading signs.

For instance, it's crucial to be able to understand signs that are placed along the side of the road when driving. A person might not be able to see the signs and might miss crucial information without adequate peripheral vision. Aside from peripheral vision, clear focus vision is crucial for reading.

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describe what a growth factor is and how it influences the cell

Answers

Answer:

Growth factors are proteins that act as mitogens to stimulate and encourage cell migration.

Explanation:

The Diagram shows structures that form the surface of the trachea.
Which level of organisation is the structure labelled S ?
A. Cell
B. Organ
C. Organ system
D. Tissue

Answers

Its the tissue that is labeled s

Structure S is a simple columnar epithelium, which is a type of tissue.

The diagram shows the structures that form the surface of the trachea. The trachea is a tube that carries air from the lungs. The surface of the trachea is lined with a layer of tissue called the epithelium. The epithelium is made up of cells that line the inside of the trachea.

The structure labelled S is a type of epithelium called a simple columnar epithelium. Simple columnar epithelia are made up of cells that are arranged in a single layer. The cells in a simple columnar epithelium are tall and column-shaped.

The simple columnar epithelium in the trachea helps to protect the trachea from infection. The cells in the epithelium produce a mucus that traps dust and other particles. The mucus is then carried away by the cilia, which are tiny hairs that line the trachea.

The other levels of organization in the diagram are organ, organ system, and cell. The trachea is an organ, which is a collection of tissues that work together to perform a specific function. The respiratory system is an organ system, which is a group of organs that work together to perform a common function. Cells are the basic units of life, and they are the building blocks of tissues, organs, and organ systems.

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What factors help blood move through veins?

Answers

The pumping force of the ventricles moves blood through the arteries. The breathing movements exerts pressure on the chest veins, the valves in the larger veins keep the blood from flowing backwards, and the skeletal muscles' contraction all help the blood in veins to move.

it can be very difficult to select an angle for sneaking up to a grasshopper to catch it because grasshoppers have

Answers

Answer:

compound eyes and multiple ommatidia

quizlet verified BIO 1306 Ch. 50 Exam 2

:D

Epinephrine mediates the fight-or-flight response of the body. One of the effects is to increase the amount of glucose available to muscles. What does the signaling pathway triggered by epinephrine cause to occur in liver cells

Answers

Answer:

In liver and muscle cells, epinephrine stimulates the release of glucose from glycogen by inhibiting glycogen synthesis and stimulating glycogen breakdown.

Explanation:

My aunt works in the medical field, so I asked her. Hope this helps whoever needs it.

In general, did the simulated mice align with your predictions from the Punnett squares?.

Answers

Research studies are often carried out using mouse. From the study, the simulated mice was said to align with the predictions from the Punnett squares. So the answer is Yes.

The reason why some of the percentages did not exactly match your predicted results because the Mice don't have large litters, so the sample size was not large enough.

If the experiment is to be done again, I can improve upon experimental design by;

Increase the number of mice bred. Examine a different trait within mice. Examine a trait in another species. Test patterns for future generations.

A lot of studies is been carried out on the Genetics of the mouse.  The  early development of inbred lines were studied. The mouse is known to be a good tool to identify the genetic basis of both normal and disease traits.

See full question below

In general, did the simulated mice align with your predictions from the Punnett squares?

(Choices: Yes, No)

Error Analysis: What might be the reason that some of your percentages didn't exactly match your predicted results?

Options are;

Gametes aren't responsible for inheritance. Mice don't have large litters, so the sample size was not large enough. The wrong type of mice were used.

If you did the experiment again, how could you improve upon the experimental design? Check all that apply.

Increase the number of mice bred. Examine a different trait within mice. Examine a trait in another species. Test patterns for future generations

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Answer:

The answer is yes....

Explanation:

Diagram and label a chromosome in prophase

Answers

ii) The reason for population control is as followed
1. The desire for a male child.
2. Lack of awareness about birth control measures.
iii) 1. The pituitary gland secretes hormones that regulate all other endocrine glands so it is called the master gland.
2. Gametes are produced by meiosis in which the number of chromosomes gets reduced to half. So they are haploid. During fertilisation, the zygote has a diploid number of chromosomes.

science questions , may be out of order but please help asap ( about mitosis ) may be out of order so i made two questions

Answers

Answer:

8. Prophase

9. Gap 1

10.Metaphase

Explanation:

Basically from what I remember

Prophase: Mitosis begins, nuclear envelope is gone

Metaphase: Chromosomes line up and spindle fibers attatch

Anaphase: Chromosomes are torn apart to separate sides of the cell

Telophase: Separates duplicated genetic material into 2 identical nuclei

Cytokenesis: The cytoplasm itself separates and forms 2 cells.

Gap 1: Cells increase in size as new organelles are formed

Synthesis: DNA is formed

Gap 2: DNA is checked as cell begins to divide

Mitosis: Cell divides

So from the simplified versions of things I remember, I think the answers listed above probably suit each question best.

Hope I helped a bit!

Describe the three types of waves that emanate from and earthquake. Compare their speed, type of motion and what the types of material they will travel through (solid/ liquid) PLZ HELP ME DUE TONIGHT!!!!!!!

Answers

Answer:

The types of waves that emanate from and earthquake are the body waves (P-waves and S-waves), and the surface waves. The surface waves travel along the suface, and are are the slowest, even though they do the most damage in an earthquake. While the P-waves travel the fastest through solids, liquids, and gases. S-waves, however only travel through solids.

Hope that helped! <3

I’m confused with this question
Can anyone help?

Answers

I get why u were confused cause the way they word some of the answers literally doesn't make any mf sense

my best answer would be the 3rd one (sediment that is sorted by size due to the changing velocity of the water)

Explanation:

because when sediments are well sorted their sizes are similar

a veggie garden is 2 meters long by seven meters wide. it is home to 168 mice. what is the population density of the mice?

Answers

the area of the vegetable garden is:
12*7=84 meters

168/84= 2

There is 2 mice per meter in the vegetable garden.

Please help! Multiple choice question.

Answers

i’m pretty sure it’s a. sorry if i’m wrong <3

Cellular respiration uses one molecule of glucose to produce approximately
A. 2 atp molecules
B. 4 atp molecules
C. 32 atp molecules
D. 36 atp molecules

Answers

Answer and Explanation; Equation for Cellular Respiration:

C₆H₁₂O₆ + 6O₂ --> 6H₂O + 6CO₂ + 36-38 ATP

Products of Cellular Respiration:

Water, Carbon Dioxide, and 36-38 ATP molecules

The answer is (D) 36 ATP molecules.

Study the diagram showing the range of temperature in the Earth’s layers.

Which temperature most likely corresponds to the asthenosphere?

1,613°C
2,521°C
3,628°C
6,217°C

Answers

i think c is the correct option...

Answer: a) 1,613°C

Explanation: just took the test

The energy in ATP is -

a
Stored in the vacuoles
b
Not widely used by cells
c
Stored between its phosphate groups
d
Not very useful

Answers

Answer:

adenosine triphosphate

Explanation:

adenosine triphosphate (ATP), energy-carrying molecule found in the cells of all living things. ATP captures chemical energy obtained from the breakdown of food molecules and releases it to fuel other cellular processes.

B

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