Answer:
La molalidad de la disolución es 0,125 molal.
Explanation:
En la teoría de las disoluciones químicas, la molalidad se define como la cantidad de moles del soluto dividida por la masa de solvente, entonces tenemos que la molalidad de la disolución descrita en el enunciado es:
[tex]m = \frac{0,5\,mol}{4\,kg}[/tex]
[tex]m = 0,125\,m[/tex]
La molalidad de la disolución es 0,125 molal.
the two main function of sweat are
a. to keep the body cool and to remove excess protein
b. to remove waste products and to cool the body
Answer:
Sweat's main function is to control body temperature. As the water in the sweat evaporates, the surface of the skin cools.
Bacteria of the genus Mycoplasma lack cell walls. What sort of environment do they require for survival
Answer:
biofilm
Explanation:
Answer:
isotonic
Explanation:
In hypotonic environments, the cells fill with water and bloat until they explode.
In hypertonic environments, the cells will lose their water and shrink.
In an isotonic environment, the cells would remain constant and thrive.
Eukaryotes have three nuclear RNA polymerases. The primary function of RNA polymerase II is transcription of _____.
Answer: the answer is protein-coding genes
(if this is right mark brainliest :))
Eukaryotes have three nuclear RNA polymerases. The primary function of RNA polymerase II is transcription of protein coding genes
what are the function of RNA polymerase ?there are Three different types of RNA polymerases (RNAPs), which transcribe eukaryotic genes, such as RRNA genes are transcribed by RNA polymerase I.
mRNA, miRNA, snRNA, and snoRNA genes are mainly transcribed by RNA polymerase II, while tRNA and 5S rRNA genes are transcribed by RNA polymerase III.
short RNAs as well as the protein coding genes are both transcribed by RNA polymerase II.
A Separate type of RNA polymerases are present in chloroplasts and mitochondria, where they specifically transcribe the DNAs of those organelles.
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What must happen before a chemical reaction can begin?
a. The activation energy must be exceeded.
b. The activation energy must be reached.
c. The concentrations of products and reactants must be equal.
d. The concentration of reactant molecules must be reduced.
Answer:
Your answer would be B
Explanation:
In order to start a chemical reaction, energy is needed
Answer:
Option B
The activation energy must be reached.
Explanation:
According to the collision theory, the following criteria must be met in order for a chemical reaction to occur: Molecules must collide with sufficient energy, known as the activation energy, so that chemical bonds can break. Molecules must collide with the proper orientation.
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Why do some species of predators appear
intimidating?
A. The adaptations they possess for hunting and eating
make them look intimidating.
B. Some predators can scare their prey into giving up
without a fight.
C. Predators do not appear intimidating.
Answer:
A. The adaptations they possess for hunting and eating make them look intimidating.
Explanation:
Some species of predators appear intimidating because of the adaptations they possess for hunting and eating make them look intimidating and fearful. The appearance of some predators make them intimidating which make the prey full of fear. For example, Lion is intimidating other animals especially its prey due to its attitude as well as physical appearance such as big sharp teeth and paws etc.
________, a mammalian hormone that also acts as a neurotransmitter in the brain, is released during breast feeding and by contact and warmth.
Answer:
"Oxytocin " is the right answer.
Explanation:
The hormone which is utilized to treat the condition as well as enhance uterine movements or contract or reduce post-birth hemorrhage is determined as Oxytocin.Is therefore considered to have become a driving factor promoting attractiveness and governs all but the most important parts of the reproductive tract as well as birthing.Archie took several deep breaths of air. By breathing deeply, what mechanism did he assist to return venous blood to his heart
Answer: Respiratory pump
Explanation:
By breathing deeply, the mechanism that Archie did hessist to return venous blood to his heart.
During the process of inspiration and expiration when the muscles contract and relax, pressure changes takes place in both the thoracic and abdominal cavities and this changes compress the nearby veins and help im the return of blood to the heart.
A(n)____is the product of gametes from two different
sources.
Answer:
I guess the answer is meiosis
Explanation:
Maybe yes or no but am 98% sure so it's ur lucky day. haha
Peoples choicee can sometimes have negative effect on their own health, as well as the health or well being of others. Describe two of these choices, explaining how they can impact the individual and others.
Answer:
smoking and alcoholism
Explanation:
Explain Central Nervous System.
Explanation:
The central nervous system controls most functions of the body and mind. It consists of two parts: the brain and the spinal cord. The brain is the center of our thoughts, the interpreter of our external environment, and the origin of control over body movement.
Explanation:
central nervous system is made up of the brain and spinal cord. it receives and integrate impulses from the receptors and then relays them to effector organs. it is the centre of co ordination.
A rigid coating that protects and supports a cell is:
A. Phospholipid bilayer
B. Cell membrane
C. Cell wall
D. Exoskeleton
Answer:
Cell Wall
Explanation:
However, cell walls are only in plant cells.
How many chambers are there in human heart
Explanation:
Your heart has 4 chambers. The upper chambers are called the left and right atria, and the lower chambers are called the left and right ventricles. A wall of muscle called the septum separates the left and right atria and the left and right ventricles. The left ventricle is the largest and strongest chamber in your heart.
Answer:
There are 4 chambers in the human heart
Explanation:
The right Atrium, the left Atrium, the right ventricle, and the left ventricle.
What is the main source of nutrients for autotrophs?
Answer:
Most autotrophs use a process called photosynthesis to make their food. In photosynthesis, autotrophs use energy from the sun to convert water from the soil and carbon dioxide from the air into a nutrient called glucose.
What are the masses of gray matter that lie deep within the cerebral hemispheres and that are responsible for regulating intensity and precision of voluntary movement
Answer:
Cerebral cortex.
Explanation:
The masses of gray matter that lie deep within the cerebral hemispheres is called cerebral cortex. The cerebral cortex is responsible for many brain functions such as sensation, perception, memory, association, thought, and voluntary physical action. Damage occur to cerebral cortex can leads to many cognitive, sensory, and emotional difficulties in the body. It is also responsible for regulating intensity and precision of voluntary movement.
In your own words, what is the definition for the word Interphase?
Answer:
is the portion of the cell cycle that is not accompanied by gross changes under a microscope
Answer:
the resting phase between successive mitotic divisions of a cell
Explanation:
the portion of the cell cycle that is not accomplished by gross changes under the microscope
Complete the sentences with the appropriate words Cells use ____________ to power most cellular activities that require work.
Answer:
ATP
Explanation:
somebody help. . can someone please tell me the types of layering in root establishment in plants?.
Answer:
Layering can be used to multiply many of your favorite plants now growing around your yard and in your home. There are six common types of layering: air, simple, tip, trench, serpentine and mound. Air and simple layering are the most popular types
Explanation:
PLZ MARK AS BRAINLIEST
Answer:
The answer above me is correct
What does alteration of generation mean?
Answer:
Alteration of generation, is the type of life cycle that occurs in those plants and algae in the Archaeplastida and the Heterokontophyta that have distinct haploid sexual and diploid asexual stages.
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ANALYZE How could scientists use data from tree rings to learn more about ecosystems
in the past? Use evidence from the tree ring in Figure 2a to support your answer.
Water evaporates from a lake. Arrange the next steps of the water cycle in the correct order.
Water vapor condenses to form clouds.
Water flows down mountains and hills.
Water falls as rain, snow, and sleet.
Water joins streams or forms
groundwater
Answer:
1. Water evaporates from a lake
2. Water vapor condenses to form clouds
3. water falls as rain, snow, and sleet.
4. water flows down mountain and hills
5. water joins streams or forms ground water
Repeating cycle
The physiologic effects of ______ include blood vessel constriction and decreased cellular metabolism.
Answer:
The physiologic effects of cryotherapy include blood vessel constriction and decreased cellular metabolism.
Explanation:
Cryotherapy is a treatment that uses cold to aid in the process of injury healing. One of the effects of low temperatures is vasoconstriction. As a result, the pressure increases, modifying the blood's flow and aiding in the healing process since blood circulation increases. The low temperatures also decrease cellular metabolism reducing the amount of oxygen that the cell needs. As a consequence, the cells have a higher chance of survival after the injury.
(drag and drop) (20 points)
Answer:
Less stable : An ecosystem with populations that mate with only related species
Less stable : An ecosystem that has many species at every trophic level
More stable : An ecosystem with populations that mate with unrelated species
More stable : An ecosystem that has very few species at every trophic level
describe how and where each type
weathering, erosion, or deposition occurs
In the Punnett square fill in the shaded boxes with the alleles of each parent use B for the dominant allele (black fur) and b for the recessive allele (white fur)
Answer:
Explanation:
Under the male put BB
Next to the female bb
then first row should be Bb Bb
second row should Bb Bb
Here, all the alleles of the black parent are dominant and are represented as BB, and those of the white parent are represented as bb, and they both are purebred dominant and recessive alleles that have produced all dominant black (Bb) offspring.
What is Punnett Square?A Punnett square is a diagram used to predict the possible outcomes of a genetic cross between two parents. In this case, the parents have different alleles for a gene that determines the color of their fur. The dominant allele B produces black fur, while the recessive allele b produces white fur. The Punnett square is arranged in a grid, with each box representing one possible genotype for the offspring. The top row and left-hand column of the grid represent the alleles that each parent can contribute to their offspring. In this case, both parents are purebred,as expressed below.
Hence, black parents are dominant and are represented as BB, and those of the white parent are represented as bb, and have produced all dominant black offspring.
Learn more about the Punnett square here.
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For young men of age 20, there have been 150 rounds of DNA replication during sperm production as compared to only 23 rounds for a woman of age 20. That is a 6.5-fold greater number of cell divisions and proportionately greater opportunity for new point mutations. Yet, on average, 20-year-old men contribute only about twice as many new point mutations to their offspring as do women. How can you explain this discrepancy
Answer:
A plausible hypothesis is that deleterious germline mutations in sperm cells are removed by natural selection since sperms have to compete to fertilize the egg
Explanation:
Sperm cells need to travel through the cervix in order to reach the uterus and fertilize the egg. During this process (which is called 'fertilization'), approximately 300 million sperm cells have to compete in a race to reach an egg. During fertilization, the majority of sperm cells die off quickly because male germinal cells carry mutations that lead to abnormalities (e.g., many sperms have double heads, others no tail, etc). The sperm cells are considered to be physiologically weak because their normal functions can be easily disrupted by mutations and, simultaneously, they are under strong selective pressure to be selected during the sperm race. In consequence, deleterious germline male mutations are expected to be eliminated by natural selection, thereby sperms are selected before fertilization so only the strongest ones can compete in the race to fuse with the egg cell and thus develop one zygote.
the two main function of sweat are
a. to keep the body cool and to remove excess protein
b. to remove waste products and to cool the body
Answer:
b. to remove waste products and to cool the body
Explanation:
pretty sure
a) Arrange the seedless vascular plants, angiosperms, non-vascular plants and gymnosperms in order according to the complexity of their features.
b) Arrange the same groups in the order in which they appear in the fossil record.
c) Compare the order of your two lists. What is the pattern?
Answer:
Cover the classifiction of plant on the evolution of history of significant feature in plant Gymnosperm evolved to have seed but not have flowers me. in the other way evolved seeds vascular tissue.
Under which circumstance will a disease not spread beyond a few individuals in a population? If the rate of infection is lower than the rate of recovery, the reproductive ratio of the infection will be less than 1. If the rate of recovery is lower than the rate of infection, the reproductive ratio will be greater than 1. If the primary case infects a large number of people very quickly, the reproductive ratio will be less than 1. If the reproductive ratio is greater than 1, only a few individuals in a population will be infected.
Answer:
The correct answer is - If the rate of infection is lower than the rate of recovery, the reproductive ration of the infection will be less than 1.
Explanation:
The rate of infection is the chances or occurence of new cases of infection in a particular population over a particular time period and the rate of recovery is the occurence of the recovery of an individual case over a period of time. These two rates determines if a disease or infection is spreading faster or lesser.
The higher the rate of infection to rate of recovery it is more lkely to be spreading rapidally and higher the rate of recovery the infection not spreading beyond few individuals in the population. In the later case, the reproductive ration of the infection will be less than 1.
When two populations of animals which arose from a common ancestor become geographically separated, the populations become increasingly different from one another as each adapts independently to a suite of unique ecological conditions. These populations are said to be __________. Conversely, when two populations of animals, especially those arising from unrelated ancestors, become increasingly similar as they adapt to common (shared) ecological conditions, they are said to be __________
Answer:
divergent; convergent
Explanation:
The first populations of animals are said to have evolutionally diverged while the second populations are said to have evolutionally converged.
In divergent evolution, closely related animal populations accumulate differences (due to differences in their environments) so much so that they can become different species.
In convergent evolution, different animal populations evolve similar traits (due to similarities in their environment).
Hence, the correct words to fill the gaps would be divergent and convergent respectively.
A man cannot be a carrier for hemophilia. Why?
Answer:
This means that males only have one copy of most of the genes on the X chromosome, whereas females have 2 copies. Thus, males can have a disease like hemophilia if they inherit an affected X chromosome that has a mutation in either the factor VIII or factor IX gene.