Answer:
When cellular membranes form, phospholipids assemble into two layers because of these hydrophilic and hydrophobic properties. The phosphate heads in each layer face the aqueous or watery environment on either side, and the tails hide away from the water between the layers of heads, because they are hydrophobic.
Explanation:
Which of the examples below illustrates a homologous body structure?
A. the forearm of birds, reptiles, and humans
B. the appendix found in humans
C. the pelvis and femur of a whale
The forearm of birds, reptiles, and humans illustrates a homologous body structure.
Similar physical characteristics found in species with a shared origin are known as homologous structures, although these characteristics have entirely different biological purposes. The limbs of humans, cats, whales, and bats are examples of homologous structures. All of these structures—arm, leg, flipper, and wing—are supported by the same type of bone structure.The arms of a person and the wings of a bat are excellent examples of homologous structures. Because both bats and people are mammals, they have a common ancestor.Even though they appear considerably different from one another from the outside, a bat's wing and a human arm have remarkably comparable internal bone structures. Wings help bats fly, whereas arms enable human interaction with their environment. The wing and the arm also have various purposes.learn more about homologous structures here: https://brainly.com/question/7904813
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Answer: A. the forearm of birds, reptiles, and humans
Explanation:
what is the value of atmospheric pressure in see level
Answer:
about 14.7 pounds per square inch
Answer:
about 14.7 pounds per square inch
Explanation:
What is a scientific explanation of a law?
A. an idea that can't be proven but can explain some phenomena
B. a statement based on repeated experiments and observation that can predict what will happen
C. an educated hypothesis that is supported with evidence
D. a hypothesis that can be tested
Answer:
It is B
Explanation:
A statement based on repeated experiments and observation that can predict what will happen
a scientific explanation of a law is a statement based on repeated experiments and observation that can predict what will happen. Hence option B is correct.
What is Law in Physics ?Scientific laws, often known as rules of science, are assertions that explain or predict a variety of natural events based on repeated tests or observations. In several circumstances (approximate, exact, wide, or limited), the term law is used differently across all domains of natural science (physics, chemistry, astronomy, geoscience, biology). Laws are derived from facts and can be further refined through mathematics; in all cases, they are founded on empirical evidence, either directly or indirectly. It is widely assumed that they implicitly reflect, though do not overtly claim, underlying causal linkages in reality and are found rather than constructed.
Physics laws are, by definition, stated facts that have been inferred and drawn from empirical data. Simply said, the world around us operates in a specific manner, and physical laws are a means of categorizing that operation.
Hence option B is correct.
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Which theory is most widely accepted in describing the formation of our universe?
the Big Bang Theory
the Singularity Theory
the Steady State Universe
che Eternal Inflation Theory
Answer:
The Big Bang Theory.
Explanation:
The Big Bang Theory is the most widely accepted hypothesis for the origin of the universe as we know it. It's implications are somewhat vague, as there is no concrete way to determine what really happened to create our universe, but it still holds water.
The basics of the Big Bang Theory is that a singularity was formed, a very small ball with infinite density and unimaginable heat. This singularity's expansion is what created the universe, essentially, a big bang.
Explain three main features of the following: a) Glycolysis b)Kreb's cycle c)Electron transpot chain
Answer:
A)Glycolysis is one method that cells use to produce energy.
B)a sequence of reactions in the living organism in which oxidation of acetic acid or acetyl equivalent provides energy for storage in phosphate bonds called also citric acid cycle, tricarboxylic acid cycle.
C)electron transport chain is a series of four protein complexes that couple redox reactions, creating an electrochemical gradient that leads to the creation of ATP in a complete system named oxidative phosphorylation.
Which of the following is an example of a density dependant factor?
A. Industrial pollution in a river
B. An herbivore species and a carnivore species sharing a habitat
C. 3 different herbivore species sharing the same field
D. A volcanic eruption
Three different herbivore species sharing the same field is an example of a density dependent factor (Option C).
What are density dependent factors?The density-dependent factors are those variables that affect the growth of a population regarding the number of individuals in such population.
Density-dependent factors include, among others, competition within the population or between populations, the presence of predators, etc.
In conclusion, Three different herbivore species sharing the same field is an example of a density dependent factor (Option C).
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a sharp knife cuts more easily than the blunt ones. Give reason.
Answer:
A sharp knife can cut objects more easily compared to a blunt knife because a sharp knife applies more pressure on the object.
A baby with blood group AB I born into a family where the mother has blood group type B and the father has type O
Determine whether the husband is the biological father of the baby
The baby AB received the IB allele from the mother and the IA allele from another person. The husband is not the biological father of the baby.
What are the blood type alleles?
Blood type is coded by a triallelic gene
IA allele is dominant over the i alleleIB is dominant over the i allele IA and IB are codominanti is the recessive alleleThe genotypes and phenotypes are
IAIA and IAi → Type AIBIB and IBi → Type BIAIB → Type ABii → Type 0
In the exposed example,
Baby → AB → IAIBMother → B → IBIB or IBiHusband → 0 → ii
The baby carries one IA allele and one IB allele.
The IB allele was inherited from the mother. The husband could only transmit a recessive allele i. But the baby does not carry any recessive allele.
The baby received the IB allele from the mother and the IA allele from another person.
The husband is not the biological father of the baby.
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Why are white-eyed female fruit flies so rare in nature?
A. White-eyed females are not rare.
B. The allele for white eyes was nearly removed from the gene pool.
C. Females must inherit two copies of the recessive allele.
White-eyed female fruit flies so rarely in nature because females must inherit two copies of the recessive allele. Therefore, option C is correct.
Why are white-eyed female fruit flies so rare in nature?The gene for eye color in fruit flies is located on the X chromosome, and there are two possible alleles: one for red eyes (dominant) and one for white eyes (recessive).
Male fruit flies have only one X chromosome, so if they inherit the white-eyed allele, they will have white eyes. However, females have two X chromosomes, so they must inherit two copies of the white-eyed allele to have white eyes.
Because the white-eyed allele is recessive, it is much less common than the red-eyed allele in the gene pool. In nature, white-eyed female fruit flies are rare because they must inherit two copies of the recessive allele from both parents. Thus, option C is correct.
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Which phrase best describes a process represented in the diagram below?* 5 points
---
Fertilized egg
O a zygote dividing by mitosis
a zygote dividing by meiosis
a gamete dividing by mitosis
a gamete dividing by meiosis
Multicellular
organism
The image shows a zygote dividing by meiosis.
What is cell division?We know that cell division occurs when a cell breaks up to give daughter cells. This could occur by mitosis or by meiosis. In each case, we have two or four daughter cells being formed.
Now we have to look at the image very well. We can see that the process is occurring inside the gamete cells. There is a fertilized egg that divides into two. We know that a fertilized egg is called a zygote.
In conclusion, we can say that, the image shows a zygote dividing by meiosis.
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Why does there need to be a concentration gradient across respiration surfaces?
A. So that oxygen can diffuse in, and carbon dioxide can diffuse out.
B. So that oxygen can diffuse out, and carbon dioxide can diffuse in.
C. So that there is no surface tension in the alveoli of the lungs.
D. So that there is surface tension in the alveoli of the lungs.
A concentration gradient across respiration surfaces is needed so that oxygen can diffuse in, and carbon dioxide can diffuse out; option A.
What is a concentration gradient?A concentration gradient is a difference in the concentration of molecule of substances across two regions or across a barrier.
A concentration gradient is necessary for diffusion of molecules of substances from one region to another.
Across respiratory surfaces, a concentration gradient is required in order for the gases to diffusion across the membranes from regions of high concentration to regions of lower concentration.
In conclusion, a concentration gradient is required for effective gaseous exchange across respiratory surfaces.
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ANSWER QUICK WILL GIVE BRAINLIEST
After recent renovations to an office building, employees in the building begin complaining of nausea and burning in their eyes and throat. What type of exposure is most likely causing these reactions?
Lead
Asbestos
Pesticides
Formaldehyde
The correct answer is Formaldehyde.
Formaldehyde
Building materials such as particleboard, plywood, and other pressed-wood products contain formaldehyde, a colorless, pungent-smelling, combustible chemical that is generated industrially. It is additionally frequently utilized in morgues and medical labs as a preservative, fungicide, germicide, disinfectant, and preservative. Environmental sources of formaldehyde are also common. It is created during the natural chemical reactions that occur in most living things as well as during the decomposition of plant matter in soil. It can also be detected in tobacco smoke as a byproduct of combustion. Inhaling formaldehyde gas or vapor from the air or absorbing formaldehyde-containing substances via the skin are the two main ways that people are exposed.
ANSWER QUICK WILL GIVE BRAINLIEST
After recent renovations to an office building, employees in the building begin complaining of nausea and burning in their eyes and throat. What type of exposure is most likely causing these reactions?
Lead
Asbestos
Pesticides
Formaldehyde
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Which of the following broad-based field of technical study prepares students for jobs requiring 21st-century knowledge and skills?
engineering
retail management
life sciences
STEM
STEM is a broad-based field of technical study that prepares students for jobs requiring 21st-century knowledge and skills.
What is STEM?STEM stands for Science Technology Engineering and Mathematics. STEM term is commonly used to deal with training policy or curriculum alternatives in faculties. It has implications for a team of worker's improvement, country-wide safety concerns, and immigration coverage. If we want a kingdom where our destiny leaders, acquaintances, and workers can apprehend and resolve a number of the complex challenges of today and day after today, and meet the needs of the dynamic and evolving team of workers, building college students' competencies, content expertise, and literacy in STEM fields is critical.
Thus from the above conclusion we can say that STEM is a broad-based field of technical study that prepares students for jobs requiring 21st-century knowledge and skills.
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Which of the following organisms reproduces asexually?
OA. Human
OB. Bacteria
C. Spider
D. Lobster
Answer:
OB. Bacteria
Explanation:
Bacteria reproduce through a process known as Binary Fission, which is an asexual reproduction by a separation of the bacteria into two new bodies.
HELP QUICK PLS!!!
Part A: Explain why ATP is important in biochemical reactions.
Part B: How is ATP similar to a rechargeable battery? Explain in terms of structure and function.
A vital source of power for biological functions is ATP. From molecules like glucose, energy is transported to the intermediate energy source ATP. A ubiquitous intermediary in metabolism, ATP serves as a store of potential chemical energy and connects reactions that need and produce energy.
What is biochemical reaction?The chemical reactions that take place in living things and involve biomolecules are referred to as biochemical processes.To expedite most biochemical reactions, an enzyme is a type of biological catalyst. The amount of activation energy required for the reaction to start is decreased by enzymes. Most enzymes are proteins that only interact with one particular chemical, known as their substrate.Photosynthesis and cellular respiration involve some of the most significant biological processes. Nearly majority of the species on Earth receive their energy from these two processes combined.It is a science that combines biology and chemistry and is laboratory-based. Biochemists can comprehend and address biological issues by utilizing chemical understanding and methods.Learn more about biochemical reaction here:
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Describe one or more of the scientific theories regarding the origin of life on the early Earth. Explain how RNA is important to this theory.
The RNA world is a hypothesis associated with the emergence of life on Earth and it is important because states that RNA had catalytic functions.
What is the RNA world?The RNA world is a scientific theory that states life began as primitive organisms in which the RNA played a dual function, i.e., as genetic material and as an enzyme.
The RNA world theory is sustained by the presence of ribozimes, i.e., enzymes composed of RNA instead of proteins.
In conclusion, the RNA world is a scientific hypothesis associated with the emergence of life on Earth and this theory is important because it states that RNA had catalytic functions.
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Which of the following are dangers of Climate change?
I. Disease carrying insects could multiply and spread to new areas
II. The number of floods could increase
III. Due to increased humidity, electricity would be harder to generate and more expensive
IV. Severe droughts could occur
A. II and IV
B. I and III
C. I, II, IV
D. II, III, IV
Answer: D
Explanation:
The following are the dangers of climate change are
I. Disease carrying insects could multiply and spread to new areas.
III. Due to increased humidity, electricity would be harder to generate and more expensive.
IV. Severe droughts could occur.
The correct option is D.
What is climate?Climate is the weather of a place for a long time. Like, the climate of Antarctica is always cold, and the oceans are always frozen. There are different climates in different areas.
Climatic changes are the long term effects that are changing the normal temperature and climatic conditions of an area. This is causing problems with the biotic factors of the area.
Like, the warming of Antarctica is increasing, which is resulting in the melting of ice, which can cause high floods.
Thus, the correct option is D. II, III, IV.
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What are three characteristics that make life possible on Earth?
Different characteristics such as Earth's atmosphere, distance from the Sun, and presence of water make life on Earth possible.
Is there a groups of rules for organisms to live?The idea that there is a group of rules to support life on Earth is controversial but it is clear that life as we know required different features to form.
Some of the most important features that support the emergence of biologically closed systems on Earth include the presence of water in a liquid state, an appropriate atmosphere and a suitable amount of solar radiation.
In conclusion, different characteristics such as Earth's atmosphere, distance from the Sun, and presence of water make life on Earth possible.
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Using the molecular data, make a general statement which compares the "rabbit-whale"
relationship to the "dog-pig" relationship. Does the cladogram agree with this statement?
Explain your reasoning
The comparison of the "rabbit-whale" relationship to the "dog-pig" relationship on the cladogram is linked based on their evolutionary relationships.
What is a Cladogram?This refers to the branching diagram that is used to show the link and the cladistic relationship that exists among different species.
Hence, we can see that based on the fact that rabbit-whale and dog-pig have a common ancestor and origin, on a cladogram, it can be stated and proven that they have an evolutionary relationship.
Therefore, the use of cladograms makes use of molecular data to show the homology level of nucleotide sequences of the genome.
Therefore, when the relationship of the "rabbit-whale" relationship to the "dog-pig" relationship was analyzed on the cladogram, it was found that they have a common ancestor.
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In your own words, explain the difference between the pitch and intensity of sound.
Answer:
The pitch of a sound is how high or low a sound is when we hear it, whereas the intensity of a sound is the energy/vibrancy of the sound over an area and depends on the frequency of the sound as well.
Removing a new cologne or bath product from the resident's room for your personal use is abuse
True/ false
Answer:
False
Explanation:
This might not even be considered stealing if the person removing the cologne puts it back but it is definitely not considered abuse which is where someone verbally or physically does harm to the victim.
differentiate between alimentary canal and digestive system
Explanation:
The digestive system runs from the mouth, gullet, stomach, liver, pancreas, duodenum/upper small intestine, ileum/ lower small intestine, large intestine, appendix, rectum and anus. However the alimentary canal has all the above features except for the liver and pancreas
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Analyze the image below of the various carbohydrate classifications. Compare and contrast each classification of carbohydrates and their structural characteristics.
longer chain that shows more carbon is used so its not a alcohol only up to methanlo or up to 3 carbon is considered as alcohol
You go for a run and breathe heavily for an extended amount of time. How is this affecting your pH levels?
A. Decreasing the pH, making it more acidic.
B. Increasing the pH, making it less acidic.
C. Increasing the pH, making it more acidic.
D. Decreasing the pH, making it less acidic.
You will run and breathe heavily for a long period of time. is affecting your pH levels, Lowering the pH, making it more acidic.
A. Lowering the pH, making it more acidic.How does respiratory rate affect pH?When it is respiratory, it occurs due to an increase in the amount of volatile acids in the body, which lead to an increase in pCO2. When it is metabolic, it occurs due to the accumulation of non-volatile acids, which lead to the loss (excessive consumption) of bases, mainly bicarbonate, causing a drop in pH.
With this information, we can conclude that By eliminating carbon dioxide during expiration, pulmonary ventilation reduces the acidity of the blood, helping it to maintain the desired alkalinity level.
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HELP ME Which property describes a mixture?
It cannot be separated by physical methods.
It has a single chemical composition.
It cannot have more than one state of matter.
It cannot be described by a chemical symbol or formula.
A mixture cannot be described by a chemical symbol or formula.
What is a mixture?A mixture is a substance that consists of 2 or more chemically different substances.
Examples of mixtures are sand and salt, water and kerosine, oil and water, etc.
Each substance in a mixture maintains its chemical identity. In other words, components of mixtures do not react with each other.
Thus, the components of mixtures can be recovered using relevant separation techniques.
Mixtures can be homogenous when the different components are uniformly distributed. They can also be heterogenous when the components are skewed to a specific side of the mixture.
Due to the fact that the chemical identity of the components of mixtures remains, it becomes impossible to assign a chemical symbol or formula to mixtures.
Therefore, mixtures can only be named according to the different components but cannot be assigned chemical symbols or formulas.
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What is the function of estrogen in the menstrual cycle?
A. Causes ovulation.
B. Maintains the uterus lining.
OC. Causes the uterus to thicken.
D. Causes the egg to develop.
Reset Selection
Estrogen play two main functions such as prepare maturation of an egg to release during ovulation and thicken the lining of uterus. Thus all options are correct.
What is Estrogen Hormone?
It is a sex hormone released in the adrenal glands, ovaries and fatty tissue,
It is mainly involve in development of breasts in puberty and the growth of uterus lining during the menstrual cycle.
Regulation of menstrual cycle, growth of pubic and underarm hair, bone strength can be regulated.
There are three types of estrogen released from our body such as Estradiol (E2), Estriol (E3), Estrone (E1).
Estradiol is observed in women of childbearing age, estriol is produced during pregnancy where as estrone is released after menopause.
Thus all options are correct.
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Agoraphobia may be characterized by which of the following
losing the desire to work or learn
having delusions and hallucinations
feeling hot and dizzy
being scared of heights
Answer:
Feeling hot and dizzy
Explanation:
Vertigo, sweating, feeling dizzy, and a sense of impending unconsciousness or passing out are other symptoms.
Agoraphobia may be characterized by feeling hot and dizzy. The correct option is C.
What is Agoraphobia?An uncommon form of anxiety condition is agoraphobia. Your fears prevent you from going out into the world if you have them. You steer clear of particular locations and circumstances because you fear getting stuck and being unable to receive assistance.
The signs of agoraphobia are fear of transportation in general, wide-open areas (parking lots, bridges), closed-in places (stores, movie theaters) (stores, movie theaters), and throngs of people or lines. It is also a fear in which you van not go outside your home.
The disorders may be pain in fear, chest pain, diarrhea, sweating, dizziness, and swelling.
Thus, the correct option is C. to feel hot and dizzy.
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Fill in the blank.
1. Helping children to evaluate and overcome frustrating situations is one way to prevent ________
2. Accepting and supporting a child fosters that child's __________
3. Giving a child a reason for a request helps to foster ________
and _______ .
4. When a caregiver sets limits so that children know what they can and can't do, the caregiver is
expressing ________
of the children's actions.
5. When a caregiver offers to help a child pick up blocks, the caregiver alts as a ________
of prosocial behavior.
6. Self-esteem is increased by ______________
a child's efforts.
Helping children to evaluate and overcome frustrating situations is one way to prevent aggression.
aggressionself-esteemself-esteem; self-regulationsupportmodelsupporting What are the methods used to help your child get control of their anger?A lot of people have no idea about social skills. We are known to often picked them as we grow up learn by observing people close to us such as out parents and in interactions with others.
A way that a child can manage their anger is for a parent to teach our children to be able to know and deal with their anger, as we can be able to prevent its negative effect before it occur.
Therefore, Helping children to evaluate and overcome frustrating situations is one way to prevent aggression.
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Bona has started reaction to the sound of a loud POP.immediatly before the loud pop,a light flashes, after several times,bona has started reaction to the flash of light.
A,what us UCS?
B, what is CR?
C,what is NS
D,what is UCR?
The Unconditioned stimulus (UCS) is the light flashes.
The conditioned response(CR) is reaction to flash of light.
The neutral stimulus(NS) is sound of a loud POP before conditioning.
The Unconditioned response(UCR) is reaction to the sound of a loud POP.
What is theory of learning?The theory of learning is defined as the various way individuals are able to receive and retain information for future purposes.
The different theory of learning include the following:
classical conditioningoperant conditioningCognitive learningSocial learning.The classical conditioning was by Russian physiologist, Ivan Pavlov.
Ivan Pavlov believed that learning process creates a conditioned response through associations between an unconditioned stimulus and a neutral stimulus.
Therefore from the experience of Bona:
The Unconditioned stimulus (UCS) is the light flashes.The conditioned response(CR) is reaction to flash of light.The neutral stimulus(NS) is sound of a loud POP before conditioning.The Unconditioned response(UCR) is reaction to the sound of a loud POP.Learn more about classical conditioning here:
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What features do
cardiac muscle cells
have when looking
under a microscope?
A. long and thin with striations and many nuclei
B. small, striated, and only 1-2 nuclei per cell
C. smooth, 1 nuclei, and connected by gap junctions
Explanation:
B. small, striated, and only 1-2 nuclei per cell
Answer:
B. small, striated, and only 1-2 nuclei per cell
