Answer:
There are 3 basic steps involved in DNA extraction, that is, lysis, precipitation and purification. In lysis, the nucleus and the cell are broken open, thus releasing DNA. ... Alcohol (e.g isopropanol or ethanol) is then added, causes precipitation of DNA from the aqueous solution since it does not dissolve in alcohol.
Explanation:
1. Which image shows a virus that can infect
the human body?
Answer: c
Explanation:
a is mitochondria which is part of the cell
b is the cell itself
c is the virus
d is a nerve
6 Question
Question 1) Which biome is characterized by relatively high precipitation, high temperatures, high biodiversity, and low latitudes?
1) Tundra
2) Temperate Deciduous Forest
3) Chaparral
4) Tropical Rainforest
Question 2) A square mile of tropical rainforest contains 36 mammal species. A square mile of tundra contains 4 mammal species.
What characteristic of ecosystems is being described above?
1) succession
2) abiotic factors
3) producers
4) biodiversity
Question 3) Which of the following is most likely to decrease biodiversity?
1) Clearing a forest to raise livestock for a nearby town
2) Adding native plants to a suburban garden
3) Protecting more land from future housing developments
4) Reintroducing natural predators to an area
Question 4) In the Kelp forest ecosystem, sea urchins eat kelp, and sea otters eat sea urchins.
What is the role of sea urchins in this ecosystem?
1) producers
2) secondary consumers
3) primary producers
4) primary consumers
Question 5) What is the correct order of energy flow in an ecosystem?
1) sun → rabbit → grass
2) fox → rabbit → grass
3) sun → grass → rabbit
4) sun → fox → rabbit
Question 6) A savannah ecosystem includes grasses, zebras, and lions, and elephants.
Which of the following has the greatest overall biomass in this ecosystem?
1) grasses
2) zebras
3) elephants
4) lions
Question 1) :4) Tropical Rainforest
Question 3):1) Clearing a forest to raise livestock for a nearby town
Question 4) : 3)primary consumers
Question 5): 3) sun → grass → rabbit
Question 6) : 1) grasses
What is an example of an Adaptation?
A) a fossil
B)gradualism
C)mimicry
D)embryos
BRAINLIEST FOR WHOEVER IS CORRECT
Answer:
B
Explanation:
The definition of gradualism is the slow and gradual changes that happen within an organism or society to make a better environmental fit for animals and humans. An example of gradualism is the stripes of a tiger developing over time so they are better able to hide in tall grass.
Hope it helped :)
Production of the male gametes is known as
ОА.
Oogenesis
O B.
Spermatogenesis
O c.
Seminiferous
D.
Semengenesis
Answer:
answer is C spermatogenesis
The diagram shows a food web.What is most likely to happen if the snake population is wiped out?
A.The mouse population will decrease.
B.The plant population will increase.
C.The fox population will increase.
D.The hawk population will decrease
The diagram shows a food web. The snake population is wiped out is the hawk population will decrease. Therefore, option (D) is correct.
What do you mean by food web?A food web is the natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community.
A food web consists of all the food chains in a single ecosystem. Each living thing in an ecosystem is part of multiple food chains. Each food chain is one possible path that energy and nutrients may take as they move through the ecosystem.
The fundamental purpose of food webs is to describe feeding relationship among species in a community. Food webs can be constructed to describe the species interactions.
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In a solution of seawater, salt is which of these?
A. solute
B. compound
C. solvent
D. mixture
Why is reaction rate important for biological organisms
Answer:
Explanation:
The rate of a reaction is a powerful diagnostic tool. By finding out how fast products are made and what causes reactions to slow down we can develop methods to improve production.
Reaction rates are important for biological organisms in order to maintain the proper functioning of organisms' bodies and sustain life generally.
Life in biological organisms is sustained by several interdependent metabolic processes. Each metabolic process consists of reactions whose rates are carefully controlled so as to maintain certain physiological conditions of organisms.
The maintenance of relatively constant internal processes in organisms is what is called homeostasis. If reaction rates exceed or fall below normal, internal physiological processes may become disrupted and this may spell doom for the organism.
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Explain briefly what is the branch of biologuy and the role
Answer:
Biology is a branch of science that deals with living organisms and their vital processes.
Explanation:
hope this helps
The diagram shows an energy pyramid.
If the flowers contain 50,000 kcal of energy, about how
much energy will the lizard obtain from eating the
butterfly?
Quaternary Consumer
500 kcal
O 5,000 kcal
50,000 kcal
500,000 kcal
Tertiary Consumer
Secondary Consumer
Primary Consumer
Producer
Answer:
Its A for Edgeunity
Explanation:
Every consumer it passes through loses a 0, so
Flower: 50,000
Butterfly: 5,000
Lizard: 500
Answer:
Either d or c, listen I think it might be c actually
Explanation:yes
Ms. King's class is planning an experiment to find out the average number of sunny days per week this October for their city.
What is the function of the skin in protecting the body from disease?
Answer:
A.killing the infection
Explain briefly how these features contribute to the efficiency of photosynthesis?
Answer:
here's your answer
Explanation:
the estimated maximum energy efficiency of photosynthesis is the energy stored per mole of oxygen evolved, 117/450, or 26 percent.
Consequently, plants can at best absorb only about 34 percent of the incident sunlight. The actual percentage of solar energy stored by plants is much less than the maximum energy efficiency of photosynthesis. An agricultural crop in which the biomass (total dry weight) stores as much as 1 percent of total solar energy received on an annual areawide basis is exceptional, although a few cases of higher yields (perhaps as much as 3.5 percent in sugarcane) have been reported. There are several reasons for this difference between the predicted maximum efficiency of photosynthesis and the actual energy stored in biomass. First, more than half of the incident sunlight is composed of wavelengths too long to be absorbed, and some of the remainder is reflected or lost to the leaves
As with all multicellular organisms, homeotic genes in plants control morphogenesis (how the tissues and organs of the plant are arranged). in maize plants, the homeotic gene knotted1 (abbreviated kn1) maintain the indeterminate state of shoot apical meristems. in wild-type maize plants, kn1 is expressed at high levels in the shoot apical meristem, but is expressed at low levels in leaves. in some mutant maize plants, kn1 is expressed at high levels in leaves. in those plants, outgrowths or knots of adventitious shoot meristems (shoot meristems that appear in abnormal locations on the leaves) form. use this information to determine which of the following statements are true. select the four statements that are true.
a. expression of the kn1 gene in shoot apical meristem cells produces a protein involved in the maintenance of shoot apical meristems.
b. in wild-type maize plants, the kn1 gene is mostly expressed in shoot apical meristem cells.
c. in mutant maize leaves, the kn1 gene is mostly not expressed.
d. leaves of the mutant maize plants produce more kn1 protein than leaves of wild-type maize plants.
e. both the wild-type and mutant maize leaves have the same morphology.
f. in wild-type maize plants, the kn1 gene is present in shoot apical meristem cells, but not in leaf cells.
g. in wild-type maize plants, the kn1 gene is expressed diferentially in shoot apical meristem cels and leaf cells.
Answer:
a. True
b. True
c. False
d. True
e. False
f. False
g. True
Explanation:
The homeotic genes refer to evolutionarily conserved genes that modulate the development of different structures in organisms of the same groups (in this case, plants). Moreover, homeobox genes are genes that encode transcription factors involved in the regulation of development in eukaryotic organisms. The knotted1 (kn1) gene is a plant homeobox gene is a member of the kn1 homeobox (knox) gene family, which is responsible for maintaining indeterminacy and preventing cellular differentiation. In maize, kn1 plays a key role in maintaining the cells of the shoot apical meristem in an undifferentiated state, being mainly expressed in shoot meristems during postembryonic stages of shoot development. It has been observed that maize mutant plants where kn1 is ectopically expressed (i.e., in tissues in which this gene is not normally expressed) exhibit proximal-distal patterning defects.
________________ ______________ is a learned trait and is not genetically passed down to offspring.
Answer:
Semi-permanent.
Sorry if im wrong
is this statement true or false? plants cell have chloroplast, but not mitochondria?
Answer:
It is false. Plant cells have chloroplast and mitochondria.
Answer:
yeah hes right the plant wouldnt be living without mitochondria
Explanation:
How do Demetri's results show that digestive enzymes are crucial to maintaining homeostasis in the body?
In addition to breaking down food so that the nutrients may be absorbed, enzymes also generate vitamins like biotin and vitamin K and protect the body from dangerous microorganisms.
What is homeostasis?
Biological system's ability to self-regulate and maintain stability while responding to shifting environmental factors is known as homeostasis.
The body needs a steady supply of nutrients from food that has been digested. They are crucial for maintaining health and carrying out bodily tasks. The body may absorb and use food that has been broken down by the digestive system.
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describe the two types of factors that limit population growth.
Answer:
high death rate is the major factor that limits population growth, and also the practice of family planning also limit population growth in a contry
Which of the following is a homeostatic response when the human body is fighting an infection?
Select one:
Negative feedback producing more antibodies in the blood.
Positive feedback releasing more enzymes into the blood.
Negative feedback increasing body temperature.
Positive feedback increasing heart rate.
Explanation:
The immune response contributes to homeostasis by helping to fight off infection and heal after infection or trauma. During an infection, molecules called pyrogens are released, which alert the brain to increase the temperature of the body, causing a fever
The homeostatic response when the human body is fighting an infection is negative feedback, increasing body temperature; that is the third option, as increasing body temperature helps to inhibit the growth and replication of pathogens and also enhances the immune response.
What is homeostasis in a fever?When the body is fighting an infection, it triggers a complex set of responses to try to restore homeostasis and overcome the infection. One of these responses is the activation of the immune system, which produces various cells and molecules to fight off the invading pathogens.
One of the most important homeostatic responses during an infection is the increase in body temperature, which is known as fever. The body's thermostat, which is located in the hypothalamus of the brain, is set to a normal temperature of around 37°C (98 °F). However, during an infection, the body may raise its temperature to 38°C (100.4°F) or higher.
Hence, the homeostatic response when the human body is fighting an infection is negative feedback, increasing body temperature; that is the third option.
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Help me please I am so such on this question ahhhh omggggg !!!!!!HELPPppp
Answer:
a.
Explanation:
Explain how DNA AND RNA WORK
Answer:
Explanation:
DNA are molecules that store genetic information in all organisms.
RNA are molecules that will form proteins based on the instructions coming from DNA.
If a person lives at high altitudes for an extended period of time, other body responses occur. One response is an increase in the number of red blood cells.
C. Explain how this response is helpful to the body.
At high altitudes, air temperature is also generally colder than at sea level.
D. Describe and explain one internal body response that occurs when a person has been outside long enough for his core temperature to drop.
Answer:
When a person has been outside long enough for their core temperature to drop, their body will respond by shivering. Shivering is an involuntary muscle movement that helps to generate heat and raise the core body temperature back to a normal level. This is an important response as it helps to protect the body from hypothermia, a dangerous condition in which the body's core temperature is too low.
Explanation:
how does PAMPs activate infectious Inflammation
Answer:
Activation of infectious inflammation:
PAMPs are derived from microorganisms and thus drive inflammation in response to infections. After identifying microorganisms infections PAMPs by PRRs, activate cytoplasmic complexes called inflammasomes.
After activation of inflammasomes, these inflammasomes activate the protease caspase-1, which then cleaves or breaks various pro-inflammatory cytokines, resulting in maturation and cellular release that cause inflammatory reactions.
The difference in the chromosome arrangement during meiosis in the metaphase plate can lead to greater genetic diversity in a population. Explain your answer
Answer:
independent assortment
Explanation:
The independent assortment of chromosomes refers to the process by which pairs of homologous chromosomes are randomly separated during meiosis. In metaphase I, pairs of homologous chromosomes line up along the center of the cell at the metaphase plate, and subsequently segregate at anaphase I. For example, in humans, there are 8,324,608 different gametic combinations that can result from meiosis (i.e., 23 chromosome pairs >> 2²³ = 8,324, 608 gametic combinations). In consequence, it is almost impossible that two gametes have the same combination of chromosomes after meiosis, thereby this process increases the genetic variation in the population.
8. La metáfora "sin ti no podria vivir", a qué orgánulo
celular se refiere. Justifica to respuesta.
Esta cita se refiere a las mitocondrias. Las mitocondrias juegan un papel muy importante en la vida de las células, esto se debe a que sin las mitocondrias, la célula no podría sobrevivir.
What is species evenness?
a. The distribution of species throughout a habitat
b. The number of different populations in a community
c. The relative abundance of species in a community
The relative abundance of species in a community is known as species evenness. Therefore, option C is correct.
What is species evenness?Species evenness refers to the measure of the relative abundance of different species within a community or ecosystem. It describes the balance of the distribution of individuals among the different species present in a particular area.
For example, a community with high species evenness would have similar numbers of individuals in each species, while a community with low species evenness would have a few dominant species with many individuals and many less abundant species with fewer individuals.
Species evenness is often used in conjunction with species richness, which refers to the total number of different species present in a community, to provide a more complete picture of the biodiversity of an area. Thus, option C is correct.
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What converts sound waves to electrical impulses in the nervous system?
Oval window
Pinna
Cochlea
Tympanic membrane
Where are the organs associated with balance located?
The brain
The heart
The ear
The stomach
What type of muscle typically forms a lining for various organs?
Rough muscle
Smooth muscle
Cardiac muscle
Skeletal muscle
What are the body's two systems of internal communication?
Digestive and Endocrine systems
Nervous and Respiratory system
Respiratory and Endocrine systems
Endocrine and Nervous systems
Answer:
2.the inner ear 3. the smooth muscle and the skeleton muscle.
Situational context is the social and environmental setting in which a particular behavior takes place.
Please select the best answer from the choices provided
•True
•False
Answer:
True
Explanation:
HELP ASAP
Darwin carefully observed the finches of the Galapagos island. What he noticed was
that they were similar to the mainland finches, but each island finch has different
colored feathers.
numbers of offspring.
shaped and sized beaks.
colored eyes.
Answer:pls what is the question cause im not sure what it is asking
Explanation:
An enzyme called tyrosinase produced the dark compound in skin (melanin). I’m albinism, this enzyme does not work or is not present. Explain how each mutation could be responsible for Albinism.
The enzyme called tyrosinase produced the dark compound in the skin (melanin) but in albinism, this enzyme does not work or is not present, thereby this mutation could be responsible for Albinism because this phenomenon alters the molecular signaling pathway involved in the synthesis of skin pigments.
What is the relationship between genetic mutations and the alteration of signaling molecular pathways?The relationship between genetic mutations and the alteration of signaling molecular pathways is based on the fact that alteration in the genetic material can lead to defective proteins involved in a signaling network, thereby altering the final outcome of the pathway.
Therefore, with this data, we can see that the relationship between genetic mutations and the alteration of signaling molecular pathways is based on the molecular mechanisms that are altered during the generation of a phenotypic feature such as in this case skin pigmentation.
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Why will individuals have brown eyes rather than a blue eyes?
Answer:
because of the parent's genes
Explanation: