HELP ASAP, this is for k12 bio

Answer: Muscle contraction occurs when the thin actin and thick myosin filaments slide past each other. It is generally assumed that this process is driven by cross-bridges which extend from the myosin filaments and cyclically interact with the actin filaments as ATP is hydrolysed.

Explanation: and this is what happens: The sliding of protein filaments is responsible for muscle contraction. When a motor neuron stimulates a muscle fiber, overlapping thick and thin filaments slide along one another and sarcomeres shorten. The combined shortening of many sarcomeres in many muscle fibers results in contraction of the whole muscle.

DNA (deoxyribonucleic acid) is the hereditary material in almost all living organisms. Most DNA is located in the nucleus.

For extraction of DNA we need  500 ml water,91% Isopropyl Alcohol (rubbing alcohol),Dishwashing liquid, Salt, Food coloring (dark colors recommended),3 clear plastic cups

Steps include  Pour 500ml water in a plastic cup

2. Add one tablespoon of salt to the water

3.dissolved the salt completely

Transfer 2 tablespoons of salt water in a clear plastic cup

2. Vigorously trill the salt water

3. Spit salt water back into the same cup

When you trill the salt water, cheek cells will come out. Add 1ml of clear dishwashing soap to the salt .It will break open the cheek cells and their nuclei walls and this causes the DNA to be released into the salt water.

1. Pour 100 ml isopropyl alcohol plastic cup.

2. Add 3 drops of food coloring, and isopropyl alcohol  in a separate clear plastic cup.

2. Add 3 drops of food coloring, mix them well

DNA is insoluble in isopropyl alcohol so it will promotes the clustering of the DNA, making them visible.

To learn more about DNA , here

brainly.com/question/264225

#SPJ1

Answer:

B. an enzyme is answer og that question

The way that looking at the carbon footprint or water footprint similar to looking at a biomass, energy, or numbers pyramid is that indicates how much energy is stored as new biomass at each trophic level, and a pyramid of biomass shows how much biomass is stored as new biomass overall.

Of all energy sources, biomass energy has the fourth-highest carbon footprint. On a life-cycle basis, biomass fuel emits 230 grams of carbon dioxide (CO2) for every kWh produced. It is not as advantageous as it might seem, it contributes to climate change, and has other detrimental environmental repercussions.

Therefore, note that at higher trophic levels, organisms are often greater in size, but because there are fewer of them, there is less biomass produced. The total mass of all trophic level creatures is known as biomass.

Learn more about carbon footprint  from

https://brainly.com/question/22884757
#SPJ1

Answer: Enough water droplets need to band together to

start falling back to earth as rain.

Explanation: I took the test

Answer:

H20

Explanation:

Simply look at your right side of equation and product is always there.

Based on the sequence, the given sequence is the non-transcribed strand of DNA. I wrote a sequence of double-stranded DNA. The top strand indicates the transcription start site ATG. In messenger RNA, T or thymidine is replaced by U or uracil.

You can look up the codon table to give all possible amino acids where ATG, which encodes methionine, can be the first amino acid.

5'-A T G G G A A AT C A T C G G T  G A-3'

3’-T A C C C T T T A G T A G C C A C T-5’

All mRNAs are read in the 5'-3' direction and polypeptide chains are synthesized from the amino terminus to the carboxy terminus. Each amino acid is specified by its three base codons in the mRNA, according to the nearly universal genetic code. The main enzyme involved in transcription is RNA polymerase, which uses a single-stranded DNA template to synthesize a complementary strand of RNA.

Learn more about Transcribe mRNAs here:-https://brainly.com/question/16225334

#SPJ1

The three final ice ages were within the periods between 450-420 mya, 360-260 mya, and 34 mya to show.

The ice age or serious wintertime term is caused by the variety within the time and concentration of Light. The light coming from the sun includes an exceptionally viable nature on earth's climate and by and large environment of the surface of the soil.

Andean-Saharan ice age (460 to 430 million a long time back)- It caused the mass termination of creatures, and after a brief term of time. The plants secured most of the surface of the soil. Because it too said that due to this tall number of plants another ice age was caused.

Karoo ice age (360 to 260 million years ago): karoo ice age worked much just like the same as that we are living in now. Antarctica solidifies over (14 million a long time back): Right now, we are living in this ice age. As the shafts of the soil are secured by ice caps.

The foremost latter is the Late Cenozoic ice age, beginning from 34 mya and still going on, in this way we are living in an ice age at the minute, fair that we are not in a period of glaciation.

Learn more about icecaps at

https://brainly.com/question/1104636

Although part of your question is missing, you might be referring to this full question:

Over the last 540 million years, icecaps covered at least one of the Earth’s poles during three intervals. When were those intervals?

2,500 years ago, Democritus suggested that all matter in the universe was made up of tiny, indivisible, solid objects he called "atomos." However, other Greek philosophers disliked Democritus' "atomos" theory because they felt it was illogical.

The following is the most comprehensive list of the components of the experiment described in this scenario:

This is a reference to the actions used to verify or disprove a theory. Other individuals who evaluate it, including scientists, use it to determine the veracity of the assertion.

According to the scenario, one group of identical mice receives the supplement while the other group does not, making the group that received the supplement the experimental group while the control group received nothing.

Option B was picked as the best option since the supplement that was provided to the mice served as the dependent variable.

Experiment is discussed in greater detail

at brainly.com/question/17274244.

#SPJ1

During the carbon cycle, organic matter can be used in multiple ways by different organisms, although, this chemical compound also can be buried underground and converted into peat, coal, oil, or gas deposits. This is possible due to organisms can store this material in their structures to grow, and eventually, when they decay, for example, when a tree or an animal dies, it begins to form part of the soil in which they were before. This is the reason why currently we can extract oil from underground sinks, because of those biggest organisms that lived millions of years ago, such as the dinosaurs and ancient plants.

Having this clear, we can say that the correct answer is the first one.

We can see the carbon cycle in this licensed image.

Answer:

Meiosis is a type of cell division in sexually reproducing organisms that reduces the number of chromosomes in gametes

Explanation:

C and D

The formation of some ATP molecules

The splitting of glucose molecules

Answer:

Black body and red eyes are the phenotype and ggWw and hetrerozygous are the genotype.

Explanation:

The phenotype is what is presented while the genotype is what is occuring int he genes to cause the phenotype.

The surface ocean current relationship is balanced.

what is Geostrophic current?

At the point when the water is pushed to the right it frames the slope we describe previously. In this way, when water is moved along by the breeze it needs to be gone to one side by the Coriolis force (in the northern half of the globe) yet it should battle against gravity (attempting to climb the slope of water framed by Ekman transport). A balance is met between the Coriolis and the gravity (pressure inclination force). This balance delivers a fair stream called a Geostrophic current.

Learn more about Geostrophic current here:

https://brainly.com/question/13266942

#SPJ10

Answer:

hhhhjnnnnb;;$gguufd6uvdykcduhx6

Answer: It is True

Explanation:

Answer:

mutualism is the answer

Answer: C. mutualism

Explanation:

Active transport is the form of particle transport that requires input of energy from the cell.

Active transport is the one that makes use of energy for the transport of molecules across the membrane. It is further classified into two types: primary active transport and secondary active transport. Primary active transport directly uses the energy from ATP hydrolysis for the transport. Whereas, secondary transport involves cotransport system where the energy released from the downhill transport is used for the uphill transport of molecule.

Cell is the fundamental unit of life. It is the structural unit of all the organism. Cell can either be prokaryotic or eukaryotic.

To know more about active transport, here

brainly.com/question/12133248

#SPJ1

Working in molecular research would enable you to understudy the make up of materials.

A molecular researcher, is one who is interested in being able  to study the molecular composition of matter. This is one of the most fundamental areas of science as the scientists that work in this area are always trying to find out the molecules that compose matter. Recall that matter is anything that has mass and occupy space.

The area of molecular research is largely domiciled in the filed of biochemistry. Most of these molecules that are studied are of biological origin and can be found in the cell. During the pandemic, the molecular laboratories all over the word worked very hard to understand the nature of the corona virus.

Thus the field of molecular biology helps in the study of the DNA of living organisms as well us the understanding of the activities of enzymes. The greatest breakthrough of molecular research is the human genome project.

Learn more about molecular research:https://brainly.com/question/286720

#SPJ1

If a forecast states that the dew point and air temperatures are equal, the air is said to be saturated.

The dew point is the temperature to which a parcel of moist air must be cooled at constant atmospheric pressure and constant water vapor content in order for saturation to occur.

The dew point can also said to be the temperature at which the actual pressure of the vapor contained in an air parcel equals the saturation pressure, under constant atmospheric pressure.

When the dew point is equals the air temperature, the air is saturated and the relative humidity is %100.

Learn more about dew point at: https://brainly.com/question/14984865

#SPJ1

The change will have no impact because 2 years is long enough to allow organisms to adapt to the change.

The correct option is A.

Biodiversity is essential to the systems that support all life, including human life, on Earth. Without a wide range of different creatures, plants, and microorganisms, we cannot have the ecological health that we rely on to provide us with the oxygen we and the food we eat. Additionally, people value nature in and of itself.

Biodiversity contributes to a availability of food , nutrition, energy, the development of medications, and the demand for freshwater, all of which together support good health. Furthermore, it supports chances for employment and leisure activities that enhance overall wellbeing.

To know more about Biodiversity visit:

https://brainly.com/question/23101752

#SPJ13

Answer:

need more info, where r they now

The Sitenem asserts that all woman’s issues in society stem from the se- x based myth.

The correct answer choice is option c.

It follows that in every society, there are always issues faced by the female gender which usually, frequently and most of the time results in the discrimination of their gender which does not favour them. Women are being discriminated against from all aspects of life such as education, career, politics and socially. It is on this premise that women issue originate from se- x based myth.

In conclusion, we can now understand that women are being faced face ld with the problem of se- x based myth

Complete question:

How does human human problems arise from same sex based might?

(a) The patriarchy

(b) Lack of constitutional protection

(c) Se- x based myths

(d) Se- xist laws

Read more on women:

https://brainly.com/question/3256128

#SPJ1

Answer:

For mutations to affect an organism's descendants, they must: 1) occur in cells that produce the next generation, and 2) affect the hereditary material. Ultimately, the interplay between inherited mutations and environmental pressures generates diversity among species

Answer:

one of those could be the answer

Explanation:water, inorganic ions, and carbon-containing (organic) molecules.

The hypothesis was regarding embryo self-inspection in early development is that viability of embryo metabolism is quite rather than active due to depletion and appearance of amino acids from culture medium.  

Early embryo consist of remarkable plasticity which means ability of separated early blastomeres to produce a whole organism. This aspect was determined from flux of radiolabeled methionine, premises that extent of DNA damage, RNA and protein content of immature oocyte are key factors whether zygote progresses to blastocyst stage.

This hypothesis was obtained from human and mouse and could be equally applied to reproduction in livestock, to get models for humans.

Learn more about Early embryo here https://brainly.com/question/26027389