Which step constitutes the power stroke of muscle contraction?.

Answers

Answer 1
the myosin head moves toward the M line, pulling the actin along with it , as the actin is pulled, the filaments move approximately 10 nm toward the M line

Related Questions

What would happen if a disease has spread among lily pads in a pond ecosystem ?

Answers

Answer:

small fish that rely on lily pads for protection will decrease in population.

What type of intercellular junction bands together adjacent cells, making the epidermis stronger?.

Answers

Answer:

Tight or occluding junctions This type of junction is also called zonula occludens and is the most apical structure in the epithelial cell. Zonula occludens describes, that there is a formed band of tight junctions which encircles every cell.

Explanation:

Account for the loss of dry weight of cotyledons in a germinating bean seed

Answers

Tue loss of dry weight in the cotyledon of a germinating bean seed is because its nutrient stores are being used by the seed for germination

What is a cotyledon?

A cotyledon is a seed leaf within the embryo of a seed.

Cotyledons serve several functions in the seed including:

supply the nutrition a plant embryo needs to germinateserve as a source of nutritional reservesassist the embryo in metabolizing nutrition stored elsewhere in the seed.

Therefore, the cotyledon is a germinating bean seed will lose dry weight because its nutrient stores are being used by the seed for germination.

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Which is the best explanation for how earthquakes cause tsunamis?.

Answers

Answer:

Tsunamis are caused by violent seafloor movement associated with earthquakes, landslides, lava entering the sea, seamount collapse, or meteorite impact. The most common cause is earthquakes. See the percentages on the right for the geological events that cause tsunamis. Note that 72% of tsunamis are generated by earthquakes. A disturbance that displaces a large water mass from its equilibrium position can cause a tsunami.

Explanation: Hope this helps :]

how many types of reproduction​

Answers

Answer:

Sèxual and aséxual reproduction.

Explanation:

Depending upon the formation or non-formation of gamets, reproduction is of two types sèxual and aséxual reproduction.

-TheUnknownScientist 72

Enzymes are involved in the reactions,
Select one:
O a. Photosynthesis
O b. Neither Photosynthesis nor Cellular Respiration
O c. Cellular Respiration
O d. Both Photosynthesis and Cellular Respiration

Answers

Answer:

D.

Explanation:

•Specific enzymes catalyze each cellular reaction in cellular respiration. The main role of enzymes during the respiration reaction is to assist in transferring electrons from one molecule to another.

•The reactions of photosynthesis, and many other biological processes, are controlled by enzymes.

ENZYMES ARE REQUIRED FOR MOST OF THE CHEMICAL REACTIONS THAT OCCUR IN ORGANISMS

The nine elements that are most abundant in plants are called ,while the seven elements present in lower quantities are called:______.

Answers

Abundant are called major nutrients
Lower quantities are called minor nutrients

State one similarity and one difference between the responses of tropism and mastic movement.

Answers

Explanation:

The similarity between tropic and nastic movement is - both are the result of external stimulus and the difference between tropic and nastic movement is the direction of the response is not dependent on the direction of the stimulus in the case of nastic movement but in the case of tropic movement, the response is dependent on the moment.

why do cells need to copy their dna

Answers

Answer:

Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell.

Explanation:

Hope this helps. Have a nice day!

Explanation:

whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell.

What are the 3 main NATURAL processes of the carbon cycle?

Answers

Answer:

The Carbon Cycle

Carbon moves from the atmosphere to plants.

Carbon moves from plants to animals.

Carbon moves from plants and animals to soils.

Carbon moves from living things to the atmosphere.

Carbon moves from fossil fuels to the atmosphere when fuels are burned.

Carbon moves from the atmosphere to the oceans.

Hope This Helps

Which word helps clarify the meaning of the word invertebrates?

Answers

Answer:

Animal

Explanation:

Educated guess and got it right

Invertebrates are the classification of the Animalia that have species with no backbones. Animals are the word that clarifies the meaning of invertebrates. Thus, option D is correct.

What are Invertebrates?

Invertebrates are animals that lack a backbone or a vertebral column, unlike vertebrates. They are best described by animals as they are precisely their characteristic and is not seen in plants or other species. They are cold-blooded that include echinoderms, mollusks, arthropods, etc.

Therefore, animals clarify the meaning of invertebrates.

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The complete question is attached to the image below.

These are not in order, Can u please put them In order

Answers

Answer:

3 / 4 / 5 / 2/ 1

Explanation:

Hope this helps.

Place the organisms in order from simplest to most complex.
1.Animals
2.Eubacteria
3.Protists
4.Fungi
5.Plants
6.Archaebacteria

Answers

Answer:

The six kingdoms are Eubacteria, Archae, Protista, Fungi, Plantae, and Animalia. Until the 20th century, most biologists considered all living things to be classifiable as either a plant or an animal.

Explanation:

mark as brainiest

Animals eibacteria fungi

What are the thin fibers of the human nervous system called?.

Answers

Description of the nervous system
Neurons send signals to other cells through thin fibers called axons, which cause chemicals known as neurotransmitters to be released at junctions called synapses

Answer:

Axons should be your answer.

Explanation:

The individual thin fibers in which neurons send signals to other cells are axons. When individual fibers are bundled together, it is called nerve fiber.

Which of the following describes Aristotle's method of classifying organisms?
a. Aristotle categorized organisms as either plant or animal.
b. Aristotle created a hierarchy of life based on complexity.
c. Aristotle cataloged only animals and divided them into carnivores and herbivores.
d. Aristotle classified organisms based on geographic location.

Answers

Answer:

Aristotle created a hierarchy of life based on complexity.

this is the right answer unlike the other one

One autumn in the late 1990s, a number of people became ill after working at a single building at an industrial plant in a neighborhood of Baltimore, Maryland. Their symptoms ranged from simple coughing and other respiratory symptoms to pneumonia. At least one of the 70 people reporting symptoms died. He was 78 years old. The company voluntarily closed the building upon the recommendation of the Maryland Department of Health and Mental Hygiene. After all of the water systems at the plant were evaluated and disinfected, it re-opened and no new cases were reported.
1. Health departments often have less information than this when they start hypothesizing about the causative organism and its source. What is your first guess?
2. Describe the transmission characteristics of the suspected bacteria.
3. Is there a risk for a continuing community outbreak from these initial infections? Why or why not?

Answers

This disease is likely caused by a bacterium that was transported through the water. If water was infected only locally, likely, there are no outbreaks.

What can be guessed about the causative organism?

The causative organism seems to be a type of bacteria in water. This is because disinfecting the water systems seemed to be the problem, which shows the source was there.

How are these bacteria transmitted?

The suspected bacteria is transmitted through water. This seems to be the main transmission route because it seems workers experienced symptoms after drinking water.

Is there a risk for more outbreaks?

If only the water of the plant was contaminated with this bacteria, it is likely there are no outbreaks. However, if contamination was general, outbreaks might appear.

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The cold adapted coniferous trees that dominate here have the following key adaptations: (select all that apply) question 7 options: conical shape to helps the snow to distribute more evenly across the tree and also to fall to the ground and prevent branches from breaking pear shape to helps the snow to distribute more evenly across the tree and also to fall to the ground and prevent branches from breaking thin needles have less surface area and waxy cuticles to avoid water loss in the dry winds and in winter when most available water is frozen thick needles have less surface area and waxy cuticles to avoid water loss in the dry winds and in winter when most available water is frozen very shallow roots compared to other trees like we have here in ohio. very deep roots compared to other trees like we have here in ohio.

Answers

Conical shape helps the snow to distribute more evenly across the tree and also to fall the ground and prevent branches from breaking pear shape to helps the snow to distribute more evenly across the tree

and ,also to fall to the ground and prevent branches from breaking thin needles have less surface area.

How do conifers adapt to the cold?

They have several adaptations that help them grow in colder, drier conditions. Their needles are heavily cutinized. Their small surface area helps reduce evaporative water loss.

Thus, thee are the correct statement.

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please help fast i dont know what to do

25 points

Answers

The capital S is dominate genes, the lower case s is recessive genes. From here you should get your answer!

Which RNA molecule copies the DNA sequence into a polypeptide?

Answers

Answer:

RNA polymerase is the enzyme which transcribes the DNA into mRNA

Then the tRNA starts translating the mRNA into a polypeptide made of amino acids

Ap biology evolution why do some organisms evolve away organs

Answers

Because individuals in a population vary, some in the population are better able to survive and reproduce given a particular set of environmental conditions

A mother has hemophilia, and the father is unaffected. What is the probability that their son will have hemophilia? Their daughter?

Answers

Answer:

A 25% (one in four) chance of having a son with hemophilia. A 25% chance of having a son with normal blood clotting. A 25% chance of having a daughter who is a carrier. A 25% chance of having a daughter who has hemophilia.

Explanation:

In the extremely rare event that both the mother and the father have the affected X chromosomes then there is a 50% chance that their sons will be born with hemophilia. There will be a 50% chance their daughters will be carriers and a 50% chance they will also have the condition.

The term used for all floating and drifting organisms in the sea is:

Answers

Answer:

The answer is Plankton

Explanation:

A collection of tiny organisms living beneath the surface of lakes, rivers, ponds, and oceans across the planet are called plankton.The term Plankton is used for floating and drifting organisms in the sea.

What are plankton?

Planktons are organisms found in water that cannot float against the water current.

The word plankton is derived from Greek which means to drift and float.

Thus, the term used for all floating and drifting organisms in the sea is plankton.

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What happens to the lac operon when glucose and lactose are present

Answers

Answer:

If both glucose and lactose are both present, lactose binds to the repressor and prevents it from binding to the operator region.

Explanation:

How does the mutation rate affect the speed at which a population adapts to its environment?

Answers

Answer:

Under these conditions an increase in the mutation rate evolves, which allows faster adaptation to the spatial variation in local temperature, causing a faster range expansion across the spatial gradient.

Answer:

The mutation rate is the speed (or mutations per unit time) at which a sequence of DNA changes, either through natural means or artificially induced means. Natural selection is the way that a population of organisms evolve over time to adapt to their environment.

A predator inches across the hot Texas sand toward a horned lizard. In response, the lizard first puffs itself up to scare off the predator. When that doesn't work, the lizard squirts something out of its eyes. What is it?

Answers

They squirt blood from their eyeballs!

In what two ways did an understanding of geology influence darwin

Answers

Answer: Geology played a major role in Darwin's life and scientific work: The formation of volcanoes, the slow subsidence of coral reefs, the rising of the Andes by earthquakes, the fossil relatives to modern species in South America,

Explanation:

Which of the following is an example of a nonspecific immune response?

Answers

NON SPECIFIC DEFENSES: Skin and Mucous membranes, antimicrobial chemicals, natural killer cells, phagocytosis, inflammation and fever.
When you get better your cells in your body

How does the cell membrane aid the cell in maintaining homeostasis?
1. The cell membrane uses energy to remove waste products from the cell through sac-like packages.

2The cell membrane controls all cellular activities in response to changes in the external environment.

3The cell membrane assists with maintaining the correct temperature by absorbing energy.

4The cell membrane extracts energy from food when the cell is low on energy.

Answers

1. Should be the correct answer.

While number 2 is true in some sense, I don’t think it is appropriate to say that all cellular activities result from a response to changes in the external environment. Only some processes stem from signal transduction originating in the cell membrane.

The question is poorly written in my opinion.

Which of the following is an example of nonpoint source pollution? A) A leaking gas line B) industrial discharge C)storm water runoff D)an oil spill

Answers

Answer:

c.

Explanation:

they all are correct but c is he best answer

Answer:

just as the name implies. Storm does not have any specific place it coming from

An organism with the GG genotype would be

Answers

Answer:

Hom ozygous

Explanation:

organisms that have the same genotypes are Hom ozygous, while organism that have different genotypes (Gg) are Heterozygous

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View filters may be applied retroactively to any data that has been processed. a Write a letter to your brother telling him about the harms of junk food passes through (-2, 1) and (2, -5)I need to find the y=mx+b HELP ME WITH THIS . IF correct will get an brainliestHURRRY Josie grew bored after school, so she called Kate in search of an amusing? what is 698 352 nearest to 1000 (French) Fill in the blank please Shelly uses Fac3book to interact with friends and family online. When is she most likely to express a positive mood on social media?a. Sundays b. Wednesdays c. Fridays d. Thursdays When using the four-step process for organizing creative thinking, which step involves ideas beginning to flow? The movement of materials from the plasma membrane, through endosomes, and then to lysosomes describes which type of pathway?. Its pretty straight forward, (Questions in image) What is a claim in essay writing?Select one:Oa sentence or phrase that provokes an answera fact or piece of informationOa declaration that something is right or trueOan explanation for an action or event The blank contains the main idea in a paragraph Which word meaning sensible has the most negative connotation?A. practicalB. efficientC. reasonableD. stuffyE. down-to-earth Ms. Watts was a very practical person. She only bought comfortable clothes that were appropriate for work and for leisure. Her wardrobe consisted of only efficient items, which did not need much care. All of Ms. Watts' tops were white. All of her skirts and pants were gray, and all of her shoes were black. She had one warm winter coat that was also black. One day, Ms. Watts' friend invited her to go shopping. Ms. Watts needed a new pair of shoes; therefore, she accepted the invitation. Ms. Watts tried on a pair of black slip-on shoes with flat soles. The shoes were on sale at a very reasonable price. Ms. Watts' friend saw the plain black shoes and said, "Those shoes are extremely stuffy. Why don't you try on a pair of colorful but impractical sandals?" "I will get a lot more use out of these down-to-earth shoes than I would ever get out of those absurd sandals," Ms. Watts said as she carried the black flats to the register. An aluminum bar 3 feet long weighs 12 pounds. What is the weight of a similar bar that is 3 feet 4 inches long? where in our bodies are vitamins and minerals produced naturally The article primarily discusses how__________.A.Dr. Wu's intellect and passion for physics enabled her to make significant contributions to her fieldB.Dr. Wu's scientific achievements can be credited in part to the value her family placed on educationC.Dr. Wu switched her course of study from a teacher training program to physicsD.Dr. Wu was the seventh woman to become a member of the National Academy of Sciences What did you include in your response? check all that apply. an acknowledgement of the other participants opinion my opinion on the topic examples to support my opinion evidence from a text related to the discussion A bag contains 6 red marbles, 4 blue marbles, 7 green marbles, and 3 yellow marbles where can u buy a ruler that is 3 feet long