I believe the answer is A
Answer:
A) mitochondria
Explanation:
Prokaryotic cells are the ones that lack membrane-bound well define the nucleus. They also lack the membrane-bound organelles such as mitochondria, Golgi apparatus, etc. These cells have a cell membrane and their DNA is present in the cytoplasm in the nucleoid region. So, a primitive anaerobic prokaryotic cell can not have mitochondria which are a characteristic feature of eukaryotes.
How fast can a turbidite bed form?
a matter of minutes
a matter of seconds
a matter of hours
a matter of years
The answer to this question is:
Turbidite bed can form in a matter of hours.
Turbidite can't form in the matter of minutes.
Turbidite can't form in the matter of seconds.
Turbidite doen't take that long to form.
Turbidite bed takes hours to form.
I hope this helps! :)
Have a wonderful day!
-LizzyIsTheQueen
Answer:
in a matter of hours
Explanation:
How is diversity related to changes in the ecosystem?
Diversity within an ecosystem allows for variation in the species and environment interact with each other.
Diversity within an ecosystem allows for variation in the species and environment interact with each other.
Infer how an organism, like a polar bear, might interact with each of earth’s 5 spheres.
The five earth's spheres are biosphere, hydrosphere, atmosphere, geosphere and lithosphere.
An organism like polar bear might react with each of the sphere in the following way: The bear has its habitat on the land (lithosphere), he eat grasses and other small animals found in the biosphere. It drinks water, which is part of the hydrosphere. It breaths in oxygen and breath out carbon dioxide into the atmosphere. Its wastes is a source of food to decomposers, ( in the geosphere) which breaks it down for plants' use
how do you ecologists measure the population density
Ecologists measure the population density by using the Quadrat method and the Mark and Recapture method.
Answer:
They use the method of marking and recapture.
Explanation:
The method of marking and recapture is the most common way that ecologists use to measure population density. To carry out this method, scientists must remove some members of the population and mark them in some way, so that they can be identified later. After correctly marking them, the members return to their original population, where they will mix with the other members of the population for a period of time determined by the ecologist. The important thing is that this time is enough for the marked members to mix with the rest of the population. While waiting for that time to pass, ecologists continue to capture and mark other members of the population until the recapture of the first marked members takes place. In this way, the size of the population will be estimated through the proportion of catches.
Which are examples of steroids
sorry but where are the examples?
How do muscle attachments affect a joint
Because they are attached to it.
muscle attachment to a joint helps that joint move in the correct direction, like your elbow...
What term best describes a group of cells that are similar and work together
A group of cells working together to do a job is called tissue.
Identify 3 reasons organisms need energy..
Organisms need energy to survive, as cells can't survive on their own without it. They need energy for growth, reproduction, movement, and repair. Hope this helps!
why dont electrons just fly off into space? what holds them in orbit around the nucleus
electrons don't just fly off into space because charged particles attract each other, keep in mind that alike particles repel off each other.
electromagnetic forces hold the electrons in orbit around the nucleus in the center of the atom. As they move in a repetive motion, they stay close together to stay in line.
Hope this helps!!
Fossil evidence suggests that whales evolved from land mammals. Using comparative DNA techniques, scientists have also suggested that whales are related to hippos. How could comparing amino acid sequences support the theory of evolution?
B i hope it help you
The amino acid sequencing sometimes reveals the ancestral evolution of the organisms.
What is meant by amino acid sequencing?Adaptive evolution at the molecular level can be studied by detecting convergent and parallel evolution at the amino acid sequence level. For a set of homologous protein sequences, the ancestral amino acids at all interior nodes of the phylogenetic tree of the proteins can be statistically inferred.
Inconsistent results on the association between evolutionary rates and amino acid composition of proteins have been reported in eukaryotes. However, there are few studies of how amino acid composition can influence evolutionary rates in bacteria. Thus, we constructed linear regression models between composition frequencies of amino acids and evolutionary rates for bacteria.
Compositions of all amino acids can on average explain 21.5% of the variation in evolutionary rates among 273 investigated organisms.
Thus, the amino acid sequences support the evolutionary patterns .
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what is the role of tropomyosin in skeletal musle
It is a protein that prevents a muscle contraction by wrapping around it
Tropomyosin is a protein in skeletal muscle that regulates muscle contraction by covering and uncovering myosin-binding sites on actin filaments. It uncovers these sites when calcium ions bind to the troponin complex, allowing muscle contractions to occur. Without ATP and calcium, tropomyosin returns to its state covering the sites, leading to muscle relaxation.
Explanation:Tropomyosin is a protein located in skeletal muscle that has a crucial role in muscle contraction. It winds around the chains of the actin filament and covers the myosin-binding sites to prevent actin from binding to myosin, effectively stopping premature muscle contraction. When muscle contraction is needed, calcium ions bind to troponin, a protein complex, and cause a change in shape that moves tropomyosin away from the myosin-binding sites.
This movement allows myosin to bind to actin and forms a cross-bridge, initiating muscle contraction. The cycling of cross-bridge formation and breakdown, powered by adenosine triphosphate (ATP), leads to muscle contraction. This process continues until calcium ions and ATP are no longer adequate, at which point tropomyosin returns to its position covering the myosin-binding sites, and the muscle relaxes.
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10 POINTS! science plz help me!
An increase in genetic variation
What percentage of the oceans floor is found in the abyssopelagic zone?
pick one
50%
63%
75%
The abyssopelagic zone is spread on the 83 percent of the total ocean water and it covers the 60 percent of the earth's surface.
the percentage of the oceans floor is found in the abyssopelagic zone is 63%
One way the body fights invaders is by increasing the body temperature or running a fever. Give a brief explanation as to why that defensive technique works against some viruses or bacteria.
An increase in body temperature has been known since ancient times to be associated with infection and inflammation and elevated body temperature changes the T-cells' membranes which may help mediate the effects of micro-environmental temperature on cell function
Answer:
Some of the species of bacteria do not possess the tendency to work adequately and replicate in the conditions of fever, that is, high temperatures. Thus, the high-temperature condition minimizes the rate of bacterial infections in the body. The majority of the research has also demonstrated that the temporal elevation in the body temperature, at the time of fever, enhances the activity of the cytotoxic T-cells, which plays a substantial role in fighting against the infection.
The original source of energy in most ecosystems is
i believe the answer is the sun
What is the role of tropomysin in skeletal muscle
~shooting star
~showers in the night sky
~originally chunks of rock and debris
~heated to incandescence by the friction of Earth's atmosphere.
The prompt above is describing what celestial body?
A)
asteroid
B)
comet
C)
meteor
D)
meteoroid
A meteor!
A meteor is a piece of debris that crashes at into the earth. Meteors can be seen on any given night, as they are simply interplanetary material falling into the earths atmosphere. Meteors reach about 3,000 degrees Fahrenheit, and travels at about 30,000 mph. :) Hope this helps!
The aforementioned phrases in the prompt above is describing this celestial body: C. meteor.
What is a meteor?A meteor can be defined as a celestial (astronomical) body that is formed as a result of its high speed entry into interplanetary space or Earth's atmosphere, thereby, producing shooting stars, light and other physical phenomena such as ionization, heat, shock.
In conclusion, a meteor is being described as shooting stars and they mainly showers in the night sky.
Read more on meteor here: https://brainly.com/question/11504264
How does the way matter cycles through an ecosystem differ from the way at energy flows?
Not similar to matter, flow of energy has a one way flow through living things. On the other hand, matter is recycled within and between ecosystems. Living things (ecosystems) need nonliving matter as well as energy. Matter is used to build bodies. It's also needed to carry out the processes of life. Any nonliving matter that living things need is called a nutrient. Carbon and nitrogen are examples of nutrients. Unlike energy, matter is recycled in ecosystems.
The ecosystem is a collection of communities of biotic and abiotic nature. The ecosystem channels energy in cyclic pathways and is unidirectional.
The matter is thus get recycled within and among the ecosystems. As every organism needs nutrients and energy to perform tasks. Like water, the nutrients are passed from one form to another such as from one tropic level to another.Learn more about the way matter cycles by an ecosystem differ from the way at energy flows.
brainly.com/question/12242820.
give an overview of 1-2 treatments for paralysis
>Physical therapy uses treatments such as heat, massage, and exercise to stimulate nerves and muscles.
>Occupational therapy concentrates on ways to perform activities of daily living.
>Mobility aids include manual and electric wheelchairs and scooters.
>Supportive devices include braces, canes, and walkers.
>Assistive technology such as voice-activated computers, lighting systems, and telephones.
>Adaptive equipment such as special eating utensils and controls for driving a car.
https://my.clevelandclinic.org/health/diseases/15345-paralysis/management-and-treatment
check the box next to the process or processes used by organism listed oak tree
Answer:
Oak trees performs cellular respiration and photosynthesis so both boxes should be checked
Explanation:
"Plants" (seaweeds are not strictly plants) all can perform photosynthesis, in which they use chlorophyll to convert solar elergy into chemical energy (glucose). But they can also carry out respiration which is the opposite process. In respiration glucose is broken down and its stored energy is released and used as fuel for the organism's processes.
Conversely, animals such as the housefly, the rabbit and the crab in the lower part of the image, can only perform respiration.
Answer:
You’re welcome
Explanation:
Which of the following statements about weather are accurate? select all that apply
E, D, B
Wind direction is given in terms of where its going and it's never possible to be 100% accurate with weather predictions :)
The accurate statements about weather are:
a. wind direction is given in terms of the direction it blows from.
d. humidity measures the amount of water vapor in the atmosphere.
e. Weather can be described by air temperature, air pressure, wind velocity, and rainfall.
Let's examine each of the statements about weather:
a. Wind direction is given in terms of the direction the wind is blowing from: This statement is accurate. For example, a north wind blows from the north.
b. Weather is a description of the average temperature and precipitation range of a region over time: This statement is inaccurate. That description actually defines climate, not weather. Weather refers to the short-term atmospheric conditions in a specific place at a specific time.
c. With the right tools, weather can be predicted with 100% accuracy five days ahead of time: This statement is inaccurate. Weather prediction is complex and subject to many variables, hence it cannot be predicted with absolute certainty, especially long-term predictions.
d. Humidity is a measure of the amount of water molecules in the atmosphere: This statement is mostly accurate but could be more precisely stated as the amount of water vapor in the air.
e. Weather can be described in terms of characteristics such as air temperature, air pressure, wind velocity, and rainfall: This statement is accurate. These elements are fundamental components used to describe the weather at a given time and place.
Based on the above analysis, the accurate statements are:
a. Wind direction is given in terms of the direction the wind is blowing from.d. Humidity is a measure of the amount of water molecules in the atmosphere.e. Weather can be described in terms of characteristics such as air temperature, air pressure, wind velocity, and rainfall.Identify the cell organelles found only in plant cells and those found in both animal and plant cells
Both= Nucleus,cell membrane,Golgi apparatus, ribosomes are found in Both plant and animal cell
Plant cell = have a cell wall, a large central vacuole, and plastids such as chloroplasts
hope this helps :)
Nuclear fission involves .........?
Combining atoms
Spitting atoms
Alternating atoms
Consuming large amounts of energy
Answer:
splitting atoms
Explanation:
Answer:
spitting atoms
Which is true of the population shown in this graph? A. It shows the effect of overpopulation on a species. B. The number of individuals will eventually drop to zero. C. The population has increased until it reached its carrying capacity. D. There are no limiting factors to control population growth.
The answer to this is C.
Answer:
The answer is C
Explanation:
The person on top of me is correct just if you're still not sure is this answer is correct or not.
Rebekka notices a huge crack in a large boulder in her garden she realizes the crack was caused by Frost wedging place the steps of the Frost wedging process in order
A. The freeze-thaw cycle continues to deepen the crack until the rock splits into 2 pieces
B. Rain water is stored in rock and seeps into a hairline crack during a rainfall
C. Because ice occupies more space than water, the ice wedges the crack open
D. Rainwater in the rock crack freezes into ice
E. The temperature falls below 0° Celsius
The correct order is:
B. Rain water is stored in rock and seeps into a hairline crack during a rainfall;
E. The temperature falls below 0° Celsius;
D. Rainwater in the rock crack freezes into ice;
C. Because ice occupies more space than water, the ice wedges the crack open:
A. The freeze-thaw cycle continues to deepen the crack until the rock splits into 2 pieces;
The water from the rain gradually manages to weather parts of the rock. As it does, small cracks appear in it. Once there's cracks, the water from the rainfall also starts to store inside the rock. When the colder period of the year comes, and the temperatures fall bellow 0°C, the stored water freezes. The ice starts to spread inside the crack, thus creating pressure inside the rock. As the pressure is becoming bigger and bigger, the rock will eventually crack into two or more pieces.
Answer:
Rain water is stored in rock and seeps into a hairline crack during a rainfall: It is probable that this rock had small fissures, by where the rain water infiltrated and was stored there.
The temperature falls below 0° Celsius: As previously stated, frost only occurs when the temperature of a region falls below 0 °C
Rainwater in the rock crack freezes into ice: At such a low temperature, the water present in the cracks of the stone froze
Because ice occupies more space than water, the ice wedges the crack open: When the water froze, it turned to ice and expanded in size. Ice takes up more space than water, so ice forced the small cracks in the stone to crack.
The freeze-thaw cycle continues to deepen the crack until the rock splits into 2 pieces: The freezing causes the ice to expand more and more and this deepens the cracks in the stone.
Explanation:
the earth surface is kept warm mostly by _______.A.hot lava B. the sun C. the moon D. many distant stars
B. The sun. It is the closest star to Earth. The moon does not heat up the Earth like at all. The distant stars are too far away to have an effect. The hot lava is in the Earth so it doesn't affect the surface.
name the 3 texas river that form borders and the neighboring states that they border
Sabine river. Red river. rio grande
The three rivers that form borders in Texas are the Rio Grande, Red River, and Sabine River, which border Mexico, Oklahoma, and Louisiana, respectively.
The three Texas rivers that form borders and their neighbouring states are:
Rio Grande - This river forms a natural border along the southern edge of Texas, separating it from the Mexican states of Chihuahua, Coahuila, Nuevo León, and Tamaulipas.Red River - It serves as the boundary between Texas and Oklahoma to the north.Sabine River - This river creates the border between Texas and Louisiana to the east.Each of these rivers plays a significant role in the geography of Texas, and they have also been important in historical contexts, such as the Texas annexation and border disputes.
Which is an accurate description of the processes used to turn the DNA code of a gene into a protein?
Answer:
Transfer RNA delivers specific amino acids to the ribosome, matching messenger RNA codons.
Mutations that neither benefit nor harm the organism have what
effect on the organism's survival?
Answer:
No effect.
Explanation:
The mutations that benefit the organisms increase their survival fitness while the mutations that harm them serve to reduce their survival. However, many mutations do not benefit or harm the organisms which means that they do not impart any positive or negative trait that could affect the survival fitness of the organisms. These mutations are neutral mutations.
Answer:
a neutral
Explanation:
look at the screen shot
Human beings are composed of progressively larger units of organization. Which unit of organization include all the other?
A. cells
B. organs
C. systems
D. tissues
The unit of organization that include all the other would be systems. Thus, the correct option would be C.
When it comes to living organisms, the various of levels of organizations are:
Cell: the basic unit of lifeTissues: aggregation of cells with similar functionsOrgans: aggregation of tissues with similar functionsSystems: collection of organs working together as a unit to perform a particular functionHence, the system is the highest unit of organization that include all other units of organization. From the system, cells, tissues, and organs can be located.
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