Answer:
D) bilayer membranes
Explanation:
Two lipidic bilayers compose the cell membrane. There are also proteins and glucans incrusted in between. Lipids are amphipathic molecules with hydrophilic heads -negatively charged phosphate group- and hydrophobic tails. Lipids are arranged with their hydrophilic polar heads facing the exterior and the interior of the cells, while their hydrophobic tails are against each other, constituting the internal part of the membrane. Membranes are fluid, which means that the composing molecules can move through them.
Lipids can easily change places with other neighboring lipids by lateral diffusion in the same layer. This is passive diffusion, which means that it does not need energy to happen.
Lipids can also diffuse transversally to the other layer but not as easily as lateral diffusion. Jumps between monolayers are infrequent as the lipidic polar heads meet the fatty acid barrier.
There are also other lipidic movements as rotational diffusion that imply the rotation of the molecule.
An important species of an Atlantic ocean community is the giant kelp, which helps form a suitable habitat for
fish and marine invertebrates.
Which of the following best describes the role of giant kelp in its ecosystem?
Choose 1 answer:
A dominant species
A pioneer species
A foundation species
An invasive species
Answer:
The giant kelp is a foundation species in its ecosystem.
Explanation:
The kelp acts as a home to the fish and the marine invertebrates, so they can be best described as a foundation species, or species that make an ecosystem suitable for a group of other species.
Answer:
from khan academy :)
Se podría afirmar que las aletas anteriores de las ballenas se pueden comparar con estructuras similares de organismos terrestres?
Answer:
Las aletas de una ballena y el brazo de un hombre son un ejemplo de órganos homólogos, porque la estructura ósea de las aletas de una ballena es parecida (homóloga) a la estructura ósea de nuestros brazos, debido a que ambas proceden del mismo origen embrionario pero se han modificado para desempeñar funciones ...
Match the following iron-related terms with their definitions. - Dietary iron derived from hemoglobin and myoglobin in food - Iron from plant sources, supplements, and animal tissues other than that provided by hemoglobin and myoglobin - Iron-containing protein in red blood cells that transports oxygen and carbon dioxide - Percentage of blood made up of red blood cells - Disorder of iron metabolism that leads to abnormally high iron absorption and deposition of iron in the liver and heart A. Hemoglobin B. Heme iron C. Nonheme iron D. Hemochromatosis E. Hematocrit
Answer:
Thats easy!
Explanation:
Which of the following is an input for cellular respiration? a CO2 b. H₂O C. sunlight d O2
Answer:
Cellular respiration inputs are glucose and oxygen. The answer is O2.
Explanation:
Cellular respiration happens inside mitochondria. Meanwhile, the output is carbon dioxide, water, energy, and (ATP) adenosine triphosphate. It is a chemical process to extract nutrients and release waste substances.
ways in which soil organisms such as earth worms improve soil fertility
Answer:
by eating organic matter in the soil and excreting castings that are rich in nitrogen, phosphorus, and potassium which make the soil nourishing.
What are the pigments in cyanobacteria used for?
Answer:
Pigments are useful to plants and other autotrophs
Explanation:
Not sure, but hope this helped a bit
what type of transport takes place when a protien allows an ion to enter a cell, but no additional energy is needed to make this happen?
Answer:
The answer is facilitated diffusion. It requires no energy because the ions are traveling down the concentration gradient. Facilitated diffusion is important for the regulation of ions in a cell. It also enables ions to pass across the hydrophobic layer of the cell membrane composed of phospholipids.
¿Qué acciones podrían realizar para poder reducir los gases de efecto invernadero como el Co2?
AYUDA POR FAVOR
DOY CORONITA Y 5 ESTRELLAS
Explanation:
Ser conscientes del impacto de las emisiones de CO2. ...
Reducir el uso del coche privado. ...
Practicar una movilidad sostenible. ...
Aumentar nuestra eficiencia energética. ...
Consumir energía renovable. ...
Seguir una dieta con baja huella de carbono. ...
Convertirse en un consumidor sostenible.
Más elementos…
explain how oxygen is used by the body in cellular respiration and explain how carbon dioxide is a waste product of this process.
Explanation:
During cellular respiration the cell uses oxygen to break down sugar. Breaking down sugar produces the energy your body needs. ... Carbon dioxide is the waste product of cellular respiration that you breathe out each time you breathe. Blood picks up oxygen and releases carbon dioxide in the lungs.
hope it helps you pls mark me as branliest If you're kind enoughPlease list answers below
A car burns gasoline as it moves down the road. Which energy transformation
is the car performing?
A. Kinetic energy to chemical energy and light energy
B. Potential energy to sound energy and nuclear energy
C. Chemical energy to kinetic energy and thermal energy
D. Thermal energy to kinetic energy and nuclear energy
Answer:
A
Explanation:
After the completion of the polypeptide synthesis, the protein will be in its
structure.
A.primary
B.secondary
C.tertiary
D.quaternary
Answer:
B. secondary
Explanation:
Which substance, maple syrup or vegetable oil, has a higher viscosity? Explain how you know the answer.
Answer:
maple syrup
Explanation:
This is because viscosity is simply the resistance of a fluid to flow. A thicker fluid is more resistant than a lighter one. In this case maple syrup is thicker than vegetable oil thus more viscous than it.
What is the end product of glycolysis ?
Answer:
pyruvate
Explanation:
Explanation:
The final product of glycolysis is pyruvate in aerobic settings and lactate in anaerobic conditions. Pyruvate enters the Krebs cycle for further energy production.
Name five types of evidence that support the theory of evolution. Write one sentence for each, explaining why it demonstrates evidence. (10 points)
The five evidences that support the theory of evolution are: Fossils, Anatomy, Embryology, Molecular Biology (or Biochemistry), and Biogeography.
Fossils show the physical change in a species over time, suggesting evidence for evolution. For an example, we can trace the origins of dolphins and whales all the way to a four-legged, dog-like hoofed mammal from about 50 mya. These mammals were fish eaters and so decided to spend a lot of time in the water. In fact, they spent so much time in the water, that in a few million years, they evolved a longer body and webbed feet. Then another few million years passed and they swapped their webbed feet for flippers and swapped their tail of a fin. Eventually, we get a fish-like mammal that once walked on land.
For anatomy, or structures, there's three types of structure comparisons: Homologous structures, Vestigial structures, and Analogous structures (or Convergent Evolution). Homologous structures show similarities between the structures between species, but serve different purposes. For an example, all mammals share common features within their arms, such as having 5 fingers. However, they serve different purposes, from whale fins for swimming, to bat wings for flying, to human hands for grabbing and for using tools.
Vestigial structures were structures that once served a purpose and have been reduced in size/power to the point where it's useless. For an example, large theropods such as the T. Rex spent so much time evolving more jaw muscles and biting power, that they sacrificed their arm muscles for such power. This explains why their arms were so short.
Another example would be ratites, flightless birds such as ostriches, emus, and cassowaries (penguins and kakapos are from a different group). They spent so much time evolving powerful legs as well as evolving in size, that there was no need to fly when they could just run with their improved legs. And also the fact that they're too heavy to even fly anyways.
Analogous structures is the similar functions of structures between species, but have separately evolved these functions. For an example, the wings from insects, birds, bats, and pterosaurs are very similar in shape and can be used to fly, but they've evolved separately. For an example, birds use feathers to fly while bats and pterosaurs use/used (pterosaurs are extinct) membrane between their bones to fly. Although they do have strikingly similar evolutionary histories, with their ancestors starting off as tree dwellers, they've evolved their flight abilities separately during different earth periods.
Embryology is evidence for evolution by using embryos from different species to suggest a common ancestor. For an example, we can prove that we're more related to whales than to fish by using embryos. The fish embryo will evolve gills while the embryos of humans and whales will not, since we do not breath by extracting oxygen from water.
Molecular biology is a more recent way of providing evidence for evolution. By taking the DNA from cells from different species, we can get an estimate of how related one species is to another. The more similar amino acid sequences are between species, the more recent their common ancestor is. For an example, by comparing amino acid sequences between humans and chimpanzees, we get an estimated amount that we once shared a common ancestor seven million years ago. Without molecular biology, we would still be digging for fossils to find that number.
Biogeography is the geographic distribution of species on earth that can be explained by evolution. For an example, we can tell that Australia separated first from Pangea rather than Asia or North America since Australia doesn't have bears while the Asia and North America do, with China having pandas and North America having brown and black bears. And also with the fact that Australia is the only continent with monotremes (egg-laying mammals like the platypus).
Similar to biogeography, there's also direct observation, which is evolution that has happened in our own eyes. An example would be the underground London mosquito. Mosquitoes usually target birds like pigeons. But after an underground tunnel was built in London, some mosquitoes managed to get inside and instead of birds, they targeted, mice, rats, and of course, humans. After only a few hundred years, a mosquito from the underground tried to mate with another mosquito from land and they could not, simply because they were different species. This shows that their new choice of feeding on mammalian blood has actually altered their DNA and created a new species, during the existence of humanity!
Hi, guys so I'm doing an experiment and need help finding out the types of variables. In my experiment, I am using a narrow straw, a wide straw, and some colored water to find out how different variables affect capillary action. I'm trying to find out what is the controlled variable, independent variable, and dependent variable.
Answer:
Controlled variable=coloured water
Dependant variable=amount of water
Independant variable=narrow and wide straw
Explanation:
Have a nice day
Answer:
The controlled variable is straws. Independent it the water and dependent is the capillary action.
Explanation:
The Independent variable is the water because its not chaninging thorughout the experiment and has no conqueunces on the other varibales. The controlled is the straws because you are controlling the different diameters in which the straws are (narrow/wide). Then as you change your controlled variable your dependent varible will change- which is the affect on capillary action.
Hope this helps.
In garden peas, the allele for tall plants is dominant over the allele for short plants. Imagine that a true-breeding tall plant is crossed with a short plant. Then one of their offspring is test crossed. Out of 20 offspring resulting from the test cross, about how many should be tall
Answer:
10
Explanation:
The allele for tall plants is dominant over the allele for short plants. A true-breeding tall plant is crossed with a short plant, and one of their offspring is test crossed. Out of 20 offspring resulting from the test cross, about 10 and should be tall.
why is the product MILO not a suitable for a vegan diet
MILO and MILO products may not be suitable for a vegan diet due to:
MILO and its products consist mainly of cocoa, malt barley, sugar, and milk powder. Milk powder essentially comes from animals.A vegan is a person whose lifestyles exclude animal products, especially when it comes to diets. A vegan diet primarily consists of plant and plant products.Hence, the fact that MILO consists of powder milk which is animal-based might make it unsuitable for a vegan diet.
More about vegan diets here: https://brainly.com/question/16160533
Answer:
Explanation:
VEGAN DIET
A Vegan diet refers to diet that contain food from plants such as maize , beans, rice, wheat e.t.c It is mainly plants source and does not contain animal source.
But MILO is also Plant based energy and it contains several vitamins and minerals to help grow a healthy body: It contain Vitamins B2 and B3 which help to support effecient energy release in the body. It contain Essential nutrients like iron, zinc which are very minute
in plant based diets. Milo contain milk which is of animal source.
Therefore, Milo product is not suitable for a vegan diet because it contains milk solids which is derive from animal source.
Though plants, fungi, and prokaryotes all have cell walls, we place them in different taxa. Which of these observations comes closest to explaining the basis for placing these organisms in different taxa, well before relevant data from molecular systematics became available?
Answer:
Due to other differences.
Explanation:
The plants, fungi, and prokaryotes all have cell walls, we place them in different taxa because of the other differences such as mobility, mode of nutrition etc. Plants and fungi are not mobile means can not move from one place to another whereas prokaryotes are mobile. Fungi and prokaryotes are heterotrophs means that feed on other organism whereas plants are autotrophs means make their own food. There is also difference in their cell wall i.e. the cell of plants is composed of cellulose, the cell wall of prokaryotes especially bacteria is composed of peptidoglycans and the cell wall of fungi is composed of chitin.
Two lizards with different coloring exist within the same ecosystem. One lives in the trees, and the other prefers hiding among rocks. They are separate species because
they behave differently
Othey have different characteristics
Othey cannot successfully reproduce
Othey exist within the same ecosystem
Natural selection is that the process through which populations of living organisms adapt and change.
What are the adaptations behavior in organisms?
Many animals are well adapted to biotic and abiotic conditions due to behavioral, physiological, or structural adaptations that increase their chances of survival and reproduction.
Behavioral - responses made by an organism that help it to survive/reproduce..
Physiological - a bodily process that helps an organism to survive/reproduce.Structural - a feature of an organism’s body that helps it to survive/reproduce.Thus, we can conclude that the correct option is (b).
They are separate species because they cannot successfully reproduce.
which means they have different adaptation methods.
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What energy using-process helps to cool the body
Answer:
Convection
Explanation:
convection is the process of losing heat through the movement of air or water molecules
Which of the following is NOT an argument used against genectically modified food?
(A) It is new technology that unnaturally breaks genetic barriers between species
(B) It might cause allergic reactions
(C) Humans should not be designers of life
(D) All of these arguments are used
Answer:
(D) All of these arguments are used
Which of the following statements about biomolecules is true?
I. Biomolecules are the basis of life.
II. Biomolecules are involved in the metabolic processes of all living organisms.
III. Biomolecules are inorganic molecules.
Which would make for a weak claim?
• a blog cited as the source
• a large sample size
• clear variables and controls
• multiple trials
Answer:
A
Explanation:
Blogs can have a lot of misinformation
Which molecules in your body do
not contain carbon atoms?
Genes, which are made of DNA
Proteins
Sugars
Water
I'm pretty sure its water
The fruit of the mistletoe, a parasitic angiosperm, is a one-seeded berry. In members of the genus Viscum, the outside of the seed is viscous (sticky), which permits the seed to adhere to surfaces such as the branches of host plants or the beaks of birds. What should be expected of the fruit if the viscosity of Viscum seeds is primarily an adaptation for dispersal rather than an adaptation for infecting host plant tissues
Answer:
We should expect that the fruits should grow in population and spread more easily.
Explanation:
Like the relationship between bamboo and pandas, the relationship between the seeds and the beaks of birds should allow the seeds to spread to other areas more easily that would otherwise be a very gradual process if the seeds did not evolve its viscous ability.
How does variation contribute to evolution?
A. Variation changes an organism over time, allowing them to evolve slowly as they grow.
B. Variation does not contribute to evolution.
C. Variation causes changes in the DNA, some of which are passed on, changing the species slightly each generation.
D. Variation produces a great variety of advantages for natural selection to select, through the process of Mitosis.
Answer:
I think its A
Explanation:
Variation usually results in changes in the DNA which are passed on the future generation and changing the species slightly each generation. The correct option is C.
What is variation?The disparity in the character traits of organisms in a population is referred to as variation.
Different traits can be introduced into an organism by genetic variations that alter gene activity or protein function.
Thus, the correct option is C.
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The molecules of water move farther apart in the water cycle and water changes from the?
Explanation:
I think the ans is evaporation
Which of the following describes the feedback that controls the blood pressure in the human
body?
O
When blood pressure drops, hormones from the pancreas tell the heart to beat
more strongly and increase the volume of blood flowing.
When blood pressure drops, hormones from the pancreas tell the heart to beat
more slowly and decrease the volume of blood flowing.
When blood pressure drops, receptors in blood vessel walls tell the heart to beat
more slowly to decrease the volume of flowing
ဝod
When blood pressure drops, receptors in blood vessel walls tell the heart to beat
more strongly and increase the volume of blood flowing.
Answer:
I believe D!!
Explanation:
hope this helps :)
The feedback that controls the blood pressure has ben the dropping of blood pressures has been mediated to the slowly decrease the volume of blood flowing. Thus, option C is correct.
What is blood pressure?The pressure of the blood in the circulatory system is often measured for diagnosis since it is closely related to the force and rate of the heartbeat and the diameter and elasticity of the arterial walls.
Heart failure is common in patients with high pressure. The body’s blood pressure is a measure of the pressures within the cardiovascular system during the pumping cycle of the heart.
In this case, the higher the cardiac output, the higher the volume of the blood in the vessels. Therefore, this increases the pressure in the vessels.
So, that when blood pressure drops, receptors in blood vessel walls tell the heart to beat more slowly to decrease the volume of the blood flowing. Thus, option C is correct.
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A researcher is examining a sample of smooth muscle tissue under a microscope. Which of the following would correctly describe what he sees? (2 points)
Short cells with no striations and one nucleus per cell
Long cells with no striations and one nucleus per cell
Long cells with striations and no nuclei
Short cells with striations and no nuclei
