Halophiles are a type of and are considered lovers.
Answer:
Halophiles are archaea and considered the lovers of saline or salt.
Explanation:
Halophiles are included under the domain archaea and considered as extremophile organism. Some halophiles are included in the bacteria laso but the major halophiles are the archae.
Halophiles are included in archae as they do not contain well defined nucleus, endomembrane system is absent and cell wall is not made of peptidoglyan layer. Halophiles has the ability to tolerate the extreme saline conditions. They can be found in he area that contains salt concentration five or six times greater than ocean.
How do webbed feet help ducks survive?
A.) Webbed help ducks maintain homeostasis.
B.) Webbed feet help ducks keep their balance on land
C.) Ducks are birds, and many birds have webbed feet
D.) Webbed feet help ducks more efficiently thru water
Why do many desert plants have small leaves?
A.) Small leaves protect desert plants form pollution
B.) Leaves that have a small surface area lose less water
C.) Deserts are cold and small leaves help hold in heat
D.) Small leaves protect desert plants from animals that eat plants
How do a cat's teeth help the cat catch mice?
A.) Cat's teeth are sharp and help the cat keep a secure hold on its prey
B.) Cat's teeth are white and attract mice
C.) Cat's teeth are large and help the cat catch large animals
D.) Cat's teeth are not visible to mice at night
Answer:
ok so FIRST QUESTION IS D
SECOUND IS B AND
LAST ONE IS A
Explanation: hope this helps :3
What is the expected heart rate when a heart is removed from a living body?
Because plants do not have skeletons, what accounts for their rigidity?
What parts of the environment can control the size of a population?
A neuron will not respond to a second stimulus of equal strength to the first stimulus to which it has already responded because ___
A neuron will not respond to a second stimulus of equal strength to the first during its absolute refractory period because the voltage-gated sodium channels are inactivated. During the relative refractory period, a stronger than normal stimulus can trigger an action potential because the membrane is hyperpolarized.
A neuron will not respond to a second stimulus of equal strength to the first stimulus during the absolute refractory period, even if the stimulus strength increases. During this period, the voltage-gated sodium channels are inactivated and cannot reopen in response to a stimulus. However, during the relative refractory period, a neuron can fire a second action potential if the stimulus strength is stronger than usual because the neuron's membrane is hyperpolarized. Only when the neuron's membrane potential is restored to its resting state can it fire at its normal stimulus threshold again.
Stimulus strength is normally coded by the frequency of action potential firing, but during the absolute refractory period, the neuron cannot increase its firing rate regardless of stimulus strength. After this period, the cell requires additional time and stronger stimuli during the relative refractory period to reach the threshold for firing another action potential.
What happens to ground water when the rate of infiltration is less than the rate of water being pumped out of the ground
Which factors may help begin an ice age? Select all that apply.
A. volcanic eruptions
B. Earth's revolution around the Sun
C. increased oxygen in Earth's atmosphere
D. the clustering of continents near the poles
E. increased dust particles in Earth's atmosphere
F. increased carbon dioxide in Earth's atmosphere
Answer:
A. volcanic eruptions
D. the clustering of continents near the poles
E. increased dust particles in Earth's atmosphere
Explanation:
Ice age is the name given to the period where thick layers of ice cover large areas of the earth. These periods can last thousands of years and dramatically change the characteristics of the planet. There have been some very significant ice ages in the history of the planet. In the late nineteenth century, much research showed that there were several ice ages that alternated with interglacial periods.
Many scientists believe that we will live a new ice age in 2050. This ice age, though expected shortly, will bring catastrophic results to the life we know. One certainty we have is that if this ice age occurs, it will be caused by human interference with nature and all the degradation that man has caused to the environment. In addition, this ice age is likely to be triggered by the factors likely to cause an ice age: volcanic eruptions, clustering of continents near the poles and increased dust particles in Earth's atmosphere
The outer surface of a cell that controls what enters and leaves is called
Concept covered: recap and review answer each question to complete this review of all the stages of respiration
Cellular respiration involves converting energy from nutrients into ATP with waste products being released, occurring over three stages: glycolysis, the Krebs cycle, and the electron transport chain. The mitochondrion is vital for these processes. Respiration refers to breathing and includes ventilation and gas exchange, differing from cellular respiration, which is a metabolic process in cells.
Explanation:Cellular respiration is a set of metabolic reactions used by cells to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products. The three stages of cellular respiration are glycolysis, the citric acid cycle (Krebs cycle), and the electron transport chain.
The mitochondrion is a double-membraned organelle that plays a critical role in cellular respiration by hosting the citric acid cycle and electron transport chain. The large surface area provided by its highly folded inner membrane is critical for the reactions of cellular respiration that produce ATP.
For an organism lacking mitochondria, it would use a form of respiration such as fermentation, which does not require mitochondria and occurs in the cytoplasm.
The water vapor that condenses on a cold window pane when you exhale comes from the lungs as they expel water vapor that is a byproduct of cellular respiration.
Differentiating Between Respiration and Cellular Respiration
Respiration generally refers to breathing which involves the inhalation of oxygen and exhalation of carbon dioxide. It consists of two parts: ventilation and gas exchange. Cellular respiration, while related to breathing, refers explicitly to the biochemical process within cells that converts nutrients into energy.
Aerobic respiration is a type of cellular respiration that uses oxygen to produce ATP. The overall chemical reaction for aerobic respiration is C6H12O6 (glucose) + 6O2 (oxygen) → 6CO2 (carbon dioxide) + 6H2O (water) + energy (ATP). The four stages of aerobic respiration are glycolysis, the transition reaction, the Krebs cycle, and the electron transport chain and oxidative phosphorylation.
A lab rat had part of its hypothalamus destroyed. the rat seems to have lost all interest in food and won't eat even when food is available. it would appear that part of the _____ has been destroyed.
Final answer:
Damage to the lateral hypothalamus (LH) in a lab rat's brain likely caused the loss of interest in food, as the LH is integral for initiating hunger.
Explanation:
The lab rat that had part of its hypothalamus destroyed and subsequently lost all interest in food likely had damage to its lateral hypothalamus (LH). The LH is a crucial area in the brain for initiating hunger. Lesions in the LH can cause animals to lose their desire to eat, leading to self-starvation if not force-fed. Conversely, stimulating the LH can induce eating behavior when food is present. It contrasts with another region of the hypothalamus, the ventromedial hypothalamus (VMH), which is responsible for signaling satiety or the feeling of fullness that stops eating behavior.
Which microscope would be used to see pollen found on a suspect side by side with pollen from a crime scene?
A Scanning Electron Microscope would be ideal for analyzing pollen from a crime scene due to its high resolving power, providing a highly detailed view of the grains, and allowing for a more accurate comparison.
Explanation:
To analyze something as minuscule and detailed as pollen from a crime scene, a Scanning Electron Microscope would be ideal. This type of microscope allows for an extremely detailed view of the specimen. This is due to the fact that electron wavelengths are considerably shorter, up to 100,000 times than the wavelengths of visible-light photons, as shown in Figure 6.1 with an image of pollen. This allows for a detailed comparison of the pollen from a suspect and a crime scene side by side as their detailed features, like the sizes, shapes, and surface patterns, would be distinctly visible.
However, it is worth mentioning that different types of microscopy can be used depending on the specific requirements of the examination. For instance, brightfield microscopy offers clear images with good contrast, while darkfield and phase-contrast microscopes can provide further details as they increase contrast and make more intricate structures visible. But for the case of comparing pollen grains, electron microscopy stands as the most effective option due to its high resolving power.
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It is necessary to heat fix bacteria to the microscope slide. what happens when you pass the microscope slide through a flame a few times?
How do oil spills affect marine ecosystems?
A) Oil has nutrients that are useful for marine plants.
B) This has no lasting effect, as the oil evaporates in a few days.
C) Marine animals absorb the oil through their skins and store it as fat.
D) Marine organisms die because oil stops oxygen from entering the water.
hint : oil floats on water.
Answer:
The answer is D) Marine organisms die because oil stops oxygen from entering the water.
Explanation:
The oil spill results in the death of many marine beings, due to the contaminants of the oil compounds that are tremendously toxic. Due to the oil film, the oxygen content in the water is reduced, which causes the asphyxiation of the fish, since they need oxygen to live, which comes from the water, that by the gills, retains the present oxygen and distributes it through the circulatory system through the body.
Which element IS found in proteins, but NOT found in carbohydrates?
The body structure of a reef -building coral consists of a hard skeleton covering soft tissue. What element is most common in the corals soft tissue?
Of all prescription drugs, the most often abused are
what substance is analogous to a factory manager?
science cannot be used to answer questions of good or evil. true or false
Answer:
The correct answer is - True.
Explanation:
Science is a method that explains any natural phenomenon by repeatedly experimenting and observation. It includes different branches in it such as math, biology, and physics.
Science can not answer if any process or phenomenon is evil or good. It can not answer ethical questions such as GMOs are ethical or cloning is ethical. It only can give an idea about the repercussion of a particular question on the base of facts.
Thus, the correct answer is - true.
During which period of pregnancy may drug exposure cause meromelia, cleft lip, and enamel hypoplasia?
Meromelia(Malformed limbs): The critical period
is 20-36 days after fertilization or the first trimester when the
organs are just beginning to develop. Drugs such as thialides should be
avoided.
Cleft Lip with/without Cleft Palate: Usage of drugs such as topiramate
and valproic acid, during the first 3 months of gestation increases the
risk of having a baby with this defect.
Enamel Hypoplasia(teeth enamel is hard but thin): The use of tetracyclines
can cause this, as well as yellow-to-brownish discoloration of the teeth.
It is important to avoid such drugs during the 2nd and 3rd trimesters.
The cerebral cortex plays a major role in our emotions because it _____.
The cerebral cortex plays a major role in out emotions because it plays a role in the capability to identify and control emotions. The Cerebral Cortex is composed of tightly packed neurons and is the creased, outermost layer that surrounds the brain. It is also accountable for higher thought progressions including speech and decision making . The cortex is divided into four different lobes, the frontal, parietal, temporal, and occipital, which are each responsible for giving out different types of sensory data.
Which series of labels correctly identifies the indicated structures of this sketch of a cell under a microscope? If you need the answers it will take a while.
A: The right answer is Vacuole
Vacuoles are organelles present in plant cells. It is a large single structure, of variable shape according to the cells, delimited by a lipid membrane called tonoplast.
The vacuoles allow the storage of water, ions, sugars, ... and by magnifying, play an important role in the growth of the plant.
B: The right answer is Mitochondria
Mitochondria are organelles present in eukaryoptic cells. The mitochondrion is composed of a double membrane, the inner membrane being folded into mitochondrial ridges.
Mitochondria are the organelles that produce the energy of the cell. The mitochondria thus have a role of power station for the cell. They are the ones who perform cellular respiration.
C: The right answer is Cell membrane (the inside layer)
All cells (prokaryotic and eukaryotic) are separated from their environment by a palsmic membrane.
The plasma membrane is the line of demarcation between the cell and its environment (= envelope of the cell).
It determines what goes into the cell and what comes out of it. Like all biological membranes, the plasma membrane has a selective permeability, that is to say it is allowed to pass through certain substances more easily than others.
The plasma membrane consists of a double lipid layer in which proteins are inserted.
D: The right answer is Chloroplast
Chloroplasts are important organelles specific to plant cells. Chloroplasts appear green ... They contain chlorophyll, a pigment that captures solar energy.
Choroplasts perform photosynthesis, that is, they absorb sunlight and use it for the manufacture (synthesis) of organic compounds from carbon dioxide and water.
E: The right answer is Lysosome
The lysosome is a small spherical structure (a vesicle) delimited by a lipid membrane located in the cytoplasm of eukaryotic cells. The membrane contains ion channels (proton pumps) that allow the active entry of H + ions, in order to maintain an acid pH (between 3.5 and 5) within the lysosomal vesicle.
Lysosomes are organelles of eukaryotic cells that contain a mixture of digestive enzymes used to degrade macromolecules.
Lysosomes are considered the "stomach" of the cell.
F: The right answer is Endoplasmic reticulum
The endoplasmic reticulum are organelles of eukaryotes that extend throughout the cytoplasm (like a labyrinth). These are organelles that produce proteins and play a vital role in the development of the other membranes of the cell.
Which takes more time to recover, primary succession or secondary succession?
How would you distinguish a just action from an unjust action?
A just action is having to do a certain action that is right or means of having to follow the law that is established and without having to break the rules while an unjust action is having to perform an action or behavior that are named or labelled to be a wrong as a matter of doing bad things or breaking the rules that should be followed.
A high rate of evaporation and condensation in the water cycle can most likely cause
a. floods
b. blizzards
c. earthquakes
d. hurricanes
A high rate of evaporation and condensation in the water cycle can most likely cause hurricanes. This is because these conditions imply the transfer of a lot of heat energy, which can fuel the development of severe weather systems like hurricanes.
Explanation:A high rate of evaporation and condensation in the water cycle can most likely cause hurricanes (option d). The water cycle involves the continual movement of water on, above, and below the surface of the Earth. During this cycle, water changes states among liquid, vapour, and ice. As part of this process, heat is transferred from the Earth's surface to the atmosphere, creating conditions for weather phenomena. When there is a high rate of evaporation and condensation, it means there is a lot of heat energy being transferred which can spur the development of severe weather systems like hurricanes. Hurricanes are essentially large, organized systems of thunderstorms and require warm, moist air as fuel, which is provided by the high rates of evaporation and condensation.
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Who was the first scientist to discover cells with the use of a homemade microscope?
Carolus Linnaeus
Robert Hook
Rudolf Virchow
Theodor Schwann
Answer:
Robert Hooke
Explanation:
The cell was first discovered by Robert Hooke in 1665. He observed a slice of a cork cells under a crude or a primitive microscope. He observed the dead cells of a cork. For the first time, Leeuwenhoek in the year 1674 discovered the living cells in pond water for the first time with an improved microscope.
Both molecule a and molecule b are classified as __________.
Both molecule a and molecule b are classified as lipids. The correct option is B.
What are lipids?Lipids are fatty substances that have many different jobs to do in your body. They are a component of your cell membranes and aid in regulating what enters and exits your cells.
They aid in producing hormones, absorbing vitamins, and transporting and storing energy. Having too many lipids can be dangerous.
A vital part of the cell membrane are lipids. Typically, the structure consists of a glycerol backbone, two hydrophobic fatty acid tails, and a phosphate group (hydrophilic). Phospholipids are hence amphipathic.
Triacylglycerols, sometimes referred to as triglycerides, phospholipids, and sterols, are the three primary categories of lipids.
Thus, the correct option is B.
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Your question seems incomplete, the missing options and missing image is:
A. Nucleic acids
B. Lipids
C. Carbohydrates
D. Proteins
Molecule A and B are stereoisomers, specifically enantiomers, which are nonsuperimposable mirror images with identical physical properties but different interactions with polarized light and chiral molecules.
Both molecule A and molecule B are classified as stereoisomers. Stereiosomers are molecules that share the same molecular formula and bonding arrangement but possess a different spatial arrangement of atoms. Specifically, A and B are a type of stereoisomers called enantiomers, which are nonsuperimposable mirror images of each other. A chiral molecule (one that has a non-superposable mirror image, like a left and right hand) will have one enantiomer, and together they form an enantiomeric pair. The physical properties of enantiomers, such as melting point, boiling point, and density, are identical, but they differ in their interaction with polarized light and other chiral molecules, such as proteins. This difference is foundational in biological organic chemistry where the interaction with chiral biological molecules can lead to drastically different biological responses.
The enzyme amylase in human saliva breaks down starch polymers into smaller sugar units. however, it cannot break down cellulose polymers. both are made of glucose monomers, but in cellulose the monomers are linked together in a different shape than in starch. why can't amylase digest cellulose
Amylase cannot digest cellulose because the beta 1-4 glycosidic bonds in cellulose have a different stereochemistry than the alpha 1-4 glycosidic bonds in starch. While amylase works on starch, it is not configured to interact with cellulose, which instead passes through the digestive system as fiber.
The enzyme amylase is responsible for the breakdown of starch polymers like amylose into smaller sugar units like glucose and maltose. Amylose is a polysaccharide made of glucose monomers linked by alpha 1-4 glycosidic bonds. Salivary amylase can cleave these specific bonds, which are in a 'straight' configuration, allowing for the digestion of starch starting in the mouth and continuing in the small intestine.
However, cellulose is a different kind of polysaccharide also made of glucose monomers, but here, the monomers are linked by beta 1-4 glycosidic bonds. This different bond results in a 'flipped' stereochemistry compared to the alpha linkage in starch. Enzymes, including amylase, are highly specific and sensitive to the structure of the molecules they act on. As a result, the enzyme amylase cannot break the beta 1-4 glycosidic bonds in cellulose due to their different stereochemistry. While amylase facilitates starch digestion, it is ineffective on cellulose, which passes through the human digestive system as dietary fiber. Other enzymes such as cellulases found in nature can break down cellulose, but humans do not produce these enzymes.
suppose four atoms of oxygen gas and two atoms of hydrogen gas are combined. Determine how many atoms of water and oxygen gas will be produced.
Answer:
1 Water; 3 free oxygen
Explanation:
Since the water molecule (H₂O) consists of two hydrogen atoms and one oxygen atom.
By combining four oxygen gas atoms to two hydrogen gas atoms, as described in the question, covalent bonding between the two hydrogen atoms with one oxygen will occur, leaving three free oxygen atoms for further reactions.
The reaction that forms water molecules can be described as follows:
2H₂ + O₂ = 2H₂O
Where does glycolysis occur?
A) cytoplasm
B)mitochondrion
C) nucleus
D) cell membrane