Answer:
1) All living things are made up of cells.
2) Cells are the building blocks/smallest unit of life.
3) All cells come from preexisting cells (cell division).
Explanation:
The three basic premises of the modern cell theory are as follows:
All living organisms whether plants or animals are made up of cells. A cell is the smallest unit of all living organisms.It is the basic structural and functional unit of organisms. Who proposed the cell theory?The cell theory was proposed by German botanist M. J. Schleiden and German zoologist T. Schwann in 1839. They proposed cell theory after studying numerous plants and animals.
Cell theory was further refined by German biologist Rudolf Virchow in 1855. According to him, all cells are arising from pre-existing cells. It may also be represented as "omnis cellula a cellula".
Till then all sorts of living entities are following all the three premises of the cell theory except virus.
Therefore, the three basic premises of the modern cell theory are briefly mentioned.
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how does the west nile virus spread?
Answer:
West Nile virus is most commonly spread to people by the bite of an infected mosquito. Mosquitoes become infected when they feed on infected birds. Infected mosquitoes then spread West Nile virus to people and other animals by biting them.
Explanation:
The genotype of an offspring defines the physical characteristics or
Answer:
phenotype
Explanation:
Answer:
Phenotype
Explanation:
Use the drop-down menus to answer the questions. In which stage of the cell cycle does the division of the cytoplasm occur? In which stage of the cell cycle does replication of DNA occur? In which stage of the cell cycle does the division of the nucleus occur?
Answer:
cytokinesis - interphase - mitosis
Explanation:
just took this on edge
In which stage of the cell cycle does the division of the cytoplasm occur?
✔ cytokinesis
In which stage of the cell cycle does replication of DNA occur?
✔ interphase
In which stage of the cell cycle does the division of the nucleus occur?
✔ mitosis
According to the article, what is the reason fungal diseases have been able to evolve and spread rapidly? animal activity increased plant species human activity decreased animal species
Answer:
Human activity
Explanation:
I read the article
Which of the following best explains why the number of organisms at each level decreases while moving up the energy pyramid? A. The animals at each level use energy, so only a small amount of their energy is available to the next level. B. The animals at each level have more predators, so they produce more offspring. C. The animals at higher levels are more competitive, so fewer animals survive. D. The animals at higher levels move more than animals at lower levels, so they require more energy.
Answer:
The animals at each level use energy, so only a small amount of their energy is available to the next level.
Explanation:
I did it on Study Island
An energy pyramid is a graphical representation of the energy in the trophic levels of an ecosystem. The animals at each level use energy, so only a small amount of their energy is available to the next level due to this, the number of organisms at each level decreases while moving up in the energy pyramid.
What is an energy pyramid?The energy pyramid shows the flow of energy from one trophic level to the other which is always upright.
The four levels of energy pyramids are:
Producers.Primary consumers.Secondary consumers.Tertiary consumers.The animals at each level use energy, so only a small amount of their energy is available to the next level. It means the energy is lost after each trophic level.
Due to this decrease in energy level at the successive levels, the number of organisms decreases while moving up in the pyramid of energy.
Thus, the correct option is A.
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Curly hair, large nose, brown eyes: our give the instructions that determine human traits, like these?
Antidiuretic hormone A) increases the permeability of the collecting ducts to water by increasing the number of aquaporins. B) is secreted in response to low potassium ion in the blood. C) causes the kidneys to produce a larger volume of very dilute urine. D) increases the permeability of the collecting ducts to water by decreasing the number of aquaporins. E) release is insensitive to the osmolarity of interstitial fluid.
Answer:
A) increases the permeability of the collecting ducts to water by increasing the number of aquaporins.
Explanation:
ADH is an hormone of the anterior pituitary gland concern with osmoregualtion. When the solute potential of the blood rises , with decrease in water potential , the water levels of the blood drops, the osmoreceptors in the hypothalamus sensed this from the circulatory blood and prompted the hypothalamus to stimulate the anterior pituitary gland to secrete ADH.
The hormone is carried in the circulating blood to the walls of the collecting ducts where it binds with the receptors on the walls of the tubule,which increases the fusing and binding of Aquaporins to the membrane of the collecting ducts to increase re absorption of water back into the blood, raising the water potential of the blood.
Answer:
The correct answer is option A) "increases the permeability of the collecting ducts to water by increasing the number of aquaporins".
Explanation:
Antidiuretic hormone, also known as Vasopressin, is a molecular messenger that stimulates water reabsorption in the kidneys. Antidiuretic hormone produce their effect by stimulating the synthesis and insertion of "water channels", known as aquaporins, into the membranes of the collecting tubules of the kidney. This increased number of aquaporins increases the permeability of the collecting ducts, which results in a greater water reabsorption in the kidneys.
What’s the study of the interactions between living things and their environment ?
Answer:
ExplanEcology is the study of how organisms interact with their environment, including both abiotic (non-living) and biotic (living) aspects of the environment. It is a very broad definition and the science of ecology tends to overlap other biological sciences.ation:
Answer:
Ecology
Explanation:
Ecology is the study of living things and their interactions with each other and their environment.
Why are organisms classified
Answer:
All living things are organized into groups by scientists as they are identified. ... Different scientists use various systems of classification to organize all living things into groups. Overall, the reason scientists classify living things is to understand the relationships between different organisms.
Explanation:
Liches and mosses have just begun to grow in a rocky area . What type of succession is occurring?
Answer:
primary succession
Explanation:
Answer:
primary succession is occurring
How much of the absorbed energy from the sun do plants store?
Answer:Most solar energy occurs at wavelengths unsuitable for photosynthesis. Between 98 and 99 percent of solar energy reaching the Earth is reflected from leaves and other surfaces and absorbed by other molecules, which convert it to heat. Thus, only 1 to 2 percent is available to be captured by plants.
Explanation:
The reabsorption of glucose occurs primarily through the walls of the
Options are not provided in the question. The complete question is as following:
The reabsorption of glucose occurs primarily through the walls of the
A. glomerular capsule.
B. nephron loop.
C. proximal convoluted tubule.
D. distal convoluted tubule.
E. renal duct.
Answer:
C. proximal convoluted tubule.
Explanation:
Reabposrtion of glucose is supported by the nephron present in the kidney which mainatain body fluid homeostasis. It maintains extracellular body fluid volume stable and also maintains the minerals and salts which are essential for body functioning. So, glucose reabsorption is a part of homeostasis.
The process of glucose reabsorption primarily starts through the walls of the proximal convoluted tubule. proximal convoluted tubule are covered in microvillii and are extensive in length which increases the surface area for absorption. it also contain densly packed mitochndria which provide energy for efficient reabsorption. and then they are tranposrted to proximal straight tuble fo rfurther filteration.
Hence, the correct otpion is C.
The reabsorption of glucose primarily takes place in the proximal convoluted tubule (PCT) of the kidney. Glucose binds with sodium to the symport proteins and is transported into the cell, then it's moved to the interstitial space by facilitated diffusion. Glucose reabsorption has a limit, when this is exceeded, additional glucose is excreted in urine.
Explanation:The reabsorption of glucose primarily occurs through the walls of the renal tubules, specifically the proximal convoluted tubule (PCT) of the kidney. The PCT part of the renal tubule facilitates reabsorption, where almost all nutrients including glucose are reabsorbed, either through passive or active transport.
Glucose binds simultaneously with sodium ions to symport proteins. Sodium then moves down its electrochemical and concentration gradient into the cell and takes glucose with it. Subsequently, glucose leaves the cell to enter the interstitial space by facilitated diffusion.
However, there's a transport maximum for glucose, represented by the total amount of glucose that the finite number of carrier proteins can handle. When the amount of glucose exceeds this transport maximum, the excess glucose is not transported and it is excreted from the body through the urine. This glucose excretion in urine is often seen in diabetic individuals, referred to as 'spilling glucose into the urine'.
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What happens immediately after pyruvate is brought into the mitochondrion?
A. Acetyl CoA forms.
B. 36 ATP molecules form.
C. Glucose molecules form.
D. FADH2 molecules form.
Answer:
The answer is A: Acetyl COA forms
Explanation:
You discover a new species of aerobic, mixotrophic protist that can perform photosynthesis in fairly deep water (for example, 250 m deep). It can also crawl about and engulf small particles. Which two characteristics does your protist have to have in order to successfully complete these tasks?
1. hydrogenosome
2. apicoplast
3. pseudopods
4. chloroplast from red alga
5. chloroplast from green alga
A) 1 and 2
B) 2 and 3
C) 2 and 4
D) 3 and 4
E) 4 and 5
Answer:
D) 3 and 4
Explanation:
Pseudopods is a tool for movement in many protists such as amoeba. Pseudopods is the extension of cytoplasm which enables the organism to move from place to place and capture the food by engulf small particles. This protists has chloroplast because chloroplast is responsible for the production of food materials from sunlight in the process of photosynthesis.
What are some facts about the coral reefs useful for a presentation
An ecosystem is self-sustaining as long as organisms have sufficient quantities of energy, oxygen, minerals, and water. When organisms die, some of these materials are recycled back to plants in the ecosystem primarily through the activity of:______.(1) predators (2) pathogens(3) decomposers (4) parasites
An endospore may survive a drought because it is protected by a
Answer:
b thick wall
Explanation:
a. hollow bridge.
b. thick wall.
c. plasma membrane.
d. plasmid replication.
An endospore may survive a drought because it is protected by a thick wall.
An endospore represents an extremely tough and dormant cell structure produced by some specific type of bacteria. The structures are resistant and primarily produced to ensure survival in the face of adverse environmental conditions.
Endospores are made up of the bacterial's DNA and ribosomes along with a large amount of a special type of acid that helps them to remain dormant - the dipicolinic acid. The entire structure is protected by a thick wall which contributes to their ability to survive tough environmental conditions.
The correct option is b.
Answer:
Thick wall
Explanation:
An endospore is a tough structure that is produced by some organisms like bacteria. It plays an important role in during environmental stress like drought, by enabling the survival of the bacterial cell during such stress and also making it highly resistant
A major feature of the endospore that aids resistance to environmental stress like drought is a thick wall called the cortex. This thick wall consists of specialized peptidoglycan, which makes the endospore highly resistant to highly resistant to high temperature.
By which processes are rocks broken up and moved to different locations?
A) Burial and cementation
B) Evaporation and condensation
C) Compaction and transportation
D) Weathering and erosion
Answer:
D.) Weathering and erosion
Explanation:
Weathering is the breaking down of rocks through (usually) natural processes such as rain, wind, etc.
Erosion is the process in which the sediments of these rocks are carried away through natural process.
At one time, all living organisms were separated into only two kingdoms—Animals and Vegetables. Once the microscope was invented and improvements in microscopy were made, however, more kingdoms were defined.
The Protist kingdom was established in 1866, and the Monera kingdom was added in 1938. The Monera kingdom was later subdivided into the Bacteria and Archaea kingdoms in the 1990s.
Fungi were classified as plants until 1969.
What is one reason why fungi were separated into a new kingdom?
A.
Fungi are able to undergo photosynthesis and make their own food. Plants get the nutrients that they need by consuming other organisms.
B.
Fungi are prokaryotic. Plants are eukaryotic.
C.
The cell walls in fungi are composed of chitin. Plant cell walls are composed of cellulose.
D.
All fungi are unicellular. All plants are multicellular.
Answer:
C. The cell walls in fungi are composed of chitin. Plant cell walls are composed of cellulose.
Explanation:
The correct option would be C, that the cell walls of fungi are composed of chitin while that of plants are composed majorly of cellulose.
Option A would not be the correct option because fungi are achlophyllous and as such, they are not able to photosynthesize. Plants are autotrophic and as such, they do not consume other organisms to get their nutrients (except the insectivorous plants.
Option B is incorrect because fungi are far from being prokaryotic. Their cells have nucleus and other membrane-bound organelles. Just like plants. fungi are also eukaryotic.
Option D would also be incorrect because Most fungi are multicellular, except yeasts which are unicellular. Some photosynthetic algae which can be considered plants are unicellular.
Plants and fungi differ mainly in their ability feeding habits. While plants can manufacture their own foods through photosynthesis, fungi cannot. Rather they carryout extracellular digestion of their foods before absorbing the digested materials.
Both plants and fungi also differ in their cell wall components. The cell walls of plants are made up largely of cellulose while that of fungi contain chitin.
The correct option is C.
Answer:
The cell walls in fungi are composed of chitin. Plant cell walls are composed of cellulose.
Explanation:
Both fungal and plant cells are eukaryotic, and they have cell walls. However, plant cell walls are composed of cellulose, whereas the cell walls in fungi are composed of chitin. Chitin is the same substance that is found in the exoskeletons of crabs, lobsters, and insects.
Another main difference between the plant kingdom and the fungus kingdom is that most plants are photosynthetic autotrophs (i.e., they make their own food by using energy from the Sun). A few plants, however, cannot undergo photosynthesis. Non-photosynthetic plants tend to be parasitic heterotrophs.
Although some fungi are unicellular (e.g., yeasts), most fungi are multicellular.
Fascioloides magna is an animal that lives in the livers of deer in the southeastern United States. It has a bilaterally symmetrical, flattened leaf-like body with a digestive tract with a single opening. It also lives in a snail for part of its life cycle. This animal is most likely a _____.
Answer:
Fluke
Explanation:
A fluke is referred to as trematode, a type of parasitic worm that belong to phylum plathyhelminthes. A fluke has a flattened body structure with about few centimetres long. Flukes do not possess an excretory system, but possess a digestive tract with just one opening that serves as both mouth and anus. Also, they do not posses respiratory organs .
Flukes possess a body surface that enables it inhabit the digestive system of larger animals and also avoid the effect of digestive enzymes.
These parasitic worms can be found to infect vertebrates and molluscs, such as snails. An example of a fluke is Schistosoma haematobium.
Pathogens that are catalase-positive, such as Mycobacterium tuberculosis, Legionella pneumophila, and Campylobacter jejuni, make catalase in order to deactivate harmful peroxide radicals, thus allowing them to survive unharmed within the host cell. Which of the following are features of the catalase enzyme?
a. endoenzyme
b. inducible
c. extracellular enzyme
d. constitutive
Answer:
B)inducible
C. )extracellular enzyme
Explanation:
Catalase is an enzyme that is engaged during the the decomposition of hydrogen peroxide to form water and oxygen, it is posses by all living organisms because of their exposure to oxygen, hence it protect the cell from oxidative damage by reactive oxygen species.
Catalase enzymes function in our liver by breaking down harmful hydrogen peroxide into oxygen and water ,during this reaction , the bubbles of oxygen gas that escape create a foam that will help to disinfect any surface touch by the raw liver during this process. Catalase enzymes are extracellular enzyme and are inducible.
Read the information in the Hospital Progress Note below:
Assessment / Plan
1. Septicemia: Fever down slightly and WBC decreased from 25.4 to 20.2. Continue current IV antibiotics.
2. Anemia/Coagulopathy/Thrombocytopenia: Clinically consistent with DIC. We will transfuse a unit of platelets and follow labs in 6 hours.
3. Calf swelling: Suspect superficial thromboembolism. We will consult hematology/oncology in regard to their opinion on beginning anticoagulant medicine.
4. Hyperbilirubinemia: I suspect the etiology is liver dysfunction from DIC. Follow labs in the AM. According to the information in the note, which of the following statements is NOT true?
A. The patient will continue to receive intravenous antibiotics in order to decrease the presence of disease-causing microorganisms in the blood.
B. The patient has a deficiency in the number of red blood cells, platelets (cells that help the blood to clot), and difficulty forming clots.
C. The patient's blood conditions are consistent with disseminated intravascular coagulopathy, which is also causing him to have too much bilirubin in his blood.
D. The patient's white blood count has decreased.
E. The author of the health record suspects that a clot is blocking a blood vessel in the patient's calf and has prescribed a drug that will prevent the blood from clotting.
Answer:
E. The author of the health record suspects that a clot is blocking a blood vessel in the patient's calf and has prescribed a drug that will prevent the blood from clotting.
Explanation:
Septicemia is a bacterial infection in the blood. According to the report, the patient will continue to receive IV antibiotics.Anemia is a deficiency of hemoglobin or red blood cells. Coagulopathy is the impairment of blood coagulation. This is a bleeding disorder characterized by excess, uncontrolled bleeding. Thrombocytopenia is characterized by a deficiency of platelets, leading to decreased coagulation.Thromboembolism is the blockage of blood vessels due to the dislodging of a blood clot.Hyperbilirubinemia is the excess of bilirubin in the blood due to reduced liver function.The option E states correctly that the patient has thromboembolism, leading to swelling of the calf. However, the doctor has not yet prescribed a medication. The report states that a medication will be prescribed after a hematology/oncology consultation.
How do intrusive rocks form?
Answer:
Intrusive rock, also called plutonic rock, igneous rock formed from magma forced into older rocks at depths within the Earth's crust, which then slowly solidifies below the Earth's surface, though it may later be exposed by erosion.
Explanation:
Answer:
Answer is letter D on Eng
Explanation:
Intrusive rock is formed when magma penetrates existing rock.
Are you optimistic or pessimistic about the future of our planet? why
I am pessimistic about the future.
What is planet?Weather events affect both the natural and constructed ecosystems in many nations, but their effects are disproportionately felt in underdeveloped nations and vulnerable groups.
For skill-based employees, such as farmers and factory workers, who also frequently reside in places more susceptible to weather catastrophes, changes to supply chains, agriculture, and employment have disastrous effects.
According to Professor Diego Ramrez-Lovering of Monash University, we must consider the three pillars as a component of a single system. He claims that "habitat, health, and equality" are all intricately related.
Therefore, I am pessimistic about the future.
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Views on the future of our planet are mixed, with pessimism arising from ecological challenges and optimism from technological and social progress. The determinants of our planet's future include current environmental issues, nascent technological solutions, and the proactive engagement of society.
Explanation:The question of whether one is optimistic or pessimistic about the future of our planet delves into a complex analysis of current environmental, technological, and societal trends. Pessimistic views often stem from the serious challenges we face: ecological collapse, socioeconomic disparities, and the proliferation of weapons of mass destruction. These are exacerbated by the tremendous increase in atmospheric CO₂ since the 1970s and a prevalent culture that prioritizes economic growth without ample regard for ecological realities.
However, there is also room for optimism. The rapid growth of knowledge and technological advancements, like CRISPR and alternative energy sources, could help us manage and mitigate some of these challenges. Furthermore, the activism of concerned scientist-citizens and the demands for systemic change from new generations provide a glimmer of hope that effective global collaborations may arise to address the sustainability of human life on Earth.
Finally, while economics and history show us that predicting the future is fraught with uncertainty, the point made by techno-optimists is salient: we have repeatedly transcended past limitations through innovation and adaptation. So, despite the gravity of the issues, the potential for human ingenuity and social engagement remains a critical counterpoint to a strict pessimistic outlook.
Select the best description of axon: a. stored in synaptic vesicles b. accumulates as yellow-brown granules as the cell ages c. contains a nucleus surrounded by cytoplasm receiving or input portion of a neuron d. carries nerve impulses toward another neuron, a muscle fiber, or a gland cell
Answer:
d. carries nerve impulses toward another neuron, a muscle fiber, or a gland cell
Explanation:
An axon is a fiber of the nerves that transmits nerve impulses( electrical signals) away from a cell body and towards another neuron, muscle fiber or gland cell.
We have two types of axons in the body.
a. Myelinated axons
b. Unmyelinated axons.
The difference between Myelinated axons and Unmyelinated axons is that the Myelinated axons has an external covering or insulation which is called the myelin sheath.
The myelinated axons are very numerous and mush faster than the unmyelinated axon.
The portion of the cerebrum that is associated with reasoning, planning, parts of speech, movement , emotions and problem solving is called: a) hypothalamus. b) frontal lobe. c) parietal lobe. d) cerebellum.
Answer: Frontal Lobe
Explanation: The cerebral cortex is divided into four sections, called as lobes. The frontal lobe, parietal lobe, occipital lobe and temporal lobe. Frontal lobe - associated with reasoning, planning, parts of speech, movement, emotions, and problem solving.
The frontal lobe of the cerebrum is linked with reasoning, planning, parts of speech, movement, emotions, and problem-solving. Included in the frontal lobe is the prefrontal cortex, motor cortex, and Broca's area. Other areas of the brain like the hypothalamus, parietal lobe, and cerebellum serve different functions.
Explanation:The portion of the cerebrum that is closely associated with reasoning, planning, parts of speech, movement, emotions, and problem-solving is the frontal lobe. It is located in the forward part of the brain and extends back to a fissure known as the central sulcus. The frontal lobe includes the prefrontal cortex, motor cortex, and Broca's area. The prefrontal cortex is responsible for higher-level cognitive functioning. The motor cortex is involved in planning and coordinating movement. Broca's area is essential for language production.
Studies of humans that have damaged their frontal lobes show that parts of this area are involved in personality, socialization, and assessing risk. The neurons in the frontal lobe also control cognitive functions, including maintaining attention, speech, and decision-making.
The other options given, the hypothalamus, parietal lobe, and cerebellum, are also parts of the brain but they are associated with different functions.
For instance, the parietal lobe's main functions are touch sensations and processing proprioception.
The hypothalamus is a part of the brain surrounded by the cerebrum, but it is not in the frontal lobe. It is located in the midbrain under the thalamus. It is part of the limbic system and controls the sleep cycle and body temperature.
The cerebellum is primarily responsible for muscle control, including balance and movement.
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Francis thinks that the longer a plant is in light, the more fruit it will produce. He places one group of ten plants under a UV light for six hours and another group of ten plants under the same light for eight hours. He waters the plants with the same amount of water at the same time every day; uses the same types of plants, soil, and containers; and monitors the same temperature
Answer:
Choose the correct label for each part of the experiment.
The plants that are under a UV light for eight hours
A. Experimental group
The amount of water that is given to all of the plants
D. controlled Variable
The plants that are under the light for six hours
B. Control Group
Explanation:
A river's current carries sediments into the ocean. Which sediment size will most likely be deposited in deeper water farthest from the shore? *
A) Clay
B) Pebbles
C) Sand
D) Silt
Answer:
D IS THE ANSWER
Explanation:
I got the answers to the questions right
The sediment size that will most likely be deposited in deeper water farthest from the shore is the slit. That is option D.
Sediment deposition occurs when suspended particles settle down to the bottom of a body of water.
These suspended particles include:
Clay Clay pebblesClay pebblessandClay pebblessandslits andgravels.These particles depending on their weight or mass and the speed of water flow settles or deposits faster than the other.
In high flow areas, larger, gravel-sized sediment will settle out first.
Finer particles, including silt and clay, can be carried all the way out to the ocean.
Slit is lighter in weight than clay therefore will be deposited in deeper water farthest from the shore.
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Food webs show the movement of energy through an ecosystem. The energy decreases as it moves from organism to organism. Where does the energy originally come from?
Answer:
the sun
Explanation:
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What is a possible consequence of ozone layer depletion on living organisms?
Answer:
Ozone layer depletion can cause various types of skin cancers, eye cataracts and immune deffy disorders in human beings as there is an increase in the UV-B rays that reach Earth's surface.
Answer from Gauthmath