For stars in their main sequence, as stellar mass increases, so do diameter, temperature and luminosity.
What is the relationship between stellar temperature, radius, and luminosity?The brightness (luminosity) is represented on the y axis in the H-R diagram below, while temperature is indicated on the x axis (from right to left). The population of stars displayed diagonally from top left to bottom right is the main sequence.
The brightness of any incandescent (heat-glowing) object obviously rises with temperature, and the hotter the object, the bluer its light.
A faster rate of fusion in the core, caused by more pressure from greater mass, is what causes a star to get hotter.
So, the larger the star (mass and diameter), the brighter, hotter, and bluer it is. Smaller stars are redder and colder.
Red giants and white dwarfs do not appear in the main sequence.
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Which of these organelles are present in plant cells but not animal cells? Write all that apply.
chloroplast
cell wall
large, central vacuole
mitochondria
What is desertification?
Question 4 options:
Formation of a desert.
Process of fertile land becoming unproductive in nearly dry areas.
Mass movement of sand dunes.
Areas of heavy rain, covered with sand.
Process of fertile land becoming unproductive in nearly dry areas.
Explanation:Desertification occurs when fertile land becomes arid.
What is Desertification
As the answer choice says, desertification is when fertile land becomes unproductive. The land that was once fertile then becomes a desert as vegetation can no longer grow. This means that the ground becomes very dry and almost sand-like, hence the name desertification.
Desertification is considered a form of soil degradation. This means that desertification happens when the soil becomes too dry or loses too many nutrients. There are multiple causes for this.
Causes of Desertification
A leading cause of desertification is drought. If land does not get enough rain, then it will dry out and become arid. Carbon emissions and global warming have decreased global rainfall and thus increased the rate of desertification across the world.
Overfarming is also a big cause of desertification. Fertile soil has limited nutrients, which are used by plants that grow in the soil. Usually, the soil has enough time to replenish the nutrients before more plants are grown. However, due to overfarming in some areas, the soil's nutrients are used faster than they can replenish. This causes the soil to lose its fertility and leads to desertification.
3. Which bacteria can be helpful? Select all that apply.
A. Rhizobium
B. Escherichia coli
C. Streptococcal pyogenes
D. Lactobacillus acidophilus
Answer:
D and A are safeExplanation:
Both bacterias are helpful to plants and humans.
Most of the food produced in
industrial agriculture is
A. eaten by the farmers
B. eaten by the workers
C. sold for a profit
D. unable to be eaten
Answer: c
Explanation:
capitalism
Deductive or Inductive reasoning: Insects generally survive mild winters better than
harsh ones. Therefore, insect pests will become more problematic if global
temperatures increase.
Both
Deductive
Inductive
Neither
The reasoning insects generally survive mild winters better than harsh ones and therefore insect pests will become more problematic if global temperatures increase' is an example of deductive reasoning.
What is deductive reasoning?The expression deductive reasoning makes reference to a thinking process in which the outcomes of a given observation can be used to deduce or predict new outcomes in the process of scientific reasoning.
Therefore, we can conclude that deductive reasoning can be used to understand different observations of the real world such as in this case the behavior of pests in a climate change context.
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Question 9
Which is a model of feeding relationships?
OA) protein building
OB) food map
OC) food web
OD) sugar molecules
Answer:
protein building
Explanation:
Because it helps the body alot for healthy growth
what is the role of the nervous system in digestion?(1 point) responses to provide oxygen to provide oxygen to provide enzymes to provide enzymes to provide electrical signals to initiate peristalsis to provide electrical signals to initiate peristalsis to provide passage of nutrients throughout the body to provide passage of nutrients throughout the body
The role of the nervous system in digestion is to provide electrical signals to initiate peristalsis.
What is peristalsis?Peristalsis is a radially symmetrical contraction and relaxation of muscles that travels anterogradely, like a wave down a tube. Peristalsis is a coordinated progression of involuntary circular muscles that contract and relax at the same time in the gut lining. Peristalsis is preceded by a simultaneous contraction of the longitudinal muscle and relaxation of the circular muscle.
Most of the smooth muscle tissue in a digestive tract, like the human gastrointestinal tract, contracts sequentially to create a peristaltic wave, which propels a ball of food (called a bolus before being converted into chyme in the stomach) along the tract. The chewed material is moved by relaxing the circular smooth muscles, contracting them behind it to prevent it from moving backward, and then pushing it forward with the longitudinal smooth muscles.
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How is it possible for large animals to survive in the prairie?
The prairie provides unlimited amount of food source for larger animals.
The prairie provides unlimited amount of water for large animals to use.
O Large herbivores need a lot of sunlight found in the prairie to grow.
The prairie provides enough space and food for herbivores to grow.
Answer:
Its possible for large animals to survive in the praire because they eat other animals( smaller animals that wont harm them ) to survive.
Explanation:
2. Define the following terms and give two examples of each.
Monosaccharide-
Disaccharide-
Polysaccharide
The following terms and give two examples of each:
Monosaccharide- Glucose, and fructose.
Disaccharide- Sucrose, lactose.
Polysaccharide- Starch and hyaluronic acid.
Monosaccharides are carbohydrates made up of one sugar unit. Common examples of monosaccharides or monosaccharides are glucose and fructose. These two monosaccharides are called hexoses because they have six carbon atoms. The three main monosaccharides we consume are fructose galactose and glucose.
A disaccharide is a sugar formed when two monosaccharide monosaccharides are joined by a glycosidic bond. Like monosaccharides, disaccharides are water-soluble. Three common examples are sucrose lactose and maltose. Disaccharides are important sources of energy in the diet and are usually considered the three main compounds sucrose lactose, and maltose.
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Kate and Sam are using a scanning electron microscope to study photosynthesis in algae. Which is the benefit of this type of microscope compared to a light microscope?
Scanning electron microscope is better than light microscope to study photosynthesis in algae.
The light microscope is an instrument for visualizing great detail of an object. It does this by way of developing a magnified image via the use of a sequence of glass lenses, which first attention a beam of light onto or via an object, and convex lenses to increase the picture fashioned.
Light microscopy is used to make small structures and samples seen by way of supplying a magnified photo of the way they interact with visible light, e.g., their absorption, reflection and scattering.
Lenses form the picture goal lens gathers light from the specimen eyepiece transmits and magnifies the photo from the goal lens for your eye nosepiece rotating mount that holds many objective lenses tube holds the eyepiece on the proper distance from the goal lens and blocks out stray light.
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Which word correctly fills in the blanks below?
Single-celled and many multi-celled organisms reproduce asexually by a process called _____________, which is simple cell division. In ___________, DNA is duplicated and then divided equally between two daughter cells. In ___________ in eukaryotes, the DNA is sorted into the two new nuclei formed. A separate process divides the cytoplasm in two. __________ keeps the number of chromosomes constant from one cell generation to the next.
Group of answer choices
mitosis
photosynthesis
budding
cellular respiration
Answer:
mitosis
Explanation:
Answer: a. budding
b. mitosis
c. budding
d. mitosis
Explanation:
Describe the main process involved in Water Cycle
Due to differences in mating times, two sub-populations of frogs form into separate species, even though they occupy the same pond. This overall process is known as ________.
Due to differences in mating times, two sub-populations of frogs form into separate species, even though they occupy the same pond. This overall process is known as sympatric speciation.
What is sympatric speciation?Sympatric speciation refers to the divergence of individuals in a species to produce two or more different species in the same geographic location. Generally, sympatric speciation is due to the emergence of reproductive barriers between individuals in the same population.
Therefore, we can conclude that sympatric speciation may lead to the use of the same habitat by two different but evolutionary-related species.
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Need help answer all 5 questions asap I need to turn it in some please help giving 30 points
Answer:
Q.1: In this image water is abiotic while the animal shown here is a biotic factor
Q.2: An organism can compete for both biotic and abiotic factors which includes
Abiotic factors: Water, Light, Air, Space, etc
Biotic factors: Animals, Plants, etc
How the organism competes for resources:
Animals usually compete for resources when their needs overlap and the resources become short in an ecosystem. Animals can use different strategies to compete with other animals like Predation, symbiosis, fights, etc
Q.3: Although plants can`t move like animals, they are living as well as the biotic factor of an ecosystem. So, plants also compete for resources including water, root space, light, and minerals
Q.4: As the arctic animals usually adapted for winter. If the temperature is rising over the hundred years, these animals may be able to survive in that harsh environment by bringing many changes in their body they would be able to reduce the fur and thick skin to the thinnest and would be able to release more body heat. They would bring all these changes through evolution. On the other hand, if the changes do not happen they would all die
Q.5: The main difference between the food chain and the food web is that
Food chain:
A food chain is a simple linear sequence that explains the food strategies of a few animals in an ecosystem. It simply explains who eats whom.
Food web:
It is the combination of all food chains in an ecosystem
Your food chain and food web are not properly visible.
Make sure to post clearly
Explanation:
Usage of synthetic hormones for the modification of plants growth have bay environmental implications
The hormones respond to increased sunlight competition by stimulating increased stem elongation. Increased competition may cause plants to devote more energy to growing stem elongation than expanding leaf area.
Fluctuations in nutrient availability drought heat or cold high salinity or pathogen pest attack. Plant growth regulators are substances that, when added in small amounts, alter plant growth, usually by stimulating or inhibiting some part of the natural growth regulation system.
Plant hormones are regulators of nearly all aspects of plant development and the plant's response to its environment. Many plant hormones are active at very low concentrations and have strict spatial regulation of synthesis and response. They play important roles in the interactions between plants and beneficial microorganisms.
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Suppose a double-stranded molecule similar to dna replicates itself, such that one molecule contains two old strands and the other molecule contains two new strands. Such replication would be an instance of _______ replication.
Such replication would be an instance of Conservative replication.
What is DNA replication?A double-stranded DNA molecule is copied in the DNA replication process to create two identical DNA molecules.
The need for replication arises from the fact that every time a cell splits, the two daughter cells must share the same genetic material, or DNA, as the parent cell.
A difficult process in which the DNA double helix's "parent" strands are split apart and then each is replicated to create a new (daughter) strand.
Because one strand from each parent is conserved and remains intact after replication, this mechanism is referred to as "semiconservative."
Therefore, such replication would be an instance of Conservative replication.
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How many strong hurricanes were there a few decades ago
how does diffusion help a cell maintain homeostasis? responses:
A. it helps the cell expel excess waste.
B. it lets the cell know when it needs to produce more energy.
C. it helps the cell obtain and break down food for energy.
D. it helps maintain an equilibrium of particles inside and outside a cell.
Answer:
Explanation: Took the test
Diffusion is the movement of molecules through a semipermeable barrier from a higher concentration to a lower concentration. Therefore, option (D) is correct.
What is homeostasis?The term "homeostasis," which derives from the Greek words for "same" and "steady," refers to any method that living things employ to actively preserve the relatively stable conditions required for survival. Walter Cannon, a doctor, first used the term in 1930.
Fluids and electrolytes, energy and nutrition, and immune response mediators are three factors that affect homeostasis. For example, t Cell injury causes changes in the sodium-potassium pump, which disrupts fluid and electrolyte homeostasis, and surgery causes changes in functional extracellular fluid.
Hence, diffusion can help maintain the homeostasis in body.
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What would happen to a plant cell if its cell wall stopped working properly?( Khan academy)
Choose 1 answer:
Choose 1 answer:
(Choice A)
A
The cell would lose its rigid shape.
(Choice B)
B
The chloroplasts would take over the cell wall’s function.
(Choice C)
C
The cell would not be able to make sugar via photosynthesis.
Answer:
A
The cell would lose its rigid shape
Answer:
Option A ) A Cell Would Lose Its Rigid Shape
Explanation:
Cell wall is thick and rigid structure surrounded the cell membrane of plants, bacteria and fungi.
Cell wall is an essential part of a plant cell. Cell wall serves many important functions. One of this important function is withstanding the internal turgor pressure.
Water tends to enter the cell from outside environment because of concentration gradient. Most of the plant cell volume is covered by a large single membrane (called tonoplast) bounded organelle called vacuole. Water from outside moves into this vacoule and hence plant get a descent turgidity and support.
As water enter into the vacoule it exert a pressure on its wall as a reault the vacoule inturn exert a pressure on the cytoplasm and organelles. The cytoplasm stretches toward the periphery and hence a pressure is exerted on the cell membrane. This pressure is known as turgor pressure. Here cell wall come into play and help the cell to withstand this turgor pressure.
) protein kinases are enzymes that catalyze phosphorylation of target proteins at specific sites, whereas protein phosphatases catalyze removal of phosphate(s) from phosphorylated proteins. phosphorylation and dephosphorylation can function as an on-off switch for a protein's activity, most likely through
Phosphorylation and phosphorylation can function as an on-off switch for a protein's activity, most likely through the change in a protein's charge leading to a conformational change.
A molecular switch is created by the activities of phosphorylation and dephosphorylation. In contrast, when proto-oncogene tyrosine-protein kinase (c-Src) is dephosphorylated, it is turned off, preventing the regulation of cell growth. For example, protein kinase B is only activated by following wing phosphorylation of its Ser and Thr residues.
One of the first processes necessary for the coordination of cellular and organic functions, including the control of metabolism, proliferation, apoptosis, subcellular trafficking, inflammation, and other significant physiological processes, is protein phosphorylation.
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Complete question is: Protein kinases are enzymes that catalyze phosphorylation of target proteins at specific sites, whereas protein phosphatases catalyze removal of phosphate(s) from phosphorylated proteins. Phosphorylation and dephosphorylation can function as an on-off switch for a protein's activity, most likely through
Protein kinases are enzymes that catalyze phosphorylation of target proteins at specific sites, whereas protein phosphatases catalyze removal of phosphate(s) from phosphorylated proteins. Phosphorylation and dephosphorylation can function as an on-off switch for a protein's activity, most likely through?
Polymerization and the break down of a polymer are two opposite reactions. What role does a water molecule play in both of them?
Answer:
The correct answer is option (a). A water molecule is released during polymerization, which helps in the formation of a bond, and it is added during the break down of a polymer, which helps in breaking the bond.
Explanation:
Which two organelles are most responsible for producing insulin in the pancreas?
Answer:The Endoplasmic Reticulum or the ER, and Ribosomes.
Explanation:
As the human population increases, stressors are being placed on the environment. Which of the following is one consequence of this growth?
increases in availability of freshwater
increases in renewable energy technology
decreases in conservation effort initiatives
decreases in availability of natural resources
As the human population increases, stressors are being placed on the environment. Decreases in availability of natural resources is one consequence of this growth.
Population- A population is the total number all organisms belonging to the identical species that really are present in a given location at the same time and have the potential to interbreed. Individuals need to be able which can mate with other members of a population and give birth to viable children for interbreeding to take place.
Natural Resources- Without human assistance, natural resources are present on planet. We can get water, wood, food, and energy from natural resources. Without natural resources, life is not conceivable. Oil, coal, natural gas, metals, stone, and sand are examples of natural resources.
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4) The human body stores fats as
Adipose (fat) cells are specialized for the storage of energy in the form of triglycerides, but research in the last few decades has shown that fat cells also play a critical role in sensing and responding to changes in systemic energy balance.
If someone received two discounts on a $50 pair of shoes the discounts were taken off one after the other if she paid 30 for the shoes what was the percent discount for each coupon
The percentage discount for each coupon was 40%.
Percentage discount: A discount that is applied to a product or service in the form of a percentage is known as a percentage discount.
Given:
Original price of the shoes = $50
Amount she paid for the shoes= $30
Discount= $50 - $30 = $20
Discount percentage= [tex]\frac{discount}{marked price} *100[/tex]
=20/50 × 100
= 40%
Hence, the percentage discount for each coupon for a person who received two discounts on a pair of shoes that cost $50, and each discount was removed one at a time, and she paid $30 for the shoes, was 40%.
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Which of the following describes the BEST method for keeping the endocrine system healthy?
A.
exercise regularly
B.
eat a healthy and balance diet
C.
manage stress
D.
all of the above
Please select the best answer from the choices provided.
A
B
C
D
Answer:
the answer is D
Explanation:
Took the quiz
blackburn's lab altered the sequence of the telomerase rna. predict what might happen to telomeres in tetrahymena cells if the tetrahymena template rna were mutated to 3'-accccgac-5'.
The telomeres sequence would altered to 5-GGGCTG-3 if the tetrahymena template rna were mutated to 3'-accccgac-5'.
The biological underpinning for limitless proliferative capacity is nearly always provided by telomerase, an RNA-dependent DNA polymerase that creates telomeric DNA sequences. The chromosomal termini of vertebrates are extended with lengthy, repeating lengths of the straightforward telomeric DNA sequence [TTAGGG]n by the specialized DNA polymerase known as telomerase. DNA replication is hampered by the ends. Because one of the two new DNA strands at a replication fork is continuously made and is referred to as the leading strand, the DNA at the very end of the chromosome cannot be fully copied in each round of replication. This results in a slow, gradual shortening of the chromosome. Each Okazaki fragment starts with its own RNA primer, and the other strand is created in a large number of little pieces. The second strand, also known as the lagging strand, is formed in several tiny fragments known as Okazaki fragments, each of which starts with a unique RNA primer.
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what is the genotype if the male animal
What systems or system is responsible for the tingling in our foot?
Examine the data for August 13 at midnight (roughly 00:00:00). What happens to the
water temperature as you go deeper into the lake?
The water at the bottom of deep lakes can grow cold without turning to ice due to the pressure. The water deep within the lake is pressured downward by the gravitational weight of all the water that is located higher above.
How does the temperature change as you go further into the lake?
The water at the bottom of deep lakes can grow cold without turning to ice due to the pressure. The water deep within the lake is pressured downward by the gravitational weight of all the water that is located higher above.The pressure permits the water near the lake's bottom to get chilly without rising and expanding.Warm water is less dense than cold water.Since salty, cold ocean water descends to the bottom of ocean basins beneath the less dense, warmer water above the surface, the temperature of the water decreases with depthThe deeper you go, the warmer the lake becomes.The upper layers of the lake warm up more in the summer than the lower ones.When swimming in a lake in the summer, you've surely observed that while your feet are frigid, your shoulders feel like they're in a warm bath.Warm water floats on top of the lake's surface because it is less dense than colder water. Ocean depth leads to a reduction in temperature.At the deeper depths, there are no seasonal variations.At the sea's surface, the temperature ranges from 30 °C (86 °F) to 1 °C (30.2 °F) at the seabed. As you are probably aware, water can heat up or cool down more slowly than air.Ice starts to develop when water cools to zero degrees Celsius (0°C), and it floats on top of warmer water, which is normally four degrees Celsius near the bottom of a lake or river (if it is not frozen). The pressure of the water pressing down on you increases as you go more beneath the surface of the ocean.The pressure rises by one atmosphere for every 33 feet (10.06 meters) you descend. The lower water quickly combines with the heat that the ocean absorbs.The heat is dispersed by the mixing.The water at the surface is kept warmer at night because it is combined with the warmer water underneath while the land rapidly cools. The rate at which the Earth's temperature rises with depth is known as the geothermal gradient.It suggests that the Earth's surface is receiving heat from the planet's warm center.For every kilometer of depth, the temperature rises by about 25°C on average.
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