Simplify using exponent rule with same base an . am=an+m:a3 - 3 b3 + 1Calculate the sum or differen.
Robins are a species of songbird which typically lays four eggs
in a single clutch. Larger clutches can lead to malnourished
chicks. Smaller clutches make it less likely that there will be a
viable offspring. In terms of natural selection, this is an example
of:
If larger clutches can lead to malnourished chicks and smaller clutches make it less likely that there will be available offspring, then this is an example of stabilizing selection in terms of natural selection.
What is stabilizing selection?Stabilizing selection is a special class of natural selection that tends to favor average phenotypes in order to maximize the differential reproduction and survival rate and thus increase the adaptive fitness of a population to a given environment.
Therefore, with this data, we can see that stabilizing selection can increase adaptive fitness and it represent a strategy in term of natural selection.
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which muscle is highlighted below
Answer:
give the picture bro.....
When a tadpole changes into a Frog what Characteristic of life is that?
Answer:
Metamporhisis!
help please i neec all these questions answered
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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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:
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.
Passive transport into cells is driven by a concentration gradient; a greater concentration of molecules on one side of the membrane.
Which direction would oxygen move across a cell membrane if there was a greater concentration of oxygen molecules on the inside of the membrane?
Answer:
oxygen molecules move towards the outside
Explanation:
why is it difficult to study these four systems individually?
It is difficult to study the atmosphere, biosphere, hydrosphere, lithosphere and biosphere differently because they are all intricately interconnected.
What is the earth?The earth is composed of different systems. Let us note that there is always a cycling of matter in the earth. This is as a result of the movement of particles such as water and the exchange of gases. There are four distinct spheres that make up the earth and they are;
Atmosphere: This is the thin layer of gases that lie above the earth. This is the layer that holds all the gases that we can see, the exchange of gases do occur in the atmosphere.
Biosphere: This is the aspect that comprises all the living things that could be found on the earth. They are important in the flow of energy in nature via feeding relation ships.
Hydrosphere: This has to do with the water that is used by living things. Water is found in the non living environment but is very important to the survival of the biosphere.
Lithosphere: This is the solid part of the earth. It is the outermost crust on which plants grow.
It is difficult to study all these systems individually because they are quite interconnected.
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Missing parts;
in creating a model of our living planet, scientists need to consider four major earth systems. briefly describe these four systems, and then explain why it is difficult to study these systems individually.
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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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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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:
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:
Which of these organelles are present in plant cells but not animal cells? Write all that apply.
chloroplast
cell wall
large, central vacuole
mitochondria
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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Describe the main process involved in Water Cycle
Wild tomatoes are small and green. What is one way new traits that affect size and color can occur? (5 points)
Cloning
Mutation
Irrigation practices
Asexual reproduction
One way new traits that affect size and color can occur by Mutation.
A mutation is a change in the DNA sequence of an organism. A genetic mutation is a altering to a gene's DNA sequence to get something different. It creates a permanent change to that gene's DNA sequence.
The ultimate source of all genetic variation is mutation. Mutation is important as the first step of evolution because it creates a new DNA sequence for a particular gene, creating a new allele. Mutation is important for changing the traits that can help to affect size and color. Any change in the DNA sequence of a cell. Mutations may be caused by mistakes during cell division, or they may be caused by exposure to DNA-damaging agents in the environment.
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Which is a possible result of higher air temperatures caused by climate change?
A) decrease in strength of hurricanes
B) freezing of polar ice caps
C) rapid evaporation of water in the soil
D) increase in human population numbers
Answer:
D
Explanation:
more people=more use of cars which plays a big part in climate change
Calculate the relative formula
mass of HNO3
63 units.
Relative formulae mass is the average mass of one molecule of an element to 1/12 of mass of a carbon 12 atom.
HNO3 is the formula for Nitric Acid. It comprises of one atom of H, one of n, 3 atoms of oxygen.
molar mass of one H hydrogen atom = 1
molar mass of one N nitrogen atom =14
molar mass of one O oxygen atom =16
molar mass of one molecule of HNO3 = 1+ 14+ 3(16) = 63
Hence the formulae mass of HNO3 is 63 units.
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molecular mass of HNO3
= mass of H atom + mass of nitrogen atom + 3 x mass of oxygen atom
=1+14+48=63u
What is known as HNO3?
Nitric acid (HNO3) is an industrial chemical used to make fertilisers and explosives. It is a colourless, fuming, and extremely corrosive liquid with freezing and boiling points of 42 and 83 degrees Celsius, respectively.
Image representing what "hno3" means
The uses of HNO3 are powerful oxidising agent is HNO3. It can be produced by ammonia being catalytically oxidised. It is a typical laboratory reagent and a crucial chemical in the production of fertilisers and explosives. Nitric acid has a PH of roughly 3.01.
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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:
what is the genotype if the male animal
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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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.
Help please will give brainliest to whoever answers this.
Answer:
(1) 0 N. (2) 4 N down. (3) 5 N left. (4) 4 N right. (5) 0 N.
ExplanationExplanationExplanation:
where is resin infiltration most successfully used? group of answer choices in pits and fissures in early cavitation on interproximal surfaces on smooth surface white spots
Answer:
D) On smooth surface white spots
Explanation:
your welcome!
Calculate the distance the Aleutian Island chain is from the convergent plate boundary.
Group of answer choices
10 km, 0. 006 km, 166. 67 km, or 100 km
The Aleutian Island chain is 3000km from the convergent plate boundary.
Along a convergent plate boundary that extends along Alaska's southern coast and the Aleutian Islands, there is an oceanic trench known as the Aleutian Trench. From a triple junction with the Ulakhan Fault and the northern end of the Kuril-Kamchatka Trench in the west to a junction with the northern end of the Queen Charlotte Fault system in the east, the trench stretches over 3,400 kilometers (2,100 mi).
The trench is a portion of the line separating two tectonic plates. Here, the North American Plate is being subducted beneath the Pacific Plate at an angle of over 45 degrees.
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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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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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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 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.