Answer:
increase in its productivity
Explanation:
one example is a better chance for survival
like if some of the same species hate water and stay on land
and some of the same species love water and stay in water
then overall
some of the total number of the same species can survive a flood
increase in the biodiversity of an ecosystem leads to an increase in its productivity. A variety of different mechanisms in nature help create diversity in organism populations. The tundra found in the northernmost parts of the planet is the world's youngest biome.
quizlet
Which statement explains why oxygen molecules easily diffuse across a cell
membrane while DNA molecules do not?
A. Oxygen molecules are more useful to a cell than are DNA
molecules.
O B. DNA molecules contain carbon atoms, while oxygen molecules
have only oxygen atoms.
C. Oxygen molecules are very small, while DNA molecules are very
large.
D. DNA molecules have phosphate groups that the cell membrane
repels.
Answer:
C.
Oxygen molecules are very small, while DNA molecules are very large.
Does humus contain rocks? 20 points.
Answer:
Yes
Explanation:
Humus contain very small rocks, it is the upper part of the soil, it includes remains of dead plants and animals.
Hope it helps!
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When two aqueous solutions that differ in solute concentration are placed on either side of a semipermeable membrane and osmosis is allowed to take place, the water will Group of answer choices exhibit a net movement to the side with lower solute concentration. exhibit a net movement to the side with lower free water concentration. exhibit an equal movement in both directions across the membrane. exhibit a net movement to the side with higher free water concentration
Answer:
exhibit a net movement to the side with lower free water concentration
Explanation:
The correct answer would be that the water will exhibit a net movement to the side with lower free water concentration.
Osmosis is generally defined as the movement of water molecules through semi-permeable membranes from the region of higher water potential or lower solute concentration to the region of lower water potential or higher solute concentration.
From the definition, it becomes obvious that there would be a net movement of water between the two solutions to the side with higher solute concentration or lower free water concentration.
A seedling sprouts and its roots crack apart concrete, it is a type of _________ weathering. A. Organic B. Physical C. Chemical D. Biological Hurry!
Answer:
The correct answer is - D. biological.
Explanation:
Wheathering is the process of breaking of the rocks or soil. It can be of different types on the factors such as chemical wheathering, physical wheathering and biological wheathering.
When a seed fall on to on a rock surface its sprouts, push roots into cracks in the rock or concrete. As the roots of plants develop, they secrete weak acids that slowly dissolve rock around the roots.
It is a type of biological wheathering.
In a two-point test cross, 36 of the offspring were recombinant types. The remaining 64 offspring were parental types. How many map units separate the two loci
Answer:
36
Explanation:
A two-point test-cross is a cross between an individual with a double heterozygote genotype and a homo-zygous recessive individual in order to determine the recombination frequency between two linked genes. In genetics, one map unit (m.u.) can be defined as the measure of the distance (i.e., genetic distance instead of physical distance) between genes for which one (1) product of meiosis in one hundred (100) is recombinant. In this case, 36 of the offspring have the recombinant phenotype, while the remaining 64 offspring are not recombinant, and therefore both genes are separated by 36 mu (64 + 36 = 100 >> 36 mu).
The distance between two genes is usually expressed in map units. In the exposed example, 36 MU separates the two loci.
----------------------------------
The map unit is used to express the distance between a pair of genes.
To interpret it, we need to consider that for every 100 meiotic products, one of them results in a recombinant product.
The genetic distance will result from multiplying the recombination frequency by 100 and expressing it in map units (MU).
To calculate the recombination frequency we will use the next formula:
P = Recombinant number / Total of individuals.
We know that
Recombinant number = 36Parental number = 64Total number of individuals = 36 + 64 = 100 individualsSo now, all we need to do is to replace the terms by their values
P = Recombinant number / Total of individuals
P = 36 / 100
P = 0.36 ⇒ Recombination frequency
Now we need to get the distance between genes, expressed in Map Units.
P = 0.36
Distance in MU = P x 100 = 0.36 x 100 = 36 MU.
So, 36 MU separates the two loci.
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Which layer of Earth has the highest temperatures at 5000-6000 Celsius?
Answer:
Inner Core
Explanation:
The inner core is the most inner layer of the earth. The inner core contains iron, the iron in the inner core is not pure (so not just iron) scientists believe it contains sulfur and nickel and also smaller amount of other elements. The inner core is extremely hot it is somewhere between 9000 and 13000 degrees Fahrenheit (5000 and 7000 degrees Celsius).
explanation credit to: katnissdiv1 on weebly
Which statement about the cell membrane is true?
A) It contains cellulose and sugars that are involved in communication.
B) It is present in animal cells only.
C) It is rigid and elastic for supporting the cell's shape.
D) It prevents harmful substances from entering a cell.
Answer:
Its D, The cell membrane(also known a the plasma membrane) has a job in which it has to allow passage in and out of the cell. Therefore it can prevent harmful substances from entering the cell. Think of it as security, either allowing you access or denying you depending on if you're a threat
Answer:
D) it prevents harmful substances from entering a cell
Explanation:
The entire purpose of the cells membrane is to contain its organelles, the structures within it and prevent them from getting harmed by outside material.
Why dont plant cells have microvilli?
Answer: They don’t have microvili because they don’t need it.
Explanation:
Animal cells have this because it increase surface area and helps absorb food and water molecules.
Plant cells do not have microvilli because they do not require the same type of surface area enlargement as animal cells.
Microvilli are small, finger-like projections that extend from the surface of animal cells. They help to increase the surface area of the cell, which is important for functions such as absorption and secretion.
Whereas plant cells have a rigid cell wall that provides structural support and protection. They have evolved unique structures to meet their specific needs, such as chloroplasts for photosynthesis and a cell wall for support and protection.
So, the absence of microvilli in plant cells is not a disadvantage since they do not require the same surface area enlargement as animal cells.
Therefore, the absence of microvilli in plant cells is due to their unique structural and functional needs.
Learn more about microvilli here:
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on which surfaces did you move the box?
Answer:
The force of friction between the two surfaces will increase if the two surfaces are pressed harder against each other. Heavy box will press the floor surface harder as compared to the lighter box. That means the force of friction will be more between the heavier box and surface than between the lighter box and surface. Thus, larger force will be needed to push the heavier box than to push the lighter one.
What factors differentiate Earth's atmospheric layers?
A. Pressure and Rate of condensation
B. Radiation deflection and Rate of condensation
C. Temperature and Pressure
D. Temperature and Radiation deflection
Plz help
Answer:
What factors differentiate Earth's atmospheric layers?
A. Pressure and Rate of condensation
B. Radiation deflection and Rate of condensation
C. Temperature and Pressure
D. Temperature and Radiation deflectionWhich statement best describes how a tree and a mouse get the glucose they need as a source of energy?
O Both a tree and a mouse get glucose indirectly from other living things
A tree makes glucose using the sun's energy, and a mouse gets glucose by eating other living things
Both a tree and a mouse use the sun's energy directly to produce glucose.
Both a tree and a mouse convert ATP into glucose.
Answer:
The correct answer is
A tree makes glucose using the sun's energy, and a mouse gets glucose by eating other living things.
Explanation:
A tree uses photosynthesis to create energy in the form of glucose. On the other hand, a mouse cannot use the sun's energy to produce glucose through photosynthesis. Therefore the mouse must obtain the glucose by consuming other organisms, such as plants and insects.
hope it helped :)
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What is produced/made when our food is burned?
___+___+___
Answer:
it should be ( carbon dioxide, oxygen, and energy
Explanation:
Explanation:
Oxygen /carbon dioxide and energy
This is the process happens continuously inside our body .This is called respirationDestructive interference can cause two waves to average each other out, resulting in flat water.
True
False
Answer:
True is the answer for your question. Mark me as the brainiest first please.
Explanation:
Answer:
True
Explanation:
I just took the test on marinebio edge2020
Gene flow is one way that the gene pool of a population can change. In which
of these situations would gene flow occur?
A. Individuals move from one population into another.
B. Mutations in the buds on a tree cause some of its leaves to curl.
o
C. A dog breeder uses artificial selection to get healthier puppies.
D. A disturbance causes a random change in allele frequencies.
Answer:
A because one of the key terms is the transfer of alleles from one population to another
Why is it that although Nocardia spp. grow well on most common nonselective laboratory media, many are missed when the cultures are read
Answer:
These organisms require 3 to 6 days to grow.
Explanation:
Nocardia are a group of actinomycetes. Some of the species of the nocardia are pathogenic to the humans. There are more than 70 species of nocardia in the world.
Some of the Nocardia spp. grow on the most common non laboratory media but many of them are missed out when the cultures are read because these organisms requires at least 3 days to 6 days to grow.
Leaf is modified into thorn where water availability is low.....give reason?
Answer:
To help conserve water or prevent loss via transpiration from the leaves
Explanation:
Some plants are found growing in habitats with little or no moisture content as annual rainfall is very low. These plants are called xerophytic plants. However, despite the low water condition, these plants are adapted to the environment and still survive.
One of their adaptation (structural) is that their leaves are reduced to thorns. Ideally, plants tend to lose water via the stomata on the leaves in a process called TRANSPIRATION. Hence, the leaves of plants adapted to a xerophytic habitat is modified to thorns in order to prevent water loss from the leaves and conserve the water.
Determine which of the following statements is true about energy in ecosystems A. Consumers pass on 20% of the energy they get from a lower trophic level. OB. Primary consumers lose 60% of the energy they absorb from producers as urine and feces. C. 10% of the energy Primary consumers absorb is lost as heat. Ons Primary producers lose 20% of the energy they absorb as urine and feces.
Answer: C. 10% of the energy Primary consumers absorb is lost as heat.
Explanation:
According to the ten percent law of energy flow only 10 percent energy is transferred from one trophic level to the next trophic level and rest of the energy is used to develop the biomass and lost as heat. As the loss of heat is an essential exothermic reaction after the digestion and assimilation of food the energy is lost as heat from the body of the primary consumers is 10%. Primary consumers are animals that are dependent on plants for their food requirements for example deer, goat and others.
In adults, red bone marrow is located in ______. Multiple select question. the sternum the ribs vertebrae skull bones the diaphysis of the humerus
Answer:
The sternum
The ribs
Vertebrae
skull bones
the humerus
You are examining the data from two time points taken in an experiment. At time 1 there was an extracellular concentration of Na of 115 mM outside the cell and 8mM inside the cell. An amino acid, lycine, is at 20mM outside and 40mM inside. At the second time measured Na is 100mM outside the cell and 23 mM inside the cell. Lycine is 15 mM outside the cell and 45mM inside. What is the best explanation
Answer:
See the answer below
Explanation:
The best explanation would be that both Na and the amino acid lycine are simultaneously diffusing (in bound form) from the outside to the inside of the cell.
Considering the Na alone, one would see that the concentration outside the cell decreased in equal amount (15 mM) as the increase in the intracellular concentration of the same molecule.
Also considering the amino acid alone, the extracellular concentration increased by the same magnitude (5 mM) as the decrease in the intracellular concentration of the same molecule.
Hence, it could only be that both molecules bind together and diffused from the region of higher concentration (outside of the cell) to the region of lower concentration (inside).
What are the positive effects human activities on vegetation?
Answer:
Vegetation cover is also significantly impacted by human activities. Changes in land use resulting from human activities such as urbanization and agriculture are important factors influencing the spatial pattern of vegetation.
Answer:
Vegetation plays a vital role in our natural ecosystem and also supports the biosphere in various ways; vegetation helps to regulate the flow of numerous biogeochemical cycles, most importantly those of water, carbon, and nitrogen; it also contributes in the local and global energy balances. With the continuous increase in the population, the negative impact of human activities on the ecological environment is also increasing, such as overgrazing caused by the rapid increase of livestock.
What causes global circulation?
1. the Earth's core cools down some areas more than others
2. parts of the world heat up differently
3. the water in the oceans acts as an insulator
4. the sun stops emitting radiation at night
Answer:
parts of the world heat up differently
Explanation:
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An experiment was conducted to determine whether a deficiency of carbon dioxide in the soil affects the phenotype of peas. Listed below are the phenotype codes where 1=smooth-yellow, 2=smooth-green, 3=wrinkled-yellow, and 4=wrinkled-green. Do the results make sense?
Answer:
No
Explanation:
The results of the phenotype do not make any sense in relation to the main aim of the experiment.
Smooth, wrinkled, yellow, green describe attributes relating to seed texture and flower colours in a result that simulates that of a plant breeding experiment, rather than a plant physiology experiment.
The determination of the effects of carbon dioxide deficiency in the soil on the phenotypes of peas is a physiological experiment. Hence, a result in the form of a plant breeding experiment would make not be relevant.
If we poke a plant and an animal cell ,which one of them would lose its shape?
Answer:
animal cell
Explanation:
hope this will help you
The cells in this part of a plant form long, vertical tubes. What is the most
likely relationship between the structure and function of these specialized
cells?
O A. The tubes allow water and nutrients to be transported throughout
the plant.
O B. The tubes prevent potential damage to the leaves caused
used by
strong winds.
C. The tubes allow the plant to absorb sunlight for photosynthesis.
O D. The tubes prevent water loss from the leaves.
Answer:
xylem and pholem.....?
Select the correct answer.
What conclusion can you make about the skeletal structure of these two organisms?
A.
They share a common ancestor, but they’re different species.
B.
They’re the same species.
C.
They’re different species with no evolutionary relationship.
D.
The four-legged organism directly evolved from the two-legged organism.
Answer:
A. They share a common ancestor, but they’re different species.
Explanation:
why is it a good idea for a bacterial cell to be abel to use glucose first as an energy source then switch to lactose
Answer:
Due to less steps and requires less energy.
Explanation:
The bacterial cell is able to use glucose first as an energy source then switch to lactose because glucose requires less steps and less amount of energy for the break down as compared to lactose. If lactose is the only sugar available to the bacterial cells, then bacterial cells will use it as energy source for the production of energy. In order to use lactose, the bacteria must express the lac operon genes, which encode the main enzymes for lactose uptake and metabolism.
Why are groups of small cells better than one large cell at moving material in
and out?
A. They have a smaller volume.
B. They have more cell structures,
C. They have a greater surface-to-volume ratio.
O
D. They have a lower surface-to-volume ratio.
Answer:
C. They have a greater surface-to-volume ratio.
Explanation:
Because these smaller cells can access and pass through the membranes of the other cell membranes and permeable coverings easily and voluntarily unlike larger cells. It is also efficient for these smaller cells to penetrate and travel, delivering and transporting goods and materials such as nutrients, oxygen and waste throughout the body without consuming enough energy and conserving lesser space.
For simple reasons, they are faster, more efficient and consumes little space, and most especially depletes lesser energy. So, many small cells have more surface area than one large cell.
Which greenhouse gas has an average lifetime in the atmosphere of a few weeks to thousands of years and is the largest contributor to climate change?
Answer:
Greenhouse gases from human activities are the most significant driver of observed climate change since the mid-20th century.1 The indicators in this chapter characterize emissions of the major greenhouse gases resulting from human activities, the concentrations of these gases in the atmosphere, and how emissions and concentrations have changed over time. When comparing emissions of different gases, these indicators use a concept called “global warming potential” to convert amounts of other gases into carbon dioxide equivalents.
Explanation:
Why does it matter?
As greenhouse gas emissions from human activities increase, they build up in the atmosphere and warm the climate, leading to many other changes around the world—in the atmosphere, on land, and in the oceans. The indicators in other chapters of this report illustrate many of these changes, which have both positive and negative effects on people, society, and the environment—including plants and animals. Because many of the major greenhouse gases stay in the atmosphere for tens to hundreds of years after being released, their warming effects on the climate persist over a long time and can therefore affect both present and future generations.
Answer: carbon dioxide
Explanation:
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what attribute of skeptic would contribute to a good scientific mind
Which of the following is NOT a way igneous rocks are classified?
Question 2 options:
By their texture (example: glassy, rough, porous)
By their composition
By the amount of silica
By their color
Answer:
By the amount of silica
cause igneous rock is classified by their color, texture and chemical composition
