I need help please. (30 points
Which of these is a basic need of all organisms?
a) Soil.
b) Sunlight.
c) Oxygen.
d) Food.
Wetlands support a large number of animal species. Chemical weed killers are dumped into this wetland and the aquatic plants are killed. We should expect ___________________ to be affected by the death of the plants.\
Answer: all the animals in and around the wetlands
The correct answer for the blank is animals.
The producers are always the green plants and in case of wetlands the primary producers are the aquatic plants.
The aquatic plants present in the wetland are the producers of the ecosystem present in wetland.
If we will remove the producers from the ecosystem then, all the consumers(animals) will die.
When the DNA begin to coil and condense, the cell is in _____
The right answer is G2 phase, in order to prepare itself for the M phase.
Phase G2 is a short phase (3 to 4 hours) that starts as soon as replication is enabled; the cell is diploid.
SMC (Structural Maintenance of Chromosomes) Proteins: Condense chromatin = a kind of motor that causes the coil of chromatin.
Histones H1 (internucleosomal histones) are also involved in this condensation.
what causes an unsaturated fatty acid to have a different shape than a saturated fatty acid
Answer:
Explanation:
Unsaturated fatty acids can be monounsaturated or polyunsaturated, monounsaturated fatty acids have one double carbon bond and polyunsaturated fatty acids have more than one double carbon bond. Saturated fatty acids have one single bond. The less carbon bonds, the more carbons the chain has, therefore the more saturated the fatty acid is.
Dave pulled out 4 dif CD's to find out which type of music helped him finish his hw the fastest. He used a stopwatch for 5 minutes for each type.
What are some constant (controlled) variables in this experiment?
Which organic molecule is part of an enzyme
An enzyme includes an organic molecule known as a coenzyme, which enhances the enzyme's function. Coenzymes are organic helper molecules that are typically derived from vitamins. Coenzymes and cofactors, such as metal ions, are essential for the optimal activity of enzymes.
Explanation:The organic molecule that is part of an enzyme is known as a coenzyme. Coenzymes are organic helper molecules made up of carbon and hydrogen, and they play a critical role in the function and regulation of enzymes. They are often derived from dietary vitamins and participate in reactions without being changed themselves, essentially serving to increase enzyme efficacy, selectivity, and specificity. Enzymes may also require inorganic ions known as cofactors to function optimally. These inorganic ions, such as iron (Fe++) and magnesium (Mg++), help stabilize enzyme conformation. An example is the enzyme DNA polymerase, which requires a bound zinc ion (Zn++) as a cofactor to function properly.
Ramona and her family agree that what got Ramona through law school is what got her through obstacles all her life: her belief in her ability to succeed even when things are tough. Which part of the social cognitive theory addresses this view on Ramona’s successes in life?
A.
observational learning
B.
reciprocal determinism
C.
self-efficacy
D.
response tendency
Answer:
c
Explanation:
what would happen to a plant cell that suddenly lost its chloroplast
Which statement best explains whether Einstein’s idea is a theory or a law? It is a theory because it is a statement of fact that does not include an explanation. It is a theory because it was developed with many new experiments, and it explained the observations. It is a law because it is a statement of fact that does not include an explanation. It is a law because it was developed with many new experiments, and it explained the observations
Answer:
b
Explanation:
What does it mean if a form of energy appears over the arrow in a chemical reaction?
what kind of consumer is a grass carp
Non Example of phospholipids
Explain what feeding behaviors shown make a food web a better choice for displaying this information than an energy pyramid
This reflects the relationship of organisms to each other in a habitat, rather than to a small segment like a food chain.
What is an Energy pyramid?An ecological pyramid is defined as a graphical representation designed to show biomass or bio-productivity at each trophic level in a given ecosystem.
Energy pyramids only show the transfer of energy from one trophic level to another not the organisms and their food, so the biggest limitation of energy pyramids is that they are not applicable to food webs. They only apply to food chains.
Energy pyramids are conserved for only one range and restrict the feeding behavior to the source of energy of the organism which stated for food webs, they show a link between several organisms and a source of energy.
Thus, this reflects the relationship of organisms to each other in a habitat, rather than to a small segment like a food chain.
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which stage of the scientific process enables a scientist to check the work of another scientist?
Answer:
Peer review
Explanation:
It provides veracity to the already drawn conclusion of the scientific investigation before a report is publicly published in scientific journals. Other scientists can replicate the experiment to see whether they lead to the same conclusions. This ensures that the information is reliable to be cited or even built upon by other scientists.
The rungs or steps of DNA are made up of ____ which are attached to the sides or railings of DNA, which are made up of ___.
Answer: The steps are made of nitrogenous bases; deoxyribose sugars linked with phosphates.
Explanation: The rungs of the DNA are made of nitogenous bases (The nitrogenous bases are adenine (A), thymine (T), guanine (G) and cytosine (C) ) they are held together by weak hydrogen bonds.
The railings of the DNA are made of deoxyribose sugars which are alternating with phosphates. This part of the molecule is referred to as the "backbone".
Answer: The steps are made of nitrogenous bases; deoxyribose sugars linked with phosphates.
primary and secondary air pollutants can coexist in the atmosphere
true or false
whats the difference between a heterogeneous and homogeneous mixture
The terms heterogeneous and homogeneous refer to mixtures of materials in chemistry. The difference between heterogeneous and homogeneous mixtures is the degree at which the materials are mixed together and the uniformity of their composition.
A homogeneous mixture is a mixture where the components that make up the mixture are uniformly distributed throughout the mixture. The composition of the mixture is the same throughout.
There is only one phase of matter observed in a homogeneous mixture.
You can't pick out components of a homogeneous mixture or use a simple mechanical means to separate them. You can't see individual chemicals or ingredients in this type of mixture. Only one phase of matter is present in a homogeneous mixture.
A heterogeneous mixture is a mixture where the components of the mixture are not uniform or have localized regions with different properties. Different samples from the mixture are not identical to each other. There are always two or more phases in a heterogeneous mixture, where you can identify a region with properties that are distinct from those of another region, even if they are the same state of matter (e.g., liquid, solid).
Usually, it's possible to physically separate components of a heterogeneous mixture. For example, you can centrifuge (spin out) solid blood cells to separate them from the plasma of blood. You can remove ice cubes from soda. You can separate candies according to color.
How might a theory relate to a model
What are hot spots caused by?
A. volcanoes
B. Divergent plate boundaries
C. Mantle plumes
D. Subduction Zones
what organelle seperates the cell contents from the enviroment
What is the smallest particle representing water?
A.Hydrogen Atom
B.Molecule
C.Diatomic Oxygen
D.Oxygen Atom
Answer:
b . molecule
Explanation:
The smallest particle of water is 'molecule'.
Which statement is true about a liquid but not a gas? Question 7 options:
A. It has more internal energy than the solid state.
B. It has close to a constant volume as pressure is applied to it.
C. It allows particle to move past each other relatively easily.
D. It will change shape and take the shape of its container.
the answer is D on usatestprep
The right option is; D. It will change shape and take the shape of its container.
Liquid is one of the states of matter and is composed of molecules that are held together by intermolecular bonds. Liquid has a fixed volume, but it does not have a fixed shape. It takes the shape of its container. The density of a liquid is influenced by pressure, and it has surface tension.
1.) What is the Scientific definition of a fruit?
2.) What is the term for the distributing of the seeds after they mature?
3.) Differentiate between mechanical dispersal and and agent dispersal.
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During the Cambrian explosion that began the Paleozoic era, the new many forms of life that evolved....
A.Lived on land
B.Were invertebrates that lived in the sea
C. Were vertebrates covered with scales or fur
D. Were single celled
Please Help Me!!
Answer:
The answer is B
Explanation:
I got it right on the quiz
Hope it helps
Which item is the best example of a wheel and axle?
A.
automobile engine
B.
door knob mechanism
C.
bicycle
D.
telescope
What is scientific consensus
Answer:
In science a theory is said to be valid when there is a true scientific consensus, it cannot be judged only based on intuition, faith or authoritarianism of any kind.
This consensus is created in the scientific community based on its empirical, experimental and conceptual logic.
The scientific consensus accepts the veracity of theories from the repetition of tests under the same conditions and theoretical assumptions.
The Thermosphere contains a layer of charged particles called the ________________ which makes commucation by _________________ possible and is home to the __________________ (Nothern Lights). This is the layer in which ____________________ fly.
The Thermosphere contatins a layer of charged particles called the ionosphere which makes communication by radio waves possible and is home to the Aurora Borealis (Northern Lights). this is the layer in which satellites fly.
What is thermosphere?The layer of the atmosphere of the Earth that can be found directly above the mesosphere and below the exosphere is known as the thermosphere. The thermosphere is responsible for the majority of the ionosphere's composition because ultraviolet radiation induces photoionization and photodissociation of molecules within this layer of the atmosphere, which results in the formation of ions.
The thermosphere is essential to all forms of life on Earth because it shields these organisms from x-rays and some of the sun's ultraviolet rays, which are among the sun's most dangerous forms of radiation (its shortest wavelengths).
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Suppose a shopping mall is built near a rabbit warren, leaving less land available for rabbits. How will this affect the environment’s carrying capacity?
Answer:
With the construction of a shopping center near the habitat of rabbits, there will be a significant decrease in the population because food resources and in general the ecological niche will be negatively influenced.
The carrying capacity in general is reduced because the maximum population size that the environment can support indefinitely in a given period is reduced as there is not enough availability of resources in the environment
The carrying capacity is a measure of the greatest or maximum amount of species that can be catered for given the amount of resources available in the environment. Hence, due to the reduction in space, the carrying capacity of the environment will decease.
The carrying capacity of an environment is directly proportional to the amount of resources available, which could support the survival and growth of the organisms. The amount of land or living area is a factor which also determines the carrying capacity of an environment. Due to the reduction in living area available to the rabbits as a result of the constructed mall, the carrying capacity will decrease as there won't be enough space to support the initial rabbit population any longer.Therefore, the carrying capacity of the environment is reduced due to the limited land area available for the rabbits to occupy.
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How are smaller molecules like o2 and co2 able to pass through the openings of a cell membrane