can some on help me with the matter unit test i realy need help and my sister isnt helping me plz help
Of course! What do you need help with specifically?
Angela wants to conduct an experiment to test how different types of music impact the growth of plants. What should Angela use as constant variables in the experiment?
For Angela's experiment, the constant variables should be kept the same throughout the experiment. That way, any differences in plant growth can be attributed to the variable being tested - the type of music.
Here are some examples of constant variables that Angela should consider:
1. Type of plant: Angela should use the same type of plant throughout the experiment, so that any differences in growth can be attributed to the type of music rather than the plant species.
2. Amount of water: Angela should water all of the plants with the same amount of water at the same time each day.
3. Amount of sunlight: Angela should place all of the plants in the same location with the same amount of sunlight exposure.
4. Soil type: Angela should use the same type of soil for all of the plants.
By keeping these variables constant, Angela can ensure that any differences in plant growth can be attributed to the variable she is testing - the type of music.
Cellular respiration is a chemical process in cells that releases energy the cells need to function. What statement below is true about this reaction.(1 point)
Responses
The process of cellular respiration releases energy because the energy that is released when the bonds are formed in CO2 and water is equal to the energy required to break the bonds of sugar and oxygen.
The process of cellular respiration releases energy because the energy that is released when the bonds are formed in CO, 2, and water is equal to the energy required to break the bonds of sugar and oxygen.
The process of cellular respiration releases energy because the energy that is released when the bonds are formed in CO2 and water is less than the energy required to break the bonds of sugar and oxygen.
The process of cellular respiration releases energy because the energy that is released when the bonds are formed in CO, 2, and water is less than the energy required to break the bonds of sugar and oxygen.
The process of cellular respiration releases energy because the energy that is released when the bonds that are formed in CO2 and water is lost when bonds of glucose and oxygen are broken.
The process of cellular respiration releases energy because the energy that is released when the bonds that are formed in CO, 2, and water is lost when bonds of glucose and oxygen are broken.
The process of cellular respiration releases energy because the energy that is released when the bonds are formed in CO2 and water is greater than the energy required to break the bonds of sugar and oxygen.
The process of cellular respiration releases energy because the energy that is released when the bonds are formed in CO, 2, and water is greater than the energy required to break the bonds of sugar and oxygen.
The process of cellular respiration releases energy because the energy that is released when the bonds are formed in CO2 and water is less than the energy required to break the bonds of sugar and oxygen.
In a grassland ecosystem, grass is the producer. The grass is eaten by rabbits. The rabbits are eaten by foxes. And the foxes are eaten by hawks. If the grass produces 83,721 kcalm2yr of energy, how much energy will the apex predator receive?(1 point)
Responses
83.721 kcalm2yr83.721 kcalm2yr
837.21 kcalm2yr837.21 kcalm2yr
8.3721 kcalm2yr8.3721 kcalm2yr
8,372.1 kcalm2yr
The energy transferred between different trophic levels in an ecosystem follows the 10% rule, where only 10% of the energy is transferred from one level to the next. Therefore, the apex predator (hawk) will receive significantly less energy than the grass producer.
To calculate the amount of energy the apex predator (hawk) will receive, we need to multiply the energy produced by the grass (83,721 kcalm2yr) by the efficiency of energy transfer between each trophic level (10%).
83,721 kcalm2yr x 0.1 = 8,372.1 kcalm2yr
Therefore, the apex predator (hawk) will receive 8,372.1 kcalm2yr of energy.
Soy is nutrient dense. Most soy products are fed to farm animals, but people who eat plant-based diets typically use soy as the base of their diet. However, soy is often grown in environmentally unfriendly ways. Using this information, which of the following diets would minimize the environmentally damaging effect of soy?(1 point)
Responses
mostly farm animals
mostly farm animals
a mix of farm animals and hunted animals
a mix of farm animals and hunted animals
a typical plant-based diet
a typical plant-based diet
a mix of plant-based and farm animals
A mix of plant-based and farm animals would minimize the environmentally damaging effect of soy.
This is because animal agriculture (raising farm animals) often requires large amounts of soy for animal feed, leading to deforestation, habitat destruction, and water pollution. On the other hand, a plant-based diet that relies heavily on soy can also contribute to environmentally unfriendly soy production if the soy is not grown sustainably.
By consuming a mix of plant-based and farm animal products, individuals can help reduce the overall demand for soy while still obtaining important nutrients from both plant and animal sources. This can contribute to a more sustainable and environmentally friendly food system overall.
Which of the following is a way that populations of species are limited?(1 point)
Responses
Populations are limited by how much food there is for them.
Populations are limited by how much food there is for them.
Populations are not limited naturally; without human influence, populations of species would grow exponentially.
Populations are not limited naturally; without human influence, populations of species would grow exponentially.
Population size is generally unpredictable.
Population size is generally unpredictable.
The population of a species cannot grow beyond a billion individuals before becoming overpopulated.
Populations are limited by how much food there is for them.
Food availability is one factor that limits the size of a population. There is a limit to how many individuals the environment can support, and that limit is largely determined by the availability of resources like food, water, and shelter. As the population of a species grows, competition for these resources increases, which can cause the population growth rate to decrease and eventually level off. Other factors that can limit populations include predation, disease, and environmental factors like temperature and rainfall.
Which would cause Burmese pythons to become overpopulated?(1 point)
Responses
They have no natural predators.
They have no natural predators.
They cannot adapt to their environment.
They cannot adapt to their environment.
Their genes cause them to have too many children.
Their genes cause them to have too many children.
They adapted to their environment.
If Burmese pythons have no natural predators, this could cause them to become overpopulated.
Natural predators help keep populations in check by consuming some of the individuals in the population. Without predators, the population of the species can grow unchecked, leading to overpopulation.
Burmese pythons are an invasive species in Florida and have devastated local wildlife populations due to their lack of natural predators. This has caused concern for the ecological health of the region and efforts have been taken to control their populations.
Compare the adaptation rate of humans to moths.(1 point)
Responses
Humans adapt faster than moths due to moths' shorter lifespans.
Humans adapt faster than moths due to moths' shorter lifespans.
Humans adapt slower than moths due to moths' shorter lifespans.
Humans adapt slower than moths due to moths' shorter lifespans.
Humans adapt faster than moths due to humans' intelligence.
Humans adapt faster than moths due to humans' intelligence.
Adaptation happens at about the same rate regardless of species.
It is difficult to make a direct comparison of the adaptation rate of humans and moths, as the speed of adaptation can vary greatly depending on the specific context and the factors driving adaptation. However, in general:
- Both humans and moths are capable of adapting to changing environments over time, but the mechanisms of adaptation may differ.
- Moths have a shorter lifespan and a faster reproductive rate than humans, which means that they may be able to adapt to changes in their environment more quickly through natural selection and genetic evolution.
- Humans, on the other hand, have the advantage of intelligence and technology, which can allow them to adapt more quickly to changes in their environment through cultural evolution and intentional modifications to their surroundings.
Overall, the rate of adaptation can vary greatly between species and depends on many factors, including lifespan, reproductive rate, genetic diversity, and environmental pressures.
Which of these is the clearest sign that two populations are different species?(1 point)
Responses
If two populations produce only infertile children together, they are different species.
If two populations produce only infertile children together, they are different species.
If two populations have significant genetic differences, they are different species.
If two populations have significant genetic differences, they are different species.
If two populations live very far from each other and are geographically separated, they are different species.
If two populations live very far from each other and are geographically separated, they are different species.
If two populations are adapted to consume different foods, they are different species.
If two populations have significant genetic differences, they are different species is the clearest sign that two populations are different species.
The biological species concept defines a species as a group of organisms that can reproduce with one another and produce viable, fertile offspring. If two populations cannot interbreed, or if they can but their offspring are infertile or unable to survive, they are considered different species. This can be due to genetic differences that accumulate over time as the populations evolve separately.
While geographic and ecological barriers can also contribute to the formation of new species, genetic differences are the most definitive indicator of two populations being different species.
What is true about scientists who study the evolution of species?(1 point)
Responses
Scientists observe speciation through studying organisms' adaptation to changing environments.
Scientists observe speciation through studying organisms' adaptation to changing environments.
Scientists can only study the process of speciation through studying fossils.
Scientists can only study the process of speciation through studying fossils.
Scientists have not successfully observed the process of speciation.
Scientists have not successfully observed the process of speciation.
Scientists have observed speciation in progress in populations in different habitats.
Scientists have observed speciation in progress in populations in different habitats.
There are many ways in which species can evolve over time, including adaptation to changing environments, geographic isolation, and genetic drift. While the process of speciation can take many years, scientists have been able to observe it happening in real time in certain populations.
For example, researchers have observed the emergence of new species in populations of birds, insects, and plants that have become separated from their ancestors due to geographic or ecological factors. By studying changes in morphology, genetics, and behavior, scientists have been able to document the gradual divergence of these populations into distinct species.
Therefore, it is true that scientists have observed speciation in progress in populations in different habitats.
Select the two correct responses(1 point)
Since 1983, the amount of carbon dioxide in the ocean is
increasing
staying the same
decreasing
and the pH of ocean water is
decreasing
increasing
staying the same
Since 1983, the amount of carbon dioxide in the ocean is increasing, and the pH of ocean water is decreasing.
Which of the following describes a positive correlation? (1 point)
Responses
As the amount of reactant in a reaction is increased, the amount of product does not change.
As the amount of reactant in a reaction is increased, the amount of product does not change.
As fertilizer use is decreased, the number of insects on a farm increases.
As fertilizer use is decreased, the number of insects on a farm increases.
As the number of vaccines administered increases, the number of infections decreases.
As the number of vaccines administered increases, the number of infections decreases.
As the amount of heat increases, the amount of water evaporated increases.
As the number of vaccines administered increases, the number of infections decreases is the description of a positive correlation.
In a positive correlation, as the value of one variable increases, the value of the other variable also tends to increase. In this case, as the number of vaccines administered increases, the number of infections decreases, which indicates a positive correlation.