Answer:
A: LAYER
Explanation:
simple i took the test
Fossil remains have been found in rocks of all ages. Fossils of the simplest organisms are found in the oldest rocks, and fossils of more complex organisms are in the newest rocks. This supports Darwin's theory of evolution, which states that simple life forms gradually evolved into more complex ones.
Evidence for early forms of life comes from fossils. By studying fossils, scientists can learn how much (or how little) organisms have changed as life developed on Earth.
There are gaps in the fossil record because many early forms of life were soft-bodied, which means that they have left few traces behind. What traces there were may have been destroyed by geological activity. This is why scientists cannot be certain about how life began.
Fossils provide a snap shot of the past and allow us to study how much or how little organisms have changed as life developed on Earth.
How does heart rate change during and after an exercise is performed for two different periods of time?
Answer: During exercise, your heart usually beats faster to deliver more oxygen to your body cells at a faster rate while after an exercise your heart rate will typically drop as soon as the heart start to rest
Explanation:
What is the only way to see a virus?
Answer:
metabolically inert, infectious agent that replicates only within the cells of living hosts, mainly bacteria, plants, and animals: composed of an RNA or DNA core, a protein coat, and, in more complex types, a surrounding envelope.
Explanation:/ Hope helps
Answer:
Using an electron Microscope, as these are micro-organisms and cannot be seen by the naked eye.
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Which situation below would have the strongest gravitational force between them?
A 10 kg mass and a 10 kg mass at 30 km apart.
A 2 kg mass and a 2 kg mass at 10 km apart.
A 10 kg mass and a 10 kg mass at 10 km apart.
A 10 kg mass and a 2 kg mass at 30 km apart.
True or false
DNA moves through a gel because it is negatively charged and is attracted to the positive electrode.
Answer:
it is true
Explanation:
Fruit flies feed on decomposing fruit.
The smell of the fruit attracts the fruit flies.
Design an investigation to find out if the smell of decomposing apples attracts fruit flies more than the smell of decomposing bananas.
Include experimental details in your answer and write in full sentences.
(6)
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Answer:
Hypothesis: the smell of decomposing apples may attract fruit flies more than the smell of decomposing bananas.
Experiment: two separated fruit fly populations with a sample size statistically significant (N: 500 or higher) must be grown in clean boxes. Subsequently, the fruit fly populations should be simultaneously released in a tube that connects the two boxes with other two boxes containing: -Box 1: apples in decomposition and -Box 2: bananas in decomposition. After one hour, the fruit boxes must be simultaneously closed and the fruit flies must be counted. Finally, it is necessary to apply a statistical index in order to calculate the significance between groups (i.e., fruit flies closed in both fruit boxes).
Positive control: fruit flies released and counted in boxes containing apples and bananas in normal conditions.
Negative control: fruit flies released and counted in clean boxes.
Theory: the scent of breaking down apples may draw in natural product flies more than the scent of breaking down bananas.
Experiment:
Two isolated natural product fly populaces with a test measure measurably critical (N: 500 or higher) must be developed in clean boxes.
Hence, the natural product fly populaces ought to be at the same time discharged in a tube that interfaces the two boxes with other two boxes containing: -Box 1: apples in deterioration and -Box 2: bananas in decay.
After one hour, the natural product boxes must be at the same time closed and the natural product flies must be checked.
Positive control: natural product flies discharged and tallied in boxes containing apples and bananas in ordinary conditions.
Negative control: natural product flies discharged and numbered in clean boxes.
Experimental DetailsExperimental information are collected through dynamic mediation by the analyst to create and degree alter or to make distinction when a variable is modified.
Test information regularly permits the analyst to decide a causal relationship and is ordinarily projectable to a bigger populace.
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The endomembrane system is composed of
Answer:
=niberghb4yahf erusifnruesz bguia8ysbu9vtgbuiyvc
Explanation:
vs vhg syzvcyufdzs dbshsf vcryesg
u r welcome t}{ot
Answer:
The endomembrane system (endo = “within”) is a group of membranes and organelles (Figure 1) in eukaryotic cells that works together to modify, package, and transport lipids and proteins.
Give three pieces of geological evidence that are inconsistent with the geologic time scale of millions of years.
Answer:
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.
Explanation:
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On a phylogenetic tree, what do the branch lengths represent?
The age of the organisms
amount of genetic change since divergence
amount of genetic change since convergence
The age of divergence
Answer:
the evolutionary time between two nodes
Explanation:
Branch lengths indicate genetic change i.e. the longer the branch, the more genetic change (or divergence) has occurred
Animals that eat plants get the energy stored in the plants and use it for things such as moving around. However, only a small fraction of the energy in the plants gets converted to useful energy for the animal. Most of the energy is lost to heat. How can this situation be used to support the idea of the law of conservation of energy?
A. A The amount of energy used by the animals, added to the amount of energy lost to heat, equals the amount of energy from the plants eaten by the animal.
B. B While some animals get their energy from plants, there are also many animals that get energy by eating other animals, and still other animals that eat both.
C. C All the energy lost to heat by animals provides the heat energy that plants need to live and grow, allowing them to make their own food.
D. D When plants and animals die, their energy goes into the soil, where growing plants can absorb it, turn it into food, then transfer this energy to animals.
Answer:
A. A The amount of energy used by the animals, added to the amount of energy lost to heat, equals the amount of energy from the plants eaten by the animal.
Explanation:
The law of conservation of energy states that "energy can neither be created nor destroyed but can only be changed from one form to another". This means that during the energy transfer cycle, energy cannot be created or destroyed by any process, however, it can only be changed from one form to another via the different processes undergone by living organisms.
This question describes how animals get food needed for their life processes by feeding on plants. However, they (animals) make use of only a little fraction (about 10%) of the total energy in plants they feed on, because most of the energy (about 90%) is lost as heat when the plant undergoes metabolic activities.
This situation describes the law of conservation of energy in the statement that "The amount of energy used by the animals, added to the amount of energy lost to heat, equals the amount of energy from the plants eaten by the animal" because it shows that energy cannot be created neither can it be lost, hence, the sum of the energy that was converted to heat energy by plants and the energy utilized by the animal will give the total amount of energy initially present in the plant before the animal fed on it.
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What are 5 ways carbon dioxide is released into the environment?
What is the role of decomposers in the carbon/oxygen cycle?
How do humans impact the carbon/oxygen cycle
Answer:
Explanation:
*organisms respire or decompose (decay), carbonate rocks are weathered, forest fires occur, and volcanoes
*In terms of this cycle, the decomposers metabolize oxygen and release carbon dioxide. The primary producers then use these nutrients to fuel photosynthesis, which provides oxygen for the consumers
*burning fossil fuels, changing land use, and using limestone to make concrete all transfer significant quantities of carbon into the atmosphere.
What does an urn-shaped age pyramid represent? A. a stable population growth B. a low birth rate C. a low death rate D. a growing population
Answer: B
Explanation:
because it’s supposed to show a declining population
Answer:
B. a low birth rate
What does flora and fauna mean in terms of science?
Answer:
Flora refers to plant life, while fauna refers to animals!
Explanation:
Which stage is the last stage of speciation?
Answer:
The populations become adapted to different environments and eventually become so different that they cannot imterbreed to produce fertile of spring.
Speciation is the evolution of one species into two different kinds , and when they become isolated , that is the final step , since they cannot interbreed any longer .
Explanation:
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Select the correct answer.
A herd of sheep moves up the mountain to graze during summer, and migrates to the valley during winter. What type of migration do the sheep follow?
A.
one direction only
B.
seasonal movement
C.
daily movement
D.
one return journey
1. What is a disadvantage to living in a group?There could be less competition
It makes it easier to find a mate
There are more individuals to watch out for predators
There is an increased risk of parasitism and disease
Answer:
There is an increased risk of parasitism and disease
Explanation:
Answer:
There is an increased risk of parasitism and disease
Explanation:
I just had this question
The breakdown of pollutants, water
purification and soil formation are valuable
services provided by:
A. holistic sources
B. positive feedback loops
C. ecosystems
D. negative feedback loops
HELP ASAP
The breakdown of pollutants, water purification and soil formation are valuable services provided by ecosystem.
What do you mean by ecosystem?An ecosystem consists of all the organisms and the physical environment with which they interact. These biotic and abiotic components are linked together through nutrient cycles and energy flows.
There are four basic components of an ecosystem: abiotic substances, producers, consumers, and reducers, which are also known as decomposers. Abiotic means that a substance is devoid of life, it is physical and not derived from living organisms.
Ecosystems are organized to better understand the frame of reference in which they are being studied. They are organized from smallest to largest; organism, population, community, ecosystem.
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House sparrows from England were released in the United States. They have competed with native bluebirds. These house sparrows are __________.
Answer:
House sparrows from England were released in the United States. They have competed with native bluebirds. These house sparrows are invasive species.
Explanation:
House sparrows are invasive species that were introduced in the United States and once established these birds started to compete with native species and managed to displace many native birds. They seriously affected farmlands. Now they are everywhere always associated with human being presence.
Biologic Invasive species: It refers to new species that disperse and establish in a new area far or out of their original distribution range. Once established, these species expand their distribution from the first invaded spot and overgrows. As they expand, they compete with other species for resources, such as food sources, water, shelter, radiation, exposure, among others. Species are considered to be invasive because of their high reproductive rate, population growth, and interaction with native species, which provokes huge damages in the native ecosystems. It is very common for these species to scape and start new populations in the new area, where they have less environmental pressure and better conditions than in their origin area -fewer predators, more resources, better nitches-, and these factors favor their establishment.
There are some typical steps in an invasion process:
1) Introduction or dispersion to the new area,
2) Naturalization. The new species establishes in the new area. It can grow, reproduce, and make use of resources.
3) Overgrowth and uncontrolled expansion.
4) Interaction with other species.
5) Stabilization.
In some cases biologic invasions are natural processes, that occur in small groups of individuals that can expand to other ecosystems, and the appearing or despairing of barriers promotes their expansion. But these biologic invasions have been accelerated by human beings, referring to this as "human-assisted invasions".
A doctor hypothesizes that a patient's digestive system is not properly secreting digestive enzymes. Which of the following would be a plausible diagnosis?
The pancreas is no longer secreting pepsin.
The stomach is no longer secreting pepsin.
The stomach is no longer secreting bile.
The pancreas is no longer secreting bile.
Answer: B. The stomach is no longer secreting pepsin.
Pepsin is a protein digesting enzyme that performs protein digestion in the stomach.
Bile is produced by the liver for the digestion of lipids in small intestine. The pancreas secretes pancreatic juice, not bile.
Scott moved from florida to michigan january, and he thinks its freezing! Why is it so much colder in michigan than it is in florida during the winter?
Answer:
Michigan is farther north and gets less sun because the distance from the equator
Explanation:
Look at a globe or a map with latitude
Which of these DOES NOT affect the carrying capacity of an ecosystem?
1.variety of different food
2.total amount of food
3.competition for food
4.food being available over time
Identity the fungus type pictured below. (4 points)
Zygote fungi
Imperfect fungi
Sac fungi
Club fungi
Answer:
D: club
Explanation:
according to the article, what changed have occurred over the last twenty years to improve conditions on the galápagos islands? check all that apply
A fair die is tossed. what is the probability of getting either 1, 2, 3, 4, 5 or 6.
Answer:
The probability is 1/6
Explanation:
Since there are 6 faces on a dice we can tell that there is a chance to get each number only once. This makes the probability 1/6 or 16.6%
Answer:
the answer would be 1 over 6
Explanation:
because there are six faces on a dice theres a chance of only getting each number once or twice
The diagram below shows fossils in three layers of rocks.
Picture shows three layers of rocks labeled Layer A, Layer B, and Layer C from bottom to top. Each layer of rock has a fossil.
Which of these conclusions is most likely correct about the organisms found in the layers of rocks?
The organism in Layer A is more complex than the organism in Layer B.
The organism in Layer B is more complex than the organism in Layer C.
The organism in Layer C is a modern form of the organism in Layer B.
The organism in Layer A is a modern form of the organism in Layer B.
Answer:
c
Explanation:
not sure about what does complex means, but if we according on theory of superposition - the top layer of rocks is younger than bottom
it means that the toppest layer is modern
We can observe three strata of fossil-bearing rocks in the diagram. We must take into account the idea of fossil succession in order to determine the conclusion regarding the organisms identified in these layers.
The theory of fossil succession holds that fossils found in rock layers are placed in a specific order. The oldest fossils are found in the bottom layers, while the youngest fossils are found in the top layers, which represents the relative ages of the fossils.
The conclusion that "the organism in Layer C is a modern form of the organism in Layer B" is most likely accurate based on this premise. As a result, the creature in Layer C reflects a more recent or evolved form of the organism in Layer B and existed before the organism in Layer B.
Overall, the concept of fossil succession aids in our comprehension of the relative ages and evolutionary connections of the creatures found in various rock layers.
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What are causes of climate change?
please elaborate : ) thank you!
why does our planet appear blue?
Answer:
Mars is the red planet; the Moon is an ashy grey; Saturn shines yellow and the Sun is a brilliant, blinding white. But our planet, when seen from the depths of space, whether we rise up above our world only slightly, in low-Earth orbit, or whether we travel to the outer reaches of our Solar System, shines a glorious blue.
Explanation:
Water vapor. The most abundant greenhouse gas, but importantly, it acts as a feedback to the climate. Water vapor increases as the Earth's atmosphere warms, but so does the possibility of clouds and precipitation, making these some of the most important feedback mechanisms to the greenhouse effect.
Carbon dioxide (CO2). A minor but very important component of the atmosphere, carbon dioxide is released through natural processes such as respiration and volcano eruptions and through human activities such as deforestation, land use changes, and burning fossil fuels. Humans have increased atmospheric CO2 concentration by more than a third since the Industrial Revolution began. This is the most important long-lived "forcing" of climate change.
Methane. A hydrocarbon gas produced both through natural sources and human activities, including the decomposition of wastes in landfills, agriculture, and especially rice cultivation, as well as ruminant digestion and manure management associated with domestic livestock. On a molecule-for-molecule basis, methane is a far more active greenhouse gas than carbon dioxide, but also one which is much less abundant in the atmosphere.
Nitrous oxide. A powerful greenhouse gas produced by soil cultivation practices, especially the use of commercial and organic fertilizers, fossil fuel combustion, nitric acid production, and biomass burning.
Chlorofluorocarbons (CFCs). Synthetic compounds entirely of industrial origin used in a number of applications,
You might have heard that the ocean is blue because the sky is blue, and water reflects the skies. Well, the sky is blue; that’s for certain. And the sky is blue because our atmosphere is more efficient at scattering blue (shorter-wavelength) light than red (longer-wavelength) light. This is the reason why the earth looks blue in color.
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Which materials are excreted through sweat glands in the skin?
Answer:
carbon dioxide, hydrogen, and water
salt, urea, and water
urine, alcohol, and water
fats, ammonia, and water
Answer:
Not A absolutely not A
Explanation:
Which statement describes the impact of ocean currents on climate?
Ocean currents create changes in the temperature of air over land masses.
Ocean currents cause the temperature of air over large bodies of water to change.
Ocean currents move cold water from the equator to the poles, creating cool weather regions.
Ocean currents carry warm water from the poles to the equator to create warm weather regions.
Save and Fyit
Ways
Answer:
2
Explanation:
An ocean current is defined as the continuous or permanent movement of sea water which is caused by different forces such as the coriolis effect, wind, temperature, breaking waves and salinity differences.
Ocean currents play important role in climate changes of large water bodies as they transport cold water to the tropics from the poles and precipitation and warm water from the equator back toward the poles. Ocean current restricts uneven distribution of sunlight reaching earth surface which influence the temperature of air above water bodies. If there will be no ocean currents, the temperature of water bodies will be very hot and very cold at poles.
Hence, the correct option is 2.
Answer:
Ocean currents cause the temperature of air over large bodies of water to change
Explanation:
Which of these work together in a feedback loop?
A. Insulin and glucagon
B. Pancreas and large intestine
C. Testes and sweat glands
D. Glucose and calcium ions
Answer:
Insulin and glucagon
Explanation:
I got this answer correct
Since we can’t drink ocean water due to its salt content, why is polluting the oceans so much a concern for people?
Answer:
Explanation: because animals such as bear get the food from fish by polluting the ocean you first kill of fishes and the bear who need those animals to survive
Can somebody please help me with this question?
Answer:
Segmented Worm
Explanation: