In this article the author explains what scientists are trying to find out. What are the scientists in the article trying to find out?
Question 2 options:
A .when sulfur first appeared in Earth’s early atmosphere
B .how the proportions of different sulfur isotopes change in the geologic record
C .how the ozone layer formed and the effects of its formation
D .when oxygen increased in Earth’s early atmosphere
Hi, did you forget to mention that this question is about the article "The Rise of Oxygen in the Earth's Atmosphere" by American Museum of Natural History
Answer:
D. when oxygen increased in Earth’s early atmosphere
Explanation:
Right at the beginning of the article we can find out what scientists are trying to discover. This is because the introduction of the article introduces us to Grant Young and Jay Kaufman, a university professor and a geologist, respectively, who are the main scientists in the study that seeks to discover and set firm dates for the increase in oxygen in the Earth's primitive atmosphere.
Umm I need some help please by 4pm
Answer: the two top ones go with supporting evolution
and the rest goes with contridicts evolution
Explanation: hope that helped
What is the best definition of activation energy
Answer:
The term Activation Energy was introduced in 1889 by Svante Arrhenius, a Swedish scientist. It is defined as the least possible amount of energy (minimum) which is required to start a reaction or the amount of energy available in a chemical system for a reaction to take place.
Hope that helps :)))
Manatees are an endangered mammal species that live in bodies of water in Florida. Manatees migrate from summer habitats to winter habitats and look for safe areas to feed and raise their young. People in boats need to give space to manatees to protect them from harm. What might conservationists do to increase manatee populations?
A. Increase the number of boats
B. increase the local fish population
C. increase the oxygen available in the water
D. increase the amount of protected habitat available
Answer: Im pretty sure it´s D.
Explanation: Manatees like to raise and feed their young in safe places so if we increase the amount of protected areas their population is more likely to increase.
Hope this helps!
Ralph wanted to breed a pea plant that produced only purple flowers. He continued to breed purple-flower producing pea plants together over six generations. The results of Ralph's selective breeding are shown above. What did the selective breeding do to the population of pea plants?
A.
increased its genetic diversity
B.
decreased its genetic diversity
C.
caused a new species of pea plant to form
D.
caused a pea plant to exhibit a new characteristic
Answer:
B. decreased its genetic diversity
Explanation:
if the number of chances the white flower decreases, and there are more purple chances, then there is less genetic diversity.
Answer:
It's B
Explanation:
The complete breakdown of glucose through aerobic respiration in muscle cells
results in the net production of a maximum of
36 ATP molecules.
36 O2 molecules
36 ADP molecules
36 CO2 molecules.
Answer:
36 ATP molecules
Explanation:
Cellular respiration is a metabolic process undergone by all living cells. It is the way cells obtain energy by breaking down food molecules to yield energy in form of ATP needed for their life processes. Cellular respiration can occur in the presence of oxygen (aerobic) or in the absence of oxygen (anaerobic).
Aerobic cellular respiration is that which occurs when oxygen is present in the cells. It consists of three main stages viz: Glycolysis, Kreb's cycle and Oxidative Phosphorylation (ETC). Glycolysis is the first stage of aerobic respiration involving the breakdown of glucose into pyruvate and a net gain of 2ATP molecules.
Kreb's cycle or TCA is the next stage of aerobic respiration involving the production of electron carriers (NADH and FADH2) and release of 2ATP molecules as well.
Electron transport chain (ETC), which is the last stage of aerobic respiration involves the most yield of ATP molecules. Electrons are passed from one molecule to another in this stage, with oxygen being the last electron acceptor. 32 ATP molecules is produced at this stage.
In totality, a net production of 2+2+32 = 36 ATP molecules is the maximum produced after aerobic respiration in a muscle cell.
people spray pesticides on crops to kill insects that eat and destroy crops. however, these insects are becoming resistant to the pesticides. Explain how this could happen.
if a person takes antibiotics, the resistant bacteria will die. if this process continues,most of the bacteria population will have the trait for antibiotic resistance. if antibiotics are taken rarely, the population will not have time to adapt, and the bacteria will die. the more antibiotics are taken, the more chance the bacteria have to adapt and develop resistance
Since the bugs are being sprayed by the pesticides so often they start to build resistance just like how people build tolerance to alcohol. The more often the bugs get sprayed with pesticides the more they can tolerate and adapt to the pesticides.
Describe what the completeness or integrity of an ecosystem biodiversity is used to measure
Answer:
Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations. Biodiversity describes the variety of species found in Earth`s terrestrial and oceanic ecosystems. The completeness or integrity of an ecosystem`s biodiversity is often used as a measure of its health.
Explanation: Disruptions can really mess with any physical or biological component of a ecosystem then that ecosystem leads to shifts in all populations. I hope this answer helps you!
The completeness or integrity of an ecosystem biodiversity is used to measure its health.
Biodiversity refers to the different types of organisms present in an
ecosystem. A healthy ecosystem is one which has a high degree of
biodiversity present in it.
High biodiversity leads to a high stability and productive rates as a result of
the high resources present. An unhealthy ecosystem has low integrity or
completeness in its biodiversity .This is why the integrity of an ecosystem
helps to measure its health.
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Changes to the global climate could include
a changes to temperature
b. changes to pressure
C. changes to precipitation
d. all of the above
Please select the best answer from the choices provided
Answer:
D
Explanation:
All of the above are parts of the climate that could be subject to change.
Answer:
B
Explanation:
In living things, what is the source of the Carbon 14 that is used in radiocarbon dating?
In living things, the source of Carbon-14 that is used in radiocarbon dating would be Carbon Dioxide in the atmosphere.
What threat do rusty crayfish pose as an invasive species?
a.
Rusty crayfish are poisonous.
b.
They consume the food supply.
c.
They kill the native crayfish.
d.
They eat all the young fish.
e.
They clog the natural rivers.
Answer:
They kill the native crayfish
Explanation:
this is because they are more aggresive
Answer:
Option B
Explanation:
The answer is option B or "they consume the food supply ." Rusty crayfish are known as a invasive species because they are legal to buy, sell, and transport but putting them into public waters can have a negative impact on the waters. In this case Rusty crayfish will have a negative impact on a ocean or a lake because it destroys aquatic plant beds which some organisms use as homes, they also happen to be really aggressive eating animals so consuming the food supply for other animals is the main threat the rusty crayfish pose.
Hope this helps.
What is the role of decomposers in an ecosystem?
A Decomposers break down dead organisms and return nutrients to
the ecosystem
B. Decomposers are herbivores.
C. Decomposers convert solar energy to chemical energy through the
process of photosynthesis.
D. Decomposers feed on small reptiles and mammals.
Which of the following best describes how energy is transferred in a food web?
A. A All energy is transferred to each level of a food web.
B. B Energy flows from producers to one or more levels of consumers.
C. C Consumers transfer their energy to producers.
D. D Decomposers get their energy directly from the sun.
Answer:
B.
Explanation:
Energy flows from producers to one or more levels of consumers. Think of it this way:
A banana tree grows in the forest.
A monkey eats the bananas off of the tree, it now consumes the energy provided by the banana.
(whatever animal kills monkeys) kills the money for food, they have now consumed the energy of the monkey, as well as the banana the monkey has eaten previously.
The web continues, and energy continues to be distributed to each level of consumer, all starting with a single producer.
Which trophic level contains the organisms that are the source of all chemical energy used in an ecosystem?
parasites
herbivores
producers
decomposers
Answer:
b
Explanation:
Which process is necessary for sexual reduction but not asexual reproduction.
A.Production of new cells.
B. Copying from genetic material.
C. Meiosis.
D. Division of cells
Answer:Meiosis
Explanation:
Answer:
A.Production of new cells.
Explanation:
The fossil record reveals that the diversity of flowering plants and the diversity of certain insect groups increased at the same time. How might you explain this?
Answer:
Insects and flowers are connected with each other for several life purposes such as for food, habitat and pollination.
The cause of diversity in flower and insects is associated with the process of pollination. In the process of pollination, both insects and flowers are mutually get benefits.
Insects move flower to flower in search of food and in the process it also carry pollen from flower to flower as well. Through insects the pollen reaches to different flower and show diversity and at the same time insects feed on various types of flowers and reproduce generation with variations.
Hence, the process of pollination makes a relationship between flower and insects diversity at the same time.
Describe the similarities and differences of a community and a population.
PLZ HELP I ONLY HAVE ONE MORE DAY! I WILL MARK BRAINLIEST
Answer:
community: collection of populations. population: one area specified specie.
Explanation:
let's suppose you have a home garden where you have dogs birds crops trees and each one is a different specie.If you encounter on individual level then it's specie but on collective level- community-perhaps it's easy to say and give the example of pound community and field of wheat -population-.
What pumps oxygen-rich blood to the body?
A. Right Atrium
B. Right Ventricle
C. Left Atrium
D. Left Ventricle
Select the best answer for the question.
19. The component that makes up the majority of blood is
itled fold
O A. platelets.
O B. plasma.
O C. white blood cells.
D. red blood cells.
Answer:
B. Plasma
Explanation:
We normally have 55% plasma in our blood stream, plasma pumps out all of the waste of products and brings nourishment to our metabolism.
Invasive species are one of the major threats to blodiversity. These species multiply quickly and compete with native species for food, sunlight,
space, and other resources. On the map, determine the area where native species will have limited resources available to them due to invasion.
Answer:
Top Left
Explanation:
On the map, the top-left part of North America, which is the Canada part, has the most threats due to the invasive species, which are also threats to the native species as they can easily multiply and eat the native prey.
What is an invasive species?Invasive species can outcompete native species for resources such as food, water, and habitat. This can lead to declines in native species populations, which can impact the entire ecosystem. Invasive species can alter the structure of ecosystems and disrupt natural processes. For example, some invasive plants can change the soil chemistry, while some invasive animals can alter the food web and cause changes in the behavior of native species. Invasive species can introduce new diseases to native populations, which can have devastating effects. For example, the introduced fungus that causes white-nose syndrome has killed millions of bats in North America.
Hence, On the map, the top-left part of North America has the most threats due to the invasive species, which are also threats to the native species.
Learn more about the invasive species here.
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What percent of the offspring will be
pink, if we cross two pink tulips?
50 %
100%
25 %
Which is a density-independent factor?
food
water
drought
habitat
Answer:
habitat
Explanation:
Density-independent factors, such as weather and climate, exert their influences on population size regardless of the population's density. In contrast, the effects of density-dependent factors intensify as the population increases in size.
Question 4 of 10
2 Points
Which happens to a developing child first?
A. Teeth begin to form.
B. The heart begins beating.
C. Eyebrows appear.
D. The eyes are able to see.
Answer:
B
Explanation:
A child needs a beating heart to live, if not they cam't develop.
Which structure is at work when the body deals with reflex actions?
meninges
brain stem
vertebral column
Ospinal cord
Answer:
spinal cord
Explanation:
Reflex actions are the involuntary action of the body in response to a signal or stimulus. The reflex action of body is controlled by spinal cord.
Reflex arc acts as a neural pathways that transmit impulse to the brain via spinal cord. Sensory neurons pass through synapse in the spinal cord which activate spinal motor neuron to act immediately without any delay.
Immediate taking off hand from hot oven is an example of reflex action, which is regulated by spinal cord.
Hence, the correct option is spinal cord.
Answer: Meninges, brain stem, vertebral column, spinal cord.
Explanation:
A reflex action can be defined as the involuntary and instantaneous movement of the body towards the stimulus. The reflex action is generated as a response in the neural pathway called reflex arcs that includes the meninges of the brain, brain stem, spinal cord and vertebral column that sends electrical impulses to the muscles, and other parts of the body to give response towards stimulus.
What is one advantage of
convex mirrors for this use?
Answer:
It always gives a virtual, erect and a diminished image.
Hope this helps someone!!!
hey please help
is a solar eclipse local or global?
is a lunar eclipse local of global?
Answer:
A solar eclipse is Local
A lunar eclipse is global
Explanation:
which of these is is the greatest density silver copper aluminium or gold
Answer:
Gold.
Explanation:
Gold has a density of 19.32 grams per cubic centimeter, while the others have between 2 and 11. Hope this helps!
plzzz help :)) ecology
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:D
Explanation:
Each up-and-down column of elements on the periodic table.
A.Periodic Law
B.Group
C.Period
D.color of the chemical
Answer:
Groups are the vertical columns
Explanation:
Periodic law states that when elements are listed in order of their atomic masses they automatically fall into similar groups.
A period is the horizontal organization.
Answer D is irrelevant.
So the answer is B! Group!
Hope this helped!!!!