Answer:
A keystone species is a species that has an unusually large effect on its ecosystem.
Explanation:
hope this help
Answer:
large
Explanation:
it's a keystone species because it's unusually important in its ecosystem, it plays a big part.
the word keystone is used because it has to do with something being dependent on it
Evidence for evolution reveals that closely related organisms have many ___________ characteristics.
A. different
B. shared
C. modified
D. ancient
Answer:
B. shared
Explanation:
Closely related organisms have shared characteristics. They have shared characteristics because they're related. It cannot be different because they're related. It also cannot be modified or ancient characteristics as both of them wouldn't make sense. Modified characteristics? Ancient characteristics?–– just no.
Answer:
★ Evidence for evolution reveals that closely related organisms have many shared characteristics.
Explanation:
Hope you have a great day :-)
From the time of the ancient Romans, through the Middle Ages, and until the late nineteenth century, it was generally accepted that some life forms arose spontaneously from non-living matter. Such "spontaneous generation" appeared to occur primarily in decaying matter. For example, a seventeenth century recipe for the spontaneous production of mice required placing sweaty underwear and wheat in an open-mouthed jar, then waiting for about 21 days, during which time it was alleged that the sweat from the underwear would penetrate the husks of wheat, creating mice.
Experiment #4:
The first serious attack on the idea of spontaneous generation was made in 1668 by Francesco Redi, an Italian physician and poet. At that time, it was widely held that maggots arose spontaneously in rotting meat. Redi believed that maggots developed from eggs laid by flies.
Place yourself in the role of Francesco Redi. Design an experiment that will test this idea. Remember, you are challenging an idea that has been accepted for hundreds of years! You must follow the scientific method closely, account for all variables, and carefully document your procedure to have a chance at disproving this
theory!
#14. state a hypothesis. remember to include the variable you are testing and a prediction of the effects of this variable.
#15. write a step by step procedure for this experiment. include an experimental group and a control group. remember that every variable should be held constant between your two groups except the one your testing. this even includes exposure to air.
Which statement correctly explains the relationship between the genes of offspring and the genes of their parents?
A. Genes are located on chromosomes and are passed from parent to offspring.
B. Genes are located on chromosomes and are passed from offspring to parents.
C. Chromosomes are located on genes and are passed from parent to offspring.
D. Chromosomes are located on genes and are passed from offspring to parent.
Answer:
a
Explanation:
A. Genes are located on chromosomes and are passed from parent to offspring.
Scenario: Before the industrial revolution in England the predominant peppered moth had light colored
wings. After the industrial revolution more dark colored moths appeared until they were the dominant form of
the moth. The major predators of these moths were sparrows that relied on sight to identify and eat the
moths.
The light colored peppered moths in the forest of the industrial area began to disappear in numbers because
they were...
A Very sensitive to the sooty air pollution
B Poisoned from eating the soot covered lichens
C More visible against the dark tree bark
D Repelled by the dark bark tree since the lichens had died.
hi i uh- lied about my age on here but here's the question
Which of these factors are biotic? (Select all that apply.)
water
minerals
plants
light
animals
Answer:
plants and animals are biotic
Explanation:
biotic factors include living things while abiotic include light, nutrient enrichment, and non-living things. Hope it helps :)))
Answer:
I'm quite sure it's plants and animals!
Explanation:
The term "biotic" applies to things that are alive, and that includes plants and animals alike. From when we were taught that, I honestly feel that water could be an additional answer to this (all of the bacteria that lives within it), but I would settle with plants and animals the most. I hope this helped at least a little bit!
Why does DNA replication occur?
Answer:
So that each cell has all of the information.
Explanation:
Please brainliest!
Answer:
DNA replication needs to occur because existing cells divide to produce new cells. Each cell needs a full instruction manual to operate properly. So the DNA needs to be copied before cell division so that each new cell receives a full set of instructions!
SOMEONE PLEASE HELP ME WITH THIS I WANT TO PASS THIS TEST !!!
Answer:
I would say D
Explanation:
Because it looks the most correct out of them all
Answer:
Presence or absence of a cell wall and chloroplasts.
Explanation:
It's D.
bisphosphoglyceric acid (bpg) is a byproduct of glycolysis released into the bloodstream when an animal's supply of oxygen is low. like protons, it decreases hemoglobin's affinity for o2. the effect of high bpg levels would be that:
When an animal's oxygen supply is limited, bisphospoglyceric acid increases the oxygen level by acclamitization.
Acclimatization is the term used to describe the advantageous physiological changes brought on by frequent exposure to a hot climate. Increased sweating effectiveness is one of these physiological modifications. It is converted into a molecule identical to that of 2,3-bisphosphoglyceric acid (2,3BPG). A mechanism called 2,3BPG is employed to control the effective emission of oxygen from haemoglobin. As one of the processes of acclimatization, 1,3-BPG levels will rise in a patient's blood when concentration is low. Low oxygen levels increase 1,3BPG levels, which in turn increase 2,3BPG levels and change how well oxygen separates from hemoglobin.
Learn more about Bisphospoglyceric acid
https://brainly.com/question/8885734
#SPJ4
A. Crossing over decreases genetic diversity
B. During crossing-over, bits and pieces of the homologous chromosomes are exchanged
C. Homologous chromosomes move to opposite ends of dividing cells
D. The DNA of the diploid cell is copied
Answer: i beileve it is c ^^
Explanation:
What events occur during meiosis I and meiosis II?
Answer:
Homologous pairs of cells are present in meiosis I and separate into chromosomes before meiosis II. In meiosis II, these chromosomes are further separated into sister chromatids. Meiosis I includes crossing over or recombination of genetic material between chromosome pairs, while meiosis II does not.
Explanation:
Brainliest please?
The events for each type of meiosis are:
Meiosis I:
Prophase IMetaphase IAnaphase ITelophase IMeiosis II:
Prophase IIMetaphase IIAnaphase IITelophase IIWhat events occur during meiosis I and meiosis II?During meiosis, a specialized type of cell division that occurs in sexually reproducing organisms, two rounds of division take place: meiosis I and meiosis II. Here are the events that occur during each phase:
Meiosis I:
Prophase I: Chromosomes condense and pair up, forming homologous pairs. Crossing over, the exchange of genetic material between homologous chromosomes, occurs. The nuclear envelope begins to break down.
Metaphase I: Homologous chromosome pairs align at the center of the cell, called the metaphase plate, by attaching to spindle fibers.
Anaphase I: Homologous chromosomes separate and move to opposite poles of the cell, pulled by the spindle fibers.
Telophase I: Chromosomes reach the opposite poles, and the nuclear envelope reforms. Cytokinesis, the division of the cytoplasm, may occur, resulting in two haploid cells.
Meiosis II:
Prophase II: Chromosomes condense again, and the nuclear envelope breaks down. Spindle fibers begin to form.
Metaphase II: Chromosomes line up individually along the metaphase plate.
Anaphase II: Sister chromatids separate and move to opposite poles of the cell.
Telophase II: Chromosomes reach the opposite poles, and a new nuclear envelope forms around each set of chromosomes. Cytokinesis occurs, resulting in the formation of four haploid cells.
Overall, meiosis I reduces the chromosome number from diploid (two sets of chromosomes) to haploid (one set of chromosomes), while meiosis II separates sister chromatids to generate four genetically unique haploid cells, known as gametes. These gametes are ready for fertilization and contribute to genetic diversity in sexually reproducing organisms.
Learn more about meiosis at.
https://brainly.com/question/25995456
#SPJ6
Can someone please help!? I am struggling
Clarify the concept of development.
Answer:
There is nothing to look at or answer.
8. Which are indirect evidence of plate tectonics?
Earthquakes
Volcanoes
Mountains
All of the above
None of the above
How is smoke carried high into the atmosphere for transporting by wind
⚠️⚠️ i am getting closer to finishing ⚠️⚠️
Salt water is a
A. Compound
B. Element
C. Heterogenous
D. Homogenous
Answer: The correct answer is A. Hope this helps!
put the following steps of the scientific method in order (from left to right) that should be followed to identify the virus that is causing this disease. view available hint(s)
To order the steps in the order that could be used to find out a virus;
Observe a natural phenomenon or reaction Devise an explanation of what you have observed Experiment to support or refute your explanation Record the results of your experimentsDetermine whether your results support or refute your explanationDecide whether you need to rewrite your explanation on it has withstood testing.What is an experiment?In science, experiment is the manner by which we are able to establish a cause and effect relationship. It is common in science to carry out an experiment in order to find out the cause of particular effect.
We now have to order the steps in the order that could be used to find out a virus;
Observe a natural phenomenon or reaction Devise an explanation of what you have observed Experiment to support or refute your explanation Record the results of your experimentsDetermine whether your results support or refute your explanationDecide whether you need to rewrite your explanation on it has withstood testing.Learn more about experiment:https://brainly.com/question/11256472
#SPJ1
could someone help me?
Answer:
Protein
Explanation:
My thought process is enzymes do all the work but they are made out of proteins (most of the time) so.... thats why i would assume it is protein.
What's the answer for this? Please answer as soon as possible!!! Thank you❤️❤️❤️
Answer: See explanation
Explanation:
Double circulation is when for every circuit, blood circulates twice through the human heart.
Firstly, deoxygenated blood is sent by the right pump m to the lungs. After it then becomes oxygenated, it will then be taken back to the heart and them the oxygenated blood will then be carried round bmthe body by the left pump.
In the figure, polygon ABCD is transformed to create polygon A'8CD. This transformation is a by a factor of.
sorry ur figure is not opening at all
A scientist observes the ocean tides moving large amounts of sand away from the beach. This is evidence for which type of natural process?
Physical weathering
Chemical Weathering
Erosion
Deposition
Answer:
C erosion
Explanation:
its taking away part of the beach, and it happens slowly over time
Answer:
c
Explanation:
PLZ HELP .what are 3 pieces of evidence that abiogenesis is responsible for the origin of life?
Aquatic Food Web
Phytoplankton
shrimp
Seaweed
Sea Lice
Crab
Lobster
Fish
Seagull
What role do they all play in the food web?
Who eats whom in an ecological community is described by food webs. Food webs, which are composed of interconnected food chains, help us comprehend how changes to ecosystems—such as eliminating a top predator or introducing nutrients—affect numerous species both directly and indirectly.
The foundation of aquatic food webs is made up of phytoplankton and algae. Primary consumers like zooplankton, small fish, and crustaceans consume them. In turn, fish, small sharks, corals, and baleen whales consume the primary consumers. Large sharks, billfish, dolphins, toothed whales, and large seals are some of the top ocean predators. All aquatic life in this food chain is consumed by humans.
To learn more about Food webs here:-
https://brainly.com/question/2233704?referrer=searchResults
#SPJ9
Altered mental status, which often accompanies a diabetic emergency, can easily be confused with what??
1.a migraine
2.alcohol intoxication
3.a severed spinal cord
4.a swollen or deformed lower extremity
Answer:
I would go with number 1 or number 2
Answer:
a migraine
Explanation:
two separate populations of organisms are fighting over available food in a given area. What principle does this demonstrate?
A. competition
B. variation
C. adaptations
D. natural selection
pleaseee helppp
which of these factors is associated with sustainable faming
A. monoculture
B. food security
C. desertification
D. intensive farming
Answer:
B. food security
Explanation:
Answer:
B-Food Security
Explanation:
what are 3 positive things human do that impact the environment ?
Answer:
Ways in which people positively affect ecosystems around the world include: Recycling. Establishing wildlife preserves and parks. Creating green, open space laws.
Explanation:
:D
How does the size of the fetal face relate to the cranium? how does this compare to the adult skull?.
The face is foreshortened and it is overshadowed by the large cranium. While the mandible and maxillae are very tiny.
Cranium is the outer layer that protects the skull. It consists of three parts: the frontal bone, occipital bone, and two parietal bones.
The frontal bone is a single bone that transforms into a forehead and it is positioned atop the eyes' orbit.
The frontal bone also forms both sides of the upper jawbone or maxilla. While the two parietal bones form the top and side of the human skull.
They also take part in forming the largest part of the upper jawbone like the frontal bone.
If you need to learn more about cranium, click here:
https://brainly.com/question/26652156
#SPJ4
1. Defining the Issues In your own words, explain
the threat caused by overuse of antibiotics.
Answer:
Creation of Anti-Biotic Resistant Bacteria
Explanation:
When using antibiotics to kill simple bacteria which can be killed with either soap or if within the body through a fever this increases its resitatance to anti-biotics so the next time it emerges it will need a stronger antibiotic. This can actually make most harmless types of bacteria very resitant to medication and could easily become soemthing we no longer have anything strong enough to kill.
Careers in Science, Technology, and Engineering: Mastery Test
Why did you post this with really no question?
With incomplete dominance, a likely ratio resulting from a monohybrid cross would be ________.
Answer:
1:2:1 ratio
Explanation:
A cross of two F1 hybrids, heterozygous for a single trait that displays incomplete dominance is predicted to give a 1:2:1 ratio among both the genotypes and phenotypes of the offspring.
What two things of elements organizes elements based on their properties?
The elements are organizes based on their property like metals and non metals and grouping the valence electrons.
When you go down the on the group , the number of electrons increases down group As a result Atomic number also increases therefore the element having higher valence elections are present at the bottom and the the element having low valence electrons are at the top.The elements having large valence electrons have higher size and elements having low valence electron have low size.The periodic table divides into metals , non metals, and metalloids.The metals have ability to lose their electrons to formed the bond with other compound.The non- metal elements share their electrons to form covalent bond with other elements to formed the compound.The metalloid can behave as both metal and non metal.So from above observation we can divides the elements on the basis of metal and non- metal and number of valence electrons.
Learn more about periodic table here
https://brainly.com/question/14514242
#SPJ9