Answer:
How Biogeography Affects Biodiversity
Alfred Russel Wallace, Father of Biogeography
Figure 1: Alfred Russel Wallace, Father of Biogeography
Some places contain more species than others. For example, Antarctica has fewer species than a temperate deciduous forest, which in turn has fewer species a tropical rainforest. For over 150 years, researchers have sought to make sense of the gross and fine scale spatial patterns in biodiversity, and to elucidate both the proximate and ultimate causes for these patterns.
This article describes some of the major geographic patterns in species richness, and the processes and theories that are thought to account for these patterns. Much of this knowledge has emerged from the tremendous body of work from one scientist, Alfred Russel Wallace (Figure 1), widely regarded as the “Father of Biogeography.” Aside from co-originating the process of Natural Selection with Charles Darwin, Wallace spent extended periods studying the distribution and diversity of plants and animals in Amazonia and Southeast Asia in the mid 1800s. Many of the patterns and processes featured in this article were initially described by Wallace, and careful study of his work indicates that his ideas presaged many of the discoveries made by his numerous successors.
Many of the spatial patterns in biodiversity are overt, others are subtle and yet additional patterns remain undetected. While the existence of these patterns may be obvious — and changes in the environment that are paired with these patterns may also be obvious — the mechanisms that cause the differences in biodiversity along environmental gradients are under still the subject of scientific debate. Because large-scale patterns are the emergent result of complex interactions at many spatial and temporal scales, no single answer is likely to ever emerge, but with continued research our understanding of the processes shaping these patterns increases.
Historical Processes Affecting Biogeography
Darwin's finches of the Galapagos Islands are a classic example of adaptive radiation.
Figure 2: Darwin's finches of the Galapagos Islands are a classic example of adaptive radiation.
All species occurring in at a given place and time either arrived from another place or originated in that location from ancestral species. This fact applies to extinct species that were ancestors of all extant species. Species richness in a given location is the result of three factors — the rate of speciation, the rate of extinction, and the dispersal of species from other locations. In principle, if biogeographers could understand how the current and past environment has shaped these three factors, we would then obtain a comprehensive understanding of what generates all biogeographic patterns of species richness. However, numerous environmental and organismal parameters can drive these historical factors, in both complex and interacting fashions.
what is the role of the enzyme aromatase in sexual differentiation in reptiles?
Answer:
Aromatase helps to convert sex steroids, a group of hormones that influence sex development and reproduction, from male sex hormones (androgens) to female sex hormones (estrogens)
Explanation:
hope it helps you
the contractile organelle of skeletal muscle fibers is
Answer:
The myofibrils are the contractile organelles in the muscle fibers.
why are the offspring of asexually reproducing organisms genetically identical to their parent?
Answer: Because thear is only one parent.
hans and zacharias janssen contribution to cell theory
Answer:
1590’s
What year did Hans and Zacharias Janssen contribute to the cell theory? Hans and Zacharias Janssen are known for inventing the compound optical microscope. They made it in the 1590’s. This contributed to “The Cell Theory” by making it easier and more practical whilst observing cells.
Explanation:
Cell theory states that all biological organisms are made up of cells, which is the structural and functional unit of life.
Scientists Hans and Zacharias Janssen invented the compound microscope that played a vital role in observing cellular functions.
Hans and Zacharias Jansen invented the compound microscope, which consisted of the eyepiece and an objective lens.
The scientists discovered the compound microscope in the late 16th century, which then helped many scientists to magnify and observe the microscopic structures.
Thus, the Janssens discovered the compound microscope.
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Which RNA nucleotide is complementary to thymine?
adenine
uracil
guanine
cytosine
Answer:
uracil
Explanation:
uracil ofc ig yuh
Please heeelp. :(
I don't understand anything about this topic, its urgently.
During the time of pandemic how Embroidery helps you become productive as a member of the family?
Answer:
It helps deal with stress, taking your mind on the task at hand. Trying something new can be fun and even productive around the house.
Unicellular organisms have different structures from each other.Explain why.
Answer:
The reason why is because in the process of reproduction; there are some mistakes in DNA replication (out of billions of base pairs about 120,000 mistakes). This is what brings us so much variation in organisms.
Which type of ATP production requires oxygen?
Answer:
Cellular respiration
Answer:
Cellular respiration
Explanation:
because it needs it to release energy from food for use by cells.
Why are chromosomes arranged in homologous pairs in meiosis
Answer:
They allow for the recombination and random segregation of genetic material from the mother and father into new cells.
Explanation:
Guys please help me this is my second time asking the same thinggg pls
How are coastal ecosystems a major source of oxygen for the rest of Earths waters?
Answer:
The ocean produces oxygen through the plants (phytoplankton, kelp, and algal plankton) that live in it.
Explanation:
These plants produce oxygen as a byproduct of photosynthesis, a process which converts carbon dioxide and sunlight into sugars the organism can use for energy. (hope this helps <3)
Why are bacteria called the borderline between plants and animals
Answer:
it's because they have the both characteristics of plants and animals
example:-
bacteria have cell wall that is a characteristic of the plants.but at the same case they also produce some nucleic acids that are only found in animals.so, they are the borderline between plants and animals.
Explanation:
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please help me nowwwwwwwwww it is not D
Which of the following best describes sickle-cell anemia?
A) Caused by environmental factors that an individual was exposed to during pregnancy.
B) A hereditary genetic mutation that causes a resistance to malaria.
C) An inherited disorder that increases the risk of contracting malaria from mosquitos.
D) A genetic mutation that is inherited from a dominant allele of one parent.
Answer:
A.
Explanation:
This is when a female reproduces alone
Answer:
Sickle cell anemia is one of a group of disorders known as sickle cell disease. Sickle cell anemia is an inherited red blood cell disorder in which there aren't enough healthy red blood cells to carry oxygen throughout your body. Normally, the flexible, round red blood cells move easily through blood vessels.
Explanation:
Based on "Sickle cell anemia is an inherited red blood cell disorder" taken from the text, I would say the correct answer is C, because it says "an inherited disorder" and describes Sickle cell anemia.
Hope this helps! :D
Someone help and plz make sure it’s right :) will mark brainiest
Answer:
total # of species
Explanation:
species richness is a number of different species represented in the ecological community landscape or region.
Answer: Species richness is the number of different species represented in an ecological community, landscape or region.
PLS HELP WILL MARK BRAINLYIEST What is a rule for making a positive atom which has positive charge?
Answer:
the octect rule
Explanation:
Explanation:
If there are more protons than electrons, then the element is a positive ion. If there are more electrons than protons, then the element is a negative ion.
model of a cell cycle
The cell cycle, or cell-division cycle, is the series of events that take place in a cell that cause it to divide into two daughter cells.
this is your answer
hello, i need help with this :]
Answer:both would be an unshaded square
Explanation:because if they both have the same thing and it doesn’t say either are shaded then they aren’t shaded
11. In the carbon-fixing stage, ATP and NADPH are used to convert CO2 into?
12. What is another name for the Calvin Cycle and why?
Explanation:
G3P
This process is called carbon fixation, because CO2 is “fixed” from its inorganic form into organic molecules. ATP and NADPH, which were made during the light dependent reactions, use their stored energy to convert carbon dioxide into a three-carbon compound called G3P.
Answer:
11. This process is called carbon fixation, because CO2 is “fixed” from its inorganic form into organic molecules. ATP and NADPH, which were made during the light dependent reactions, use their stored energy to convert carbon dioxide into a three-carbon compound called G3P.
12. The Calvin cycle is another name for the light-independent reactions. This is a biosynthetic multi-step reaction that fixes carbon dioxide to ribulose.
16. Which of the following stimuli would cause the liver to produce more glycogen?
Some people say it’s B or C, which one is correct?
which statement is true regarding the agricultural production of genetically modified organisms
Explanation:
GMO stands for genetically modified organisms. The DNA of these organisms have been genetically altered through the techniques of genetic engineering which makes the organism better than its wild variety. These genetically altered organisms are also known as transgenic as they consist.
Genetically modified organism are in widespread use nowadays. But some reports shows that they might causes some health risks and may even lead to cancer. Thus, option D is correct.
What is genetically modified organisms?Genetically modified organism or GMOs are plants or animals with recreated or specially designed genes. The genetic modification is carrying for acquiring desirable characteristics and flourishment in growth.
Genetically modified crops will grow easily with inserted properties and characteristics. However they contains certain toxins that will effects human beings.
Health issues such as reproductive disorders, hepatic and pancreatic disorders, allergic reactions and even cancer. Therefore, genetically modified organism creates problems rather than their benefits.
Hence, option D that is, GMOs may be hazardous to human health in ways that we cannot yet understand is correct.
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your question is incomplete and your complete question probably was:
Which of the following are true regarding genetically modified organisms?
a) Widespread use of GMOs may promote a loss of biodiversity.
b) No scientific evidence has been found that GMOs pose any special risks to humans or the environment.
c) GM plants make up a significant part of our food supply.
d) GMOs may be hazardous to human health in ways that we cannot yet understand.
e) GMOs can be more nutritious than standard crops.
Organs such as the heart serve e function of working together as components of-
Answer:
the circulatory system
Explanation:
for instance your heart, your lungs,your blood, and your blood vessels all work together as a team.
what is the life cycle of a liverhook
Answer:
Image result for what is the life cycle of a liverhook
Following ingestion, the young flukes migrate to the liver, through which they tunnel, causing considerable tissue damage. The infection is patent about 10-12 weeks after the metacercariae are ingested. The whole cycle takes 18-20 weeks.
Explanation:
in a typical animal, mitosis produces _________, while meiosis produces____________.
In a typical animal, mitosis produces two identical daughter cells, while meiosis produces four unique daughter cells.
Meiosis is a type of cell division that involves the parent chromosome being halved and then divided again to form four unique daughter cells which have only one copy of chromosome from the parent.
This process occurs in sex cells such as the sperm and egg cells.
Mitosis is also a type of cell division but occurs with the parent cells to form two identical daughter cells.
This type of cell division have produces the same number of chromosomes the parents have and occurs in cells of the body which undergoes growth or during replacement of worn-out tissues.
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Entre las personas , la practica de estilos de vida denominados saludables ¿que consecuencias tiene sobre su metabolismo?
Answer:
El estilo de vida es una expresión utilizada para describir la forma en que se entiende o se percibe la vida. Este concepto no tan filosófico, sino más bien al estilo característico en que desarrolla de vida. Estos aspectos abarcan, relaciones personales, del consumo, y la forma de vestir. Ademas de ello, en la descripción de las actitudes, aptitudes, y preferencias que refleja un individuo en la sociedad.
Por su parte, se puede decir que el metabolismo es el conjunto de reacciones químicas a partir de los alimento, las cuales se desarrollan en el cuerpo con la finalidad de producir energía necesaria para el desarrollo del ser vivo.
Con todo esto, se puede decir que el estilo de vida, específicamente el consumo de alimentos pueden afectar de manera importante el metabolismo en un sentido que de acuerdo a las características de los productos que se consuman, las reacciones químicas generadas pueden variar.
Asimismo, dichos factores pueden ser de riesgo o generadores de bienestar, ya que alteran de manera directa el proceso dinámico de degradación de alimentos.
Explanation:
Wha is biology and how it started and what kind of biology is this
Answer:
Basically biology traces the study of the living world from ancient to modern times. Although the concept of biology as a single coherent field arose in the 19th century, the biological sciences emerged from traditions of medicine and natural history reaching back to Ayurveda, ancient Egyptian medicine, and the works of Aristotle and Galen in the ancient Greco-Roman world. This ancient work was further developed in the Middle Ages by Muslim physicians and scholars such as Avicenna. During the European Renaissance and early modern period, biological thought was revolutionized in Europe by a renewed interest in empiricism and the discovery of many novel organisms
Explanation:
Answer:
Basically biology traces the study of the living world from ancient to modern times. Although the concept of biology as a single coherent field arose in the 19th century, the biological sciences emerged from traditions of medicine and natural history reaching back to Ayurveda, ancient Egyptian medicine, and the works of Aristotle and Galen in the ancient Greco-Roman world. This ancient work was further developed in the Middle Ages by Muslim physicians and scholars such as Avicenna. During the European Renaissance and early modern period, biological thought was revolutionized in Europe by a renewed interest in empiricism and the discovery of many novel organisms
quién me ayudaría a hacer este crusigrama
gracias
Answer:
Respuesta: hola ami me parece que ya lo hiciste pero te dejo ejemplos:
Explicación: 1.Venezuela
2. Sanclemente
3. Marroquin
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Explanation:
describe the appearance of the vacuole in a well watered plant
Answer:
Describe the appearance of the vacuole in a well-watered plant. What effect would this have on the cell wall of the plant? The vacuole would expand and take up most of the space inside the cell. This would create internal pressure on the cell wall.
Explanation:
Ellie loves to canoe out at Sebago Lake. One summer day she went out on the water and gave her dad a call
on her cell phone to let him know she was okay. Although she was comfortable out on the water, her dad,
back on land, was suffering tremendously from the heat. Explain why Janet felt cooler than her dad, even
though they were within a mile of each other.
List two characteristics of Coelenterata and Nematoda each.
Answer:
What are the two characteristics of Coelenterata?
Characteristics. All coelenterates are aquatic, mostly marine. The bodyform is radially symmetrical, diploblastic and does not have a coelom. The body has a single opening, the hypostome, surrounded by sensory tentacles equipped with either nematocysts or colloblasts to capture mostly planktonic prey.
What are the two characteristics of Nematoda?
Their body is bilaterally symmetrical and triploblastic. They are cylindrical in shape. They exhibit tissue level organization. Their body has a cavity or pseudocoelom.
Explanation:
how does oxygen have a direct effect on sea urchins
Answer:
When the oxygen level is low in a Purple Sea Urchin, muscles associated with Aristotle's Lantern pump fluid through its body (through the canals). Carbon dioxide (waste/not good stuff) is released through the anus. The Purple Sea Urchin obtains oxygen through diffusion only (the diffusion of oxygen into the organism).
Explanation:
Brainliest please
Sea urchins breathe through their feet tubes because of nonavailability of lungs and gills in them. When the oxygen level is low at that time, the sea urchins pump fluids through their anus.
How are sea urchins able to survive sea ?Sea urchins are able to survive in sea because of the tiny hair called spines present on their body as water currents are created because of the hair and waste gets washed away with the water currents created.
When the carbon dioxide level gets increased in the sea at that time the skeletal structures of the marine animals are also affected.
The shells made up of calcium also gets affected because of the increasing acidity in the water. Carbon dioxide not so good is released through the anus and this totally affects the normal regulation of the creature.
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