Pangaea was a supercontinent. This enormous continent was consisted of all continental masses on Earth that merged together in the late Paleozoic era, around 335 million years ago. Pangaea lasted until the early Mesozoic era, breaking apart roughly around 175 million years ago. From the breaking apart of this supercontinent there were two large masses that formed, Laurasia on the north, and Gondwanaland on the south. As these two remnants of Pangaea continued to break apart, the modern day continents started to form and slowly started to give the planet the appearance that we see in the present.
Which of the following is an example of microevolution?
Answer:
A population of birds slowly changes feather color from red to blue.
Explanation:
Hope this helps!
Acid rain caused by industrial pollution greatly reduces the number of trees in a forested region that is home to a particular species of bird. How might this decrease in the number of trees most likely affect this bird population
a.) The population will adapt to ground dwelling.
b.) The population will increase as predators move out of the region.
c.) The population will decrease due to lack of resources.
d.) The population will stabilized when it moves to another region.
Answer:
c. The population will decrease due to lack of resources
The decrease in the number of trees most likely to affect this bird population. The effect caused is the population will decrease due to lack of resources. The correct option is c.
What is acid rain?The Acid rain Is a form of precipitation which has acidic components like sulfuric or nitric acid. This falls on the ground from the atmosphere in wet or dry forms which includes rain, snow, fog, hail, acidic in nature.
The acidic rain would decrease the number of trees. In return, the birds or animals whose habitat is the large trees and plants, may not survive there. These animals or birds will change their habitat in order to fulfil their survival needs.
Thus, population will decrease due to lack of resources. The correct option is c.
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Some Individuals produce more offspring than others. Which term describes this observation?
The answer is A. Differential reproduction.
Answer:
The correct answer is differential reproduction
Explanation:
The different individual in a population tends to produce a different number of offspring and this difference in reproduction among them is called differential reproduction. This differential reproduction is responsible for producing more offsprings by some individuals.
Nature allows those individuals who are better suited in their environment to survive up to reproduction age and produce offspring and many of those individuals who are less adapted do not reach to reproduction age thereby produce less offspring.
igneous rocks are classified based upon their:
Answer:
Composition and texture. Hope this helps.
Explanation:
Answer:
texture and mineralogy
Explanation:
How is Uranus similar to Jupiter?
it has rings
It has no moons.
It has a rocky surface.
It has methane in its atmosphere.
Answer:
They both have Rings, and are Gaseous.
which of the following choices contains a nucleus?
a. bacteria
b. eukaryotes
c. prokaryotes
Answer:
b. eukaryotes
Explanation:
Eukaryotic cells have a true nucleus, which means the cell’s DNA is surrounded by a membrane. Therefore, the nucleus houses the cell’s DNA and directs the synthesis of proteins and ribosomes, the cellular organelles responsible for protein synthesis.
Eukaryotes are the group of organisms that contain a nucleus in their cells. Unlike prokaryotes (which include bacteria), eukaryotic cells are defined by the presence of a nucleus and other membrane-bound organelles.
Explanation:The organism that contains a nucleus among the given options is the eukaryotes. To explain further, living organisms can be divided into two broad categories: eukaryotes and prokaryotes. Eukaryotes are organisms whose cells contain a nucleus and other organelles enclosed within membranes. Examples of eukaryotes are fungi, plants, and animals. Meanwhile, bacteria and prokaryotes do not have a nucleus. Prokaryotes are unicellular organisms that lack organelles or other internal membrane-bound structures, including a nucleus.
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Mark sits on a swing that is 2.5 feet off the ground. Swinging as hard as he can, the swing reaches a height of 6 feet.
Assuming Mark holds a steady pace, the height of the swing could be represented by a cosine curve.
If Mark makes a full swing forward and backward in 3 seconds, which graph below could represent the height of the swing, in
feet, for any time, t?
O
Answer:
The answer is image A
Explanation:
which kingdom does this organism belong to
The five-kingdom system of classification for living organisms, including the prokaryotic Monera and the eukaryotic Protista, Fungi, Plantae and Animalia is complicated by the discovery of archaebacteria.
Answer Protista
Explanation: srry if am wrong
which organelle conatins chemicals that break down substances in the cell?
a. lysosomems
b. vesicles
c. Mitochondria
d. nucleus
please help for tommoroq
Answer:
Lysosomems that break down substances in the cell. - a.
What is intelligence
Answer:
The cognitive abilities of an individual to learn from experience, to reason well, and to cope effectively with the demands of daily living
Explanation:
Intelligence is something that can actually be measured, even though it is not a physical, but a psychological trait. The humans had wanted to be able to measure their intelligence for quite some time, but that only became possible with the development of the modern psychology and the test specially created for this purpose. The intelligence represents the cognitive abilities of an individual to learn from experiences, how well can it reason, as well as to cope effectively with the demands of the daily living. To put it more simple, it is the ability of an individual to acquire and apply skills and knowledge in its life.
need help asap
11. Crossing over occurs
A)
in the
developing
zygote
in gametes
prior to
fertilization
during
prophase II
prior to
random
alignment in
metaphase
Answer:
It occur prior to randim assignment in metaphase.
When the solution concentration on the outside of a cell is greater than the solution concentrate on the inside of the cell, what type of solution is the cell within?
Answer:
Hypotonic solution
Explanation:
The solution with lower solute concentration is referred to as hypotonic solution while the other with higher solute concentration is called as hypertonic solution.
Since the solution concentration on inside of the cell is lower than that of solution present on the outside the cell; the solution inside the cell is hypotonic.
cid rain throughout the northeast United States has lowered the pH of many ponds and lakes. The lowered pH will eventually result in the death of many aquatic animals. The table shows the pH tolerance levels for water that supports a variety of nine animal species.
What is the mathematical range of the minimum pH levels that supports life for the nine species?
A) 2.5
B) 4.5
C) 5.5
D) 7
Answer:
The answer is A (2.5)
Explanation:
I looked the question up for you but since there is not a chart I can not give you an accurate explanation. Good luck !
Answer:
a
Explanation:
A gardener notices that some of her green plants are experiencing the
following changes during the middle of summer:
• Brown or yellow discoloration in the leaves
• Reduced leaf size
How will these changes most likely affect the plants?
A. The plants will make fewer nutrients because of chlorophyll loss.
B. The plants will increase the number of chloroplasts in their cells.
C. The plants will grow more roots in search of water.
D. The plants will decrease their reliance on the sun's energy.
Answer:
B. The plants will make fewer nutrients because of chlorophyll loss.
Explanation:
The surface of the leaf is lined with chloroplasts.
Since the leaf sizes have been reduced, chloroplasts have followed. Thus, there are less chlorophyll pigments, indicating less chances of photosynthesis, meaning fewer nutrients made.
Answer:
The correct answer is option A- the plants will make fewer nutrients because of chlorophyll loss.
Explanation:
Summer is experienced with high temperature and high intensity of light which shows effects on the plant.
Exposure to high temperature and high light intensity above threshold cause several physiological and morphological changes in the plants like affect the chlorophyll. Chlorophyll gets degraded by a process called " chlorosis" due to which brown and yellow patches start appearing on the leaves.
The chlorophyll loss leads to less production of glucose molecule as the sunlight is not captured by the chlorophyll, a pre-requisite condition of the photosynthesis.
Thus, option- A is the correct option.
Which is a major factor affecting population growth rate? (Site 1)
Final answer:
Birth rates versus death rates, immigration, and emigration are primary factors affecting population growth rate. Local site-level factors, including resource availability and demographic processes, also significantly impact population dynamics and can influence larger scale trends.
Explanation:
A major factor affecting population growth rate is the balance between birth rates and death rates, alongside immigration and emigration. If the birth rate exceeds the death rate, the population will grow, whereas the population will decrease if the reverse is true. When birth and death rates are equal, the population size remains stable. Additional factors influencing population size include resource availability, environmental conditions, such as droughts, and biotic factors like predation, parasitism, and competition.
The labor market and economic factors such as GDP can also reflect changes in population size. Populations are affected significantly by factors at the site level, encompassing local resources and demographic processes, which can in turn influence larger scale population dynamics.
1. Identify each structure below and describe its function(25 points)!!!
Answer:
A. Plasma membrane
B. Cell wall (present only in plants)
C. Cytoplasm
D. Vacoule (occuoy 80 to 90 % space in plant cell)
E. Nucleus
F. Chloroplast (in which photosynthetic occurs.. So found only in plants)
G. Centrioles (help in cell division, present only in animals)
H. Mitochindria
what type of fossils are a cast or mold in a rock?
A. cast fossils
B. mold fossils
C. impression fossils
D. impact fossils
C. Impression fossils.
It can be both a cast and/or mold fossil. It leaves an impression on the fossil. Hope I helped! :3
Answer: C
Impression fossils are when the bone's shape and texture is imprint on a rock. So, the answer is impression rocks. They are usually sedimentary type rocks.
HELPP PLZZZZ ASAP!!!!!
A.) what is the effect of livestock on the amount of methane gas
Determine the stability of each ecosystem
Ecosystem stability on the concepts of equilibrium, resistance, and resilience. These factors, along with biodiversity and disruptions to food chains and food webs, can influence whether an ecosystem remains stable or undergoes destructive or irreversible changes.
Explanation:The stability of an ecosystem can be determined using factors such as its equilibrium, resistance, and resilience. Equilibrium is the steady state of an ecosystem where all organisms are in balance with their environment and with each other. Resistance is the ability of an ecosystem to remain at equilibrium in spite of disturbances, and resilience is the speed at which an ecosystem recovers equilibrium after being disturbed.
When considering human impact, ecosystem resistance and resilience become especially important. Changes in these parameters can lead to changes in ecosystem structure and cause the ecosystem to lose its resilience entirely. This, in turn, can result in the complete destruction or irreversible altering of the ecosystem. Other factors that can affect ecosystem stability include biodiversity and disturbances whether they are internal or external.
Food Chains and Food Webs
Food chains and food webs model the flow of energy and materials between organisms within an ecosystem. Changes in the structure or dynamics of these food chains and webs can also impact the stability of the ecosystem.
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The stability of an ecosystem is determined by its resistance (ability to maintain equilibrium despite disturbances) and resilience (the speed of recovery after disturbances). Ecosystem dynamics study these changes. Biodiversity, food chains, and food webs are key factors in influencing an ecosystem's stability.
Explanation:The stability of an ecosystem is determined by its equilibrium, which is a dynamic state in which changes in species numbers and occurrences are balanced, thus maintaining a certain level of biodiversity. This balance, however, can be disturbed by both external and internal factors. The ecosystem's resistance, its ability to remain at equilibrium despite disturbances, and its resilience, the rate at which it recovers equilibrium after being disturbed, are especially important in measuring changes in ecosystems.
Major disturbances or alterations in the ecosystem could lead to a situation where it loses its resilience entirely, leading to either complete destruction or irreversible altering of the ecosystem. The study of these changes in ecosystem structure caused by environmental changes (disturbances) or by internal forces is called ecosystem dynamics.
Furthermore, the diversity of species within an ecosystem also influences its stability. The food chains and food webs are a part of the ecosystem that showcases the interaction between species and the transfer of energy from one species to another. This further affects the stability of an ecosystem.
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Which type of bacteria is shown in the image?
A. bacillus
B. coccus
C. spirillum
D. cholera
i need help now
Answer:
B. coccus
Explanation:
I took the test on usatestprep
and put the image next time
Final answer:
The term 'vibrio' is used to refer to a prokaryotic cell that is comma-shaped, distinguishing it from other bacterial shapes such as coccus (spherically shaped) and bacillus (rod-shaped).
Explanation:
In the context of bacterial shapes, when referring to a prokaryotic cell that is comma-shaped, the term that is used is vibrio. Bacteria are categorized into different shapes primarily based on their cellular morphology. For instance, coccus (pl. cocci) is a term for spherical-shaped cells, while bacillus (pl. bacilli) is used for rod-shaped cells. When bacteria present a curved rod shape, it indicates a vibrio, which are rods with a single curve, as opposed to spirillum or spirochetes that have multiple curves or a spiral shape. Therefore, the type of bacteria that is comma-shaped is called vibrio.
In plants, tubes transport nutrients throughout the plant.
In humans, which parts carry out that function?
A.
small intestines
B.
alveoli
C.
nerves
D.
blood vessels
Answer:
D. blood vessels
Explanation:
Blood vessels the answer
This is when a seed will be produced that can turn into a genetically identical plant. Question 3 options: Pollinating by the wind Self-pollination Pollinating by bees Cross fertilization
Answer:
Apoximis or asexual seed formation
Apoximis is when a seed will be produced that can turn into a genetically identical plant.
Explanation;
Asexual reproduction is the type of production that results to offspring or organisms that are genetically identical to the parent plant. In plants, plants can reproduce asexually through vegetative reproduction or apomixis, without fertilization of gametes.
Apomixis is where some plants can produce seeds without fertilization. This occurs when an ovule or part of the ovary gives rise to a new seed.
Need help on checking my answers! The ones circled in yellow are the ones that I believe the answers are. Please and thank you
Answer:
b) development
Explanation:
A tadpole turns into a frog over it's lifetime. this is called development
Which of the following adaptions will help a plant survive in the desert?
Stem that stores water
Shallow root system
Large surface area
Flat broad leaves
Answer:
Stem that stores water
Explanation:
What is point source pollution of an aquatic ecosystem
Answer: Point source pollution is water pollution that comes from a direct single source and can easily be traced. Some examples of point source pollution can be oil spills, sewage drainage pipes, unlined landfills
Point source pollution occurs when pollutants enter an aquatic ecosystem from a single identifiable location, such as sewage discharges, leading to problems like eutrophication and harm to aquatic life.
Explanation:Point source pollution of an aquatic ecosystem refers to contaminants entering the environment from a single, identifiable source. Examples include discharges from wastewater treatment plants, factories, and combined sewers. During heavy rain, combined sewer systems may overflow, leading to direct spilling of untreated sewage into water bodies.
Eutrophication is another consequence of point source pollution, wherein excessive nutrients, such as nitrates and phosphates from waste, promote overgrowth of algae and bacteria. This leads to oxygen depletion in the water, adversely affecting fish and other aquatic life. Ocean acidification is a separate issue where excess CO2 in the atmosphere causes oceans to become acidic, which can harm corals and shellfish. In addition to chemicals, physical debris can also be a point source of pollution, posing dangers to aquatic wildlife.
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what is the 6 characteristics of animals
Animals are multicellular.
Animals are heterotrophic, obtaining their energy by consuming energy-releasing food substances.
Animals typically reproduce sexually.
Animals are made up of cells that do not have cell walls.
Animals are capable of motion in some stage of their lives.
Animals are able to respond quickly to external stimuli as a result of nerve cells, muscle or contractile tissue, or both.
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Animals are multicellular organisms that exhibits certain characteristics. The organisms that belong to the kingdom Animalia and have eukaryotic multicellular cells. They have DNA as their genome. As they lack chlorophyll, these are included under heterotrophic organisms.
What are heterotrophic organisms?The organisms that cannot make their own food and are dependent on plants for the same directly or indirectly.
The animals have the following characteristics:
All animals require nutrition.They perform respiration.They exhibit movement.They have certain growth.They exhibit reproduction that involves the fusion of gametes.Animals are sensitive to the stimulus.Thus, these are the 6 characteristics of animals.
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What cycle do the light-independent reactions use to turn carbon dioxide into glucose?
A. Calvin cycle
B. Krebs cycle
C. Electron transport cycle
D. Glycolytic cycle
The answer is a the Calvin cycle
Calvin cycle is used by light-independent reactions to turn carbon dioxide into glucose. Therefore, option A is correct.
The Calvin cycle is also known as the Calvin-Benson cycle or the dark reaction. It is a series of biochemical reactions that occur in the stroma of chloroplasts during photosynthesis.
The primary function of the Calvin cycle is to convert carbon dioxide (CO2) from the atmosphere into glucose and other organic compounds. It is the second stage of photosynthesis, following the light-dependent reactions that occur in the thylakoid membranes.
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sediments deposited in layers eventually form what kind of rock.
Answer:
Sedimentary rocks
Explanation:
Answer: Sedimentary Rock
what is an autotroph and what is a heterotroph
Autographs are organisms that make their own food/energy. The only example I can think of (and the only one I think exists) is plants. They make glucose from the sun and other stuff
Heterotrophs are organisms that needs to get its energy from other sources. You and me are heterotrophs (well unless you are a plant lol). We have to eat food to get energy to survive.
Hope this helped!!!
Answer:
An autotroph is an organism that is able to form nutritional organic substances from simple inorganic substances
An heterotroph is an organism deriving its nutritional requirements from complex organic substances.
Explanation:
What type of reasoning is used in this example?
The air is dry in deserts.
The Sahara is a desert.
The Gobi is a desert. The Mohave is a desert.
The air is dry in the Sahara, the Gobi, and the Mohave.
A:Inductive reasoning. B:Deductive reasoning
The reasoning used is inductive reasoning.
Explanation:The type of reasoning where the examples are used to derive conclusion it is called as inductive reasoning. The end is the theory or plausible. This implies the end is the piece of thinking that inductive thinking is attempting to demonstrate. Inductive thinking is likewise alluded to as 'circumstances and logical results thinking' or 'base up thinking' since it looks to demonstrate an end first. This is normally gotten from explicit occasions to build up a general end.
As the given examples quotes many examples of desert and then derives conclusion out of it, this is considered as example of inductive reasoning.