Answers
Answer:
population is decreasing
Explanation:
Related Questions
PLSS HELP ME WITH THIS IMMEDIATELY!!! ILL MARK U BRAINIEST IF U DONT LEAVE A LINK OR GUESS!!
Answers
Answer:
Weathering
Explanation:
Weathering takes a long time to occur, usually through water moving through the ground or wind slowly changing the terrain.
Answer: weathering
Explanation: if you need an explanation then search up: "What are some slow changes to the earth's surface?"
_____ produces most of the Earth’s oxygen
a) Land plants
b) Soil bacteria
c) Photosynthesizing algae
d) Bacteria in the intestines
20 points need an answer asap taking quiz ow !!!
Answers
Photosynthesizing algae produces most of the Earth’s oxygen.
What are Photosynthesizing algae?By converting light energy to chemical energy through the process of photosynthesis, carbon dioxide and water are transformed into organic molecules.
Nearly all algae engage in the process, and in fact, much of what is currently known about photosynthesis was first uncovered through research on the green alga Chlorella.
The enzyme ribulose bisphosphate carboxylase binds carbon dioxide to ribulose bisphosphate, a 5-carbon sugar with two linked phosphate groups, during the dark processes.
Photosynthesizing algae produces most of the Earth’s oxygen.
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What condition are needed do an accurate radiometric date to be obtained form a mineral ample?
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The necessary condition is that the mineral must remain closed since its formation.
Radiometric dating, radioactive dating, or radioisotope dating is used to date rocks and carbon with trace radioactive impurities.
Heat, pressure, and temperature do not affect isotope decay. Radiometric dating is reliable. This method dates igneous and metamorphic rocks that sedimentary stratigraphic correlation cannot. 300 natural isotopes exist.
The parent's half-life must be known and long enough for it to be present in significant amounts at the time of measurement for accurate radiometric dating. Thus, mineral samples require these conditions for radiometric dating.
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A student reads in a newspaper that the soil in his area contains high levels of arsenic. Based on this information, he believes that his fellow high school classmates have this metal present in their bodies. To test his hypothesis, he conducts an investigation of the soil in his schoolyard to see if it is contaminated with arsenic. He tests seven different areas around the school and finds high levels of arsenic in each. He concludes that the students at the school must have high levels of arsenic in their systems as well. Which of these is the best evaluation of his conclusion?
A. His conclusion is valid because he tested enough areas of soil to validate his hypothesis.
B. His conclusion is flawed because he did not test the soil at the homes where the students lived.
C. His conclusion is valid because arsenic is a toxic metal and is easily absorbed by the human body.
D. His conclusion is flawed because he did not test the students to see if their bodies contained metal arsenic.
Answers
Answer: D. His conclusion is flawed because he did not test the students to see if their bodies contained metal arsenic.
Explanation:
According to the given situation, student has tested seven different areas around the school to determine the presence of arsenic in the soil and also found the presence of arsenic in the school system. But has not studied the presence of arsenic in the students to support the fact that the school students are also affected by arsenic. So, conclusions based on the presence of arsenic in the soil and the system is inconclusive for the present study.
EARTH SCIENCE //What is true about ice and liquid water?
A. Ice has a higher density than liquid water because it has less space between molecules.
B. Ice has a lower density than liquid water because it has more space between molecules.
C. Ice has a higher density than liquid water because it has more space between molecules.
D. Ice has a lower density than liquid water because it has less space between molecules.
Answers
Answer: B
Explanation:
When water freezes it expands.
Hope I helped!!!
Ice floats on water!! it’s less dense- there’s also more space between molecules because of hydrogen bonding.
hope that helps!
Do whales need oxygen to survive?
Answers
Yes, whales need oxygen to survive. Like us, whales are mammals that breathe air into their lungs. Because they lack gills, they can't breathe underwater like a fish can.
A blowhole, or nostril, on top of their heads, allows them to breathe. While swimming or resting beneath the water, this enables them to take deep breaths by only exposing the tops of their heads to the air. The strong muscles that surround the blowhole close it tightly after each breath to prevent water from entering the lungs of the whale or dolphin.
Dolphins only have one blowhole, whereas large whales, with the exception of the sperm whale, have two blowholes.
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How is ATP made from glucose?
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Glucose is converted into ATP by cellular respiration.During glycolysis, a glucose molecule with six carbon atoms is converted into two molecules of pyruvate, each of which contains three carbon atoms.
The metabolic process known as cellular respiration, which takes place inside of cells, releases energy and waste products by converting biochemical energy from meals into the chemical compound adenosine triphosphate (ATP).
Cellular respiration transforms glucose into ATP.The aerobic respiration of one glucose molecule in the cytoplasm and mitochondria results in the production of 38 ATP molecules.
Glycolysis, the Krebs cycle, and oxidative phosphorylation are processes that take place during cellular respiration.
Two molecules of pyruvate, each having three carbon atoms, are produced during glycolysis from a single glucose molecule with six carbon atoms. Two molecules of ATP are hydrolyzed to give energy for the initial stages for every molecule of glucose, but four molecules of ATP are created in the later processes.
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you may have noticed that water sticks to surfaces such as glass,which property of water is responsible for this phenomena.
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Answer: Adhesion
Explanation:
What causes the air to move in the opposite directions at 16.3 km compared to the surface winds?
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Please help me!!
Nondisjunction conditions in humans can cause genetic diseases such as Down syndrome. State the number of chromosomes and the characteristics that are found in an individual with Down syndrome.
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Answer:
XXY and autism, heart disease are some of the characteristics found
In the United States, where can volcanoes like those at B be found?
Mark this and return
Save and Exit
Answers
Volcanoes are produced when magma rises on top of plate B. Due to the tremendous temperature in the mantle, the leading edge of plate A moved toward the mantle as it subducted beneath plate B and melted.
A volcano mountain is created when magma from the earth's upper mantle surfaces and erupts. the lava flow that is created as magma rises to the surface and deposits ash. A fresh layer of lava is deposited to the surface as the volcano continues to erupt, building up to form a mountain. Divergent, convergent, and transformal plate borders are where the majority of seismic activity takes place.
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Necesito una imagen de un embrión de pez y un humano
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Answer:
ir a goog.le para fotos eso es todo lo que puedo decir ja.jaja
Explanation:
Explain the working of device that uses the principle of gas law
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Answer:
Gas laws, laws that relate the pressure, volume, and temperature of a gas. Boyle's law—named for Robert Boyle—states that, at constant temperature, the pressure P of a gas varies inversely with its volume V, or PV = k, where k is a constant.
Explanation:
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one similarity and one difference between parasitic and predatory modes of feeding
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Answer: The parasite obtains food and shelter from the host. Parasitism mode of life ensures food lodging and meals predatory modes is a relationship between
explanation:a Predator and a Prey in which the predator is a living organism that catches and kills another species for food. They do not get shelter from prey.
PLS HELP MEEEE!!!!!!!
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Answer:
B. Introduced pollutants like fertilizers
Explanation:
The damage from runoff of fertilizers is very significant.
A high relative humidity and sunshine hinder heat loss from the body by their adverse effects on the body, respectively, as:
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The correct option (C) decreased evaporation and increased radiation.
Why does relative humidity climb the most just before dawn?
The ability of the air to hold water vapor increases with temperature. As a result, relative humidity rises as the temperature rises and reduces as it approaches the dew point. Around daybreak, when the nighttime low temperature is generally quite close to the dew point, the relative humidity is typically at its peak.
How does a high relative humidity affect things?
The "Heat Index" is the name given to this combined impact. The heat index increases with increasing air temperature and/or relative humidity, making the outside air seem hotter to our bodies.
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A high relative humidity and sunshine hinder heat loss from the body by their adverse effects on the body, respectively, as:
A. increased condensation and radiation
B. increased convection and radiation
C. decreased evaporation and increased radiation
D. decreased condensation and decreased radiation
E. increased evaporation and increased convection
What is hypertension with heart disease?
Answers
Hypertensive heart disease is a long-term condition that develops over many years in people with hypertension.
When your high blood pressure (hypertension) is not controlled, it can lead to a variety of health issues, including heart failure and conduction arrhythmias. Hypertensive heart disease is caused by persistently high blood pressure (over 120/80 mmHg). Heart disease risk goes up as people get older and continue to have high blood pressure. People over the age of 65 are more likely to develop heart failure.
Your heart has to work harder to pump blood through your body when you have high blood pressure for an extended period of time.
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multicellular life appeared about 1 billion years ago name the eon that corresponds to this
Answers
Answer:
The Proterozoic Eon
Explanation:
The eons are the longest periods of geologic time. The Proterozoic eon is the geological eon from the appearance of oxygen in the atmosphere until the emergence of complex life forms (e.g., marine invertebrates). The Proterozoic eon started about 2.5 billion years ago and ended 541 million years ago. This eon can be divided into three geologic eras: Paleoproterozoic (2,500 to 1,600 million years), Mesoproterozoic (1,600 to 1,000 million years) and Neoproterozoic (1,000 million to 541 million years).
Humans rely on sensory receptors to interpret messages about their surroundings. Sensory receptors respond to mechanical, physical, or chemical stimuli. There are different kinds of sensory receptors for detecting different kinds of stimuli. Chemoreceptors are specialized nerve cells that pick up chemical stimuli, such as smells or the pH level of foods. Such stimuli tell the brain and body to react a certain way to protect the body. If a person in a controlled test is introduced to a safe chemical stimulus, what is the most logical prediction you could make?
A. The person will bat the eyelids to push the chemicals away with the eyelashes.
B. The person will plug the nose to shield the body from offensive chemical smells.
C. The person will cover the ears to protect the ears from chemicals in loud noises.
D. The person will bite the nails to keep the chemical from seeping into the fingers
Answers
The most logical prediction you could make is the person will bat the eyelids to push the chemicals away with the eyelashes.
Internal organs as well as specialized organs like the eyes, ears, nose, and mouth include sensory receptors. Each receptor type transmits a unique sensory modality that eventually combines into a single perceptual frame.
Chemoreceptors are specialized nerve cells or receptors that detect changes in the chemical composition of the blood. The prefix "chemo-" alludes to the chemical makeup of the blood. The brain receives this data from the chemoreceptors to assist in maintaining the balance of the respiratory and cardiovascular systems.
They are proteins that detect and engage with particular chemicals known as ligands on the cell membranes.
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What is the percent composition of fern spore 1 in the sediment of the Early Tertiary? You may write a range
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Answer:
Explanation: grains and fern spores to form a picture of the living landscape before and after the K-T event. ... Cretaceous period, Tertiary period, angiosperm, gymnosperm, pollen, spores, extinction, fossil, sediment, ... What is the percent composition of fern spore 1 in the sediment of the Cretaceous period? You may write a range.
The Cretaceous Period, in geologic time, is the last of the three periods of the Mesozoic Era. It followed the Jurassic Period and was succeeded by the Paleogene Period.
Between 5% and 15% is the percent composition of fern spore 1 in the sediment of the Early Tertiary.
What is the link between geological time scale and stratified patterns?The geological time scale and the stratified patterns of visible rocks in the landscape link, with deeper layers being older.Thus, we can conclude that Between 5% and 15% is the percent composition of fern spore 1 in the sediment of the Early Tertiary.
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Why do phospholipids tend to spontaneously orient themselves into something resembling a membrane?
Answers
The hydrophobic, nonpolar regions of Phospholipids must align with each other in order for the structure to have minimal potential energy and, consequently, higher stability.
Because their fatty acid tails are poorly soluble in water, phospholipids spontaneously form bilayers in aqueous solutions, with the hydrophobic tails buried in the interior of the membrane and the polar head groups exposed on both sides, in contact with water.
Phospholipids in the lipid bilayer of a cell membrane orient themselves so that the heads face outward because the heads containing the phosphate group are hydrophilic and the cytoplasm of the cell is an aqueous environment.
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Which description best fits the role of macrophages?
O Macrophages engulf pathogens.
O Macrophages make memory cells.
O Macrophages trigger allergies.
O Macrophages make T cells.
Answers
Answer:
The first option
Explanation:
Macrophages will try to prevent the spread and kill off the pathogen by fully engulfing them. Essentially the macrophage will try to eat them in order to stope them from doing more harm.
Hope this helps!
What does XY mean in pedigree?
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In a pedigree, XY represents a male. Squares are also used to represent men. A pedigree analysis is a chart that depicts the inheritance of genes from parents to offspring in a family tree.
Linkage refers to the phenomenon of gene inheritance and the retention of parental gene combinations in offspring. The genes that are found on the same chromosome and are inherited together are known as linked genes, and the traits that they control are known as related traits.
A gene is a collection of deoxyribonucleic acids (DNA) that is passed down from parents to children. A gene is made up of many nucleotides that code for different proteins. The DNA contains the genetic information required for the proteins.
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Please help!
Students in Ms. Brown's class are making observations in the garden outside of the school. They make a list of all the abiotic and biotic factors in their notebook. Part of the list is below:
Gravel
Grass
Butterfly
Sunflower
Bird feeder
Flowerpots
Which items on the list are a part of the garden ecosystem?
A- Gravel, bird feeder, flowerpots
B- All the listed items are part of the ecosystem
C- None of the listed items are a part of the ecosystem
D- Grass, butterfly, sunflower
Answers
Answer:
It is D- grass, butterfly, sunflowers
The items throughout the list like grass, butterflies, and sunflowers are a component of the gardening ecosystem.
What exactly is an ecosystem?An ecosystems is an area where vegetation, animals, and certain other organisms interact with the surrounding environment, weather, and other variables to form a bubble of life. In ecosystems, biotic and abiotic factors—or nonliving ingredients. Biotic variables include plants, animals, and other types of species.
Why are ecosystems so important?Ecological systems keep our soil healthy, purify our air, regulate our temperatures, recycle elements, and provide us with food. They provide tools and raw ingredients for producing medicines and many other goods. They form the foundation of civilization and sustain our economies.
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how do you do these ?
Answers
The vascular cylinder is located in plant _____.
xylem
roots
leaves
stems
Answers
Answer:
Roots and/or stemsExplanation:
The vascular cylinder, also know as the stele, is the central part of the root or stem containing the tissues derived from the procambium. These include vascular tissue, in some cases ground tissue and a pericycle, which, if present, defines the outermost boundary of the stele.
The image represents which biome? Also if you can please answer the other I will mark as Brainly!!!!!!
Answers
Answer:
1. Tundra
2. Tundra ecosystems are treeless regions found in the Arctic and on the tops of mountains, where the climate is cold and windy, and rainfall is scant. Tundra lands are covered with snow for much of the year, but summer brings bursts of wildflowers. ( Sorry I don't see any text to find evidence from it. )
3. The mineral resources include major reserves of oil and natural gas, large quantities of minerals including iron ore, copper, nickle, zinc phosphates and diamonds.
I couldn't figure the last one I'm sorry!
In science, one example of a theory is the cell theory. If a scientist collects evidence that questions the basics of a scientific theory, this means the theory is
Answers
The correct option (b) Going to be refined by further investigation.
A scientific hypothesis is an explanation of the source of a natural phenomenon or occurrence. It is based on the data gathered during the experimental process. It is normally examined and confirmed on a regular basis using a proper scientific process. It is backed by observations, measurements, and data analysis gained after the scientific method has been implemented.
The substance of scientific theory is always changing as a result of new discoveries and studies.
On the basis of the above explanation, Going to be refined by further investigation. is the correct option (b).
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full Question: If a scientist collects evidence that questions the basics of a scientific theory, this means the theory is
flawed to the point of being invalid
going to be refined by further investigation
going to be proven wrong
not based on fact or evidence
How might a hole between the ide of the heart affect the functioning of the cardiovacular ytem ?
Answers
The hole allows oxygen-rich blood to return to the lungs rather of leaving them to the rest of the body. Blood with and without oxygen now blend together.
The blood pressure within the arteries that supply the lungs may rise if the pulmonary valve defect is significant. To pump blood, the heart thus has to exert more effort. The hole increases that volume of blood passing through the lungs, which over time might harm the blood vessels there. Adult issues, such as excessive blood pressure with in lungs as well as heart failure, may result from damage to the blood veins in the lungs. The left side of the heart may pump too hard and the lungs may get overfilled with blood from a significant atrial septal defect. The left side of the heart ultimately enlarges and weakens if untreated. Pulmonary hypertension can also develop as a result of elevated blood tension in the arteries that supply the lungs.
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Change in a gene pool over time is the definition of _____.
A. metabolism
B. evolution
C. homeostasis
Answers
Answer:
B) evolution.........