Please help. This in an crossword puzzle.
A biologist was in a forest when he came across a family of squirrels hiding nuts for
the winter. The biologist was interested in this behavior, so he stayed and watched the
squirrels for a few hours. He recorded what he observed in a notebook. Which of the
following explains why this type of research is NOT considered an experiment?
O The biologist did not observe the squirrels for long enough to collect data.
The biologist did not collect valid data on the different species of squirrels present.
O The biologist observed the squirrels and did not test variables.
O The biologist came across the squirrels by chance and had no formal plan.
Answer:
biologist observed the squirrels and did not test variables
What happens when 2 objects fall in a tight closed room?
Answer:
all objects free fall at the same rate regardless of their mass.
Explanation: Heavy objects fall at the same rate (or speed) as light ones
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if we have red veins and red blood how do we have blue veins in our bodies FIRST ONE TO ANSWER AND EXPLAIN GETS BRAINILEST PLEASE HELP
Answer:
The colors we see are the result of which wavelengths of light are reflected back to our eyes. Veins appear blue because blue light is reflected back to our eyes.
Blue light does not penetrate human tissue as deeply as red light does. As a result, veins that are close to the surface of the skin will be more likely to reflect blue light back to the eye.”
In short, our veins appear blue because of a trick that light plays on our eyes and how the light interacts with our body and skin. All color works this way as light is a combination of all colors and when it reflects off of certain materials, it absorbs some colors and bounces back others to our eyes.
Explanation:
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Which animal trait was Darwin's theory of natural selection based on? (1 point)
O swimming ability of Galápagos iguanas
O beak morphology of Galápagos finches
O predatory behavior of foxes
o coloration of peppered moths
Answer:
beak morphology of Galápagos finches
Answer:
Beak Morphology.
Explanation:
His theory was based off of the finches from different areas and their ability to pick up food. The beak shape was based off of the diet of the bird. For example, if a finch had a diet consisting of seeds, it had a dense, powerful beak that was able to crush the seed.
Explain why most humans require a supply of glucose.
Answer:
Nerve cells and chemical messengers there need it to help them process information so basically without it your brain wouldn't be able to work well
Explanation:
Most humans require a supply of glucose because Nerve cells and chemical messengers they need it to help them process information. Without it, your brain wouldn't be able to work well.
Why do we need glucose everyday?
Glucose provides energy for physiological processes such as respiration, heart rhythm and the regulation of body temperature.
Why is glucose required in the cell?
Glucose provides quick energy for cells. Fat has more energy than glucose, but it requires some chemical conversions before we can get it into the process of cellular respiration, so it takes longer to use.
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Which part of the plant contains the most chlorophyll?.
Answer:
The palisade layer
The palisade layer contains the most chloroplasts as it's far close to the pinnacle of the leaf. The chloroplasts comprise the pigment chlorophyll. The palisade cells are organized upright.
What accounts for the climate change that is seen among the galapagos islands?
a. distance from the equator
b. ocean currents
c. difference in elevation
Ocean currents is responsible for the climate change at the galapagos islands.
Impact of ocean currents on the climate of galapagos islandsWeather in the Galapagos is different from other higher latitudes because of its geographical location. The ocean currents bring a unique seasons and climatic conditions. The climate is warm, rainy season and the cool.
So we can conclude that Ocean currents is responsible for the climate change at the galapagos islands.
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Answer:
Its C
Explanation:
Difference in ELEVATION
Which of the following is true?
O Rivers account for most of the earth's surface water
O Earth's water = 60% Ocean and 40% Freshwater
O Glaciers and Icecaps account for most of the freshwater on earth
O Most of the earth's freshwater is groundwater like rivers and lake
Answer:
C. Glaciers and Icecaps account for most of the freshwater on earth
Explanation:
Glaciers and icecaps make about 68.7% of the freshwater we have here on earth.
I hope it helps! Have a great day!
Sandra~
Answer:
C.
Explanation:
Glaciers and icecaps make about 68.7% of the freshwater we have here on earth, so that would make the answer C.
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bren~
What morphology is represented in the picture?
O Spirilla
O Rod shaped
O Filamentous
O Cocci
Please help with this question I have
osmotic potential definition
Answer:
osmotic potential (OP value) a measure of the tendency of a solution to withdraw water from pure water by OSMOSIS across a differentially permeable membrane. Pure water has an osmotic potential of zero at one-atmosphere pressure
Explanation.
Question 3 of 5
Which model best shows the movement of carbon dioxide during
photosynthesis?
O A. Atmosphere - plant
O B. Plant
atmosphere
O C. Soil
plant
O D. Plant
-
soil
SURMIT
Answer:
The answer is B: plant atmosphere
Answer:
Plant - atmosphere !
Explanation:
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Which factors affect the type of cloud that will be formed? select three choices. altitude temperature color of clouds size of ice pellets whether water condenses as liquid or ice
Answer:
To conclude, many factors affect cloud formation, including topography, air temperature, and humidity.
Explanation:
The factors affect the type of cloud that will be formed are temperature , color of clouds and water condenses as liquid or ice.
These factors affect the formation of clouds as cloud formation will have the all factors like humidity, water, temp, and also sometimes light.
What is altitude?It is the height of mountains or any plains, pleautue, and several other earth mountains, valley and sometimes also of the himalyan mountains.
Thus it is well explained.
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When does a zygote become an embryo?
once the embryo forms a heart, lungs, and brain
a few minutes after the male and female gamete fuse
once the zygote enters a safe environment either inside or outside of their mother
once the zygote starts dividing by mitosis and cell differentiation occurs
Answer:
Explanation:
The transformation of a zygote into an embryo adheres both to nature and to nurture: not only genetics but also environment determines the outcome. This idea has assumed many forms. A territory in the early sea urchin blastula contains clones of founder cells, and each clone contributes exclusively to one territory (Cameron & Davidson, 1991). Both the lineage of a founder cell, i.e. its nature, and the position of a founder cell, which determines how it is nurtured, contribute to its fate. Fertilisation, the topic of the first Forum, fixes the genes; interblastomere communication, the topic here, regulates gene expression. Blastomeres communicate like any other cell – via ligand-receptor interactions and through gap junctions. Saxe and DeHaan review these mechanisms. The definition of ligands and receptors becomes broadened in this context, and cell adhesions as well as gap junctions enter into the story. In spite of these entanglements, it appears that nature uses the same sorts of mechanisms to get cells to specialise that she uses to keep them talking. Thus, neurons and glial cells signal to one another via glutamate receptors and gap junctions (Nedergaard, 1994). Likewise, we expect neurotransmitters (and neurotransmitter transporters) to help signal differentiation. The biophysicist may ask whether electrical properties also play a role, but that we reserve for another Forum. If gap junctions figure in development as fusion pores that pass small molecules and electrical signals between blastomeres, another parallel suggests itself. Brian Dale asked in the first Forum: How does a spermatozoon activate an oocyte? This question, which concerns gamete communication, has produced two schools of thought and remains controversial (Shilling et al., 1994). Do sperm activate oocytes via contact-mediated mechanisms or through fusionmediated mechanisms? Or do both mechanisms occur, as they appear to in development?
which natural resource is mined to, produce a digital phone? pls help me
Which of these is a major difference between skeletal muscle and cardiac muscle? A.Skeletal muscle works very quickly; cardiac muscle works very slowly. B.Skeletal muscle does not fatigue ; cardiac muscle is fatigues quickly. C.Skeletal muscle is involuntary ; cardiac muscle is voluntary. D.Skeletal muscle is fatigues. muscle does not.
D.Skeletal muscle is fatigues. muscle does not.
Skeletal muscle is striated muscle-essentially the fibers slide on each other to shorten and lengthen.
Cardiac muscle is a bit of a mish-mash. It is quite contractile and has striations like skeletal muscle, but also has discs within the structure which speed the contractile process
Skeletal muscle is voluntary and will not contract unless stimulated by a nerve fiber (or an electrode). Cardiac muscle is involuntary and contracts even without nervous stimulation.
Answer:
D.Skeletal muscle gets fatigued while the cardiac muscle does not.
Explanation:
Cardiac Muscle Skeletal Muscle
Length
Shorter Longer
Controlled by
Autonomic nervous Somatic nervous
system system
The key difference between skeletal muscle and cardiac muscle is that skeletal muscle is under voluntary control while cardiac muscle is under involuntary control. Muscle tissue is one of the four types of tissues present in the animal body.What does dna have that determines all my traits
Answer:
These sections of DNA that contain information that determine your physical features are called genes. Since you have two pairs of chromosomes, you also have two pairs of genes, one from your father and one from your mother. These pairs of genes then determine certain physical features or traits.
Explanation:
what can help climate change the least?
A) A carbon tax
B)Economic growth
C) Increased energy effciency
D) Technological growth
Answer:
Economic growth
Explanation:
It would help the planet plants animals and people
1 it is a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.
A. Reverse fault
B. Normal fault
C. fault
D. Earthquake
it is a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.
The correct answer is letter D. Earthquake.
Earthquakes can be caused by movement of plate tectonics, eruption of volcanoes, and also man-made like huge explosions cause by explosive devices.
Which type of fiber helps a person feel full, therefore possibly causing weight loss?
Answer:
soluble fiber
Explanation:
soluble fiber draws water into your gut, which softens your stools and supports regular bowel movements. it not only helps you feel fuller and reduces constipation but may also lower your cholesterol and blood sugar level.
URGENT PLEASE HELP, WORTH 100 POINTS!!
1.What happens as the number of niches in an ecosystem goes up?:
1- biodiversity decreases
2- biodiversity increases
3- endangered species goes up
4- ecosystem stability goes down
2.What group of organisms has the greatest number of species?:
1- animals
2- insects
3- plants
4- protists
3.Why do coral reefs have such a high biodiversity?:
1- they have many different niches
2- they are found in northern latitudes
3- they are found in deep, warm waters
4- they have an unusually uniform habitat
Explanation:
1.What happens as the number of niches in an ecosystem goes up?:
Biodiversity increases- As the number of niches increases, I suppose there would be more competition for space
2.What group of organisms has the greatest number of species?
insects-In terms of numbers of species, insects certainly represent the largest percentage of the world's organisms. There are more than 1 million species of insects that have been documented and studied by scientists.
3.Why do coral reefs have such a high biodiversity?
they have many different niches-High biodiversity ensures the health of the reef. It spreads those roles across many species, so if one species is affected by a disease or other threat, that role won't be lost on the reef.
The nervous system has two main divisions, which include the central nervous system and the _____ nervous system.
Answer:
peripheral
Explanation:
The central cavity of a blood vessel is called the.
Answer:
The central cavity of a blood vessel is called the: Lumen.
Explanation:
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What type of fuel does each energy system produce?.
Answer:
carbon?
Explanation:
Energy systems produce ATP, during every process cellular respiration is the major process of the system.
How ATP as fuel produce by each energy system?During cellular respiration, all the metabolic intermediates finally produce ATP, and in glycolysis, the Kreb cycle produces reducing products which finally oxidize in the electron transport chain.
The electron transport chain produces fuel as ATP, it is an enzymatic chain reaction that produces an electromotive force that is responsible for the production of ATP.
ATP is a major fuel for every cellular process which acts as an energy form that is extracted from metabolic intermediates.
Therefore ATP is a major fuel produced by the system.
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Why are common areas difficult to conserve
Answer:
The production and consumption of natural resources is necessary for society to function
Explanation:
If you do more work in less time you have displayed more __
PE
Work
Joules
Power
Answer:
Power or #4
Explanation:
If you do more work in less time you have displayed more Power.
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Scientists have observed that in the Antarctic ecosystem Adélie and Chinstrap penguin populations have decreased in the past 40 years by about half. However, Gentoo penguin populations have remained steady and are possibly increasing. Increasing ocean temperatures in the Antarctic is resulting in less sea ice and less krill because krill depend on sea ice.
Which statement, if true, BEST explains why Gentoo penguins have a survival advantage in the changing Antarctic environment?
A.
Adult Gentoo penguins average about 0.5 kilograms more in weight than adult Adélie and Chinstrap penguins.
B.
Leopard seals prey heavily upon juvenile penguins.
C.
Gentoo penguins eat more types of prey than either Adélie or Chinstrap penguins.
D.
Penguins spend a large amount of their energy on keeping warm during harsh winters with very low temperatures.
Answer:
C.
Gentoo penguins eat more types of prey than either Adélie or Chinstrap penguins.
Explanation: It makes the most sense over the other ones.
Elisabeth is an oceanographer. On which of the following research expeditions would she travel from the photic zone to the aphotic zone?
A.) A snorkel trip from the intertidal zone to 55 feet off the beach
B.) A scuba trip from the surface down 100 feet
C.) A submersible traveling from the ocean surface to the abyss
D.) A research vessel from the beach to the open ocean
A research expedition traveling from the photic zone to the aphotic zone, is a submersible traveling from the surface of the ocean to the abyss.
What is aphotic zone and photic zone?Depending on the lighting, the waters are divided into:
PHOTIC ZONE → up to 200 m deep. DYSPHOTIC ZONE → between 200 m and 400 m deep. APHOTOTIC ZONE → below 400 m depth.With this information, we can conclude that a research expedition traveling from the photic zone to the aphotic zone, is a submersible traveling from the surface of the ocean to the abyss.
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Answer:
A submersible traveling from the ocean surface to the abyss
Explanation: