Early hominins are among the earliest members of the Hominidae family. Based on fossil discoveries of early hominins, the defining skeletal change in early hominin evolution is the bipedal locomotion.The first evolutionary change that separated human ancestors from other primates is bipedal locomotion.
Bipedalism involves the movement on two legs instead of four and occurs when the body is centered over the legs. This is a defining characteristic of all hominins. This could have played a significant role in human evolution and the advancement of intelligence.
The evidence of bipedalism was discovered in the fossilized remains of early hominins.She lived approximately 3.2 million years ago in Ethiopia and was approximately three feet six inches tall. Lucy's discovery was critical in the understanding of bipedalism in early hominins.
The shape of her pelvis indicated that she walked upright, and the position of her foramen magnum in the skull suggests that her head was held on top of her body, a trait that is only present in bipeds.Bipedalism in early hominins was not as efficient as it is in humanFurthermore, their brains became larger, and their skulls and jaws changed, indicating dietary changes. These changes are some of the defining skeletal changes in early hominin evolution.
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A single-celled organism can be classified as a prokaryotic cell based on the absence of-
A.a cell membrane.
B.ribosomes.
C.chromosomes.
D. a nucleus.
Answer:
D. nucleus
Explanation:
Hope this helps!
do cells use energy to get rid of salt or water?
Answer: It regulates the electrical charges moving in and out of the cells of the body.
Explanation:
what is not true about a nerve impulse? choose one: a. it is another term for an action potential. b. it can travel long distances without weakening. c. it is electrical excitation of the plasma membrane that is propagated rapidly along the membrane and sustained by automatic renewal along the way. d. it can travel at speeds of 100 meters per second. e. it depends entirely on the action of ligand-gated ion channels.
A nerve impulse is not dependent entirely on the action of ligand-gated ion channels. This statement is false. The nerve impulse, also known as an action potential, is a rapid and transient change in the membrane potential of a nerve cell that allows the nerve cell to communicate with other nerve cells, muscle cells, and glands.
A nerve impulse is not another term for an action potential. An action potential is a type of nerve impulse that travels down the axon of a neuron. A nerve impulse can travel long distances without weakening because of the automatic renewal that occurs along the way.
This is due to the presence of voltage-gated ion channels in the axon membrane.
The electrical excitation of the plasma membrane is propagated rapidly along the membrane and sustained by automatic renewal along the way.
The nerve impulse can travel at speeds of up to 100 meters per second in some nerve cells, but this is not always the case.
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1) Inaddition to water, mention the other three essential factors for seed germination.
2) What is the function of water in seed germination?
3) Some seeds do not germinate even though you have obtained the essential factors mentioned above. What is the condition called?
* Give two reasons for the situation you mentioned above.
Answer:
2 number answer goes like
During the beginning stage of the germination, the seeds take up water rapidly and this results in swelling and softening of the seed coat at an optimum temperature. This stage is referred to as an Imbibition. It starts the growth process by activation of enzymes. The seed activates its internal physiology and starts to respire and produce proteins and metabolizes the stored food. This is a lag phase of the seed germination.
By rupturing of the seed coat, radicle emerges to form a primary root. The seed starts absorbing underground water. After the emerging of the radicle and the plumule, shoot starts growing upwards.
Answer:
1) suitable temperature, air and oxygen
2) water soften the testa to enable both the plumule and radicle to emerge and it also allows diffusion of gases
3) Based on my opinion .... There is no water absent (dry cotton wool that used for germination), water is required for germination and the seed was kept in a refrigerator, thus low temperature is not suitable for germination.
Hope this helps
Embryology is the study of the development of an
the mother's uterus.
which is a fertilized egg attached to the wall of
Answer:
Embryo
Explanation:
It's in the name
Answer:
embryo
Explanation:
WILL GIVE BRAINLIEST!!!!!!!!!
True or False: Parasites kill their hosts to feed their offspring.
True
False
Answer:
True
Explanation:
Unlike saprotrophs, parasites feed on living hosts, though some parasitic fungi, for instance, may continue to feed on hosts they have killed. Unlike commensalism and mutualism, the parasitic relationship harms the host, either feeding on it or, as in the case of intestinal parasites, consuming some of its food
Answer:
TRUE
Explanation:
How do you explain how to come up with a hypothesis in one to two sentences?
Answer:
spend some time doing background research. Once you have completed a literature review, start thinking about potential questions you still have.
Explanation:
Answer: A hypothesis is an educated guess and is a minimum of two sentences. Do not use the words “I think”. The hypothesis can be written using the “If . . . then . . .” format. ... Include a second sentence using background information to support your hypothesis.
Each sentence below select the name of the specialized cells being described
Answer:
1. Neurons
2. White blood cells
3. Epithelial cells
4. Red blood cells
5. Muscle cells
Explanation:
Use the Figure below of part of the integumentary system to answer questions 7 and 8.
7. In what layer of the skin would you find this tissue?
8. Name the substance that is found in the uppermost layer of this tissue.
Answer:
lympathic tissue is the answer of 7
what level of ecology includes physical and chemical factors such as land and water? group of answer choices
The study of ecology involves the relationship between living organisms and their environment, which can be studied at various levels. This includes different levels of study of ecology, which may include individuals, populations, communities, and ecosystems.
The level of ecology that includes physical and chemical factors such as land and water is the ecosystem level. An ecosystem is a community of living organisms interacting with each other and their non-living environment such as air, water, and soil.
The ecosystem level is the most inclusive and broadest of all the ecological levels of organization, as it considers the entire biotic and abiotic system. The physical and chemical factors of an ecosystem such as land and water play a significant role in determining which organisms can live there.
The physical factors, such as temperature and water availability, determine what types of organisms can survive and thrive. The chemical factors, such as nutrient availability, pH, and salinity, can also limit the types of organisms that can survive in the ecosystem.
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in an emergency situation, the fight-or-flight hormone will increase the heart rate and blood pressure. this hormone is:
The hormone that increases the heart rate and blood pressure in an emergency situation and triggers the fight or flight response is epinephrine, also known as adrenaline.
Epinephrine is a hormone and neurotransmitter that is produced by the adrenal glands and certain neurons. It's sometimes referred to as adrenaline. Epinephrine is a vital component of the body's fight or flight response to stress. In response to a stressful situation, the body produces epinephrine, which increases heart rate, blood pressure, and respiratory rate to provide the body with more energy and oxygen.
This helps the body to respond to the threat, either by fighting or fleeing from it.In addition to this, Epinephrine is a medication that is used in emergency situations to treat severe allergic reactions, asthma attacks, and cardiac arrest. It works by narrowing blood vessels and raising blood pressure, making it easier for the heart to pump blood.
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You are a doctor in the emergency room. A runner comes in after completing a marathon and is dehydrated. You know the runner needs fluid through an IV but you have to decide between three options: A. Water (0% salt) B. Saline (water with 0.9 % salt) C. Saline (water with 2% salt)
Answer:
The correct option is B
Explanation:
Normal saline (or 0.9% of salt in water) is a common therapy used in hydrating the body; usually during sickness (and sometimes after an exhaustive exercise). This normal saline helps in maintaining electrolyte balance and prevent fluid shift between intravascular, intracellular, and interstitial spaces in the runner's body.
An increase in this solute concentration of the salt might lead to an imbalance in the body of the runner which could lead to some other problem for the runner.
How can tectonic plates move relative to each other ?
I know that I'm late but, the correct answer is:
The Earth's outer crust (the lithosphere) is composed of a series of tectonic plates that move on a hot flowing mantle layer called the asthenosphere. Heat within the asthenosphere creates convection currents that cause tectonic plates to move several centimeters per year relative to each other.
Describe what happens to the amount of available oxygen as you get deeper in the ocean.
Answer: The surface water is usually saturated with oxygen, absorbed from the atmosphere and from photosynthesis of algae. In the deep water the oxygen is consumed when breaking down the organic matter that sinks from the surface. ... In areas with poor water turnover the oxygen in the deep water can become completely used up.
Explanation:
The surface of the water is saturated with oxygen, absorbed from the atmosphere and from photosynthesis, In the deep of the dissolved oxygen is consumed and breaking down the organic matter which sinks from the surface.
what is dissolved oxygen in water ?Dissolved oxygen (DO) can be defined as the concentration of oxygen gas present in water. Oxygen absorbed from atmosphere can enters water and it is enhanced by turbulence.
Aquatic plants releases oxygen by photosynthesis is absorbed by Water, Sufficient amount of DO is crucial for growth and reproduction of aerobic aquatic life.
High temperatures can reduce the solubility of oxygen in water, High nutrients can causes the plant growth, resulting in decrease in DO due to respiration and decomposition.
Sediments can prevent DO from permeating interstitial areas, Oxygen is consumed as ammonia and if the oxygen levels is low, increase ammonia levels by inhibiting nitrification.
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1. The test results below indicate the presence of which nutrient?
Carbohydrate test
Protein test
Lipids test
Benedict test
Lugol test
Biuret test
Sudan Red test
Test
Test
Test
Test
O A. monosaccharide
B. polysaccharide
O C. protein
O D. lipid
The result of the test represents the presence of the polysaccharide nutrient.
Result of the test:All tested assays represent the negative result except the Lugol test since there is no change in the color in the Biuret and Sudan red that recommended that this should not be lipid or protein in the samples. Also, there is no decrement in the sugar i.e. presented in the sample since benefit test should be turned out negative and the lugol test should be come positive.
Therefore, option b is correct.
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Why does a layer of ice form on the surface of a pond during freezing weather?
Answer:
Water freezes from the top down—which allows ice to float—because of a strange quirk in how water's density behaves at falling temperatures. ... At 4 °C water is still in its liquid form. In lakes and rivers, this water will cool at the surface, grow denser, and descend.
Explanation:
Answer:
Colder than 4° Celsius (39° Fahrenheit), water begins expanding and becomes less dense as it gets colder. As a result, close to freezing, colder water floats to the top and the warmer water sinks to the bottom. ... Ice is less dense than water because of the way it forms a hexagonal crystalline structure.
Explanation:
Hope that helps!
if female reproductive success and male survivorship are the only things affecting fitness, how many components of fitness are there in this example? (use an integer for your answer)
In the example where female reproductive success and male survivorship are the only things affecting fitness, there are two components of fitness. Fitness in this scenario refers to the ability of an organism to survive and reproduce successfully.
The two components of fitness in this example are female reproductive success and male survivorship. Female reproductive success refers to the number of offspring produced by female individuals while male survivorship refers to the ability of male individuals to survive to the age of reproduction and produce offspring.The two components of fitness work together to ensure the successful reproduction and survival of the species. If the female individuals produce a large number of offspring but the male individuals are not able to survive and produce offspring, the fitness of the species will decrease.
In conclusion, the two components of fitness in this example are female reproductive success and male survivorship.
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a facet such as the superior and inferior articulating facets of the vertebra is described as
A facet is a small, flat surface on a bone or a tooth that serves as a point of attachment or articulation for muscles, ligaments, and other bones. The superior and inferior articulating facets of the vertebrae are examples of facets that aid in the articulation of two adjacent vertebrae in the spinal column.
These facets have a concave shape on one vertebra and a convex shape on the adjacent vertebra to allow for flexibility and movement of the spine. The superior facet of one vertebra articulates with the inferior facet of the vertebra above it, while the inferior facet of one vertebra articulates with the superior facet of the vertebra below it.
The superior and inferior facets of the vertebrae are important for the proper functioning of the spinal column, as they allow for the complex movements of the spine, such as bending, twisting, and rotation.
Furthermore, the superior and inferior facets of the vertebrae work in tandem with other structures, such as the intervertebral discs, to provide support and cushioning for the spine, protecting it from injury and degeneration.
In summary, the superior and inferior articulating facets of the vertebrae are examples of facets that help facilitate the articulation of adjacent vertebrae in the spinal column. They play a crucial role in the flexibility and movement of the spine, and work in concert with other structures to provide support and cushioning to the spine.
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Which is required for sexual reproduction?
mitosis
binary fission
diploid cell production
meiosis
Answer:
diploid cell production
Explanation:
in humans
Help me pls question Is on the pic
Answer:
A: 3, 2, 1, 4
4. Which foods would have the following nutrient test results?
Sudan Red test
O A. beef, peanut butter, tuna
OB. apple juice, honey, orange juice
O C. candy, table sugar, cola
O D. pasta, bread, crackers
5. Which of the following would test positive in the Biuret test, and negative in the Sudan Red test?
Answer:
4.) B. Apple juice, Honey, and Orange juice
Explanation: Hope this helps a lot,
The intensity of sunlight on Earth is affected by
A.) the mass of Earth
B.) the speed of Earth
C.) the number of rotations of Earth
D.) the curved surface of Earth
Answer:
The correct answer is D.) the curved surface of Earth.
Explanation:
The intensity of sunlight on Earth is affected by the curved surface of Earth, which causes the sunlight to spread out over a larger area. As a result, the intensity of sunlight is less at any given point on Earth's surface than it would be if Earth had a flat surface. This also explains why the poles receive less sunlight than the equator, as sunlight is spread out over a larger area near the poles due to the curvature of the Earth.
Factors such as the mass of Earth, the speed of Earth, and the number of rotations of Earth do not directly affect the intensity of sunlight on Earth.
for animals such as humans, where do the organic molecules required for building cellular material and tissues come from? group of answer choices sunlight food water absorption
For animals, including humans, the organic molecules necessary for building cellular material and tissues come from food that is consumed. When humans eat food, our digestive system breaks it down into its constituent molecules, such as carbohydrates, lipids, and proteins.
The molecules then move into the bloodstream, where they are transported to the cells that require them for growth and repair of tissues and cellular structures. In addition to food, water also plays an important role in the body's chemical reactions and cellular processes. Water helps to transport molecules throughout the body and is also involved in chemical reactions that break down complex molecules into simpler ones that the body can use. Sunlight is important for the production of vitamin D, which is necessary for bone health, but it is not a direct source of organic molecules for building cellular material and tissues.
Absorption is a process by which molecules move from one location to another, but it is not a source of organic molecules for building cellular material and tissues. In summary, food is the primary source of organic molecules for building cellular material and tissues in animals, including humans.
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Nonvascular plants have flagellated sperm that must swim to find the eggs. Why is this a limitation for land plants
Nonvascular plants have flagellated sperm that must swim to find the eggs this is because the land plants have pollinaters which help in pollination.
The transfer of pollen grains from anther to stigma of a flower is called pollination. Pollen grains are transferred mainly by wind, water, insects and animals. They are called pollinating agents.
The agents or media which can transfer the pollen grains for pollination are called the agents of pollination. Air, water, animals and insects are the common agents of pollination. Pollination by air: Light and dry pollen grains are carried by air to the other plants.
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how much energy in ev does this single photon of green light (525 nm) deliver to the receptor cells in the eye's retina?
The amount of energy in electron-volts that a single photon of green light with a wavelength of 525 nm delivers to the receptor cells in the eye's retina can be calculated using the following formula:
Substituting the given values into the formula, we have:
[tex]E = (6.626 x 10^-34 J s x 2.998 x 10^8 m/s) / (525 x 10^-9 m[/tex])
Converting joules to electron-volts (1 eV = 1.6 x 10^-19 J), we get:
[tex]E = [(6.626 x 10^-34 J s x 2.998 x 10^8 m/s) / (525 x 10^-9 m)] / (1.6 x 10^-19 J/eV)E = 2.36 eV[/tex]
Therefore, a single photon of green light with a wavelength of 525 nm delivers approximately 2.36 electron-volts of energy to the receptor cells in the eye's retina.
The explanation above is approximately 100 words.
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Claim-Evidence- Reasoning (CER)
Question: Are humans made of stardust?
which stars spend the least time in the main sequence stage?
Answer:
Type B stars
Explanation:
type B stars are the hottest, so they would burn up more quickly, spending the least amount of time on the main sequence.
Stars which spend the least time in the main sequence stage are type-B sequence stars.
What are type-B sequence stars?A B-type main-sequence star is a main-sequence star of spectral type B and luminosity class V. These stars have from 2 to 16 times the mass of the Sun and surface temperatures between 10,000 and 30,000 K. B-type stars are extremely luminous and blue.
Moreover, the Type B personality is characterized by a set of certain traits. People with this personality tend to be more laid-back and flexible.
Hence, Type B stars are the hottest, so they would burn up more quickly, spending the least amount of time on the main sequence.
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what do you use to mesure liqued volume
graduated cylinder or a buret can be used to measure the volume of liquids.
Other common Measuring InstrumentsSpeedometers, measuring tape, thermometers, compasses, digital angle gauges, levels, laser levels, micrometers, measuring squares, odometers, pressure gauges, protractors, rulers, angle locators, bubble inclinometers, and calipers are examples of common measuring tools.
The three measurements are:
length, width, and heightThe above enables us to convey the volume
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When a dead plant dies the matter that made up its body goes into the soil which of the following might next happen to the dead plant
A. It could make uo the cell wall of bateria
B. It could make up the eidermis of a worm
C. It could make up the stalk of a mushroom
D. All of the above
Answer:
D.All of the above
..........
Answer:
D.All of the above
Explanation:
you found an organism that is: unicellular, contains dna as its nucleic acid, and has a cell wall made of peptidoglycan. do you know what group your organism belongs to given these characteristics?
The organism you found that is unicellular, contains DNA as its nucleic acid, and has a cell wall made of peptidoglycan belongs to the group of Bacteria.What are bacteria? Bacteria are a single-celled type of microorganism that are distributed all over the world.
They are classified as Prokaryotes since they lack a membrane-bound nucleus and membrane-bound organelles. They are classified into five groups based on their shapes:
cocci (spherical), bacilli (rod-shaped), spirochetes (spiral-shaped), vibrios (comma-shaped), and filamentous bacteria (thread-shaped).Bacteria can be both beneficial and harmful. Bacteria play an essential role in our ecosystem, they are involved in the nitrogen cycle and play an essential role in the food chain.
Bacteria are ubiquitous, and they are found almost everywhere, even in extreme conditions such as acidic hot springs and icy polar waters.
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