what structures work in antagonistic pairs to move bones?
Answer is Muscles.
Muscles work on contraction. Muscles can only pull and cannot push. This means that a muscle can only move a bone in one direction and there is no way to move the bone back again. This problem is solved by having muscles in pairs, called antagonistic muscles. The antagonistic muscles work in pairs. One muscle contracts while the other relaxes.
For example, the lower arm is moved upwards when the biceps muscle contracts and the triceps muscle is relaxed. To lower the forearm again, the triceps contracts and the biceps relaxes.
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What is the advantage of using the electromagnetic spectrum model?
A. It helps compare frequencies of light.
B. It helps change the wavelengths of light.
C. The color of light waves can be changed using the model.D. The intensities of light waves can be changed using the model.
Answer:
A it helps compare frequencies of light
Explanation:
Because the frequency of light will tell if the wavelength is longer or shorter.
Please give the brainiest
Answer:
The electromagnetic spectrum describes all the wavelengths of light.
Explanation:
What is the electromagnetic Spectrum model?
The scientists used the term electromagnetic spectrum to describe the entire range of light that exists in the universe. From gamma rays to radio waves, most of the light present in the universe is invisible to us.
The electromagnetic spectrum describes all the wavelengths of light. It explores an otherwise invisible universe, from exploding stars to dark nebulae.
The electromagnetic spectrum consists of radio waves (used in commercial television and radios, radar, microwaves ), infrared radiation, visible light, gamma rays, x-rays, and ultraviolet radiation rays.
All the wavelengths and frequencies of the electromagnetic spectrum are used in spectroscopy.
Thus the electromagnetic spectrum describes all the wavelengths of light.
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Fossil fuels are
A. a natural resource
B. renewable
C. made from minerals
D. burned in hydroelectric plants
Oxygen-rich blood from the lungs enters the heart at what structure
Answer:
left atrium
Explanation:
Using today's technology, a spacecraft from Earth could travel the distance between _______ in a person's lifetime. A. galaxies B. stars C. planets D. all of the above
the answer is c - planets
Answer:
Planets
Explanation:
The water temperature process in which is forced into the air is called
A. Purification
B. Aeration
C. Sedimentation
D. Filtration
Answer:
Aeration
Explanation:
Which shares the same phylum as the hawk? A. fungi B. whale C. jellyfish D. sunflower
what can a green plant cell do that an animal cell cannot
Are humans and mammals the same? fact:
evidence:
Worth 40 points
Organisms choose to live in a clumped dispersion for all of these reasons except
A) it increases protection
B) helped with access to food
C) it increases mating possibilities
D) it decreases intraspecies competition
Clumped dispersion provides benefits such as A) increased protection, B) access to food, and C) mating possibilities, but contrary to decreasing intraspecies competition, it often increases it due to the concentration of individuals in resource-rich areas.
Organisms choose to live in a clumped dispersion for several reasons; however, one reason that is not a benefit of clumped dispersion is that it decreases intraspecies competition (D). In a clumped dispersion pattern, organisms are clustered together in groups, often reflecting a patchy distribution of resources in their environment or social behaviors. Reasons for choosing clumped dispersion include:
(A) It increases protection as being part of a larger group can provide each individual with protection from predators.(B) It can help with access to food, as prey animals may rely on each other to acquire food.(C) It increases mating possibilities because organisms that are closer together may have easier reproduction opportunities.In contrast, clumped dispersion does not decrease intraspecies competition; in fact, it can sometimes increase it since individuals are concentrated in specific areas where the resources are located.
What is one function of roots
Answer: The correct answer is-
To take in minerals form soil.
Roots are the significant organs of vascular plants that are located below the surface of soil.
They have specialized adaptation in their structures that enable them to absorb mineral ions ( such as sodium, potassium, phosphates, nitrates, magnesium that are very essential for plant growth) and water from the ground.
For instance, some plants possess fibrous roots that increase the surface area for absorption of minerals and other plants have tap root system ( that penetrates deep down to access water reservoirs) with lateral branches.
What are 3 effects of glaciation?
If the area of a circle measures 4π cm2, what is the circumference of the circle in terms of π?
A particular species is collected and is described as “dark red-brown”. How could we tell if this alga is a member of the Rhodophyta or of the Phaeophyta?
We can differentiate between two algae type that contain similar pigments by paper chromatography.
Rhodophyta and PhaeophytaRhodophyta are red algae and are the oldest eukaryotic algae. In red color algae, phycobiliprotein is present as pigment.They are found abundantly in marine areas.Phaeophyta are brown algae in which the chlorophyll is covered with a pigment called fucoxanthin.Thus, by chromatography we can find out which pigment is present in the species and easily find out the species of the algae.
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A large molecule enters a cell. Which process makes this possible ?
The association of three or more states created for mutual benefit and the achievement of shared objectives is ____. A) environmentalism B) nationalism C) regionalism D) supranationalism
Classification systems ?
Are all the same
Are all different
Vary with the taxonomists
None of these
Answer: Are all different
Explanation:
A classification system is a system of categorizing, organization and naming the organisms or entities in a proper order. The classification system varies according to different subjects, author and utility of classifying the subjects of classification. It is the basis of identification, and grouping of the organisms or entities. Thus all the classification systems are different.
What is the greatest cause of biodiversity loss today?
Answer: Habitat destruction is a major cause for biodiversity loss. Habitat loss is caused by deforestation, overpopulation, pollution and global warming. Species which are physically large and those living in forests or oceans are more affected by habitat reduction.
Explanation:
The diverse life forms living mutually in a region is called biodiversity. It comprises flora, fauna, microbes, fungi and many others.
The major cause for biodiversity loss today is Habitat destruction.
Due to the large cutting down of trees, overgrazing of fields, contamination and global warming the natural environment of flora and fauna are disturbed.Due to human interventions many animals have lost their territories and are on edge of extinction.Humans have cleared large forest regions to set up industries and construction units causing deforestation.Over exploitation of sources has led to the deficiency of reservoirs like petrol and diesel.Therefore, habitat invasion is one of the greatest cause for biodiversity loss.
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Eric observes a metamorphic rock that has flattened, ribbon-like layers of shiny, flattened crystals. What is the best explanation for how the rock was formed?
A. Compaction and cementation
B. Cooling of magma or lava
C. Erosion and melting
D. Intense heat and pressure inside Earth
I think it's D, but I'm not sure.
when studying heredity, what is the relationship between dna bases and traits
The relationship between DNA bases and traits is that, the nitrogen bases in DNA decide the traits on an organism. The traits differ with respect to the nucleotides.
What is heredity ?The study of heredity examines how qualities are conveyed from one generation to the next through sexual reproduction. Cells in offspring inherit their parents' genetic makeup.
The characteristics of an organism are determined by the placement of nitrogenous bases in DNA. Each triplet of three bases codes for a distinct amino acid.
The nucleotides that make up the mRNA are determined by the DNA bases (Adenine, Guanine, Cytosine, and Thymine), and the codons that determine which amino acids are coded by those codons are determined by the mRNA nucleotides.
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A chondroblast will produce the fibers and ground substance for
What is the location of cellular respiration?
A) Chloroplast
B) Chlorophyll
C) Mitochondria
D) Sunlight
A neutron star collapses into a black hole because of the force of fusion or gravity
viruses do not have the ability to reproduce on their own, they need a blank
Final answer:
Viruses require a host cell to conduct replication, as they cannot reproduce on their own due to the lack of essential components and metabolic machinery. They use the host cell's resources to produce viral particles and exhibit specificity in infecting cells that possess the required viral receptors.
Explanation:
Viruses do not have the capability to reproduce on their own; they need a host cell to facilitate the process known as replication. Viruses are not considered living organisms since they lack essential components like a plasma membrane, cytoplasm, and ribosomes. Unlike cellular life forms, they cannot perform metabolic activities or maintain homeostasis independently. Therefore, they must infect a living host, which provides the necessary cellular machinery and metabolism for the virus to produce new copies of itself.
Once inside the host cell, a virus commandeers the host's ribosomes, enzymes, ATP, and other resources to produce viral particles. Viruses show specificity in the cells they can infect, which is often determined by the presence of specific viral receptors on the surface of the host cell. This specificity depends on the host's metabolic processes and gene expression, which ensure the necessary substances for replication are available.
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You will compare and contrast analog and digital signals to determine which is more reliable for encoding and transmitting information. You’ll compare these features: signal shape numerical values for signal measurements amount of data that can be transmitted energy requirements privacy and security (ability of the signal to be encoded in a secret code) clarity of signal In the space provided, write down what you already know about any of these features. If you’re not sure, write down questions you might have about the features.
The best between analog and digital signals to know which is more reliable for encoding and transmitting information is digital signals
Why is digital signals best?Digitized signals are known to be signals that are often sent as wave pulses and as such they are said to be very reliable way to encode and transmit information when compared to analog signals.
Note also that Digital signals are made up of patterns that are created as a result of sampling of a stream of continuous data at consistent intervals and they are sent or transmitted as pulses.
Therefore, The best between analog and digital signals to know which is more reliable for encoding and transmitting information is digital signals
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Digital signals are often more reliable than analog signals due to their resistance to noise, capacity for encryption, data compression capabilities, and the ability to regenerate signals without loss of quality.
Comparing Analog and Digital Signals
When determining which is more reliable for encoding and transmitting information, both analog and digital signals have distinct characteristics.
Signal Shape
Analog signals are continuously variable, representing data in a wave-like form. Digital signals consist of binary ones and zeros, creating a discrete or step-like waveform.
Numerical Values for Signal Measurements
Analog signals use a decimal numbering system, while digital signals rely on binary numeric systems (ones and zeros).
Amount of Data Transmitted
Digital data, such as those used in WiFi and Bluetooth, often allows the transmission of more data due to high-frequency carrier waves and data compression techniques.
Energy Requirements
Both analog and digital signals require energy to transmit, with a minimum energy per bit needed for wireless reception. Digital systems tend to be more energy-efficient due to better compression and transmission techniques.
Privacy and Security
The ability to encrypt digital data provides a high level of security and privacy not as easily achieved with analog transmissions.
Clarity of Signal
Clarity in digital signals is often superior because they are less susceptible to noise and can regenerate without the loss of quality.
Digital signals generally provide greater reliability for encoding and transmitting information than analog signals due to advantages in noise resistance, data compression, and encryption potential.
Please help!
Answer the below question in a paragraph.
1. Describe the plants and animals that would be found at the “Young Forest Stage” of a forest ecosystem?
2. Crocodiles are one of the oldest species on the planet. They have adaptations that allow them to exploit many niches. Explain what behavioral and structural adaptations have contributed to their success.
Answer to question no. 1:
A forest is at its young stage when it’s hardly touched by human or any external or harmful intervention, leaving it as natural as it is. That means it is filled with healthy vegetation, saplings everywhere, mature trees, vines and shrubs.
In this very rich forest environment, many species of animals thrive. Most of them would be endangered species of migratory songbirds, mammals like white-tailed deers or rare insects.
Answer to question no. 2:
Crocodiles are able to adapt in most areas and can live for a long period of time due to several factors:
1) They are cold-blooded. A cold-blooded animal would have very slow metabolism so they can live without food for many months. One big meal can keep them full for a long time.
2) They can survive both on land and water.
3) Just like mammals, the crocodile’s heart has four chambers that allows them to control their body temperature at a constant level. This is why they are able to adapt in many places.
4) Crocodiles have strong senses which makes them good hunters / predators
a. Sense of sight: they can see underwater and have night vision
b. Good sense of smell
c. Sensory buds in their jaws that help them detect vibrations and movements
Explain the law of conservation
What conclusion does the fossil record support?
A. Species have changed over time.
B. Traits acquired during a lifetime are passed to offspring.
C. Earth's organisms have not changed over time.
D. All of Earth's organisms were formed at the same time.
wo events in space are described below. Event 1: The moon travels between the sun and Earth and prevents the sunlight from reaching Earth during daytime. Event 2: The moon moves into the shadow of Earth at night, and this makes it difficult to see the moon from Earth. Which event or events represent(s) a solar eclipse on Earth
Cross a heterozygous running, heterozygous Black mouse