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.
both parents are heterozygous for the Huntington's allele. what is the chance that their child will not have Huntington's disease
Answer:
25% or 1/4
Explanation:
The cross in this question involves a gene coding for the possession or not of Huntington's disease in humans. The dominant allele is denoted by (H) while the recessive allele is denoted by (h). The possession of the dominant allele by an individual means the possession of the Huntington's disease.
In a cross between two heterozygous parents i.e. combination of both dominant and recessive alleles (Hh). Four possible offsprings will be produced with genotypes HH, Hh, Hh and hh.
The genotypes HH, Hh and Hh will phenotypically possess the Huntington's disease while the hh genotype will not possess the Huntington's disease. Hence, the chance of having a child without the disease is 1/4 or 25%.
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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Fossil fuels are
A. a natural resource
B. renewable
C. made from minerals
D. burned in hydroelectric plants
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.
Mendel suggested that each trait is the result of the interaction of two factors for that trait.
Which term names these factors?
A.
genes
B.
alleles
C.
traits
D.
gametes
Alleles is the term which terms the factor mentioned by the Mendel.
B. alleles
Explanation:
Alleles allude to various types of similar qualities. Greg-or Mendel known as the Father of Genetics played out a trial with various attributes of pea plant which actuates seed shape and shading, pod shape and shading, blossom shading, stem size and area of the bloom in the stem. He crossed qualities liable for the effort of these attributes.
He made a cross among, tall and diminutive person pea plants. The allele for the tall plant is "TT" while the allele for the diminutive person plant is "tt".When they are crossed the posterity will be Tt which expresses that all are tall. From this Mendel recommended that every character is the consequence of the collaboration of two alleles for that quality that is "TT" and "tt" are the alleles liable for the effort of an attribute called tallness.
B ia your answer hope this helpe
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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.
Cross a heterozygous running, heterozygous Black mouse
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
Which condition can cause a population crash?
When the number of individuals within a group or population or species suddenly decline it is termed as population crash. This term is often referred when the human population declines suddenly impacting the economy and the quality of life.
The causes of population crash includes competition for the environmental resources required for survival is under scarcity and this implies only the fittest can survive according to the Darwin’s theory. The other major reason can be any natural disaster like floods, droughts, earthquake, volcanic eruption, fire, incidence of some disease or epidemic condition.
A large molecule enters a cell. Which process makes this possible ?
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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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
A neutron star collapses into a black hole because of the force of fusion or gravity
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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Consider the following chemical reaction,
O^2 + 2H^2 = 2H^20
What are the reactants?
What are the products?
How many molecules of H^2 are used in this reaction?
Sorry if this question doesn't make much sense... ;o;
What are 3 effects of glaciation?
A group of science students have been learning how the human circulatory system reacts during exercise. The students measured their heart rates both before and after they ran five laps around the school gym. This was repeated two more times, with a 5-minute rest period between each trial. The average heart rates of the students are shown in the bar graph. State the general relationship between exercise and the heart rate in humans?
Exercise increases heart rate and cardiac output, which enhances the heart's efficiency and overall cardiovascular health.
Explanation:The general relationship between exercise and the heart rate in humans is that during exercise, the heart rate increases to supply more oxygen-rich blood to meet the demands of the working muscles. Cardiac output, which is the volume of blood the heart pumps per minute, also increases during exercise. The nonathlete's cardiac output can increase from about 5 liters per minute at rest to about 20 liters per minute during exercise, and well-trained athletes can reach over 30 liters per minute. Exercise enhances the heart's efficiency, evidenced by an increase in the heart's size and mass, which leads to a stronger heart that can pump more blood with each contraction (stroke volume), thus increasing cardiac output.
In summary, the relationship between exercise and heart function is an increase in heart rate and cardiac output, which is part of the body's natural adaptation to the increased physiological demands of exercise. This adaptation results in improved vascular homeostasis and overall cardiovascular health.
If the area of a circle measures 4π cm2, what is the circumference of the circle in terms of π?
WILL MARK BRAINLYST
Two squirrel populations are prevented from mating with each other because they live on opposite sides of the Colorado River. After thousands of years of evolution, the two populations have become two separate and distinct species. They can no longer mate and produce fertile young with the other squirrel population. This process is an example of
A, speciation
B, resistance
C,fossil record
D, asexual reproduction
During a chemical reaction, the amount of energy
A) may increase or decrease depending on the type of reaction
B) increases as it is converted from one form to another
C) decreases as it is converted from one form to another
D) is constant as it is converted from one form to another
_____ tissue covers the outer surface of herbaceous or soft-stemmed plants
Answer:
The correct answer would be dermal tissue.
Explanation:
The dermal tissue protects the soft tissues of herbaceous plants and soft-stemmed plants and regulates interactions with the surroundings of the plants.
It is a very thin layer that secretes a waxy layer called the cuticle that prevents water loss from the plants. It has stomata that help in the gaseous exchange of the atmosphere. It arises from the primary meristematic tissues.
Thus, the correct answer would be dermis tissue.
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.
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.
Using technology, scientists are now able to use genetic information to classify new species. What is the likely impact of this advancement on the classification system?
The existing classification system may change to accommodate the new information.
The existing classification system will be replaced completely.
Organisms would be classified based only on their mode of nutrition.
Organisms would be classified based only on physical characteristics.
Answer:
A
Explanation:
take in new information and let out old.
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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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which biome would you find plants that are adapted to survive in hot dry climates
What causes the seasons? Please use two complete sentences
Answer: The seasons are caused by the tilt of the Earth's rotational axis away or toward the sun as it travels through its year-long path around the sun. The Earth has a tilt of 23.5 degrees relative to the "ecliptic plane" (the imaginary surface formed by it's almost-cicular path around the sun).
Explanation:
A chondroblast will produce the fibers and ground substance for
Automobiles cause air pollution when they burn gasoline. Laws have been passed to make automobile manufacturers limit the amount of pollution released from automobiles. Which act or organization was MOST LIKELY responsible for these laws?