male tesosterone can affect facial hair, voice deepness, testicle size, muscle mass, agressiveness, etc
Sex-linked traits are determined by genes located on sex chromosomes. In humans, examples of sex-linked traits include certain conditions such as color blindness, hemophilia, and muscular dystrophy. These traits are more common in males because they receive one X chromosome from their mother, which if contains the recessive X-linked trait, it's expressed in males.
Explanation:Sex-linked traits are characteristics determined by genes located on the sex chromosomes. These traits tend to express differently in males and females due to the difference in the sex chromosome composition, XY in males and XX in females.
Examples of sex-linked traits can be seen in human genetics, where the alleles for certain conditions such as color blindness, hemophilia, and muscular dystrophy are X-linked. When a female parent who is homozygous for a recessive X-linked trait, she will pass the trait on to 100 percent of her male offspring, as they inherit their father's Y chromosome.
In addition, females who are heterozygous for these diseases are referred to as carriers, may not show any phenotypic effects, but will pass the disease to half of their sons and carrier status to half of their daughters. Thus, recessive X-linked traits tend to appear more frequently in males than females.
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Which is an organic molecule?
a.
hydrochloric acid (HCl)
b.
methane (CH4)
c.
water (H2O)
d.
carbon dioxide (CO2)
e.
oxygen (O2)
The answer to this is B. Methane
Rain forests cover just 6 percent of the Earth’s land surface, yet they contain _____ percent of Earth’s species. 30 60 70 40
Rain forests cover just 6 percent of the Earth’s land surface, yet they contain 70 percent of Earth’s species.
70 percent of Earth’s species
please help me asap!!!
D. Absorption
This is because when food materials are broken down the nutrients must be absorbed by the body.
Which of the choices below gives a true example of how a natural resource can be renewed?
When an area's natural gas has been used up, oxygen can replace the gas.
When forests have been cut down, new native trees can be planted.
When all of the coal is gone from a mine, new coal can be grown in its place. When the wind is calm, electric fan can be turned on to make the windmills move.
When the wind is calm, electric fans can be turned on to make the windmills move.
When forests have been cut down, new native trees can be planted
A. When an area's natural gas has been used up, oxygen can replace the gas.
Organic compounds consisting of various compounds of sugar are generally called
Answer:
The correct answer will be- carbohydrates
Explanation:
The carbohydrates are one of the four abundant biomolecules which are composed of the polymers of the sugar molecules.
The carbohydrates play important roles in the organism from a structural entity to storage functions. The carbohydrates formed of one type of sugar are known as monosaccharide, of two sugars are known as disaccharide and the more than two types are known as polysaccharides.
Thus, carbohydrate is the correct answer.
What is the genetic contribution to the onset of autism?
Answer:
Autism spectrum disorder (ASD) is a neurodevelopmental disorder characterized by very early onset of dysfunction in social communication and interaction, repetitive behavior, and limited interest. It is now believed that ASD is a result of complex gene-environment interactions, with strong and clear genetic influences. Hope this helps!
The onset of autism is significantly influenced by genetics, with high concordance rates observed in identical twins. Various gene mutations and environmental factors also contribute to the development of ASD.
The onset of autism spectrum disorder (ASD) is significantly influenced by genetics.
Research has shown high concordance rates for autism in monozygotic (identical) twins, ranging between 60%-90%, compared to much lower rates of 5%-10% in dizygotic (fraternal) twins and siblings. This suggests a strong genetic component. Studies have identified various genes and gene mutations involved in autism, particularly those crucial for the formation of synaptic circuits that facilitate communication between different brain regions. For example, de novo mutations, which are spontaneous and not inherited from either parent, have been frequently linked to cases of autism.The images show the wings of a bat and a bee. From this evidence, what can you conclude about the evolutionary relationship between these organisms?
i definitely different
Answer:
A.
The wing structures of the bat and the bee are different, indicating they didn’t inherit wings from a common ancestor.
A(n) ____ can take place only when the moon is in the new moon phase
Im not completely sure but I think the answer is Solar Eclipse.
Sorry if Im not correct btw
Explain the difference between prezygotic isolating mechanisms and postzygotic isolating mechanisms.
Prezygotic and postzygotic isolating mechanisms prevent interbreeding between different species. Prezygotic isolation occurs before fertilization, including mechanisms like habitat isolation and temporal isolation. Postzygotic isolation happens after fertilization, including mechanisms like reduced hybrid viability and reduced hybrid fertility.
Explanation:Prezygotic and postzygotic isolation mechanisms are both part of what scientists call reproductive isolation, which prevents different species from interbreeding. However, they operate at different stages of the reproductive process.
Prior to fertilisation, zygotic isolation takes place. It includes mechanisms like habitat isolation, temporal isolation, behavioural isolation, mechanical isolation, and gametic isolation. For instance, two species might live in the same area, but breed at different times of year (temporal isolation), or they might have different courtship behaviours that prevent them from successfully mating (behavioural isolation).
Postzygotic isolation, on the other hand, takes place after fertilization. It includes mechanisms like reduced hybrid viability, reduced hybrid fertility, and hybrid breakdown. For instance, even if two different species do mate and produce offspring, those offspring might be weak and unable to survive (reduced hybrid viability), or they might be healthy but sterile, unable to have offspring of their own (reduced hybrid fertility).
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In a laboratory population of flies, the female flies are gray and the males are yellowish gray. Biologists observed that all the male flies had an equal chance for reproduction, but the male flies with the brightest colors were more likely to successfully reproduce. What phenomenon could explain such a change?
Answer:
The correct answer is sexual selection.
Explanation:
Sexual selection is illustrated as a medium of natural selection that comprises a selection of mates of the contrary sex by the individual of one biological sex, and at the same time competing with the individuals of the similar sex for the members of the contrary sex.
As in the given question, the male flies exhibiting brightest colors are more effective in reproducing in comparison to the male flies exhibiting light colors, it shows that the phenomenon of sexual selection is taking place.
in which of the following massive data bases would you expect to find the daily temperature of the water in a specific coastal region
a. an oceanic and atmospheric data base
b. A comparative toxicogenomic database
c. A whole genome database
d. A protein structure database
A (sorry if wrong) !
What is gradualism? When is it most likely to apply?
Gradualism refers to the theory that evolution occurs through slow and steady changes, while punctuated equilibrium involves long periods of stability interrupted by rapid changes. Gradualism is expected in stable environments, whereas punctuated equilibrium may follow events like mass extinctions.
Gradualism in Evolutionary Biology
Gradualism is the theory that evolution occurs through a process of slow, steady, and gradual change. This concept implies that new species arise from the accumulation of small, incremental modifications over vast periods of time. Gradualism is most likely to apply in situations where environmental conditions are relatively stable and selection pressures change slowly, allowing for these small changes to accumulate into significant differences over time.
On the other hand, the punctuated equilibrium model of evolution describes periods of relative stasis in species, interrupted by bursts of rapid change. These bursts often occur due to significant environmental changes or isolation events that trigger speciation. In the context of the extinction of the dinosaurs, it's predicted that the punctuated equilibrium model would follow, as such a massive extinction event likely caused rapid environmental changes that could have led to the rapid evolution of new species.
While the concepts of gradualism and punctuated equilibrium may seem opposed, they are not necessarily mutually exclusive. The differences often come down to the time scale and granularity with which evolutionary change is studied. Disagreements about speciation models do not threaten the overarching theory of evolution by natural selection, which is supported by extensive scientific research.
Helppppppp
Before scientists determined that deer were the cause of the trillium decrease, what did most people believe was the cause?
A, Most people thought that trillium was not getting enough sunlight in the forest. B, Most people thought that trillium was not getting enough water in the forest.
C, Most people thought that garlic mustard was crowding out trillium in the forest. D, Most people thought that garlic mustard was eating the trillium in the forest.
A. Most people thought that trillium was not getting enough sunlight in the forest.
Explanation – Scientists used to believe that the population of trillium decreased because there were not enough sunlight to reach these plants. Later, it was found that deer used to eat the flowers of trillium plant that led to the decrease of its population.
The seed of the trillium plant is very nutritious and hence consumed by the deer. Because of this, trilliums were found to be unlikely to recolonize local areas on their own.
Answer:
Most people thought that garlic mustard was crowding out trillium in the forest.
Explanation:
How often does the body perform cellular respiration? once in the morning and once at night only at night continuously only when the body runs out of ATP
continuously
its breaking down the chemical bounds in ATP and its energy is essential for survival
Answer: Constantly
Explanation:
Cellular respiration is a kind of metabolic process by which the carbohydrates of the body are broken down into ATP molecules in the presence of oxygen.
The energy is stored in the bonds of ATP molecules which is released when the bonds are broken.
The cells of the body needs energy continuously so the cellular respiration occurs constantly.
PLEASE HELP!!
Which group of animals could be correctly classified as ectothermic?
Question 2 options:
robins, squirrels, mice
bears, snakes, wolves
frogs, lizards, snakes
bears, snakes, wolves
frogs, lizards, snakes
Explanation;Ectotherms are animals that primarily gains heat through the environment. Most mammals, including humans, as well as most birds are endothermic homeotherms, while most fish, invertebrates, reptiles, and amphibians are ectothermic poikilotherms. Ectothermic do not require energy to heat themselves, and can spend their energy on reproduction, which in some environments is more valuable than staying active in cold weather.How is ground water formed?
ground water forms when water from the surface seeps into the ground
It is formed by the rain. Or if it doesn’t rain then it’s formed by variations of components.
Complete the sentence about the continental drift theory
Alfred wegener proposed the theory of continental drift after he saw that the coasts of ___ and ___ looked like two interlocking puzzle pieces
1. A. Eastern Africa
B. Northern Africa
C. Western Africa
2. A. Eastern North America
B. Eastern South America
C. Western South America
The correct answers are:
1. C. Western Africa;
2. B. Eastern South America;
Alfred Wegener has spent lot of times looking at maps, as it was his job. One day he noticed something peculiar, the western coast of Africa and the eastern coast of South America were an almost perfect match. They looked like peaces of puzzle that belong together. In his mind this was suggesting that these two continents had been merged in the past, and than broke apart. He later got proof about his theory by observing the sea mounts in the Atlantic Ocean.
Answer:
c. Western Africa
B. Eastern South America
Explanation:
Examine the air pressure map.
Which type of line is shown on the map?
isobar
isotherm
radar
humidity
The correct answer is - isobar.
The isobars are closed lines that are connecting spots with the same air pressure, thus giving us information about the air pressure in certain places. The air pressure can be standard, low, or high. The standard air pressure is 1013.25 mbar, the low air pressure is bellow the value of the standard one, and the high air pressure is above the standard one.
The low air pressure means that there are warm air masses in the area, or more water vapor in the atmosphere, while the high air pressure means that there are cold air masses present in the area. The reason why the warm air masses have low air pressure is that they are less dense, thus have less mass, and make less pressure, while the cold air masses are denser, have more mass, and make more pressure.
The unit most commonly used for measuring the air pressure is milibar (mbar)
Answer:A
Explanation:
Why are certain traits adaptations in one ecosystem, but not in another? A. All ecosystems have the same amount of competition. B. Organisms can learn new adaptations. C. Ecosystems can have different conditions. D. Organisms lose adaptations when they migrate.
i am going to choose c because i think it is correct
Answer: C. Ecosystems can have different conditions.
Explanation:
Adaptations are the changes that occur in the physiology, genome, morphology and the behavior of the organisms so as to support their survival in the adverse environmental conditions. An ecosystem is a biotic community where the living beings interact with their non-living environment. The abiotic (non-living) and biotic (living) factors may vary from ecosystem to ecosystem depending upon the location.
Certain traits adaptations can be seen in one ecosystem but not in another this occurs due to the fact that C. Ecosystems can have different conditions. Organisms adapt according to their environment. For example, a white coat over the hare species will help the population to remain insulated and protected against the predators in snow region but the same species when exposed to tropical forests will not be able to survive due to excess warm temperature and will be detected by the predators easily.
Is it correct????????????????????
Yes your answer is correct I think
describe how lichen are used to indicate air quality
Lichens are composite organisms in which a single species of fungus (mycobiont) lives symbiotically with one or more algal species (phycobionts), some of which may be nitrogen (N) fixing (cyanolichens), e.g. members of the blue green algae. The fungus provides structure and protection for the algae which reciprocates, providing energy and assimilates, via photosynthesis. Many secondary metabolites are synthesised by the fungus, which are unique to lichen symbioses.
In Europe lichens have been used as sensitive bioindicators of air quality for more than a century. As with most vegetation, lichens show a range of sensitivities to pollutants. Not all lichens are sensitive to a particular pollutant, some can be remarkably tolerant. Among lichens are species that are sensitive to sulphur, nitrogen, acidity, halogens (e.g. fluoride), heavy metals and ozone.
which information do tiny fossils found in drilling samples from earths crust reveal about earths history?
Answer: microfossils help us decode the climate and what the ecosystem was like in the past.
Explanation:
Fossils are any remainder or evidence of an organism that lived long ago. The preserved remains of living beings or their traces of the past are documents of the history of life on planet Earth.
Depending on their size, they are classified as microfosiles or macrosophiles.
Macrophiles are visible sized fossils, such as bones, shells or petrified wood. While the microfossils are seen with the microscope. They are important for correlating sedimentary layers, when looking for oil, and they help us decipher the climate and what the ecosystem was like in the past. Examples of microfossils are diatomaceous, radiolaria and foraminifera.
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I hope it helps you. Regards. María
Answer:
changes in climate
Explanation:
If a liter of water is heated from 20 C to 50 C, what happens to its volume? a. The volume decreases. b. The volume increases. c. The volume first increases, then decreases. d. The volume first decreases, then increases.
If a liter of water is heated from 20 C to 50 C, the volume will increase.
PLEASE MARK BRAINLIEST!!!
Answer:
b.The volume increases.
Explanation:
We are given that a litre of water is heated from 20 degree celsius to 50 degree celsius .
Volume of water= 1litre
Volume of liquid is directly proportional to temperature
When volume of liquid increases then temperature is also increases .
When temperature is increases then the volume is also increases .
When temperature decreases then the volume of liquid decreases.
When temperature is increases from 20 degree celsius to 50 degree celsius then the volume of water increases.
Hence , option b is true,
Answer :b.The volume increases.
Which of the following is maintained across the terminals of a battery?
a) a potential difference
b) a voltage drop
c) an electric charge
d) both A and B
Answer:
Option D, both A and B
Explanation:
The potential difference is created across a battery (between its two terminal –one positive and the other one negative) when work is done to move a charge from one point to another. This potential difference is measured in volts. 1 volt is the potential difference between two points when one joule of potential energy is spent to move a charge of one coulomb from one point to the other.
Voltage drop across a circuit is the amount of electric current lost due to resistance/ impedance with in the cables of the circuit.
Hence, both potential difference and voltage drop occurs across the circuit,
Option D is correct.
As used in biology, the term “population” refers to the
A group of interacting individuals belonging to one species and living in same geographical area
in biology, a population is the number of all the organisms of the same group or species, which live in a particular geographical area, and have the capability of interbreeding
4. How does Pasteurization affect the number of bacteria present in milk?
Pasteurized milk doesn't contain these beneficial bacteria, although some good bacteria can be regained by culturing the milk into such foods as yogurt or kefir.
Column D: Which organism(s) eat this organism? (There could be many, but just list one or two.)
cactus
sage brush
annual flowers
ants
beetles
chuckwalla
kangaroo rats
tarantulas
scorpions
common king snake
Gila monster
fox
hawk
turkey vulture
bacteria
This is two questions
1)What actions help prevent air pollution?
2)How does air Pollution affect human health?
1) Many things can help lessen or prevent air pollution. We can plant more trees to help rid the atmosphere of the harmful gasses our factories release. We can reduce the number of smoke-emitting factories. Use solar power more too.
2) Air pollution affects our health in many ways. Just as smoking a cigarette can pose major health implications, so can breathing the polluted air that is constantly being release by all our cars and other machinery. Our life-spans can be shortened by the pollution, and more diseases could be caused to outbreak by harmful chemicals in the atmosphere.
Hope this helps :)
Which of those methods of waste management is most likely to produce air pollution
I guess its D because when you burn stuff the smoke goes into the air
Burning in an incinerator is the main cause of air pollution, and this method of waste management is hazardous, hence option D is correct.
What is incineration?The method of burning solid wastes in a big furnace at a very elevated temperature whereby making ash is called Incineration.
Incineration is the methodology of igniting hazardous materials at temperatures high enough to eradicate impurities. Incineration is run in an “incinerator,” which is a kind of furnace conceived for steaming hazardous materials in a blast section, it is a kind of container that use fuel concern to generate heat and burns the waste
It is a waste therapy process that includes the discharge of organic substances managed in waste materials.
Therefore, burning in an incinerator is the correct option.
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If a bunch of grapes represents a molecule, what does each grape in the bunch represent?
A cell
A tissue
An atom
An organ
The answer is an atom
Answer:
an atom
Explanation:
i just finished it ;)