_______ Which vitamins and minerals must be listed on food labels?
a. vitamin D, vitamin C, iron and magnesium
b. vitamin C, calcium, iron and potassium
c. vitamin C, vitamin A, calcium and iron
Which of the following provides the foundation for life on earth?
solar energy
nuclear energy
natural resources
renewable resources
Answer:
The correct answer would be - solar energy.
Explanation:
Solar energy or the light energy that comes from the sun is one of the major sources of energy for all living forms directly or indirectly. There would be no life without solar energy on earth.
Solar energy is responsible for the food and energy of each and every living organism. Plants produce their food with the help of sunlight or solar energy and the rest of the other organisms depend on this food for their food and energy.
Offspring of certain fruit flies may have yellow or ebony bodies and normal wings or short wings. Genetic theory predicts that these traits will appear in the ratio 9:3:3:1 (9 yellow, normal: 3 yellow, short: 3 ebony, normal: 1 ebony, short). A researcher checks 100 randomly selected fruit flies and finds the distribution of the traits to be 59, 20, 11, and 10, respectively. Are the results this researcher observed consistent with the theoretical distribution predicted by the genetic model
Answer:
Yes, the observed results are consistent with the theoretical distribution predicted by the genetic model. The population is in equilibrium.
Explanation:
Available data:
Offspring of fruit flies may have yellow or ebony bodies and normal wings or short wings.Expected phenotypic ratio 9:3:3:19 yellow, normal: 3 yellow, short: 3 ebony, normal: 1 ebony, shortSample size , N = 100Phenotypic distribution 59:20:11:10To know if these results are consistent with the expected ones, we need to develop a chi-square analysis. To do it we need the following information
Chi square= ∑ ((Obs-Exp)²/Exp)- ∑ is the sum of the terms
- Obs are the Observed individuals
- Exp are the Expected individuals
Freedom degrees = K – 1- K =genotypes number = 4
Significance level, 5% = 0.05 Table value = Critical value
First, define the hypothesis:
Hypothesis: The allele of this population will assort independently. The population is in equilibrium
H₀= Individuals will be equally distributed.
H₁ = Individuals will not be equally distributed.
Second, we need to get the expected number of individuals with each phenotype. To do it, we will use the expected phenotypic ratio and the total number of individuals in the sample. We can just perform a three simple rule, as follows:
16 ------------------------------------ 100 individuals in the sample ------- 100%
9 yellow, normal ---------------- X = 56.25 individuals -------------------56.25%
3 yellow, short ------------------- X = 18.75 individuals --------------------18.75%
3 ebony, normal -----------------X = 18.75 individuals ---------------------18.75%
1 ebony, short ---------------------X = 6.25 individuals ----------------------6.25%
Now that we know the expected numbers of individuals with each genotype, we can compare them with the observed ones.
yellow, normal yellow, short ebony, normal ebony, short
Expected 56.25 18.75 18.75 6.25
Observed 59 20 11 10
The chi-square value = Σ(Obs-Exp)²/Exp.
So now we need to calculate (Obs-Exp)²/Exp
yellow, normal(Obs-Exp)²/Exp = (59-56.25)²/56.25 = 0.134
yellow, short(Obs-Exp)²/Exp = (20 - 18.75)²/18.75 = 0.083
ebony, normal(Obs-Exp)²/Exp = (11 - 18.75 )²/18.75 = 3.203
ebony, short(Obs-Exp)²/Exp = (10 - 6.25)²/6.25 = 2.25
X² = Σ(Obs-Exp)²/Exp = 0.134 + 0.083 + 3.203 + 2.25 = 5.67
X² = 5.67Significance level = 0.05Degrees of freedom = genotypes number - one = 4 - 1 = 3Critical value or table value = 9.348P₀.₀₅ > X2
9.348 > 5.67
There is not enough evidence to reject the null hypothesis. The genotypes might be in equilibrium, and there might be an independent assortment.
can someone plzz help me on this its hard:( ill give brainliest
Answer:
B
Explanation:
Elements such as The lungs exchange gas to maintain homeostasis. In the alveoli of the lungs, oxygen and carbon dioxide are exchanged. This exchange occurs between the lungs and blood vessels (capillaries). The transport of oxygen to the blood does not require energy. The membranes of the alveoli are thin and moist and allow gasses to dissolve and be transported to and from the blood. When we breathe, a high concentration of oxygen enters the lungs and moves to the blood. Based on this scenario, is the transport of oxygen a result of osmosis, diffusion, or active transport?
Answer:
oxygen are among the few simple molecules that can cross the cell membrane by diffusion. And Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane. The oxygen molecules move, by diffusion, out of the capillaries and into the body cells. While oxygen moves from the capillaries and into body cells, carbon dioxide moves from the cells into the capillaries.
Explanation:
Answer:
This is Diffusion........... :)
List the possible phenotypes for rat eye color.
located at the top of the trachea, the _____ helps a person speak.
Answer:
It is either the epiglottis or larynx
Explanation:
what triggers angry in the brain?
Answer:
amygdala
Explanation:
Answer:
Anger starts with the amygdala stimulating the hypothalamus, much like in the fear response. In addition, parts of the prefrontal cortex may also play a role in anger. People with damage to this area often have trouble controlling their emotions, especially anger and aggression. Epinephrine or adrenalin released by medulla of the adrenal glands, surges at the time of panic and emergency. It provokes stress response and brings out the arousal of extreme emotions like fear, anger or amusement.
Explanation:
hope this helps! brainliest?
What is the main function of leaves?A. Leaves provide support for growth and a place to store food.B. Leaves provide a place for photosynthesis to occur.C. Leaves absorb water and minerals and transport nutrients to the stem.D. Leaves create a barrier that prevents water in the plant's tissues from evaporating
Answer:
B
Explanation:
The main function of a leaf is to produce food for the plant by photosynthesis.
Answer: The correct answer is B. Leaves provide a place for photosynthesis to occur.
Explanation: Confirmed correct.
What is the formula for work when power is present?
Answer:
below
Explanation:
Power equals work (J) divided by time (s). The SI unit for power is the watt (W), which equals 1 joule of work per second (J/s)
Las margaritas se cierran durante la noche y se abren al amanecer. Durante los inviernos fríos, algunos animales hibernan, a la espera de las estaciones mas cálidas, cuando abunda el alimento. Cuando sentimos frio se nos pone “la piel de gallina” y tiritamos, en cambio si hace calor, nos da sed y bebemos agua ¿Qué tienen en común estas situaciones?
Some male peakcocks used to have bright and large tails while others had dull, smaller tails. Female peacocks will only mate with the ones that have the brightest and largest tails. Explain how this would impact the offspring of male peacocks over time.
Answer:
Over time, most males will have bright and large tails. Females only mate with males carrying these traits, and so natural selection will favor them.
Explanation:
Bright and large tails are traits that reflect the genetic quality of males. So individuals with the most vibrant color and length express better capabilities of finding food, competing for resources, competing for males, among others, are the best option to mate and to ensure successful offspring.
The brightest and largest tails are, the better chances males have to mate and pass their genes to the following generations. So the organism spends energy and resources to produce more vibrant colors and longer feathers to enhance mating chances.
Females must ensure their reproductive success, so sexual selection is the pressure modeling males in this species. Females will only choose individuals with the better genetic charge to mate -individuals with brightest and largest tails-, so their progeny can have better genes and higher survival probabilities.
Males with the brightest and largest tails will mate and reproduce. They will pass their genes to their progeny. Male offspring will also have bright and large tails because they inherit these conditions from their parental. These male offspring will also pass their genes to the progeny, and so on. The frequency of the alleles that express these traits will increase in the population. Natural selection is favoring these alleles. So over time, there will be much more individuals with bright and large tails than individuals with dull and small tails.
a black chicken and a white chicken are crossed. what is the probability of.
Answer:
25% that they would have a black chick
Explanation:
50% of the offspring have genotype BW, 25% are BB and 25% are WW. This means that 50% of the offspring are erminette, 25% are black, and 25% are white.
Hope this helps!!
Please Help I willl mark Brainlist Please
Answer:
4 I think
Explanation:
The cytoplasm is home to many activities of the cell as it contains molecules, enzymes that are crucial in the break down of the waste. The cytoplasm also assists in metabolic activities. Cytoplasm provides shape to the cell. It fills up the cells thus enabling the organelles to remain in their position.
GIVING BRAINLIEST!!!!!
What adaptation of cactus helps it store water?
A) Large leaves
B) Red fruit
C) Strong roots
D) Thick stem
Answer:
D. Thick Stem
Explanation:
In which ways might ocean currents be like streams and rivers on land
Answer:
Ocean currents act much like a conveyor belt, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics. Thus, ocean currents regulate global climate, helping to counteract the uneven distribution of solar radiation reaching Earth's surface.
Ocean currents in different ways might be like streams and rivers on land they sweep along the predictable paths. Ocean currents flow at the surface, and flow deep within the waterbodies.
What are Ocean currents?Ocean currents act much like similar to a conveyer belt. Ocean currents transport warm water and precipitation of water from the equator towards the poles and cold water from the poles back to the tropics of the globe. Thus, the currents which regulate global climate, helping to counteract the uneven distribution of solar radiations reaching to the Earth's surface.
Ocean currents flow like that of vast rivers, sweeping along with the predictable paths. Some of the ocean currents flow at the surface and others flow deep within the water. Some ocean currents flow for very short distances, however others cross entire ocean basins and even circle the globe.
Learn more about Ocean currents here:
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Which process produces a greater number of offspring?
chromosome duplication
asexual reproduction
gamete formation
sexual reproduction
Answer:
asexual reproduction
Explanation:
Sexual reproduction produces a greater number of offspring compared to asexual reproduction, chromosome duplication and gamete formation.
What is the involvement in sexual reproduction ?This is because sexual reproduction involves the combination of genetic material from two parents, resulting in offspring that have a unique genetic makeup.
This increases the number of possible genetic combinations and thus the number of offspring produced. Chromosome duplication and gamete formation are involved in the process of sexual reproduction, but neither produces offspring by itself.
Chromosome duplication is the process by which one cell splits into two identical cells, each with the same genetic material. Gamete formation is the process by which reproductive cells such as sperm and eggs are formed.
These cells then combine during sexual reproduction to form a new organism. Asexual reproduction, on the other hand, involves a single organism producing offspring that are genetically identical to itself. This means that the number of offspring produced is limited compared to sexual reproduction.
Learn more about Asexual reproduction at:
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Plants use energy from sunlight, water, and carbon dioxide to produce sugar. Which structure is found only in plant cells and helps plants capture energy from sunlight?
A. vacuole
B. nucleus
C. chloroplast
D. cell membrane
Answer:
The Answer is C. Chloroplast
Explanation:
Chloroplasts are the organelle of photosynthesis. They capture light energy from the sun and use it with water and carbon dioxide to make food (sugar) for the plant. The arrangement of chloroplasts in a plant's cells can be seen in Figure below.
Question #14: In which scenario below would natural selection be most successful?
A.) All insects in a certain desert that have the same adaptation for saving water
B.) An island with lizards that all look alike and are all eating the same food
C.) A population of parakeets that have the same size beak
D.) A population of salmon with different skin colors that attract mates.
Answer:
the answer is d
........
Answer:
D) a population of salmon with different skin colors that attract mates
Without the process of translation, our cells would not be able to:
make DNA
make RNA
make amino acids
make proteins
Answer:
Make protein
Explanation:
Make protein by RNA
Species X and species Y are living animal species that have many similar physical characteristics. These characteristics suggest the species are closely related.
Which of the following would be the best evidence that species X and species Y have a common ancestor?
A.
A fossil of a different species is found that has some of the characteristics shared by species X and species Y.
B.
A fossil of a different species is found that has none of the characteristics shared by species X and species Y.
C.
A third living species is found that has none of the characteristics shared by species X and species Y.
D.
A third living species is found that has some of the characteristics shared by species X and species Y.
D, not pretty sure. ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ
Which molecule is produced in the aerobic breakdown of a glucose molecule?
A. Water
B. Oxygen
C. Light
D. Alcohol
E. NADPH
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E. NADPH
thankshope it helpspls mark as brainliestAnswer:
E
Explanation:
it enters the citric acid cycle and generates reducing equivalents in the form of NADPH
what type of organism is missing from the food web in question #8
Answer:
Algae
Explanation:
The series of membrane-bound channels between the nuclear and
cell membranes, serving as a cellular transport system is the
o plasma membrane
O nucleus
o endoplasmic reticulum
Answer:
C. Endoplasmic Reticulum.
Explanation:
The Endoplasmic Reticulum also includes ribosomes attached to the membrane and can produce protein.
I hope this helps you! :)
Nicole made the model shown below to represent the steps in the formation of a thunderstorm.
The diagram has six boxes. The first box on the top left has the symbol '?' in it, an arrow points from it, over to the left to a box with the text 'Meets coool air'; this box has an arrow pointing down from it to a box with the text 'Condenses'; this box has an arrow pointing to the left to a box with the text 'Clouds formed'; this box has an arrow pointing to the left to a box with the text 'Clouds grow bigger'; and this box has an arrow pointing down from it to a box with the text 'Precipitation'.
© 2010 FLVS
Which of these best fits the empty cell in Nicole's model?
warm, moist air rises
warm, dry air descends
water vapor condenses in clouds
water vapor evaporates from ocean
Answer:
The correct answer is - warms, moist air rises.
Explanation:
When moist warm air rises and meets with the surface of cool air the more dense air that is cold air end up below the warm moist air in the troposphere it condenses as it rises.
The condensation of the warm, moist water leads to the formation of cloud formation. This cloud gets bigger and bigger until it precipitates and rain fall occurs.
Answer:b
Explanation:took the test
A(n) is the general term for an infectious disease that has spread across a city, region, or country.
Answer:
epidemic
Explanation:
The situation in which a disease spreads over large area or effects a large population of people, the term used to denote is known as epidemic. The disease is caused for a short period of time. The disease is spread rapidly and the outbreak creates a havoc in the region. A particular country or area is infected by the epidemic. Pandemic refers to the spread of disease over many countries and continents. Epidemic when spreads to more countries it is termed as pandemic.
Answer:
Epidemic
Explanation:
Explain how depth of the ocean determines ocean topography.
Answer:
Currents and waves
Explanation:
Depending on the way that the currents are and the way the wind moves. This factor can change the way the graph determines depth.
what would happen if you gave your dog a tiny piece of chocolate?
Worth 32 points! Look in the picture
Help me right now! I need the answer in an paragraph please and I will make you brainlest!
NO WEBSITES or links or you will be reported. And don’t answer just to get points or you will be reported.
correct answer gets brainiest. and i’m telling u. if u guess or leave a link, ur getting reported and that’s not a threat
Answer:
Blood circulation
Explanation:
I'm pretty sure. Thank you.