Why do scientists use light-year instead of Astronomical Units to measure the distances between stars?
Answer:
well AU is only for inside a star system and the number of AU would be too high, so light years are easier its like saying ur 6 feet instead of 72 inches or in centimeters
Explanation:
!!!!!!HELP PLS I NEED ASAP ITS TIMED
Answer:
in order going from the top to the bottom.
water is compound composed of three atoms
- 1 Hydrogen, 2 oxygens
Cohesive
Because water is a polar molecule it is a good solvent
sweating can have a cooling effect due to evaporation. this is becayse energy is needed to break waters hydrogen bonds.
Frozen water is less dense than liquids water causing ice to float
Explanation:
____ muscle is voluntary and straited; _____ muscle is involuntary and non striated?
Answer:
Skeletal muscle is voluntary and striated, cardiac muscle is involuntary and straited and smooth muscle is involuntary and non-striated
Explanation:
hope it helps :)
Answer: Skeletal; cardiac
-Smooth muscle is involuntary and non-striated.
Explanation: Hope this helps, have a great day :D
The pedigree traces red-green color blindness.
Lisa and Monica are half-filled circles. Sam, Bella, Joshua, and Tim are filled-in shapes.
Which family members have red-green color blindness?
Answer:
The correct answer is - Tim, Sam, Bella, and Joshua.
Explanation:
The human pedigree shows the particular trait in which is inherited in a family across different generations. In such pedigree, there are some signs that are used to express such as blank shapes represents normal individual, half-filled shapes represents a carrier individuals, and complete or fully filled shapes represent the affected individuals.
Lisa and Monica are half-filled circles which means they are carriers for the disease. Sam, Tim, Bella, and Joshua have filled-in shapes in the illustrated pedigree. Which means they are affected by the disease.
Answer:
Sam, Tim, Bella, and Joshua
Explanation:
I got it right
What is water current so
A plants normal cell contains 24 chromosomes. How many would you predict it's
sperm cell (aka pollen) to have?
O 36
O 24
12
48
Direction: Determine if the following mixture is a colloid or not. Write
C if colloid and N if it is not. Write your answers in your answer sheet
1. Margarine
2. Mayonnaise
3. Toothpaste
4. Smoke
5. Cough syrup
6. Smog
7. Vinegar
8. Cake
9. Soy sauce and vinegar
10. Soft drinks
Before Going To Solve This Problem let's know about what is Colloids
→ Colloids are heterogeneous mixture in which the size of particles are too small and can't be seen with naked eyes.
→ The particles of colloid can be pass through filter paper.
(1) Margarine
Ans:- Yes, margarine is colloids .
(6) Smoke
Ans:- Yes , Smog is colloids.
(2) Mayonnaise
Ans:- Yes, mayonnaise is colloids.
(7) Vinegar
Ans:- Yes, Vinegar is not colloids.
(3) Toothpaste
Ans:- Yes, Toothpaste is colloids.
(8) Cake
Ans:- Yes, Cake is Colloids
(4) Smoke
Ans:- Yes, Smoke is colloids.
(9) Soy sauce and Vinegar
Ans:- Yes, Soy sauce and Vinegar is colloids.
(5) Cough Syrup
Ans:- No, It is not colloids . It is suspension .
(5) Soft Drink
Ans:- No, it is not colloids .
Which test tube in the experiment best represents a normal stomach?
A. Protein + hydrochloric acid
B. Protein + pepsin
C. Protein + pepsin + hydrochloric acid < (I think?)
D. Protein + water
Which of the following is a primary source?
O Annotated bibliography
O Encyclopedia
O Diary
O Literature review
Answer:
A diary is a primary source
Which describes how the atoms in living things cycle?
Multiple choice question.
A)
through living parts of ecosystems only
B)
in one direction from living to nonliving parts of the ecosystem
C)
in one direction from nonliving to living parts of the ecosystem
D)
repeatedly back and forth through living and nonliving parts of the ecosystem
Answer:
D) repeatedly back and forth through living and nonliving parts of the ecosystem
Explanation:
Matter is contained in both living and non-living components of the Earth. An atom is the smallest indivisible component of every matter. This means that matter is made up of atoms.
In an ecosystem, organisms feed on one another in order to survive. However, as they do this, matter is transferred from one organism to another. This transfer of matter (atoms) occurs repeatedly repeatedly back and forth in a cyclical manner through living and nonliving parts of the ecosystem.
Because of a snowstorm, your regular laboratory session was cancelled and the gram staining procedure performed on cultures incubated for a longer period of time. Examination of the stained B. cereus slides revealed a great deal of color variability, ranging from an intense blue to shades of pink. Account for this result.
Answer:
Bacteria start to die, thereby changing the dye concentration in the medium and producing different colors
Explanation:
Bacillus cereus are Gram-positive, rod-shaped bacteria that form orange-pink colonies in agar media (e.g., BACARA medium, which is used for detection and enumeration of B. cereus). In this case, it is expected that after a long time without taking care of the culture, the bacteria started to die. Subsequently, lysed bacterial cells lost their dye which accumulated in some areas of the medium, thereby showing different colors ranging from an intense blue (areas with dead bacteria) to shades of pink (areas with bacteria still alive and viable).
The color of some colonies are changing bacause of long incubation due to death of bacteria.
Bacara agar medium:
It is used for detection and enumeration of B. cereus. Bacteria gives orange-pink colonies in the media.
This detection method only detects the live bacteria, but here bacteria are dieing because of lake of food in media.
Therefore, the color of some colonies are changing bacause of long incubation due to death of bacteria.
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Which organelle serves as Cell City's police? (This is an analogy)
A) ER (Endoplasmic Reticulum)
B) Golgi Complex
C) Lysosome
D) Chloroplast
Answer:Lysosomes
Explanation:
LIST THREE NATURAL PROCESS THAT AFFECT THE ECOSYSTEM
Answer:
1.)Ecological Succession
2.)carrying capacity
3.)population shocks
Explanation:
What is the frequency of this wave?
2
03
4
Answer:A 1 or 2
Explanation:
Answer:
Irregular because of lines passing each other
the process of taking gaseous carbon dioxide or oxygen by leaves is termed
Answer:
photosynthesis
as in the process of photosynthesis plants take in carbon dioxide and give out oxygen.
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The process of taking gaseous carbon dioxide or oxygen by leaves is termed peristomal diffusion or diffusion through stomata present on leaves.
Plants take up carbon dioxide or oxygen from the air through their leaves as they have several stomata on their surface. The small holes or openings in the underside of the leaf are called stomata.
Diffusion through stomata also helps oxygen, produced in photosynthesis, to leave the leaf.The diffusion of gaseous carbon dioxide or oxygen is proportional to the concentration difference between the atmosphere and leaves.The loss of water vapor in transpiration also occurs through stomata.peristomal diffusion or diffusion through the leaves allows the gaseous exchange.Thus, the correct answer is - peristomal diffusion or diffusion through stomata present on leaves.
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The female sex organ of the ferns that produce an egg cell is called?
The second generation of a purebred cross of a h.o.m.o.zygous recessive organism, with a h.o.m.o.zygous dominant organism, contains a ratio of approximately ____ expressed dominant traits to recessive traits.
a. 1:1
b. 1:3
c. 2:1
d. 3:1
Answer:
d. 3:1
Explanation:
A purebred organism is an organism that contains identical alleles for a particular gene e.g rr or RR. According to this question, in a cross between a purebred dominant organism e.g RR and a purebred recessive organism e.g rr, each parent will produce R and r gametes respectively.
Using the gametes in a punnet square (see attached image), a heterozygous organism (Rr) will be produced in the F1 generation. If these heterozygous organism is self-crossed i.e. Rr × Rr, the following F2 offsprings will result;
RR, Rr, Rr, and rr.
RR, Rr and Rr will exhibit dominant traits while rr will exhibit recessive traits. This means that the F2 generation contains a ratio of approximately 3:1 expressed dominant traits to recessive traits.
Answer please! have a great day/night
Answer:
C= gene
U too have a great day/night.
Explanation:
The eye color of children often resembles the eye color of their parents. Which of the following is genetically passed from parents to children?
A. Particles of color are passed from parents to children.
B. Cells that become the colored part of the eye are passed from parents to children.
C. Nothing having anything to do with eye color is passed from parents to children.
D. Molecules (DNA) that contain the information that determines eye color are passed from parents to children.
Answer:
D
Explanation:
It is transferred as heredity.
Molecules (DNA) that contain the information that determines eye color are passed from parents to children.
Parents pass there genes to there offspring which helps in determining there phenotype.What are genes?A gene is the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins. Many genes do not code for proteins.What are proteins?A protein is a naturally occurring, extremely complex substance that consists of amino acid residues joined by peptide bonds. Proteins are present in all living organisms and include many essential biological compounds such as enzymes, hormones, and antibodies.
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Give 3 examples of aseptic techniques when pouring agar plates
Answer:
preparation, environmental controls, and contact guidelines
Explanation:
Guys hurry what is genotype and what is phenotype
Answer: Phenotype= the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.
Genotype= In a broad sense, the term "genotype" refers to the genetic makeup of an organism; in other words, it describes an organism's complete set of genes. Humans are diploid organisms, which means that they have two alleles at each genetic position, or locus, with one allele inherited from each parent.
Explanation:
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What is a basement membrane
Answer:
which are present in the cell
Explanation:
of body in the base of kidney
In a typical barrel of oil, roughly what percent will be refined into gasoline?
5
10
15
20
25
Answer:
20%
Explanation:
A farmer decides to test whether or not a fertilizer will make her crops grow bigger. In year 1, she plants corn in two different fields on her property and fertilizes one and not the other. She measures the height of 10 corn plants in meters from each field. She takes her measurements every week for three months. In year 2, she puts irrigation in one of the fields and conducts the same experiment.
Required:
a. What is the independent variable and the treatments (increments) used in the experiment?
b. What is the dependent variable and the units in which it was measured?
c. Name at least two controlled variables:
d. What is the hypothesis?
e. Identify two sources of error in the first year in the experiment:
f. Identify two sources of error in the second year in the experiment:
Answer:
a. independent variable: the fertilizer.
treatments: the use of fertilizer in one of the fields.
b. dependent variable: the crop growth in height.
units: meters
c. two controlled variables: soil pH / solar-radiation exposure, and water supply
d. hypothesis: the fertilizer makes the crops grow bigger.
e. two sources of error in the first year:
the researcher might plant the two crops under different conditionstake wrong measures of the height of the cornsf. two sources of error in the second year:
she can fail in irrigating the crops climatic and environmental conditions might change and have different consequences on each of the fields (this source affects the results influencing the growth of the plants).Explanation:
Independent (manipulated) variable: Refers to all the variables in an experiment that provoke a response in another variable. An independent variable is the one that changes or is controlled and modified in the experiment to analyze how another variable responds to it. These changes allow analyzing its effects on the dependent variable. Usually, the independent variable is represented by the X letter. In the exposed example, the fertilizer is the independent variable. Treatments: Refers to the experimental procedure applied in the experimental group. In this example, the use of fertilizer is the treatment. Here the experimental group (the one that receives the experimental procedure, with changes in the independent variable) is the fertilized field. Data from the experimental group is compared with the data from the control group, to analyze the effects of the fertilizer.Dependent variable: The values of these variables respond to any change in the independent variable. It represents the quantity of something. The change in the dependent variable might be proportional or inversely proportional to the change in the manipulated variable. It is usually identified by the letter Y. In the exposed example, the crop growth rate in height is the dependent variable, that depends on the fertilizer used in that field. The units in which the crop is measured are meters in height. Controlled variable: Refers to those variables equally applied to every group or subject in an experiment and have no influence on the results. These variables do not affect the change in the dependent variable values. In the exposed example, soil pH and solar-radiation exposure can be two controlled variables, as they must be equal for both fields. Water supply by irrigation ducts during the second year in both fields is also a controlled variable. Hypothesis: A hypothesis is a possible answer for a question, a speculation that is not verified yet and requires corroboration. A hypothesis must express what is expected to occur in a perfectly comprehensive manner. It must be objective and directly related to variables. In this example, the hypothesis might be that the fertilizer makes the crops grow bigger. Errors: These are the differences between the observed data or taken values and what is really happening in nature, which can lead to a misinterpretation of what is actually going on. These errors might be systematic mistakes performed by the researcher when measuring, taking data, applying the treatment, etc. Or they might be due to random errors, which are due to failures in the instrumentals, changes in the environment, a single mistake of the researcher while taking measures, among others. During the first year, the researcher might plant the two crops under different conditions (parcels with different slopes which affect solar-radiation) or might commit a mistake while applying the fertilizer (different concentrations for example), or might take wrong measures of the height of the corns. During the second year, she can fail in irrigating the crops correctly, providing more water to one of the fields. She can commit the same measuring mistakes. Or even climatic and environmental conditions might change and have different consequences on each of the fields.identify the missing parts of the carbon cycle photosynthesis burning oil and coal respiration decomposers
Answer:
Carbon is part of our bodies, but it's also part of our modern-day industries. Carbon compounds from long-ago plants and algae make up the fossil fuels, such Deeper under the ground are fossil fuels such as oil, coal, and natural gas, When humans burn them, carbon is released into the atmosphere as carbon dioxide.
Explanation:
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1.The illustration below shows that sexual reproduction involving two parent pea plants resulted in the production of four offspring.
A. All four offspring received all of their genetic information only from Parent 1 and are therefore identical to that parent
B. All four offspring received all of their genetic information only from Parent 2 and are therefore identical to that parent.
C. All four offspring are genetically unique and did not receive any of their genetic information from either parent.
D. Each of the offspring is genetically unique and received some of its genetic information from each parent, so each has some traits in common with each parent.
Answer:
C
Explanation:
Because of the x and y chromosomes and they split apart and that's how you get 4 offspring.
The fusion of two different gametes leads to the formation of new offspring is called reproduction. There are two types of reproduction that is sexual and sexual.
The correct option is A
The branch of biology which deals with the study of genes is called genetics. there are two types of alleles that give all the character to the phenotypes. The dominant allele is the allele that suppresses the recessive allele and shows its effect.
In question, the F1 generation shows only one type of character which belongs to parent 1 because that is the dominant allele.
Hence, the correct option is A that is all four offspring received all of their genetic information only from Parent 1 and are therefore identical to that parent
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A pea plant with round seeds (RR) is crossbred with another pea plant with wrinkled seeds (r).
What is the probability of producing offspring with genotype Rr?
25%
50%
75%
100%
Answer:
100%
Explanation:
A border collie breeder raised border collies for herding cattle. She has 50 dogs, and lets them breed randomly. She has noticed that some of her puppies are being born with blue eyes. None of her parents have blue eyes. Out of 150 puppies born this year, 35 had blue eyes which is a recessive trait. How many of the other puppies are likely to be carriers of the gene?
Answer:
20?
Explanation:
What are the correct genotype percentages?
OGG=25%, Gg=50%, gg=25%
O GG=0%, Gg=100%, gg=0%
GG= 75%, Gg=0%, gg=25%
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Which of the following are considered to be selective pressures that increase competition for survival within a species?
A) Lack of predators
B) Lack of food
C) Poverty
D) Extreme climate conditions
E) Lack of mates
F) A new habitat for shelter