Answer:
B. 160 has 8 neutrons, whereas 180 has 10 neutrons.
Explanation:
The proton of an element is also known as the atomic number. Oxygen has an atomic number of 8 and also a proton of 8. Neutron is however calculated by the subtraction of the mass number from the atomic number (proton).
This results in 160 having 8 neutrons because the mass number(16) is subtracted from the atomic number to give 8 neutrons, whereas 180 has 10 neutrons as a result of the mass number 18- the atomic number(8) to give 10.
Answer:
160 has 8 neutrons, whereas 180 has 10 neutrons.
Explanation:
Apeks approved
A monophyletic group or clade consists of single ____ and all of its descendants.
a monophyletic group or clade consists of single organisms and all of its descendants
Sequence the steps, 1–4, in the order required to create a permanent slide of human cheek cells. [1 mark] Specimen dehydrated Specimen embedded in wax Specimen cut into thin 'sections' Staining
Answer:
The correct order is dehydration, embed in wax, cut into sections, staining
Explanation:
There are certain proceedings needed to obtain stained sections of vegetable or animal tissues for their microscope observations.
These steps are:
Obtention of the material: The tissue is cut to an adequate size.Fixation: When tissues are extracted from the organism, they suffer autolysis and putrefaction, so they need to be fixated in order to keep their cells in the best state possible. Fixation involves preserving the original morphological and molecular characteristics of the tissue. Fixation avoids autolysis, putrefaction, distortion, and retraction of cells and the tissue that could affect its volume or morphology. Dehydration. Once fixated, the fixator must be eliminated and the tissue is dehydrated by using a gradual series of solutions with alcohol in ascendant concentrations. Dehydration must be gradual to avoid tissue deformation. Inclusion. To obtain thin cuts that can be observed under the optic microscope, the tissues must be included in a consistent, firm substance, that might be either hydrophilic or hydrophobic. A hydrophobic medium is paraffin wax, that provides hardness and plasticity. Cut. The tissue included in wax must be cut in slides or sections thin enough to allow the diffusion and penetration of light. A microtome is used to perform these cuts. When using paraffine for tissue inclusion, the cuts are about 5 to 20 micrometers of thickness. Stain. Once the cuts are performed, paraffin wax must be eliminated. This can be done by using an organic solvent. Then the tissue must be stained. Hematoxylin and Eosin are the most common dyes. Animal tissues in general do not have any natural color, so they need to be stained to be observed.In the diagram, the feature labelled C is only found in plant cells. What is it called?
Answer:
Should be the Chloroplast
Explanation:
Since its green and only plants have it, the way they produce energy is using Chloroplasts..
In the diagram, The cell organelle labeled as c is the chloroplast
The plant cell contains structures that are cell walls, chloroplast, vacuoles that are absent in an animal cell.
Reason:
cell wall present on the outside of the plasma membrane labeled as Evacuoles are the single but largest cellular structure in the plant cell and are present in the center.Chloroplasts:
The chloroplast is an organelle found in plants and other photosynthetic organisms.The chloroplast contains chlorophyll that gives the plant its green color.Chloroplasts capture light energy to conserve free energy in the form of ATP and reduce NADP to NADPH through photosynthesis.The chloroplasts also have a double outer membrane. chloroplasts are minute flattened granules.Thus, In the diagram, The cell organelle labeled as c is the chloroplast
A silver mine recently opened along the foothills of a mountain. The mine's primary method for extracting silver from the surrounding rock is heap leaching. Which of the following hazards does this process most likely pose to the environment?
I. Atmosphere contaminated with heavy metals
II. Soil contaminated with cyanide
III. Surface water contaminated with sediment
Answers:
I only
II only
III only
I and II only
Soil contaminated with cyanides is the hazard which is the most likely pose to the environment. Thus, the correct option is B.
What is Cyanide contamination?Silver mining is the extraction of silver metal from minerals, starting with mining. Because of this silver, which is often found in the intimate combination with other metals, its extraction requires more elaborate and complex technologies.
Cyanide in the landfills can contaminate the underground water. Hydrogen cyanide, sodium cyanide, and potassium cyanide are the major forms of cyanide which are most likely to be found in the environment as a result of industrial activities. Hydrogen cyanide is a colorless gas with a faint, bitter, almond-like odor. Concentrated acids and cyanides are used to dissolve metals from the rock which are picked up in rainwater.
Therefore, the correct option is B.
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Which describes the average velocity of a unicycle going around in circles?
O A. The total displacement divided by the time.
B. The average acceleration divided by the time.
O C. Every time the unicycle returns to its starting point, the average
velocity equals zero.
O D. The slope of the acceleration vs. time graph.
____ behaviors rely on prior practice or experience?
Answer:
Learned behaviors
Explanation:
Learned behavior is where one develops from experience.
Answer:
Insight
Explanation:
Insight involves the use of previous experience or memories to react to a new situation.
Which process is part of protein synthesis and includes tRNA
Answer:
Translation
Explanation:
The step of the scientific method where an if/then statement is developed is referred to as Question 2 options: identifying variables. stating a problem. making observations. formulating a hypothesis.
Answer:
formulating a hypothesis.
Explanation:
Biologists and other scientists alike make use of a logical problem-solving approach to tackle scientific issues. This approach is referred to as scientific method. Scientific method comprises of steps used in tackling scientific problems.
The steps are as follows: Make an observation, ask a question, formulate a hypothesis or testable guess answer, make a prediction based on the hypothesis, test the prediction.
-Firstly, an observation to detect a scientific problem is made.
-Then a question is asked based on the observation made.
-Next, a potential answer in form of an if/then statement is provided. This answer can be tested to see the chance of being correct. This statement is called a hypothesis.
Answer: Formulating a Hypothesis
Explanation:
The hypothesis is written in an if/then statement. The hypothesis formulation step comes after making observations, stating the problem, and identifying variables.
A particular population of chickens has a frequency for the dominant allele as 0.70 and a frequency for the recessive allele as 0.30. Which expression is the correct way to calculate the frequency of individuals that are heterozygous?
Answer:
the frequency of heterozygous = 2 *0.7 * 0.3
Explanation:
What can you do to prevent or lessen the generation of hazardous wastes?
Which of the following best explains why soil conservation is important to human agriculture? a. Erosion prevention prevents millions of dollars in damage from mudslides. b. It is easier to prevent the degradation of old soil than it is to generate new soil. c. If the soil salinity gets too high crops will not be able to grow in it. d. Soil contamination is a hazard to human and animal health. Please select the best answer from the choices provided A B C D
Answer: It is easier to prevent the degradation of old soil than it is to generate new soil.
Soil conservation is important for human agriculture because it is easier to prevent degradation of old soil than to generate new soil.
What is soil conservation?Soil conservation is a set of agricultural principles and techniques aimed at the proper management of arable land, preventing erosion in all its forms. Its objective is to make the most of the land per unit of planted area. Thus, the physical, chemical and biological degradation of the soil is avoided.
With this information, we can conclude that soil conservation is important for human agriculture because it is easier to prevent the degradation of old soil than to generate new soil.
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Which term best summarizes the process of self-feeding?
O A. Digestion
O B. Photosynthesis
O C. Homeostasis
O D. Predation
Giraffe necks and mice necks have the same number of vertebrae, despite their different sizes and functions. This is an example of a(n) ____.
Answer:
differences
Explanation:
What does the length of a vector arrow represent?
O A. magnitude
ОО
O B. angle
O c. force
O D. direction
Answer:
Bottom line is "the length of a vector arrow is a scalar quantity representing how long (or short) the arrow is .
Explanation:
The length of a vector is also know as the magnitude. The magnitude determines how quickly something is moving through space whereas the direction tells you where the vector is going. hope this helps you :)
Answer:
A. magnitude
Explanation:
Magnitude is just another word for "size/length." You will typically see vectors often appear in physics and levels of math starting from pre-calc.
Red-green color blindness is an X-linked recessive disorder.
Answer:
The most common type of red-green color perception defect is due to a mutation on the X-chromosome (i.e. a red-green color blind allele). X-linked red-color blindness is a recessive trait. Females heterozygous for this trait have normal vision. ... The dominant X chromosome is represented as XR.
Explanation:
Two species of fish had recently undergone sympatric speciation. The males of each species had a different coloring through which females could identify and choose a partner from her own species. After some time, pollution made the lake so cloudy it was hard for females to distinguish colors. What might take place in this situation?
Answer:..............
Explanation:
Neptune has a diameter of 30,778 miles. What is its diameter in kilometers?
(1 mile = 1.6 kilometers)
A. 1,392,650 km
B. 120,586 km
C. 12,761 km
D. 49,225 km
Explanation:
30 778×1.6
=49 244.8Km
humans and plants have the same type of cells?
Answer:
No.
Explanation:
Humans have animal cells and plants have plant cells.
Human cells have centrioles, while plants have chloroplast.
Hope this helps!
The parts of the corn embryo are often difficult to see clearly in the cut kernel. However, prepared slides clearly show the epicotyl, hypocotyl, radicle and plumule. • Why is this important to the plant embryo? Examine various stages of the germination of both beans and corn shown in the course. What similarities and differences do they have? • Corn • Bean
Answer:
i think this question is wrong
Explanation:
i cant understand anything
sorry
uculating the Perimeter of a Triangle
GO
y
Triangle ABC is an isosceles triangle in which side
AB = AC. What is the perimeter of triangle ABC?
5
4
O 5+ 10 units
3
2
O 10 + 10 units
1
2
10/10 units
2.
3
- 5 4 -3 -2 -1
-1
4
5
O 50 units
B
-2
А
c
-5
Answer:
10 + √10
Explanation:
Assume your triangle is like the one below.
The coordinates of the vertices are
A = (-2,-4), B = (-2,-1) A = (-2,-4)
1. Calculate AC
AC = 3 - (-2) = 3 + 2 = 5
2. Calculate AB
AB = AC = 5
3. Calculate BC
We can use the Pythagorean theorem:
BC² = BD² + CD² = 3² + 1² = 9 + 1 = 10
BC = √10
4. Calculate the perimeter
p = AB + AC + BC = 5 + 5 + √10 = 10 + √10
what is the Mid-Atlantic Rift
someone please calculate the ratio of offspring please help pleaseeeeeeeeeeeeeeee
Answer:
2. 1 Pink : 1 white
3. 1 Red : 1 Pink
4. 1 Red : 2 Pink : 1 White
Explanation:
This question involves a single gene coding for flower colour in snapdragon plants. The alleles of the gene exhibits incomplete dominance i.e. the red allele (R) ia not completely dominant over the white allele (W), hence an intermediate pink phenotype (RW) is formed. Based on this, a red snapdragon will have genotype, CRCR while a white one will have genotype, CWCW. The intermediate pink phenotype will have a genotype, CRCW.
The image attached to this question shows four crosses between different traits.
In the second cross between a pink (CRCW) and white offspring (CWCW), 2pink and 2white offsprings will be possibly produced in the ratio 1:1.
In the third cross between a red (CRCR) and pink (CRCW) snapdragon, 2 red and 2 Pink offsprings will possibly be produced in a ratio 1:1.
In the fourth cross between a pink (CRCW) and pink (CRCW) snapdragon, red, pink and white offsprings will be produced in the ratio 1:2:1.
See attached image for the complete punnet square. Note that, there was a mistake in the Genotype of the last cross i.e. pink has genotype CRCW not CWCW.
Look at the structure in the picture below. What function does this structure have? A. To see the outside world B. To hear the outside world C. To taste food D. To move around
Answer:
C. To taste food
Explanation:
the mouth is from where living organisms take food in.
What are two reasons scientists use shared traits to classify organisms?
O A. Because observing the traits is easier than comparing the genes
that cause them
O B. Because the scientific names of organisms depend on the
amount of DNA they have
O C. Because having similar traits shows that organisms have similar
DNA
O D. Because shared traits can be used to make dichotomous keys
SUBMIT
Answer:
C. Because having similar traits shows that organisms have similar
DNA and D. Because shared traits can be used to make dichotomous keys
Explanation:
I'm pretty sure these are the right answers. The other two choices seemed off.
Two reasons scientists use shared traits to classify organisms are that observing the traits is easier than comparing the genes that cause them, which is option A, and shared traits can be used to make dichotomous keys are two reasons scientists use shared traits to classify organisms.
What is dichotomous keys ?Shared traits are useful in classifying organisms for several reasons as they provide a way to group organisms that share similar characteristics, which can help scientists understand relationships between species. Shared traits can be used to make dichotomous keys, which are tools that help identify organisms based on their physical characteristics. While shared traits may not always indicate a close genetic relationship, they can provide clues about the evolutionary history of organisms.
Hence, two reasons scientists use shared traits to classify organisms are that observing the traits is easier than comparing the genes that cause them, which is option A, and shared traits can be used to make dichotomous keys are two reasons scientists use shared traits to classify organisms.
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Decomposers are heterotrophic organisms and not autotrophic organisms because they
A: live in soil where sunlight cannot reach
B: are consumers obtaining energy from dead or decaying organic matter
C: recycle materials back to the soil for re-use by plants
D: are classified by how they get energy using photosynthesis
Answer:
The answer is option A
Hope this helps
Answer:
B
Explanation:
Heterotrophic means that the organism cannot produce its own food, so B shows that decomposers are obtaining energy from other sources, making it a heterotroph.
Based on the image what would an observer see at Location A? ------------------------
(A).partial lunar eclipse
(B).partial solar eclipse
(C)total solar eclipse .
(D)total lunar eclipse
At the location A, the moon is between sun and earth. Hence, the shadow of moon partially hide sun from that region. Therefore, we can observe partial solar eclipse at location A.
What is solar eclipse ?Solar eclipse is a spatial phenomenon where, the sun is eclipsed by moon when moon comes between sun and earth. The sunlight to the earth is hindered by the moon and a shadow comes in that region of earth.
The moon only casts the outermost portion of its shadow, known as the penumbra, on earth during a partial solar eclipse because the Sun, moon, and earth are not precisely lined up in a straight line. This appears to be the sun being bit into by the moon from our vantage point.
On occasion, the moon just partially obscures the sun's disc. Sometimes a partial eclipse can be mistaken for a total one. eclipse magnitude is a measurement of the eclipsed area's size. Hence, option B is correct.
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Use your calculated discharge results to estimate the probability of flooding, using the following procedure: 1. Use the Annual Exceedance Probability Chart below (also in the Chapter 16 Investigation in your textbook or on the worksheet that corresponds to this exercise). Find the position of your calculated discharge to fill the notch on the vertical axis of the plot. 2. Draw a horizontal line from that value to the right until you intersect the probability line. 3. From the point of intersection, draw a vertical line down to the horizontal axis of the plot, read off the corresponding probability of exceedance, and choose the best answer below. The probability to fill the notch is: Now determine the probability of flooding of the middle terrace, using the same approach as before. Remember you must use the total amount of discharge required to fill the notch and bottomland up to the level of the middle terrace. Choose the best answer below. The probability of flooding the middle terrace is:
Answer:
1) The probability to fill the notch is greater than 95%
2) The probability to fill the middle terrace is 5 to 25 percent
Explanation:
1) The calculated discharge, [tex]D_{ca}[/tex], to fill the notch is given by the relation;
[tex]D_{ca}[/tex] = Width × Depth × Velocity = 8 × 5 × 0.5 = 20 m³/s
From the Annual Exceedance Probability chart, the exceedance probability is greater than 95%, therefore, the probability to fill the notch is greater than 95%
2) The calculated discharge, [tex]D_{mt}[/tex], to fill the middle terrace is given by the relation;
[tex]D_{mt}[/tex] = Width of middle terrace × Depth of middle terrace × Velocity of middle terrace + [tex]D_{ca}[/tex] = 35 × 2 × 1.4 + 20 = 118 m³/s
From the Annual Exceedance Probability chart, the probability to fill the middle terrace is 5 to 25 percent.
Which of the following would not reduce the carrying capacity of an ecosystem for a particular prey species? a. drought b. fewer primary producers c. habitat destruction d. fewer predators
Answer:
Fewer Predators
Explanation:
.
The only thing that would not reduce the carrying capacity of an ecosystem for a particular prey species is fewer predators, which are present in Option D, as the carrying capacity refers to the maximum number of individuals present in the ecosystem.
What is carrying capacity?Various factors can affect the carrying capacity of an ecosystem for a particular prey species, such as drought and habitat destruction, which can decrease the availability of resources such as food, leading to a reduction in the carrying capacity of the ecosystem, which can result in a decrease in plant growth and food availability for herbivores, which in turn reduces the carrying capacity for predators.
Hence, the only thing that would not reduce the carrying capacity of an ecosystem for a particular prey species is fewer predators, which are present in Option D.
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Explain why the pH stays the same no matter how much water is in the beaker.
Answer:
pH is based upon the liquid's composition and not the amount inside. If something was added this would change it, but it will always stay at a perfect 7 :)
Explanation:
Mark as brainliest please ill give u a cookie
Answer:
Because water is a natural buffer.
Explanation:
Buffer means the pH doesn't change when more of it is added.
Hope it helps.
Several bodily responses are described below. For each response, determine what caused the change in homeostasis.