A cross was made between two strains of plants that are agriculturally important. One strain was disease-resistant but herbicide-sensitive; the other strain was disease-sensitive but herbicide- resistant. A plant breeder crossed the two plants and then allowed the F1 generation to self- fertilize. The following data were obtained:
F1 generation: All offspring are disease-sensitive and herbicide-resistant
F2 generation: 157 disease-sensitive, herbicide-resistant
57 disease-sensitive, herbicide-sensitive
54 disease-resistant, herbicide-resistant
20 disease-resistant, herbicide-sensitive
Total: 288 Formulate a hypothesis that you think is consistent with the observed data. Test the goodness of fit between the data and your hypothesis using a chi square test. Explain what the chi square results mean.
Answer:
Hypothesis: Alleles assort independently from each other.There is not enough evidence to reject the null hypothesis.Explanation:
Due to technical problems, you will find the complete answer and explanation in the attached file.
The basic unit of structure and function of living things is the?
Answer:
cell units
Explanation:
Answer:
Cell is the basic structural and functional unit of life.
5. Besides being part of the composition of bone, why else do mammals need calcium?
Answer:
It's important for the contracting muscle
Explanation:
Besides being part of the composition of bones, calcium is needed by mammals for the following processes:
Formation of skeletons and teeth.Muscle contraction.Regulation of normal heart rate and nerve functions. Blood clotting. What is Calcium in living organisms?Calcium in living organisms may be defined as an important nutrient that all living organisms require, including humans in order to develop various organs like teeth and bones as well as for metabolic processes.
Apart from being part of the composition of bones, calcium is also required for the proper development of teeth and skeletons. The movement of calcium ions plays an essential role in the contraction of muscles.
The influx of calcium ions into the cells of the heart significantly enhances the heart rate of an individual in the range of 1.6 to 14.10 mm.
It also plays a critical role in blood clotting.
Therefore, it is well described above.
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The following graph shows the rates of decay for four parent isotopes. Based on the graph, which parent isotope most likely has a half-life of 13 billion years?
A
B
C
D
Answer:
option c would be the right answer just analyzed the graph
A STRAND OF DNA IS 19% GUANINE. WHAT
PERCENTAGE IS CYTOSINE?
Answer:
28% cytosine
Explanation:Since cytosine and guanine are present in equal amounts, we can simply divide their sum by 2. 28% cytosine, and 28% guanine.
111. Sodium's atomic number is 11. What does this tell you about an atom of sodium?
a) It contains 11 protons.
b) It contains 11 neutrons.
c) Its atomic mass is double this amount.
d) It has 11 protons to lose in ionic bonds.
How did the plow change farming during the Neolithic
period?
The plow helped farmers control water and irrigate
crops, resulting in food surpluses.
The plow allowed most people to give up farming
and to take up other kinds of work.
O The plow turned soil quickly, allowing farmers to
plant crops more easily.
The plow was used by hunter-gatherers to
domesticate plants and animals.
Answer/C
Explanation:i got it right
Answer: its c on edg
Explanation: i got it right
A tree growing on a cliff is slowly growing its roots into the rocks and causing it to crack. What is this an example of? Why?
(28 Points)
Answer:
because the tree is merged into the cliff, so its because of erosion
Explanation:
HELPPP ASAP! TIMED! 10 MINUTES LEFTT! How is cold front formation different from stationary front formation?
A.Stationary fronts form between warm and cold air masses, while cold fronts form when a cold air mass advances
against a warm air mass.
B.Cold fronts form between two air masses that barely move, while stationary fronts form when a warm air mass is
trapped between two cold air masses.
C.Cold fronts form when a warm air mass moves over a cold air mass, while stationary air fronts form when a cold
air mass moves over a warm air mass.
D.Stationary fronts form when a warm air mass is trapped between two cold air masses, while cold fronts form when
a warm air mass moves over a cold air mass.
Answer: Stationary fronts form between warm and cold air masses, while cold fronts form when a cold air mass advances against a warm air mass. Cold fronts form between two air masses that barely move, while stationary fronts form when a warm air mass is trapped between two cold air masses.
Explanation:
Which type of mutation is shown in the following DNA sequence?
ACTGCA - AGTGCA
A. deletion
B. frameshift
C. substitution (point mutation)
D. insertion
Answer:
C) substitution
Explanation:
The first C base was substituted for a G base.
Looking at the following organisms and their diets, place them into a food chain. Make sure you have arrows that show the correct flow of energy.
Aardvark: omnivore diet
Ant: herbivore diet
Grass: autotroph
Hyena: carnivore diet
Answer:
Grass > Ant > Aardvark > Hyena
Explanation:
The grass is autotrophic, which means it can produce its own food It does so using water, carbon dioxide, and light energy from the sun. The organisms in this food chain rely on other organisms for food.
The ant is a herbivore that consumes the grass for energy. The aardvark consumes both plants and animals (omnivore), so it can consume the ants. The hyena is a carnivore, meaning it only eats animals, such as the aardvark.
what are the sections on chromosomes? genes or DNA?
Answer:
genes
Explanation:dna whatttt
Answer:
Each section of a chromosome that contains the code for the production of a particular protein is called a gene . Each chromosome is made from a single molecule of DNA, but when a cell is ready to divide, the DNA copies itself, then coils and condenses to form the chromosomes that we see in micrographs .
Explanation:
Select the correct answer.
Macy always thought there were only a few hair colors: blond, brown, and black. However, when she actually began looking around, she saw varying shades of these hair colors. What is a possible reason for so many different hair colors?
Answer:
My guess is that the answer is genetics
Explanation:
polygenic inheritance
GIVE 15 POINTS
Identify the image that doesn’t depict a reproductive strategy.
Answer:
The one which have leaves in it (3rd picture) doesn’t depict a reproductive strategy.
Answer: The three picture
Explanation: I literally just got done with the test and got it right.
Which type of force is a contact force?
A. Gravity
B. Electromagnetic force
C. Friction
D. Strong nuclear force
Friction is the answer
Answer:
Friction
A-P-E-X
Match each muscle of the scapular with the correct label.
Answer:
Explanation:
1. Supraspinatus
2. Subscapularis
3. Infraspinatus
4. Teres major
there are six classes of nutrients that must be considered when planning your diet: water, proteins, carbohydrates, fats, vitamins, and minerals. most foods or ingredients include more than one of the six basic nutrients. for example, although most people usually think of corn as containing carbohydrates, it is important to remember that a kernel of corn contains all six basic nutrients.
Match the words to the appropriate blanks in the sentences.
_______nutrients be synthesized by the human body, but are required for optimal functioning. Therefore. they must be Obtained from food. Omega-3 fatty acids are prime examples.
You consume macronutrients (water. proteins, carbohydrates, and fats) in large quantities as opposed to _________ which you consume in small quantities
_________ can develop very quickly when exercising in hot/humid weather conditions.
_________are also called 'body builders" due to their function within the body________ are the building blocks of proteins.
1. glucose and fructose
2. essential
3. incomplete
4. proteins
5. fat soluble
6. plant
7. amino acids
8.saturated fats
9. micronutrients
10. dehydration
Answer:
Essential nutrients cannot be synthesized by the human body but are required for optimal functioning. Therefore. They must be obtained from food. Omega-3 fatty acids are prime examples.
You consume macronutrients (water. proteins, carbohydrates, and fats) in large quantities as opposed to micronutrients which you consume in small quantities
Dehydration can develop very quickly when exercising in hot/humid weather conditions.
Proteins are also called 'bodybuilders" due to their function within the body. Amino acids are the building blocks of proteins.
Explanation:
Essential nutrients are those nutrients that are required for the proper functioning of the body but cannot be synthesized by the body. They are obtained from external sources such as vegetables or synthesized artificially in the laboratories. Micronutrients as the name implies are taken in small amounts. Examples are the different types of vitamins.
Dehydration occurs when a person loses a good amount of water through sweating or urination. It can easily occur while exercising in hot weather conditions. Proteins repair the cells in our body and are, therefore, rightfully referred to as bodybuilders. Amino acids form proteins.
I need help I already started on some of it but I am stuck please help I would appreciate it all you have to do is draw a line from one bubble to the other look at the picture for an example thank you so much!
here you go! hopefully you can tell which lines go where (also i crossed out on of the lines in white because it was wrong haha)
Marissa pedals her tricycle down the sidewalk. At what age was she likely first able to pedal? (2 points)
A.One year old
B.Two years old
C.Three years old
D.Four years old
Answer:
three years old i think. sorry if its wrong
moon phase that is half light and half dark
Answer:
Because a half of the half illuminated Moon can be seen, this is referred to as a "quarter Moon". When the Moon is waxing and reaches this position, it's called the "first quarter Moon"; when waning, the "third quarter Moon."
Orbits: Earth
Explanation:
Answer:
First Quarter Moon
Explanation:....
A plant growing toward the sun is an example of
Answer:
phototropism
Explanation:
Answer:
Hi Noya here! (◕ᴥ◕)
Explanation:
Phototropism is the term that describes the growth of a plant toward any light source. School-age children often demonstrate this principle by showing how a newly sprouted seed, for example, leans in the direction of a nearby light bulb. Heliotropism is the process that describes how a plant specifically tracks the sun’s movement across the sky.
-happy to help! ʕ·ᴥ· ʔ
What allows oxygen to create polar molecules?
Answer:
That the oxygen atom attracts electrons a little more strongly than hydrogen does. So even though the electrons from each atom are attracted by both the oxygen and the hydrogen, the electrons are a bit more attracted to the oxygen.
Can you identify the class of organic molecule to which these molecular structures and examples belong?Sort these items into the appropriate bins.
I SOLVED IT LOL
The correct class of molecules to which molecular structures and examples are:
Carbohydrates- starch and monosaccharide.Lipids - cholesterol and fatty acid moleculeProtein - amino acids and lactaseNucleic acids - DNA and nucleotide1. Carbohydrates:
Components: made of one or more monosaccharides.Functions: regulates energy for cell, energy storage, and plant cell support Examples: glucose, glycogen, starch and cellulose2. Lipids:
Components: fatty acid, glycerol, fat moleculeFunctions: energy storage, cell membrane components, and hormonesExamples: fats, phospholipids, and steroids3. Proteins:
Components: amino group, carboxyl group, R group, and amino acidFunction: enzyme, structural protein, transport, communication, immunity, storageExample: lactose, hair, tendons, muscles, hemoglobin, signal proteins, antibodies, egg albumin, receptor protein4. Nucleic acids:
Components: phosphate group, nitrogeneous base, ribose or deoxyribose, nucleotideFunctions: heredity Example: code for proteins, DNA, RNALearn more about macromolecules:
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Using this image as a reminder, which phrase gives two processes scientists think
move the Earth's lithospheric plates?
A. gravity acting on the edges of plates and friction between the plate and the asthenosphere
B. friction between the plate and the asthenosphere and pressure of magma on the
edge of the plate
C. gravity acting on the edges of plates and convection in the mantle
D. convection in the mantle and pressure of magma on the edge of the plate
Answer:
C. gravity acting on the edges of plates and convection in the mantle
Explanation:
A tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere. Therefore, the option (C) is correct.
What are lithospheric plates?Plate tectonics is the generally accepted scientific theory that considers the Earth's lithosphere to comprise a number of large tectonic plates which have been slowly moving since about 3.4 billion years ago.
Earth's crust, called the lithosphere, consists of 15 to 20 moving tectonic plates. The plates can be thought of like pieces of a cracked shell that rest on the hot, molten rock of Earth's mantle and fit snugly against one another.
In plate tectonics, Earth's outermost layer, or lithosphere—made up of the crust and upper mantle—is broken into large rocky plates. These plates lie on top of a partially molten layer of rock called the asthenosphere.
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1) Phloem is composed of two type of cells
2) Epidermal cells are
Answer:
1) Phloem is made of two types of cell parenchyma cells and schlerenchyma cells in adiition to it it also has sieve elements
2)The epidermis is the outermost cell layer of the plant body. Epidermal cells are tightly packed together thus provide mechanical strength and protection to the plant also helps in Transpiration and photosynthesis as it has special opening called stomatal openings
50 points and brainliest'!!!!!!!!!!!!!!!!!!!!!!!!
Reliability and probability in forensic tests are important. When you look at matching a paint chip to a specific car, you are working to increase the probability that the right car matching your paint chip evidence will be found. Reliability means you have practiced and applied the correct procedures and processes for all your evidence testing, and you know you can trust the results. Some forensic tests are more reliable than others, and the best type of test or tests to use will usually depend on the kind of evidence that is present. If all types of evidence were present at a crime scene, which type of test would you choose based on its reliability and probability of accuracy? Identify which test you would choose and provide a detailed argument as to why you feel it has a high level of reliability in comparison to other types of evidence. Your answer should be at least two paragraphs in length and should include solid arguments for your choice. There is no wrong choice, just be sure to provide a convincing argument.
Answer:
Explanation:
everything must match up inorder to find anyone accountiable
Why is soil erosion important to agriculture?
Answer:
because without soil we wouldn't be able to grow our food.
How is energy stored in the ATP molecule?
O in the chemical bonds holding the nitrogen base together
O in the chemical bond holding the sugar to the nitrogen base
in the chemical bonds holding the sugar molecule together
O In the chemical bonds holding the phosphate groups together
What are the four main parts of a plant?
Answer:
Roots, stem, leaves, flower
Explanation:
A reduction of the amount of product of a particular gene is observed due to a mutation. This type of a mutation is called ____