Answer: The study of plant varieties.
Explanation:
This question relates to the studies that Gregor Mendel, founder of modern genetics, performed at the University of Vienna.
Experimenting on pea plants, Gregor Mendel was able to establish a lot of the rules of heredity that we know today even though his research was not fully appreciated or understood during his own life.
He credited the study of plant varieties to have been most crucial to his final analysis because farmers had been crossbreeding varieties for millennia to bring about better traits in plants.
which term describes a pure substance that made up of only one type of atom
Answer:
Element
Explanation:
In chemistry, two substances are referred to as PURE SUBSTANCES. One of the pure substances is ELEMENT and the other is compound. An element is a pure substance that contains only one type of atom.
In an element, only one type of atom makes up the structure. For example, H2 (hydrogen) and O2 are examples of elements because they contain only hydrogen and oxygen atoms respectively
Even though chestnuts can regrow from their roots, this does not usually happen because
there are few root systems left in the forest.
chestnuts grow in regions prone to fires.
most forestry professionals no longer want to grow chestnuts.
new growth is stricken with the blight before it has the chance to mature.
Answer: New growth is stricken with the blight before it has the chance to mature.
Explanation:
American Chestnut trees can indeed regrow from their roots but due to the devastating effect of the chestnut blight, they have been unable to do this since the blight spread across the country.
The blight was introduced when Chinese chestnut trees were imported into the U.S. in the 20th century. It killed off most of the chestnut trees in the U.S. and attacks the tree again when it grows to around 6 meters bringing it down to its roots. This is why the American Chestnut is considered endangered.
Answer:
d
Explanation:
took the test
Two parents have three kids. Each kid looks very different physically. What is responsible for this outcome?
Answer: This may mean that the mother has been seeing people and the kids don't have the same dad or They don't really have a lot of their parent's genes.
Explanation:
really the only options I can think of.
What are the important plants in agriscience?
Answer: Major grain crops are corn, wheat, barley, oats, rye, rice, sorghum, and soybeans. Less than 10 percent of the corn grown in the U.S. is for human consumption. Legume plants such as dry beans and peas are important foods in the diet of many Americans and people around the world.
Explanation:
Match the descriptions with the correct phases of the ovarian cycle - progesterone levels are highest during this phase - menses occurs during the first part of this phase - LH levels peak during, or just before, this phase - This phase occurs approximately 14 days before the onset of menstruation - GnRH secretion is inhibited by estrogen secreted from the corpus luteum during this phase - This phase corresponds to the secretory phase of the uterine cycle - A follicle ruptures during this phase - The antrum of a follicle grows larger during the end of this phase A. Follicular phase B. ovulation C. Luteal phase
Here's a match of the descriptions with the correct phases of the ovarian cycle:
Progesterone levels are highest during this phase: C. Luteal phaseMenses occurs during the first part of this phase: A. Follicular phaseLH levels peak during, or just before, this phase: B. OvulationThis phase occurs approximately 14 days before the onset of menstruation: C. Luteal phaseGnRH secretion is inhibited by estrogen secreted from the corpus luteum during this phase: C. Luteal phaseThis phase corresponds to the secretory phase of the uterine cycle: C. Luteal phaseA follicle ruptures during this phase: B. OvulationThe antrum of a follicle grows larger during the end of this phase: A. Follicular phaseWhat is an Ovarian cycle?
The ovarian cycle is the monthly series of changes that occur in a female's ovaries, specifically in the development and release of an egg (ovulation).
The cycle is regulated by several hormones produced by the hypothalamus, pituitary gland, and ovaries, and is divided into three main phases: the follicular phase, the ovulatory phase (or ovulation), and the luteal phase.
Learn more about ovarian cycle, here:
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If two copper wires are the same length but different thicknesses, the ____ wire has more resistance to current. Group of answer choices thinner thicker
please help
There are many different chordates. Choose fifteen chordates to explore. As you explore fill in the chordate chart that can be downloaded below. For each chordate you will need to check if it is a vertebrate or invertebrate, when in its life cycle did it have a notochord, when in its life cycle did it have gill slits and note any other interesting fact about your animal.
Answer:
Giraffe - vertebrate
white tiger - vertebrate
Which statement describes a constructive force that shapes Earth's surface?
Help meeee
Answer:
a volcano erupts, a river deposits gravel at a bend , plate movement creates mountains
How would adding finer particles to the sand affect porosity?
Explanation:
Porosity depends on the size, shape, and mixture of grains and particles that compose soil and rock. For instance, small particles such as clays can compact more closely together, reducing the amount of porosity. However, larger particles such as sand and gravel will have more spaces available between them.
16. Which combination of terms correctly matches an organ system with a tissue in that system?
a. Circulatory system - cardiac muscle
b. Digestive system - cartilage
C. Respiratory system - pancreas
d. Nervous system - marrow
Answer:
B
Explanation:
Answer:
A
Explanation:
The Circulatory System is a system that circulates blood around the body. Cardiac Muscle refers to your heart, which is a prominent part in the Circulatory System.
In the beginning of "A Growing Problem," how does the author
introduce his argument that nonnative species should not live in
Florida?
O A. by comparing Florida to Southeast Asia
O
B. by comparing pythons to alligators
O
C. by referencing facts about the dangers of pythons
O
D. by referencing people's expectations of the Everglades
Answer: D
Explanation:
i took the quiz
Answer:
D.
Explanation:
I JUST submitted the test
In your experiment, you found the following offspring only:Tall green: 626 offspring.Tall yellow: 313 offspring.Short green: 309 offspring.Stay with your original hypothesis/assumption, test it using chi2 test and analyze the result (whether you want to reject the hypothesis and why).(6p)
Complete question:
1. You found a new species of garden pea and have decided to repeat Mendel’s experiments. You have obtained two true-breeding pea plants that are tall (T) with yellow pods (g), and short (t) with green pods (G), respectively. Capital letters indicate dominant traits.
a. What is the genotype and phenotype of the F1 generation? (2p)
b. You allowed self-fertilization in F1 generation and obtained F2 generation. Using Punnett square to obtain the phenotypes, genotypes and their respective ratios. (4p)
2. If you obtained 1248 offspring in the F2 generation in Question 1, calculate how many offspring of each phenotypic class you would expect to have. (4p)
3. When you finish questions 1 and 2, under what assumption/hypothesis did you perform your analysis/calculation? Is there an alternative assumption/hypothesis, which may result in a different conclusion? If yes, what is the alternative assumption/hypothesis and what kind of offspring and in what numbers do you expect to obtain? (4p)
4. You only need to answer A or B to get this 6p. Please indicate which question you are answering. In your experiment, you found the following offspring only: Tall green: 626 offspring. Tall yellow: 313 offspring. Short green: 309 offspring.
A: If you stay with your original hypothesis/assumption, test it using chi2 test and analyze the result (whether you want to reject the hypothesis and why).
B: If you believe that the alternative hypothesis fits better with your data, test it using chi2 test and analyze the result (whether you want to accept the hypothesis and why).
Answer:
1) a. 100% of the progeny will be dihybrid, TtGg, exhibiting the phenotype
Tall plants with green pods.
b. F2 Gentotype:
1/16 TTGG2/16 TTGg1/16 TTgg2/16 TtGG4/16 TtGg2/16 Ttgg1/16 ttGG2/16 ttGg1/6 ttggF2 Phenotype:
9/16 Tall plants with green pods (T-G-)3/16 Tall plants with yellow pods (T-gg)3/16 Short plants with green pods (ttG-)1/16 Short plants with yellow pods (ttgg)Phenotypic ratio → 9:3:3:1
2) T-G- → 702 individuals
T-gg → 234 individuals
ttG- → 234 individuals
ttgg → 78 individuals
3)
Null Hypothesis: The population is under Hardy-Weinberg equilibrium. The alleles of this population assort independently.Alternative Hypothesis: The population is not in equilibrium. Alleles do not assort independently.4) a. There is enough evidence to reject the null hypothesis, meaning that the difference between the observed number of individuals and the expected ones is statistically significant. The population is not under equilibrium H-W. Alleles do not assort independently.
Explanation:
1) 1st Cross: True-breeding tall (T) with yellow pods (g) pea plant with a short (t) with green pods (G) plant
Tall and Green pods are the dominant traits,Short and yellow pods are recessive traits.Parentals) TTgg x ttGG
Gametes) Tg, Tg, Tg, Tg tG, tG, tG, tG
F1) 100% of the progeny will be dihybrid, TtGg, exhibiting the phenotype
Tall plants with green pods.
2nd Cross: F1 self-fertilization
Parentals) TtGg x TtGg
Gametes) TG, Tg, tG, tg
TG, Tg, tG, tg
Punnett square) TG Tg tG tg
TG TTGG TTGg TtGG TtGg
Tg TTGg TTgg TtGg Ttgg
tG TtGG TtGg ttGG ttGg
tg TtGg Ttgg ttGg ttgg
F2) Gentotype:
1/16 TTGG2/16 TTGg1/16 TTgg2/16 TtGG4/16 TtGg2/16 Ttgg1/16 ttGG2/16 ttGg1/6 ttggPhenotype:
9/16 Tall plants with green pods (T-G-)3/16 Tall plants with yellow pods (T-gg)3/16 Short plants with green pods (ttG-)1/16 Short plants with yellow pods (ttgg)Phenotypic ratio → 9:3:3:1
2) The total number of individuals in the F2 is 1248.
16 ----------------- 1248 individuals --------------- 100% of the progeny
9 T-G- ----------- X = 702 individuals-------------X = 56.25%
3 T-gg ----------- X = 234 individuals ----------- X = 18.75%
3 ttG- ------------- X = 234 individuals ---------- X = 18.75%
1 ttgg ------------- X = 78 individuals ------------ X = 6.25%
3)
Hypothesis: The population is under Hardy-Weinberg equilibrium. The alleles of this population assort independently.Alternative Hypothesis: The population is not in equilibrium. Alleles do not assort independently4) F2 composed of:
Tall green: 626 offspring. Tall yellow: 313 offspring. Short green: 309 offspring.Tall/Green Tall/Yellow Short/Green Short/Yellow
Observed 626 313 309 0
Expected 702 234 234 78
(Obs-Exp)²/Exp 8.23 26.7 24 78
X² = Σ(Obs-Exp)²/Exp = 8.23 + 23.7 + 24 + 78 = 136.93 ≅ 137
Freedom degrees = genotypes - number of alleles = 9 - 4 = 5
Significance level, 5% = 0.05
Table value/ Critical value = 11.07
X² = 137
X² > Critica value
137 > 11.07
There is enough evidence to reject the null hypothesis, meaning that the difference between the observed number of individuals and the expected ones is statistically significant. The population is not under equilibrium H-W. Alleles do not assort independently.
Denitrifying bacteria _____.
are part of the carbon-oxygen cycle
absorb oxygen from the atmosphere
release nitrogen into the atmosphere
break down nitrogen into ammonia
Infer: In which part of Earth's core do
convection currents occur?
Answer:
mantle
Explanation:
Convection currents in the Earth occur in the mantle. The core of the Earth is extremely hot, and material in the mantle close to the core is heated..
describe the parts of a medical emergency card
Which of the following is an example of the endocrine system maintaining homeostasis? (3 points)
-Detecting a pain stimulus and sending a signal to the spinal cord to perform an automatic response
-Discharging an excessive amount of hormones in the blood and not sending a signal to stop production
-Sending a message to the pituitary gland to start producing a hormone when the levels in the body are too low
-Using sense organs to get information about the outside world and direct an appropriate body response release
Answer:
-Discharging an excessive amount of hormones in the blood and not sending a signal to stop production
Explanation:
Endocrine system is regulated by negative feedback mechanisms that work to maintain homeostasis.
Concentration of hormones, and how they effect other body systems, are controlled in this manner.
For instance, the blood glucose regulation is controlled by insulin and glucagon, hormones produced by the pancreas.
HEY BESTAY I NEED UR HELP WILL MARK U BRAINLIEST
Which part of the carbon cycle shown in the figure contributes the most to the greenhouse effect?
(20 Points)
The decay process returns carbon dioxide to the soil.
The remains of dead organisms gradually change into fossil fuels.
Photosynthetic organisms remove carbon dioxide from the atmosphere.
A Burning fossil fuels and wood releases carbon dioxide into the atmosphere.
In this food web what is represented by the chains of arrows from the grass to the fox?
Answer:
Does anyone watch shaurya aur anokhi ki kahani on star plus an Indian serial you'll love it
explain the following type of respiration with diagram in toad:
1..Buccal respiration
2..Cutaneous respiration
3.. Pulmonary respiration
Answer:
1.Buccal pumping is "breathing with one's cheeks": a method of ventilation used in respiration in which the animal moves the floor of its mouth in a rhythmic manner that is externally apparent.
2.Cutaneous respiration, or cutaneous gas exchange, is a form of respiration in which gas exchange occurs across the skin or outer integument of an organism rather than gills or lungs.
3.Pulmonary ventilation is commonly referred to as breathing. It is the process of air flowing into the lungs during inspiration (inhalation) and out of the lungs during expiration (exhalation.
Yan Lang po Sana makatulung
What belongs there in the box
Answer:
Tissu
Explanation:
believe me my friend
The rotation of the earth causes winds to shift and ocean currents to change. This is an example of?
A) inertia.
B) cyclones.
C) acceleration.
D) topographical variation
Answer:
d) topographical variation
Explanation:
Do you think the amount of foam in the glasses will differ?
Answer:
these are all the answers to the entire course activity
Please mark as brainliest if this helps
Explanation:
20. Which does NOT describe primary succession? *
O Decomposing organic matter forms soil
O Presence of existing fertile soil
O Long-term occurrence over extended time
Barren land once covered by glacier
WILL GIVE BRAINLINESS PLEASE HELP SO I WONT FAIL
Choose one of the following scenarios and answer the questions provided. Support your answers using scientific reasoning and discussing possible impacts to individuals, society, and the environment. Be sure to also discuss any medical or ethical issues that may apply. (10 points)
Scenario 1:
Genetic engineering can be used to create more productive strains of farm animals. By adding genes to an animal's DNA, the animal can be made to produce milk or meat containing vital nutrients that would not be found naturally in those products. This provides a greater amount of nutrients per serving of milk or meat.
Do you think that this type of genetic engineering should be pursued? Explain your answer. (5 points)
What are some possible impacts (positive and negative) of this type of genetic engineering on individuals, society, and the environment? (5 points)
Scenario 2:
In the future, doctors may be able to evaluate your DNA to check for genetic markers related to specific medical conditions or harmful reactions to medications. Your personalized genetic profile could be kept on record and referred to in order to develop personal medical treatment based on your unique DNA sequencing. Scientists have found that just small variations in a specific section of your DNA can help determine how well some medications can work for you or if they would be beneficial at all.
Would you want to have your DNA profile kept in your medical record as a reference for your doctors? Explain your answer. (2 points)
What are potential pros and cons of having such tests done and referring to DNA sequences when determining a patient's medical treatment? (5 points)
Describe how the availability of this technology might affect the frequency of genetic diseases in individuals and populations. (3 points)
Can we depend on nonrenewable energy resources for our energy needs?
Answer:by
Explanation:
Answer:
Explanation: The answer is yes we can. We are depending on them now and they supply most of our needs to live.
Hope this helps and feel free to copy and paste it :)
is the long-term average weather over a large area
50. The flow chart below shows how a metamorphic rock can change into a
sedimentary rock. Which of these processes would be the correct label to
replace the question mark?
Metamorphic rock
Sediment
Sedimentary rock
Erosion
?
A) Cooling
B) Deposition
C) Melting
D) weathering
Answer:
The process that would be the correct label to replace the question mark in this question is:
B) Deposition
Explanation:
Deposition takes place after erosion of sedimentary rock. At this stage, the eroded sedimentary rocks build up under high pressure heat, wind, ice, water, and other natural forces to originate the rock formation cycle once again. Naturally, after deposition, the igneous rocks, which have then layered up sedimentary rocks to become metamorphic rocks.
HELP ASAP PLEASE I WILL MARK BRAINLY
David roller skates 42 Km in 3 1/2 hours. What is his average speed in kilometers per hour? Speed =
Answer:
12km
Explanation:
This is pretty easy, all you have to do is divide 42 by 3.5 and then you get 12<3 hope that helps!!
The exchange of gases and other materials between cells in the body and cells in the blood
occurs in...
A. stomach
B. capillaries
C. arteries
D. veins
Search in the internet a picture that demonstrates a skill in harvesting/capturing animal/fish?. Paste the picture below.