Complete question:
The offspring produced between two given types of plants can be any of the three genotypes, denoted by A, B and C. A theoretical model of gene inheritance suggests that the offspring of types A, B and C should be in a 1:2:1 ratio (meaning 25% A, 50% B, and 25% C). For experimental verification, 100 plants are bred by crossing the two given types. Their genetic classifications are recorded in the table below.
Genotype Observed frequency
A → 18 individuals
B → 55 individuals
C → 27 individuals
Do these contradict the genetic model?
Use a 0.05 level of significance.
Determine the chi-square test statistic.
Answer:
Do these contradict the genetic model? No, according to the chi-square test, there is not enough evidence to reject the null hypothesis of the population being in equilibrium.
Explanation:
Available data:
Crossed genotypes: twoGenotypes among the offspring; Three → A, B, and CExpected phenotypic ratio → 1:2:1Total number of individuals, N = 100A = 18 individualsB = 55 individualsC = 27 individualsSo, let us first state the hypothesis:
H₀= the population is equilibrium for this locus → F(A) = 25%, F(B) = 50%, F(C) = 25% H₁ = the population is not in equilibriumNow, let us calculate the number of expected individuals, according to their expected ratio.
4 -------------- 100% -------------100 individuals
1 --------------- 25% -------------X = 25 individuals A
2 -------------- 50% -------------X = 50 individuals B
1----------------- 25%--------------X = 25 individuals C
A B C
Observed 18 55 27 Expected 25 50 25 (Obs-Exp)²/Exp 1.96 0.5 0.16(Obs-Exp)²/Exp
A) (18 - 25)²/25 = 49/25 = 1.96
B) (55 - 50)² / 50 = 25/50 = 0.5
C) (27 - 25)²/25 = 4/25 = 0.16
Chi square = X² = Σ(Obs-Exp)²/Exp
∑ is the sum of the terms O are the Observed individuals: 2 in chamber B, and 18 in chamber A. E are the Expected individuals: 10 in each chamberX² = ∑ ((O-E)²/E) = 1.96 + 0.5 + 0.16 = 2.62
Freedom degrees = 2
Significance level, 5% = 0.05
Table value/Critical value = 5.99
X² < Critical value
2.62 < 5.99
These results suggest that there is not enough evidence to reject the null hypothesis. We can assume that the locus under study in this population is in equilibrium H-W.
Which of the following statements is not part of the cell theory? A) All living cells come frondivision of preexisting cells. B) All cells are surrounded by a cell wall. C). A cell is the smallest unit of life, individually alive even as part of a multicelled organism.
What are five decomposers that are found in or around Pride Rock in the movie Lion King
Answer:
Vultures, Hyenas, Ants, Bacteria that's all i got really
Explanation:
All of these either eat remains or break down remains of a decomposing animal and in doing so, speed up the process of the decomposing.
The five decomposers that are found in or around Pride Rock in the movie Lion King are Vultures, Hyena, Ants, and bacteria.
What is the movie Lion King?The movie Lion King is directed by Jon Favreau, and written by Jeff Nathanson. This is an animated movie by Walt Disney in 2019.
This is a story of lion and his son Simba, the lion died and then Simba will take revenge for the death of his father, Mufasa.
Thus, the five decomposers that are found in or around Pride Rock in the movie Lion King are Vultures, Hyena, Ants, and bacteria.
Learn more about the movie Lion King
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PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA 40 POINTS* DONT SKIP :(( .!
Answer: a
Explanation:
Answer:
d
Explanation:
D is the only option where she can actually moniter the ecosystem
If an organism has six pairs of chromosomes how many chromosomes will be in one cell produced by meiosis?
Answer: 23
Explanation:
natural selection vs artificial
Answer:
Please read the explenation for I must go into detail to explain this.
Explanation:
So before I answer your question, I am going to explain what the two things are.
Natural selection:
Natural selection is the evolution of traits in a species due to changes in genetics that is mainly caused by enviormental problems and changes.
If this is a bit confusing, here is an example:
Lets say that a Mandarin beatroot lizard is being killed off by the Mandarin carrot bird because all the trees in the area have turned yellow. 100 years from the time this happened, the Mandarin beatroot lizard that's population was 85% red and 15% yellow is now 90% yellow and only 10% red.
This is because of natural selection. THe Mandarin carrot bird was killing a large portion of the red population. The yellow population was killed only occasionaly. When the Madarin beatroot lizard went to breed, there were more yellow lizards breeding than red lizards. If you know how genetics work, then you know that in simple terms, this means more lizards will be yellow in the next genetration.
Slowl;y as the generations passed, more and more yellow lizards were bred and born. 100 years later, over generations and generations, the population was almost coimpeltly yellow.
Artifical selection:
Artifical selection is where the human race selects a species and bred specific organisms of that species so that the specific trait being bred for is more evident in the species.
Again, if this is confusing, here is an example:
The lab NV-110 was taking bearlybubble wolves with shorter noses and breeding them together. After 30 years, and many generations, the bearlybubble wolves had noses that were half a inch shorter than the orginal bearlybubble wolves. When the new wolves were let into the forest they had been taken from, half of the died in the first week due to starvation.
The humans took specific traits in a species and bred them together, this process was repeated over 30 years. The specific trait of the new generation of orgniasms has been changed, but this change affected the orgnaisms survive, and was dentrimental to the species.
So now knowing the two things, what do you think the difference is? Think about ti for a minute before reading more.
The difference betweent the two types of selection is:
Artifical selection can harm or possibly nuetral for the organism, wheareas natural selection will be helpful or nuteral to the organism.Artifical selection involves humans, wheareas naturals election does not,Artifical selection does not need any specific change in the enviorment or world to happen, wheareas natural selection does.Artifical selection is usally quicker than natural selction for artificial selection is purposful breeding, whereas natural selection is by-chance breeding.I hope this make sense to you, I can try to make this simpler or more detailed if you want me to. ;)
please help i am giving brainliest
The endocrine system is made up of glands that
A. secrete enzymes that help to digest food.A. secrete enzymes that help to digest food.
B. carry oxygen to all the parts of the body.B. carry oxygen to all the parts of the body.
C. secrete hormones directly into the bloodstream.C. secrete hormones directly into the bloodstream.
D. carry nerve impulses from one part of the body to another.
No dam links
Answer:
What glands secrete enzymes?
Abstract. The exocrine pancreas and certain salivary glands of mammals secrete a variety of enzymes into the gastrointestinal tract, where they digest food. The same glands also release these enzymes into the bloodstream.
Explanation:
Why is color NOT the best property to identify minerals A) different minerals can have the exact same colors B) all minerals have the same streak C) color can change due to impurities D) all minerals have one type of element
Answer:
b
Explanation:
gthtrhm xkcnsdvnsf
Read the statement
An elephant is walking on the hot African plains in search of food. As it does so, its body temperature increases. As it walks, it comes across a small pond.
What should this elephant do to BEST maintain homeostasis?
Select one:
A. It should jump into the pond to cool off.
B. It should use its trunk to take a drink.
C. It should flap its ears to create a breeze.
D.It should move at a slower pace to conserve energy.
Thanks for helping me!
Answer:
I think it would be "B".
Explanation:
if the elephant is by a pond it would most likely drink the water to stay cool.
The evolutionary species concept defines a species as: A. a group of populations that have shared a past and will have a shared future B. reproductively isolated populations C. smallest monophyletic taxa D. morphologically similar populations
Answer:
The correct option is A.
group of populations that have shared a past and will have a shared future
Explanation:
This is because evolutionary species concept is a concept that indicate a form of ancestry descendants or lineage of populations that descend from the same ancestors possessing similar characteristics which were inherited from the ancestry and these traits are evident in the future.
What is the weather like at a front boundary?
Answer:
Because a stationary front marks the boundary between two air masses, there are often differences in air temperature and wind on opposite sides of it. The weather is often cloudy along a stationary front, and rain or snow often falls, especially if the front is in an area of low atmospheric pressure.
Which body part represents the notochord in vertebrates
Answer:
the vertebral column
Answer:
c
Explanation:
Which type of weather do anticyclones bring?
Answer:
i think anticyclone weather bring us lots of cold weather and snow
Answer:
Anti cyclone bring us very cold, crisp bright winter days and warm sunny summer weather.
Explanation:
What causes matter to be in a particular state (phase)?
Answer:
In the physical sciences, a phase is a region of space (a thermodynamic system), throughout which all physical properties of a material are essentially uniform. Examples of physical properties include density, index of refraction, magnetization and chemical composition. A simple description is that a phase is a region of material that is chemically uniform, physically distinct, and (often) mechanically separable. In a system consisting of ice and water in a glass jar, the ice cubes are one phase, the water is a second phase, and the humid air is a third phase over the ice and water. The glass of the jar is another separate phase. (See state of matter § Glass)
Explanation:
How are organisms different from one another?
Answer:
They inherit it from their parents or it is due to them living in a different environment.
Explanation:
The main function of cell respiration is to produce A. glucose B. NADH and FADH2. C. CO2. D.mitochondria E. ATP.
Again No links thank you!
The base of all ocean food chains are formed by
Answer:
Phytoplankton
Explanation:
PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA 40 POINTS* DONT SKIP :(( .!
Answer:
C
Explanation:
Animals that don't adapt to their new environment die
Which is the smallest of the terrestrial planets?
A. Mercury
B. Earth
C. Venus
D. Mars
Answer:
A. Mercury
Explaination:
Explaination
This category of endangerment occurs when organisms are still abundant in its natural range, but declining in numbers:
A. Endangered species
B. Threatened species
C. Invasive species
D. Endemic species
E. Red list species
Which phase describes "movement around each other" on a molecular level?
A) Solid
B) Gas
C) Liquid
D) Methane
Answer: I think it is liquid
Explanation:
What do all animals, including vertebrates and invertebrates, have in common?
Question 1 options:
They have backbones, internal skeletons, and muscles.
They are heterotrophs that must get their food from plants or other animals.
They have lungs or gills for breathing.
They are endothermic (warm-blooded).
Question 2 (1 point)
Saved
All animals share several common characteristics. Which is a characteristic shared by all animals?
Question 2 options:
endoskeletons and muscles
sensory organs and backbones
multi-cellular bodies
exothermic blood systems
Question 3 (1 point)
Sam’s teacher asked him to make observations about animals at the zoo. Sam went to the zoo and filled in these two charts that the teacher gave him.
What is the main difference between the species in Group 1 and Group 2?
Question 3 options:
Group 1 has small organisms, Group 2 has large organisms.
Group 1 are endothermic, Group 2 are exothermic.
Group 1 are vertebrates, Group 2 are invertebrates.
Group 1 has exoskeletons, Group 2 has soft bodies.
Question 4 (1 point)
Which of the following is a characteristic of all mammals?
Question 4 options:
lungs
hair
tail
both 1 and 2
Question 5 (1 point)
What is the benefit of an arthropod’s exoskeleton.
Question 5 options:
It allows arthropods to breathe.
It protects and supports the arthropod’s body.
It allows the arthropod to get food.
It allows the arthropod to see far distances.
Question 6 (1 point)
What do arthropods and segmented worms have in common?
Question 6 options:
They both have segmented bodies during some stage of their life.
They both have hard outer shells that are unmovable.
They both have bones and vertebrae.
They both lack any sense organs.
Question 7 (1 point)
To which group of invertebrates do cephalopods, such as squids, belong?
Question 7 options:
Arthropods
Echinoderms
Cnidarians
Mollusks
Question 8 (1 point)
Sweat glands, fur, and feathers are found on an endotherm.
Question 8 options:
True
False
Question 9 (1 point)
Vertebrates and invertebrates differ in the presence of a backbone. Another characteristic that distinguishes most vertebrates from many invertebrates, is that vertebrates —
Question 9 options:
have a relatively well-developed brain and circulatory system.
have long tube-like bodies that are divided into segments.
take in oxygen from their skins rather than from an inside organ.
have hard outer covering called exoskeletons.
Question 10 (1 point)
During chilly days, you might notice lizards lying (“basking”) in sunny areas. Why do lizards bask in the sun?
Question 10 options:
Ectothemic animals are lazy and the sun puts them to sleep.
Ectothermic animals need to get tanned by the sun's rays for camouflage.
Ectothermic animals use the suns rays to help them hide from enemies.
Ectothermic animals need the warmth from the sun to allow them to move around and hunt for food.
Question 11 (1 point)
Which group of animals could be correctly classified as endothermic?
Question 11 options:
robin, squirrels, mice
bears, snakes, wolves
frogs, lizards, snakes
groundhogs, hawks, crab
Question 12 (1 point)
Using the table, which statement is true?
Question 12 options:
Organisms in both Groups A and B have similar mechanisms for controlling their internal temperatures.
Organisms in Group A have fewer mechanisms for controlling their internal temperatures than those in Group B.
Organisms in both Group A and B usually coexist peacefully.
Organisms in both Group A and B are extinct species.
Question 13 (1 point)
How do “warm-blooded” animals cool off?
Question 13 options:
They convert the food they eat into cool energy.
They sweat or pant to lose heat by water evaporation.
They move to colder climates.
They move around a lot to stimulate their circulation.
Question 14 (1 point)
An animal takes on the temperature of their surroundings so they don't have to use food energy to keep warm. This means they don’t have to eat as often. They are considered an __?
Question 14 options:
Endotherm
Ectotherm
Question 15 (1 point)
Which of these factors is used to classify the different organisms on Earth into Kingdoms (such as protists, fungi, plant, animals, and bacteria) ?
I Number of cells in the organism
II How the organism obtains energy
Question 15 options:
I only
II only
I and II
Question 16 (1 point)
It's sunny in New York, but it is cool. Where would you expect to find this lizard during the day?
Question 16 options:
Under a rock
In a damp stream bed
Basking in a sunny spot
In a hole in the ground
Answer:
the first one is correct
Explanation:
all a
1. What do all animals, including vertebrates and invertebrates, have in common?
They have backbones, internal skeletons, and muscles.
2. All animals share several common characteristics. Which is a characteristic shared by all animals?
Endoskeletons and muscles.
3. Which of the following is a characteristic of all mammals?
both 1 and 2.
4. What is the benefit of an arthropod’s exoskeleton.
It protects and supports the arthropod’s body.
5. What do arthropods and segmented worms have in common?
They both have segmented bodies during some stage of their life.
6. Sweat glands, fur, and feathers are found on an endotherm?
True.
7. Vertebrates and invertebrates differ in the presence of a backbone. Another characteristic that distinguishes most vertebrates from many invertebrates, is that vertebrates?
Take in oxygen from their skins rather than from an inside organ.
8. During chilly days, you might notice lizards lying (“basking”) in sunny areas. Why do lizards bask in the sun?
Ectothermic animals need the warmth from the sun to allow them to move around and hunt for food.
9. Which group of animals could be correctly classified as endothermic?
Robin, squirrels, mice.
10. How do “warm-blooded” animals cool off?
They sweat or pant to lose heat by water evaporation.
11. An animal takes on the temperature of their surroundings so they don't have to use food energy to keep warm. This means they don’t have to eat as often. They are considered an __?
Ectotherm.
Thus, these are the answer to the following questions.
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The graphs below show the population size of Organism A in a local lake, and the average temperatures of the lake by month.
Answer choices:
A) June
B) May
C) August
D) July
Answer:
its B
Explanation:
dont ask be i just know, and i got a good grade for that work even though i was hard
Answer:
July
Explanation:
1.) The optimal temperature for the Organism A population is approximately 25°C.
2.) The month during which the average temperature of the lake is around 25°C is July.
3.) The correct answer is: July
In an energy pyramid, the bottom level represents...
A. consumers
B. producers
C. scavengers
D. decomposers
Answer: B. Producers
Explanation:
Answer:
B. producers
Explanation:
i'm pretty sure because i've had it on a test before and decomposers are off to the side, but producers are on the bottom. it could possibly be decomposers based on which charts you use since some put decomposers on the bottom, but most are producers
Plz help me well mark brainliest if you are correct!
Answer:
A(i think)
Explanation:
Earth is a satellite because it moves around the sun. The moon is a satellite because it moves around Earth. Earth and the moon are called "natural" satellites. ... These machines are launched into space and orbit Earth or another body in space.
PLEASE ANSWER THIS QUESTION :(
Answer:
○ 3, 4 .............ghhg
Explanation:
because......
These animals are similar in many ways except for which one of the following?
A. Both lay eggs on land.
B. Both can survive on land or in water.
C. Both mothers stay close to their eggs.
O D. Both look like adults, only smaller.
what is the outcome of cell signaling
Answer:
Other important large-scale outcomes of cell signaling include cell migration, changes in cell identity, and induction of apoptosis (programmed cell death).
Explanation:
help pleasee!! A fern plant is growing in the forest by Scott's house. The leaves of the fern plant are small and green. Scott often finds small caterpillars eating the leaves of the fern plant. Which of the following is an inherited characteristic of the fern plant? No links!!
A. The shape of the fern plant’s leaves.
B. The location of the fern plant inside the forest.
C. The distance of the fern plant from Scott’s house.
D. The number of leaves that are eaten by caterpillars.
Answer:
Can't be B
Can't be C
Can't be D
The correct answer should be A!
Hope this helps.
What can HIV become? (write it out)
HIV came become AIDS (acquired immunodeficiency syndrome) if not treated.
Which statement below would best illustrate the concept of natural selection?
A an organism can return to the characteristics of its ancestors
B a population of animals will move from one region to another
those organisms that are best adapted to the environment will survive to produce more offspring
D all organisms are made up of cells
Answer:
C. those organisms that are best adapted to the environment will survive to produce more offspring
Explanation:
Natural selection is a key concept in the formulation of the theory proposed by Darwin in 1859. Natural selection is defined as the main force that drives the prevalence and the increase of advantageous phenotypic traits. Selection natural acts by differential survival and reproduction of individual organisms that have better adapted to the environmental conditions in which these organisms live. These organisms with a greater adaptive fitness have more chances to survive and reproduce, thereby transmitting (and perpetuating) their genes to the following generations.
Answer:
those organisms that are best adapted to the environment will survive to produce more offspring
Explanation:
those organisms that are best adapted to the environment will survive to produce more offspring