Answer:
Natural Selection for the Birds
Purpose:
To determine which birds with which beaks survive best in their environment depending on the type of food available.
Question:
What is the effect of the type of food available on the frequency of different types of bird beaks? Hypothesis:
If the food type changes in the environment, then the amount of each type of bird beaks will change because birds with beaks more suited to the available food will be more successful over time.
Variables:
The independent variable of the lab is the type of food that is available to the birds. The dependent variable of the lab is the frequency of each type-size and shape-of beaks.
Materials:
100 sunflower seeds
100 raisins
100 grains of rice
2 forks
2 spoons
2 knives
Plastic cup
Procedure:
1. Gather around the edge of the table cloth, mixing the three groups fairly evenly.
2. Pick up food pieces only with your tool, using the pair of utensils in one hand, simulating the action of a beak.
3. Pick up one piece of food at a time, and put it in your cup (“stomach”) before picking another piece of food.
4. Keep your body off the table cloth and pick up food only within your reach.
5. Start only when the teacher says “Go” and finish when all food has been “eaten.”
Data—Environment with Equal Amounts of Insects, Seeds, and Fruit
Second Generation
Flock X
Flock Y
Flock Z
Insects Eaten
35
32
33
Seeds Eaten
34
46
20
Fruit Eaten
78
15
7
Total
147
93
60
Percentage
49%
31%
20%
Simulated Number of Birds in Flock for 3rd Generation
15
9
6
Data—Changed Environment with Equal Amounts of Insects and Seeds but No Fruit.
First Generation
Flock X
Flock Y
Flock Z
Insects Eaten
30
60
60
Seeds Eaten
27
93
30
Total
57
153
90
Percent
19%
51%
30%
Simulated Number of Birds in Flock for 2nd Generation
6
15
9
Second Generation
Flock X
Flock Y
Flock Z
Insects Eaten
15
100
44
Seeds Eaten
17
80
44
Total
32
180
88
Percent
11%
60%
29%
Simulated Number of Birds in Flock for 3rd Generation
3
18
9
Analysis:
Based on the data in the first table flock X consumes mostly fruit. When fruit was taken away there was a decrease in the number of birds that flock X contained. Flock Y consumes mostly seeds. There was no effect on flock Y when fruit was removed. Due to the fact that flock Z eats mostly insects, the flock was not affected by the removal of fruit.
Conclusion:
In this lab I learned about how favorable traits are important when nature selects what organism will survive and pass down its genes for the next generation to inherit, I also learned that most species learn to adapt to their environments so that they can have a favorable trait to be able to survive in their environment. I was able to observe that in the wilderness you need that favorable trait so that you are able to reproduce and pass down your genotypes for the next generation of you species to inherit. I gained useful skills such as how to determine the next generation’s population by analyzing results from experiments I conducted relating to the bird populations
Explanation:
i actually paid attention and did it
What path does pollen need to travel for the plant to reproduce?.
Answer:
stigma
Explanation:
Pollination occurs when pollen grains from the anther land on a stigma. After pollen grains land on the stigma, a pollen tube grows from the pollen grain, through the style, and into the ovary. Sperm cells inside the pollen grain travel down the pollen tube and into the ovary which contains the ovules.
Answer:
The Stigma
Explanation:
This is the male reproductive cell, and then, when it travels through the Stigma, then, it goes on the top of the flower, then, a bee carries it to another plant's female reproductive cell, then the cells go into the embryo and create a plant's seed.
Thanks!
__________ and their surrounding wetlands are bodies of water usually found where rivers meet the sea.
Answer: Estuaries
Explanation: Estuaries and their surrounding wetlands are bodies of water usually found where rivers meet the sea.
(sup bestie)
hello humans ~
______ is used for the production of alcohol and wine.
Yeast
Mosquito
Ant
Algae
Explanation:
the correct answer is yeast
The serous fluid within the pericardial cavity works to:__.
a. eliminate blood pressure spikes.
b. equalize the pressure in the great vessels.
c. lubricate the membranes of the serous pericardium.
d. slow the heart rate.
The serous fluid within the pericardial cavity works to lubricate the membranes of the serous pericardium.
The pericardial cavityThe pericardial cavity is a space that is enclosed by the two layers of serous pericardium around the heart.
The pericardium is a thin, two-layered, fluid-filled sac that covers the outer surface of the heart. it is divided into 2 namely:
fibrous pericardium and serous pericardium.The serous fluid which is also called pericardial fluid helps to decrease friction between the pericardial layers. This is because, they lubricate the membranes of the serous pericardium.
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Why does active
transport require
energy?
nsport.
A. Materials are moved with the
concentration gradient.
B. Materials simply flow along the
path of least resistance.
C. Materials move against a
concentration gradient.
D. It does not require energy.
Answer:
C. Materials move against a concentration gradient.
I hope this helps you
:)
Answer:
C
Explanation:
Materials cannot naturally move against the concentration gradient thus require energy for their movement
What are the two intermediate types of rock?
Answer:
andesite, dacite and trachyandesite among volcanic rocks and diorite and granodiorite among plutonic rocks.
Explanation:
you can choose between anyone of those
hello humans ~
The bacterium present in curd is:
Salmonella typhi
Lactobacillus
Penicillin
Vibrio cholera
Explanation:
the answer is Lactobacillus
What makes up everything around us?
Explain in detail what all living organisms are made of using the following terms: matter, atoms, elements,
compounds, and chemical bonds.
Answer:
Matter is anything and everything that has mass. Thats what makes up everything around us
Explanation:
Which of the following is true regarding gene regulation in prokaryotes such as bacteria?
A: Operons in prokaryotic gene regulation always promote transcription
B:prokaryotic genes are usually transcribed as a group and have single promoter
C: prokaryotic gene expression can inducible or repressible
D: gene regulation in prokaryotes is more complex than eukaryotes
Answer:
C
Explanation:
The Operons can have a promoter or reducer that can stop or activate gene transcription
1. Which of the following does NOT describe a use of fossils?
O Gives an example of what past animals may have looked like.
O Determine features of the climate in which these animals lived.
.
O Provide evidence of the activity of animals at the time.
O Determine the sound that animals made during their lives.
D.) Determine the sound that animals made during their lives.
Friction, conduction and induction are three ways of creating a static charge on an object. Which method or methods will produce the same charge on two objects?
Answer:
cooking soup and driving a motorbike
hello humans ~
Which of the following is the non-living part of the cell?
A. Cell membrane
B. Cytoplasm
C. Mitochondrion
D. Cell wall
Explanation:
D. Cell wall is the non-living part of the cell
Answer:
It's Cell Wall.Explanation:
Cell Wall is the non-living part of the cell.Help me please help me
Answer:
Attachment
Explanation:
I hope this is right
Answer:
I think it's replication
Explanation:
Please mark me brainliest if correct
What structures have the chromosomes formed on page 5?
Answer:
Homologous chromosomes come together forming a tetrad
Explanation:
Describe the common tissues and structures found in accessory organs
Answer:What are some accessory organs to digestion and what do they do?
Explanation:The salivary glands, liver and gall bladder, and the pancreas aid the processes of ingestion, digestion, and absorption. These accessory organs of digestion play key roles in the digestive process. Each of these organs either secretes or stores substances that pass through ducts into the alimentary canal.
according to cell theory which are made of cells check all that apply
Answer:
Cells are the basic building blocks of all living things.
Explanation:
I have no idea what the answers are but every living thing is made of one or more cells.
A condition known as varicose veins is due to leaky venous valves and causes blood to accumulate in veins. Why are valves found in veins, especially those in the lower extremities
Varicose veins are a form of chronic venous insufficiency, or a defect in the veins that prevents them from pumping blood properly.
What are venous valves?These consist of two elastic flaps of tissue that alternately open and close allowing blood to flow through the valve to another vein.
These work in conjunction with the musculoskeletal system, the muscles are constantly tensing and releasing, a pattern that causes the valves to open and close as needed.
Many veins are found, especially in the lower extremities, because they have valves that act in only one direction, a tightening of the muscles results in an opening of the valves, while a relaxation of the muscles results in the closing of the valves.
Therefore, we can conclude that one of the main functions of the venous valves is to guarantee the adequate return of blood to the heart, if a return flow occurs, the blood can begin to accumulate in the veins, potentially damaging them.
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Which of the following are controversies over water usage in the United States? Select three correct answers.  whether dams impact the volume of rivers
Whether there are hidden cost to tap water
Whether people should drink bottled or tap water
Whether water treatment should be privatized
Whether dams increase the salt level of water
Whether people should build dams on rivers
Are controversies about water use in the United States, whether dams impact the volume of rivers, Whether people should drink bottled or tap water and Whether water treatment should be privatized.
Controversies over water use in the United States?Domestic access to water represents an ongoing environmental injustice in the United States. However, the specific dimensions of this injustice and how they vary across types of water deprivation remain largely unknown.
Can you drink tap water in the US?Since the passage of the Clean Water Act in 1972, access to clean water for all Americans has been a goal of the United States government.
With this information, we can conclude that there are controversies about water use in the United States, whether dams impact the volume of rivers, Whether people should drink bottled or tap water and Whether water treatment should be privatized.
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Answer:
The answer's are:
Explanation:
-whether water treatment should be privatized
-whether people should drink bottled or tap water
-whether people should build dams on rivers
The Gulf of Mexico dead zone is an area of hypoxic waters at the mouth of the Mississippi River. Its area varies in size, but can cover
up to 6,000 7,000 square miles. The zone occurs between the inner and mid-continental shelf in the northern Gulf of Mexico
beginning at the Mississippi River delta and extending westward to the upper Texas coast. Thousands of farms are located along the
Mississippi River and its tributaries and as water washes into the river after a heavy rain, it brings with it nutrients from fertilizers
added to farmland. These materials flow downriver and eventually enter the Gulf of Mexico, where they create conditions for a dead
zone: an area of low to no oxygen that results in the death of fish and other marine life. The Gulf of Mexico is a major source area for
the seafood industry. The Gulf supplies 72% of US harvested shrimp. 66% of harvested oysters, and 16% of commercial fish
Consequently, if the hypoxic zone continues or worsens, fishermen and coastal state economies will be greatly impacted. What can be
done to minimize the Gulf dead zone? Choose ALL that could apply
A)
B)
Control of animal wastes so that they are not allowed to enter into
waterways
Adjust the timing of fertilizer applications to limit runoff of excess
nutrients from farmland.
Monitor septic systems and sewage treatment facilities to reduce
discharge of nutrients to surface water and groundwater
Restrict land use in the areas surrounding the Mississippi delta to exclude
Industrial sites
Counter the effects of fertilizers on algal growth in the Gulf with the use
of chemical herbicides
D)
E
The things that should be done to minimize the Gulf dead zone include:
A. Control of animal wastes so that they are not allowed to enter into waterways.
B. Adjust the timing of fertilizer applications to limit runoff of excess nutrients from farmland.
E. Counter the effects of fertilizers on algal growth in the Gulf with the use of chemical herbicides.
It should be noted that it's important to manage nutrients efficiently in farmlands through the restoration of wetlands in order to capture nutrients and then reduce runoff.
In order to minimize the Gulf dead zone, there should be control of animal wastes so that they are not allowed to enter into waterways. Also, there should be an adjustment of the timing of fertilizer applications to limit runoff of excess nutrients from farmland.
Answer:
What is the Gulf of Mexico Dead Zone? The Gulf of Mexico dead zone is an area of hypoxic (link to USGS definition) (less than 2 ppm dissolved oxygen) waters at the mouth of the Mississippi River. Its area varies in size, but can cover up to 6,000-7,000 square miles.
Explanation:
The things that should be done to minimize the Gulf dead zone include:
A. Control of animal wastes so that they are not allowed to enter into waterways.
B. Adjust the timing of fertilizer applications to limit runoff of excess nutrients from farmland.
E. Counter the effects of fertilizers on algal growth in the Gulf with the use of chemical herbicides.
It should be noted that it's important to manage nutrients efficiently in farmlands through the restoration of wetlands in order to capture nutrients and then reduce runoff.
In order to minimize the Gulf dead zone, there should be control of animal wastes so that they are not allowed to enter into waterways. Also, there should be an adjustment of the timing of fertilizer applications to limit runoff of excess nutrients from farmland.
In species like sea turtles with high juvenile mortality, low adult mortality, and low fecundity, conservationists can most effectively help them by _____. View Available Hint(s)for Part A focusing on keeping adults alive focusing on keeping juveniles alive captive breeding programs controlling predator populations
repeatedly broke the law as she fought to bring reproductive freedom to women.
The History of Abortion: Select the best answer from the choices provided.
O A. Margaret Sanger
OB.
Elizabeth Cady Stanton
OC. Susan B. Anthony
OD.
D. Clara Barton
Answer:
It is A, Margaret Sanger
Explanation:
just took the test on plato and it was right
hello humans ~
Which one of the following is not produced by the process of fermentation?
Cheese
Milk
Yoghurt
Wine
Explanation:
the correct answer is milk
Answer:
MilkExplanation:
Milk is not produced by the process of fermentation.Schist rock composition?
Answer:
schist rock are composed largely of platy minerals such as
muscovite, chlorite, talc, sericite, biobite, and graphite
Please help!! 10 points!
Answer:
that looks correct to me
Explanation:
if not the maybe switch 2 and 3
CFCs can act as greenhouse gases and as chemicals that reduce the ozone levels in the stratosphere. A worldwide ban on CFCs in 1987 was enacted as part of the Montreal Protocol. However,
according to the graph, the level of CFCs did not significantly decrease after 1990. Which statement best explains the level of CFCs after 1990?
lSince the level of CFCs did not significantly decrease after 1990, CFCs will contribute to the current increase in global warming
What are greenhouse gases?Greenhouse gases are those gases which contribute to the increase in global warming due to their property of preventing heat energy escape from the earth.
CFCs are greenhouse gases.
Therefore, if the level of CFCs did not significantly decrease after 1990, CFCs will contribute to the current increase in global warming.
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In a life cycle with alternation of generations, multicellular haploid forms alternate with ________.
Answer:
multicellular diploid forms.
Explanation:
According to akc. Org, a typical dog can hear sounds approximately __________ times farther away than a typical human can.
According to akc. Org, a typical dog can hear sounds approximately four times farther away than a typical human can.
How many times is canine hearing better than human hearing?In fact, canine hearing is quite keen! Some studies even show that dogs are able to hear noises at a distance up to four times greater than we can hear.
With this information, we can conclude that according to akc. Org, a typical dog can hear sounds approximately four times farther away than a typical human.
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Go outdoors and look for ten different plants. See if you can figure out which type of seed dispersal each plant uses, and make notes about each one. Some may have more than one method of dispersal. If you find a plant that you suspect disperses seeds in a way that you haven't studied, try to figure out how the plant does it. When you're finished, write your discoveries in a list with the name of the plant you observed (if you know it; otherwise, describe the plant).
Some you wouldn't see by stepping outside, but it gives you a general understanding of what you should be looking for.
Hope this helps!
The oceans, lakes and rivers that cover 75% of Earth's surface are called the
A
lithosphere.
B
troposphere.
с
mesosphere.
D
hydrosphere.
A muscle spindle responds to the ____. a. fatigue of the muscle b. oxygen level in the muscle c. acetylcholine concentration at the nerve-muscle junction d. stretch of the muscle
(D)-Stretch of muscles
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