More than 50% of ecosystems are currently being used unsustainably
T or F
The picture shows a contractile vacuole of a unicellular freshwater organism. The contractile vacuole regulates the flow of water into and out of the cell in an aquatic environement. What condtions cause the contracile vacuole to fill with water? Your answer: A.The concentration of water is greater outside the cell than inside the cell. B.The concentration of water inside the cell is the same as the concentration outside the cell. C.The temperature of water in the vacuole is higher than the temperature of its environment.
1
Select the correct answer from each drop-down menu.
Small frogs living in a marshy region feed on small insects in the region. The relationship between the frogs and insects is a
relationship. A particular species of lizards is introduced into the marshy land. These lizards also start feeding on
these insects. The introduction of lizards may lead to
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Options are not provided in the question. The complete question is as follows:
Select the correct answer from each drop-down menu.
Small frogs living in a marshy region feed on small insects in the region. The relationship between the frogs and insects is a _____ relationship. A particular species of lizards is introduced into the marshy land. These lizards also start feeding on these insects. The introduction of lizards may lead to ____________ .
1. a) commensal-host
b) parasite-host
c) prey-predator
2. a) competition between lizards and frogs for food
b) an increase in the number of frogs
c) no population change in any of the three species
Answer:
1. c) prey-predator
2. a) competition between lizards and frogs for food
Explanation:
1. Frogs feeding on small insects in the region shows prey-predator relationship. Predators are the dominating organism which kill weak organism for food and preys are the organisms which are killed. Here, frogs are the predators and small insects act as prey.
2. Introduction of lizards in the same region will increase the competition between lizards and frogs as their food is same that is small insects. Both frogs and lizards have same source of food (small insects), so lizard and frogs will fight for the same food.
Hence, the correct answers are 1. c) prey-predator
2. a) competition between lizards and frogs for food .
Answer:
The relationship between the frogs and insects is a
prey-predator relationship. A particular species of lizards is introduced into the marshy land. These lizards also start feeding on these insects. The introduction of lizards may lead to competition between lizards and frogs for food
.
Explanation:
15. Unlike identical twins, fraternal twins
A. are produced from two identical embryos.
B. result from the same fertilized egg.
C. are always the same sex.
D. result from two eggs fertilized by different sperm.
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How many chemical bonds can each carbon atom form?
Answer:
It has four valence electrons, which it can achieve a full outer energy level which forms four covalent bonds. When its bonds only with hydrogen, it forms compounds which is called hydrocarbons. Carbon can be form in single, double, or triple covalent bonds with other carbon atoms.
Explanation:
The valency of carbon is four. Therefore, carbon can form four chemical bonds.
What is a chemical bond?It is the attraction between two atoms, they share or exchange electrons to form molecules or compounds is known as a chemical bond. They share electrons to fulfill their valency. The number of bonds depends on the number of valencies.
There are three types of bonds and that are covalent, ionic, and metallic bond. A covalent bond or molecular bond is formed by sharing of electrons, it occurs in non-metals. Ionic bonds are formed by exchanging electrons, it occurs in both metal and non-metal. metallic bonds are present between two metals. The covalent bond is the strongest bond.
There are four valencies in carbon. Therefore, it can make four bonds.
Learn more about the chemical bond, here:
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What type of mountain ranges form at convergent plate boundaries
Answer: Cape Fold Mountains
Explanation:
5. If there is a large number of prey rodents, the number of owls will increase due to a healthy
food source. More owls feeding on the rodents will cause their population to decrease, which in
turn will eventually cause the owls number to decrease. Would you expect to find this pattern in other ecosystems between predators and prey? Explain.
Answer:
Yes
Explanation:
One would expect to find the same pattern in any other ecosystems between predator and prey unless there is a way the prey's population is being replenished.
When predators start hunting down preys, the population of preys start decreasing and this will in turn means less food for the predators. If the trend continues, competition for food become fierce among the predators and this will make their population to start decreasing as the competitively strong ones take over the little food that remains and the competitively weak ones are gradually left to starve to death.
Most scientists agree that saturated fats contribute to high levels of “bad” cholesterol, while monounsaturated fats and polyunsaturated fats lower this type of cholesterol. The table below shows data about fats in some common foods.
Food (14 g) Saturated fat (g) Monounsaturated fat (g) Polyunsaturated fat (g)
Canola oil 1.0 8.9 3.9
Margarine 1.6 5.4 3.4
Olive oil 1.9 9.9 1.4
Lard 5.0 5.8 1.4
Butter 7.9 3.7 0.5
Joyce and Linda are identical twins who are 50 years old and enjoy exercising daily. Joyce avoids eating any dairy or animal products and eats granola made with canola oil for breakfast. Linda prefers rich foods, and eats bacon, eggs, and buttered toast each morning. Which statement describes a logical inference that can be made from the provided information?
a)Butter has higher levels of saturated fats in it than canola oil.
b)Linda and Joyce both have high levels of “bad” cholesterol.
c)Butter contains a small amount of polyunsaturated fats.
d)Linda has a higher level of “bad” cholesterol than Joyce.
Answer: D: Linda has a higher level of "bad" Cholesterol than Joyce
Explanation: From the first sentence Saturated fat contributes to high level of bad cholesterol. Buttered food, bacon ( Lard) are significantly high in saturated fat which contributes to high level of bad cholesterol and that's what Linda is eating. Joyce on the other hand avoids animal products and feeds on granola from Canola oil which is low in saturated fat.
The logical conclusion base on this diet is Joyce has low level of bad cholesterol while Linda has high level of bad cholesterol
Answer: THE ANSWER IS D :)
Explanation:
In this phylogenetic tree, which two organisms on the tree would be expected to share the most characteristics?
sac fungi and cnidarians
amoebas and sponges
choanoflagellates and cnidarians
cnidarians and animals with bilateral symmetry
Answer:
Cnidarians and animals with bilateral symmetry.
Explanation:
I don't have a very good explanation as to how I got this answer, but I can tell you that I got this question right in my test. Good luck with yours. :)
Compare and contrast fermentation and cellular respiration (at least 2 similarities and 2 differences explained in detail).
Write one scientific question about the organism in the photo
Answer:
Please attach the photo of the organism.
Explanation:
Variation means which of the following?
a
Traits that are passed on will ultimately become common within the population
b
All species will produce more offspring than will survive to adulthood
c
There are variations between members of the same species
d
Traits that increase suitability to a species' environment are seen. Some traits are selected for, and some are selected against based on fitness.
Answer: C
Explanation: Generally, variation is the differences between organisms or individuals of the same species caused by either genetic differences or environmental influence. Option C is your closest answer
Think of another science topic you studied earlier. How does that topic connect to what we are learning about carbon and energy in ecosystems? Be creative! Consider how carbon in ecosystems might affect or be affected by molecules, energy, forces, Earth—either its atmosphere or oceans.
Answer:
ecosystems might affect or be affected by molecules, energy, forces, Earth—either its atmosphere or oceans.ecosystems might affect or be affected by molecules, energy, forces, Earth—either its atmosphere or oceans.
Explanation:
ecosystems might affect or be affected by molecules, energy, forces, Earth—either its atmosphere or oceans.
Round the number 14.587020 to 4 significant digits. a. 14.59 b. 14.58 c. 14.587 d. 15.00 Please select the best answer from the choices provided A B C D
Answer:
A. 14.59
Explanation:
Firstly, rounding a number means making a number simpler but keeping its value close. So rounding 14.587020 means making it look less complex but making sure the rounded value is within range of the original value.
Next, we have to know that to round a number;
* Digits below 5 (<5) rounds down the next digit to their left i.e. we leave the digits the same and turn the rounding digit to 0.
* Digits above 5 (>5) rounds up the next digit to the left i.e. we add 1 to the next digit
Next, to round to 4 significant digits means we want to see only the first four non-zero digits in our value. Note that, all non-zero digits i.e. 1-9 are significant
Hence, 14.587020 will be:
= 14.587020
= 14.58700
= 14.59000
We have four (4) digits which are non-zero already, hence we stop here and remove all zeros to the right
Hence, 14.587020 to 4 significant digits is 14.59 i.e. 14.587020 ~ 14.59
Answer:
a.14.59
Explanation:
mark 5 outta 5 add me on snap Firstly, rounding a number means making a number simpler but keeping its value close. So rounding 14.587020 means making it look less complex but making sure the rounded value is within range of the original value.
Next, we have to know that to round a number;
* Digits below 5 (<5) rounds down the next digit to their left i.e. we leave the digits the same and turn the rounding digit to 0.
* Digits above 5 (>5) rounds up the next digit to the left i.e. we add 1 to the next digit
Next, to round to 4 significant digits means we want to see only the first four non-zero digits in our value. Note that, all non-zero digits i.e. 1-9 are significant
Hence, 14.587020 will be:
= 14.587020
= 14.58700
= 14.59000
We have four (4) digits which are non-zero already, hence we stop here and remove all zeros to the right
Hence, 14.587020 to 4 significant digits is 14.59 i.e. 14.587020 ~ 14.59
HURRY BEST ANSWER GETS BRAINLIEST!
What is the function of the slip rings in an electric generator?
keeping current flowing in one direction
stopping current from leaving the generator
producing a path for current to flow
preventing the armature from spinning
Answer:
Producing a path for current to flow.
I guess.
What else are extreme sports sometimes called?
O A. Action sports
O B. Adventure sports
O C. Adrenaline sports
D. Both A and B
Can anyone solve this
Thanks
Answer:
Genes are found in their own, separate regions of DNA
Explanation:
During the light reactions of photosynthesis, why is a molecule of water split?
to provide energy for the electron transport chain
a.) to provide energy for the electron transport chain
b.) to produce electrons that replace the two electrons that were lost from the chlorophyll molecule
c.) to assist in the process that produces ATP
d.) to form NADPH
Answer:
B
Explanation:
Electrons from photosystem II go through the ECT in the chloroplast, so water is split to replace those electrons.
By which process are fossil fuels formed?
Answer:
A fossil fuel is a fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms, containing organic molecules originating in ancient photosynthesis that release energy in combustion. ... Fossil fuels contain high percentages of carbon and include petroleum, coal, and natural gas.
HOPE IT HELPS : D
Explanation:
HOw could overuse of household disinfectants weaken the immune system
Answer: A
Explanation: i tock the test alredy
Answer:
I'm assuming there are options so...
I believe the correct answer is
D. By reducing exposure to pathogens and the creation of specific memory cells
It will reduce exposure to certain pathogens and prevent you from getting sick which is good, but if you don't get those pathogens, when your body does encounter it again, your Memory T cells will. it know how to fight it off.
A red blood cell placed in distilled water will swell and burst due to the movement of Your answer: salt from the distilled water diffusing into the cell water molecules moving by osmosis into the cell water from the red blood cell moving into the distilled water
Answer:
Due to the movement of surounding water ijnto the cell.
Explanation:
A red blood cell placed in distilled water will swell and burst due to the movement of - water molecules moving by osmosis into the cell.
Osmosis is the movement of water that diffuses from a higher water concentration area to a lower water concentration area.
The distilled water outside the red blood cell, since it is 100% water and no salt, is hypotonic to the red blood cell.The red blood cell will gain water, swell ad then burst.Thus, a red blood cell placed in distilled water will swell and burst due to the movement of - water molecules moving by osmosis into the cell.
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Please Help Mark and Vikki live in two different areas of North America. The temperature in Mark’s town today is 30°F. The temperature in Vikki’s town is 82°F. In both towns, the relative humidity is 90%. Is the amount of water vapor in the air the same in Mark’s and Vikki’s towns? Explain your answer. Also Talk about which one has more water vapor
Answer:
I assume there could be a change in water vapour in the weather as the coldness and the clouds in the city of Mark will transform into ice and fall like snow. And it is really warm in the town of Vikki, and the vapour of water may fall as rain.
Explanation:
I assume there could be a change in water vapour in the weather as the coldness and the clouds in the city of Mark will transform into ice and fall like snow. And it is really warm in the town of Vikki, and the vapour of water may fall as rain.
See above
Please mark brainliest
Hope this helps.
Earth's crust and uppermost mantle form the
Answer:
The lithosphere
Explanation:
The upper mantle is in between the lower mantle and the earths crust Crust. In other words, the outer most solid shell of the earth. The earth's crust and uppermost mantle form the lithosphere.
Hope this helped!
Answer:
lithosphere
Explanation:
Which life-forms appear to be extinct?
a. Sponges, Insects, and flowering plants.
b. Bony fishes, dinosaurs, and mammals
c. Sponges, insects, reptiles
d. trilobites, ammonoids and dinosaurs
Which life-form was most abundant 250 million years ago?
a. dinosaurs
b. reptiles
c. bony fishes
d. trilobites
Answer:
D for the first question and B for the second
Explanation:
trust
Answer:1.) D (trilobites, ammonoids and dinosaurs)
2.) B (reptiles)
Explanation:
Based on the graft
DNA and RNA are frequently
Answer:
A
Explanation:
I know because I actually just learned this yesterday lol. DNA gets transcribed then tRNA translates the mRNA to know what amino acids to make.
hope it helps and I can explain more if you need.
1.01: Exploring Life 1. What is biology? 2. What is the difference between science and pseudoscience? 3. What is needed for an idea to be scientifically reliable? 4. What questions can be answered through science? 5. What is the scientific method? 6. What are the steps of the scientific method? 7. What are variables in an experiment? a. Independent b. Dependent c. Control 8. What is a law? 9. What is a theory?
What would be the mRNA base sequence formed from ACC CTG GTA GCT
Answer:
Explanation:
DNA utilizes four bases, adenine (A), guanine (G), cytosine (C), and thymine (T), in its code. RNA also uses four bases. However, instead of using 'T' as DNA does, it uses uracil (U). Therefore, if your DNA sequence is 3' T C G T T C A G T 5', the mRNA sequence would be 5' A G C A A G U C A 3'.
In which squares should the phrase “Yellow pods” appear?
The given question is incomplete however the correct question and the flow chart is related to the question as follows:
The flowchart below shows the three generations of a cross between a pea plant that has yellow pods and a pea plant that has green pods. yellow pods are the dominant trait. The flowchart is missing the labels that describe the traits.
In which squares should the phrase “yellow pods” appear?
1. A and D
2.B and E
3. A, C, and D
4. A, B, C, D, and E
Answer:
The correct answer is: 3. A, C, and D
Explanation:
According to Mendel’s laws of inheritance, when a plant with the dominant trait is crossed with a plant with a recessive trait, as a result, the dominant phenotype appears in all the F1 offspring. On Self cross F1 offspring, produces F2 offspring with dominant and recessive traits.
In the given scenario, pea plant with ‘yellow pods’ are dominant and pea plant with ‘green pods’ is recessive.
Therefore, when pea plant with yellow pods is crossed with the pea plant with the green pod, the F1 offspring (C) produced are with yellow pods.
Thus, parent (A) is with yellow pods and F2 offspring (D) is with yellow pods.
__________ are the methods of reproduction.
Sexual & Gamete
Sexual & Asexual
Asexual & Monosexual
Asexual & Respiratory
Answer:
The answer is sexual and asexual.
Responding to the environment is a characteristic of life best shown by which example
Answer:
there are no examples provided
Explanation:
sorry I can't help without the examples
