Please help asap , I’m very confused .

Answers

Answer 1

50% or 2:4.

Explanation

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QUESTION 14
Scientists state that burning fossil fuels is a big threat to our clean air. What else could be a threat to our supply of clean air?

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Vehicle exhaust fumes are also a threat to our air supply of clean air. It is means of transportation for a majority of the population whether it is a personal car or a ride on public transportation. It produces carbon dioxide and other greenhouse gases that keep heat trapped in the earth’s atmosphere.

Which of the following should be a characteristic of a stable ecosystem?
O A high number of predators and a lesser number of producers
O A lack of interdependence of organisms
O An increase in human interference
O An abundance of biodiversity

Answers

Answer:

Explanation:

A is incorrect because that would make the prey species lesser and predators would die of starvation. If organisms were not dependent on each other then no herbivores would live there, then carnivores would die or leave. C is incorrect because human interference would lead animals to be reliant on humans, or pollution may occur. D is the only reasonable answer.

The correct option is D. An abundance of biodiversity is the characteristic of a stable ecosystem.

What is stable ecosystem?

Sustainability has a crucial implication for ecosystem stability. Even in the face of disruption, the structure and operation of a healthy ecosystem ought to be steady throughout time.

The ecosystem ought to be able to quickly recover if a stressor or disturbance does cause it to change.

Frequency and intensity of disturbance (how often and what kind of tillage). The most stable ecosystems are found in oceans. Other terrestrial ecosystems experience modifications and biotic component succession. Oceans, however, are steady over a very long period of time.

Therefore, The correct option is D. An abundance of biodiversity is the characteristic of a stable ecosystem.

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If the temperature of the tissue samples used in the experiment had been raised from 37°C (body temperature) to 50°C, the results would have been different because

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Answer:

75%sorry i need to complete the steps

Tissue samples are stored at normal body temperature.The average temperature of our body is 98.4°F or 37°C.Just imagine that how do you feel when the temperature of your body increases to 50°C.Obviously you feel ill and it will harm you Tissues are our body parts so same thing happen to them .It can change experiment results

what would have the greatest long-term impact on reducing the amount of carbon dioxide in the air
1. Decreasing the number of livestock on a farm
2.planting trees around a farm
4. Cutting down trees around a farm
5. Increasing the number of live stock on farm

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Answer:

2 planting trees around a farm

Explanation:

afforestation is one of the ways to reduce carbon dioxide in the air because during photosynthesis carbon dioxide is absorbed by the plant which in return give us oxygen

Fill in the blank...

Question: Matter____ ecosystems.

Options:
A. flows out
B. is found only in
C. stays in the same parts of
D. cycles around

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The answer is D. it cycles around

What would a scientist need to do before he or she could remove a gene from a chromosome?

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Pay attention to nervous and make sure the genes is being moved, nothing else

PLEASE HELP ME WITH MY BIOLOGY PROBLEM!! WILL GIVE BRAIN?!

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RY since they’re both co DOMINATE and not recessive.

PlLEASE HELP ME> I NEED THIS ANSWER RIGHT NOW. The bass and crayfish likely “died off” because the rapid growth of the algae eventually caused the level of dissolved oxygen to decline to a point that these oxygen-dependent organisms could no longer survive. How would you modify this investigation of the pond organisms to determine if the algal bloom really was the cause of the bass and crayfish die-offs?

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Answer:

bacteria blooms and decreased underwater photosynthesis causes hypoxia, killing the fish. c. floating algae die, increasing sunlight penetration and heating the water. ... This has led to algal blooms in the pond which periodically reduce the amount of dissolved oxygen available in the water

Explanation:

mrk me brainliest plzzzzz

A particular organism has the following characteristics:
• It is single-celled.
•It does not have a nucleus or membrane-bound organelles.
•It is autotrophic, meaning that it makes its own food.
•It is able to replicate without a host cell.
Which of the following types of organisms is the type described above?

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Answer:

Prokaryotic cells

Explanation:

Which were likely the closest to early animals?
A.) Mosses
B.) Colonial protists
C.) Algae

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it's colonial protists im pretty sure

A student performs the reaction shown below:
NaOH + HCl → NaCl + H2O

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Answer: it’s a neutralization reaction

Explanation:

Which of these is an example of an environment in which natural selection would not occur?

Group of answer choices

A. There is genetic diversity in the population due to mutation and/or sexual reproduction.

B.All offspring have the same chance of survival.

C. Offspring inherit beneficial and detrimental traits from parents.

D. Some offspring have a physical trait that helps the organism compete more successfully.

Answers

ummm I’m not to sure but i believe a and d

An example of an environment in which natural selection would not occur is a place where all offspring have the same chance of survival. Thus, the correct option for this question is B.

What is Natural selection?

Natural selection may be defined as a type of strategy or process in nature through which organisms particularly gets better adapted to their environment and tend to survive and reproduce more than those less adapted to their environment.

Genetic diversity always favors the process of natural selection to occur. And this genetic diversity is generally induced by evolutionary forces like genetic drift, mutation, migration, etc.

Apart from this, offspring inherit beneficial and detrimental traits from parents and offspring have a physical trait that helps the organism compete more successfully and are also more prone to natural selection.

Therefore, an example of an environment in which natural selection would not occur is a place where all offspring have the same chance of survival. Thus, the correct option for this question is B.

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How much energy consumed is lost to waste?

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Answer: To begin with, it shows that more than half (58%) of the total energy produced in the US is wasted due to inefficiencies, such as waste heat from power plants, vehicles, and light bulbs. In other words, the US has an energy efficiency of 42%.

Explanation:

Answer off internet

Please give brainliest

If the trait is DOMINANT and you cross two red rose (Rr) heterozygous, what is the probability of having white flower of offspring will be

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There would be one RR and two Rr and there would be only one rr so it would be 25% of a white flower

A map here shows the motion of a tectonic plate off the coast of the western United States. Which evidence supports the theory of
plate tectonics in this region? Select ALL that apply.
es )
A)
A trench forming in the Pacific is widening.
B)
The ocean levels are rising along the western coastline.
0
The Pacific Ocean is deeper than the other oceans of the world.
D)
Active earthquakes occur on the western coast of the United States.
E)
The mountains on the western coast are newer than other mountains in
the United States.
Earth and Space Science
SE65 Theory of Plate Tectonics
ID: 532164
Hint

Answers

The answers are A B and C according to my sources…

An oceanic tectonic plate in the eastern Pacific Ocean basin off the west coast of South America is called the Nazca Plate, sometimes known as the Nasca Plate, after the Nazca region of southern Peru. Thus option A, B, C is correct.

What tectonic plate off the coast of the western US?

The continent of North America is located on the oceanic plate to the east, while the Pacific Plate is the oceanic plate to the west. However, in the geologic past, there was another oceanic plate to the west known as the Farallon plate.

The triple junction will continue to be defined by the western margin of the North American plate along the Cascadia Subduction Zone as the boundary between the two plates.

Therefore, The Pacific Ocean is deeper than the other oceans of the world and the ocean levels are rising along the western coastline.

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what sequence of amino acids does the following chain of mRNA code for?
AUG GUA UCU GCA UGA CGU AGC GGU GAA UAG

Answers

Answer:

Met-Val-Ser-Ala-TERM(stop)

Explanation:

PLEASE I NEED HELP ASAP- will give 100 points

Create a typewritten paper describing the carbon cycle.
a) Type several paragraphs describing the full carbon cycle in detail.
i. Discuss all components of your poster, as outlined in step 3.
ii. Describe the exchange of carbon through carbon-containing compounds between an
organism and the environment.
iii. Describe the contributions of photosynthesis and cellular respiration within and among
the four spheres. Discuss how carbon enters and leaves each of the four spheres and in
what forms.
iv. Discuss the role of carbon storage in organisms.
b) Click “Enter” on your keyboard a few times to leave enough space to answer the following
question.
i. How is a model of the carbon cycle different from the actual cycling of carbon in an
ecosystem?
c) Make sure your paragraphs include correct sentence structure, punctuation, grammar, and
spelling.

Answers

Explanation:

The carbon circle Is a circle of relating carbon t

Movement form one place to another

Answer:

not sure how helpfull this will be but i tried

Explanation:

Over millions of years
break down organisms into
fossil fuels, which contain carbon molecules. These carbon
molecules are then used in photosynthesis by
to make
oxygen for living organisms.
-decomposers, consumers
-decomposers, producers
-consumers, producers
-producers, consumers

Answers

Answer:

Explanation: "-decomposers, producers"

Which of the following is true?
• Each population of organisms contains many different species.
• Every ecological community is based on one population of organisms.
• Every frog in an ecosystem belongs to the same population.
• Each population of frogs in an ecosystem is made up of members of one species.

Answers

Answer: a

Explanation:

need help pls would really appreciate it

Answers

Answer:

Other seals, leopard seal, penguins

Explanation:

Radioactive element ‘A’ decays over time to element ‘B’. Element ‘A’ has a half-life span of 5 days. If you started with 20 grams of A and 0 grams of B, how many grams of B would there be after a total of 10 days?

1) 0 grams

2) 2.5 grams

3) 5 grams

4) 7.5 grams

5) 10 grams

6) 12.5 grams

7) 15 grams

8) 17.5 grams

9) 20 grams

10) 22.5 grams

11) 25 grams

12) 27.5 grams

Answers

The correct answer is 27.5 grams

Explain how extinction affects biodiversity.

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The species that are unable to adapt to environmental changes become extinct. This reduces biodiversity.

Species that are too closely interbreed can go extinct as mistakes in the DNA accumulate in the population. All forms of extinction cause reductions in the remaining biodiversity

Review the chart, which shows the population sizes of three African animals in 1990 and 2000.

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Answer:

lion and cheetah populations compete for the food source of zebras ,and lions outcome cheetahs

a section of DNA on a chromosome that has genetic information for one trait.

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The answer is gene. The gene is a segment of a dna molecule that codes for a particular protein and determines the traits of the individual.

It critical that all of the cell's DNA is copied during the synthesis phase, prior to cell division because the cell is going to divide into two new cells, so the DNA must first be copied so each daughter cell receives a full set of genetic information.
True
False

Answers

Answer:

True

Explanation:

As,

DNA needs to be duplicated before the cell divides so that both new cells have the same amount of DNA

A third-level consumer must be which type?
Carnivore
Herbivore
Producer
Decomposer

Answers

The answer is : Carnivore

Answer:

i think answer is producer

!!will mark brainliest!!
-What genotypes would the parents have to be to have a child with hemophilia?

Answers

Answer:

If the father has hemophilia and the mother DOESN'T the daughters any will have and the sons won't. If the moms have it and the dad doesn't that means all of the sons will have it and the daughters won't

Explanation:

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Answer:

Male/Dad: XhY

Female/Mom: XHXh

Explanation:

Hemophilia is a sex-linked recessive disorder. Due to this, this means that the genotypes of those affected would be:

XhXh (female)XhY (male)

Doing a quick punnet square using XhY x XHxH would equal to 25% XHXH (unaffected female), 25% XHXh (female carrier), 25% XHY (unaffected male), 25% XhY (affected male).

Correct me if I'm wrong, please!

Part E
Your molecular clock model resembles another branching chart, the phylogenetic chart, which you've
used in this unit. Review the sample phylogenetic chart. What types of data are used to build a
phylogenetic chart? How do phylogenetic charts differ from molecular models, such as the molecular
clock model?

Answers

Answer: I do not know if this is correct, but this is what I answered.

Explanation:

Answer:

There are many types of data that a phylogenetic chart can use such as morphological data, such as structural features, types of organs, and specific skeletal arrangements; genetic data, such as mitochondrial DNA sequences, ribosomal RNA genes, and any genes of interest. Phylogenetic charts differ from molecular modes in many different ways such as the following. The phylogenetic charts considers various data types such as morphological data,molecule data, and behavorial data. On the other side, the molecular only considers one kind of data, that is, the genetic founded data.

Explanation:

A key part of the Watson-Crick model came when Watson realized
that adenine could form hydrogen bonds with thymine and guanine
could form hydrogen bonds with cytosine. This explains why A=T
and G C in Chargaff's rules. Also, these two hydrogen-bonded
nucleotide pairs had the exact same width, so they could form the
rungs of the DNA ladder.
The fact that these pairs could match up only in this way meant that
the sequence of bases in one strand could determine the sequence
of bases in a second strand created from the first. The second strand
is said to be complementary to the first strand. Individual bases are
paired so that the identity of any base determines the identity of the
base paired with it; that is, the complementary base.
This table lists the base abbreviations for bases in a sample of single-
stranded DNA. Fill in the second column with the base abbreviations
that are complementary to the given bases.
I

Answers

Answer:

A–T

T–A

C–G

A–T

G–C

C–G

T–A

A–T

Explanation:

A always pairs up with T

C always pairs up with G

A - TT - AT - AC - GA - TG - CG-CC - GT - AA - T

A usually pairs up with TC usually pairs up with GThese are bases of amino acids called nucleotides sequences. And this helps in the bond of several base pairs to their nucleotide sequence.What is the Watson-Crick model?

In “A Structure of Deoxyribose Nucleic Acid,” Watson and Crick defined DNA as a double helix that contained long, helical strands wound together. In their model, every DNA strand contained personal devices referred to as bases, and the bases alongside one DNA strand matched the bases alongside the opposite DNA strand.

Thus it is clear that the above answer is well explained.

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What made the 1918 flu virus so deadly?

Answers

Explanation:

The virus killed people directly by causing massive hemorrhages and edema in the lungs. Modern analysis has shown the virus to be particularly deadly because it triggers a cytokine storm (overreaction of the body's immune system

Answer:

it killed people directly by causing massive hemorrhages and edema in the lungs. Modern analysis has shown the virus to be particularly deadly because it triggers a cytokine storm overreaction of the body's immune system.

Explanation:

I hope this helped :)

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