Grade 7 life science

Grade 7 Life Science

Answers

Answer 1

Answer:

RNA leaves the nucleus during the process and DNA remains in the nucleus

Explanation:

DNA cannot leave the nucleus which is why RNA is made. A certain type of RNA, called mRNA (a.k.a. messenger RNA), leaves the nucleus to form proteins

Answer 2

Answer:DNA transforms from a nucleic acid into a protein, and RNA remains a nucleic acid


Related Questions


Which climate factor is the best option for city planners to consider when trying to
mitigate the urban heat island effect?


A) Latitude

B) Vegetation

C) Elevation

D) Proximity to Ocean

Answers

Answer:

its B but there is small possiblity for D to be the answer.

The answer is B for sure

Describe the flow of energy in this food chain. Be sure to use the names of the organisms and what role they serve in the food chain (producer, consumer, or decomposed). If ab organism is a consumer identify whether it is an herbivore or carnivore or omnivore.

Answers

The tree is the producer. Then, the tree leaves are eaten by the caterpillar, who is a herbivorous consumer. Then, the caterpillar is eaten by the bird, who is an omnivorous consumer.

There is no decomposer or carnivorous consumer shown in this flowchart.

What statement best explains why evidence of glaciers appeared in south africa millions of years ago

Answers

Answer:

Theory of continental drift

Explanation:

The response to selection can be calculated as ______________________________. a. additive genetic variance times the selection differential b. additive genetic variance times phenotypic variance c. additive genetic variance divided by phenotypic variance d. heritability times the selection differential e. heritability times the selection gradient

Answers

I'm not sure but but i think the answer will be:

A. additive genetic variance times the selection differential.

Answer:

A. additive genetic variance times the selection differential

Explanation:

The response to selection can be calculated as additive genetic variance times the selection differential

- Sumin -

How does a living thing exist and interact within the various levels of organization in a community’s ecosystem?

Answers

An ecosystem is a society made up of living and nonliving things interacting with each other. Abiotic things do not develope, need food, or reproduce.

What are the interactions between the levels of organization in the biosphere?

Levels of organization in ecology contain the population, society, ecosystem, and biosphere.

An ecosystem is all the living things in a region interacting with all of the abiotic parts of the surroundings.

Thus, An ecosystem is a community-driven up of living and nonliving things interacting with individual.

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100 POINTS!!!!-What type of feedback mechanism is being shown in the image below?
Question 1 options:

Positive


Negative


Electrical

Answers

Answer:

Postive

Explanation:

Because its the food chain

In a California kelp forest, the garibaldi, the purple sea urchins, and the rocks make up whic of the following? Select all that apply.

a population

part of a community

part of an ecosystem​

Answers

Part of a community

Part of an Ecosystem

In a California kelp forest, the garibaldi, the purple sea urchins, and the rocks make up part of a community and part of an ecosystem​. Therefore, option B and C are correct.

What is ecosystem ?

All the organisms and the physical setting they interact with make up an ecosystem. The nutrition cycles and energy flows connect these biotic and abiotic elements. Photosynthesis is how energy enters the system and is absorbed by plant tissue.

Abiotic variables, or nonliving components, coexist with biotic components in ecosystems. Plants, animals, and other species are biotic factors.

Healthy ecosystems maintain our soil, clean our air, control the climate, recycle nutrients, and give us food. They offer resources and raw materials for making medications and other things. They support our economies and are the cornerstone of all civilizations.

Thus, option B and C are correct.

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14. Which words from the passage show the author's bias toward monarch butterflies? A "Eventually, monarchs reach homes as far north as Canada." B "Most monarch butterflies never live more than two months." c "These beautiful creatures are amazing to watch..." D "They beat their wings slowly and glide so they do not tire too easily."​

Answers

Answer: C: "These beautiful creatures are amazing to watch."

Explanation: Bias is where an author adds their personal opinion on a topic such as this one on monarch butterflies.  Sometimes, authors use bias and it gets away from the facts and the credibility that the topic should bring.  In option C, the words "beautiful" and "amazing to watch" steers the reader away from the actual topic with their personal opinions.  The other options from the passage include facts about the monarch butterflies and resisting the urge to add comments about how beautiful or interesting they are.

Hope this helps! :)

i need calculation
Site 1 undisturbed
Species Total individuals in 5 quadrats
A 228
B 37
C 21
D 40
E 45
F 39
G 3
H 10
Site 2 disturbed
Species Total individuals in 5 quadrats
A 11
B 4
C 14
D 2
E 1

Answers

Answer:

Explainer

you multiply that number then you provide the last number of your digits men seem to be answer and then explain it and then like draw and example how you draw.

They are located inside the nucleus of animal and plant
cells and can ONLY be seen under the microscope when
the cells
This can happen during:

Answers

Answer:

they are the chromosome

Explanation:

If a newborn baby weighs 8 pounds and 4 ounces how much does it weigh in grams

Answers

3856 :)

Have a good day

Answer:

3810.18 value 454

Explanation:

if the baby is 8 pounds and 4 oz

In RNA, the nucleotide _______ is used in place of thymine in DNA. In eukaryotes, mRNA is transcribed in the _______ and then transported to the cytoplasm for translation. tRNA molecules physically link the mRNA message and the _______ it encodes for. The ribosome is made of proteins and _______.

Answers

Answer:

1) Uracil
2) Nucleus
3) Amino acid
4) RNA (rRNA)

Explanation:

There's also more information here
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which of the following correctly describes how a diagram how a cellular respiration would differ from a diagram of photosynthis

Answers

Answer:

Explanation:

1.  Which of the following correctly describes how a diagram of cellular respiration would differ from a diagram of photosynthesis? The cellular-respiration diagram would show electromagnetic waves as the final product. The cellular-respiration diagram would show glucose as the main source of energy.

: )

Integrated pest management (IPM) utilizes all of the following methods except


A. limiting the use of low-toxicity pesticides like boric acid

B. spraying plants with broad-spectrum pesticides

C. encouraging pest's natural predators to settle on crops

D. genetic modification of plants to produce natural pesticides

Answers

C.encouraging pests natural predators to settle on crops

In a controlled experiment, what is the experimental group compared to?

A. Control group
B. Source of error
C. Experimental group
D. Research question

Answers

Answer:

Your answer is A) Control group.

Explanation:

The control group and experimental group are compared against each other in an experiment. The independent variable is "controlled" or held constant in the control group. Hope this helped :)

I need 2 words to fit in after these

Answers

Answer:

chromosomes,. double

Explanation:

as you know choromosomes replicat and will be double

What enzyme is necessary to permanently link the digested foreign and plasmid DNA together to form the recombinant DNA molecule? How does this enzyme work?

Answers

Answer:

The enzyme that is needed to permanently link the digested foreign and plasmid DNA together to form the recombinant DNA molecule is DNA Ligase. it is often used to insert genes as well as other pieces of DNA into plasmids during the cloning of DNA.

what is mean by universe

Answers

Answer:

The universe is everything. It includes all of space, and all the matter and energy that space contains. It even includes time itself and, of course, it includes you. Earth and the Moon are part of the universe, as are the other planets and their many dozens of moons.

Explanation:

hope it can help

The universe is made up of dust, plants , stars ,you, and me so universe means everything that is in it

write about Archimedes principle​

Answers

Answer:

Archimedes principle states that when a body is totally or partially immersed in a fluid, it experiences an upthrust which is equal to the weight of the fluid displaced.

What atom makes up the spleen

Answers

Answer:

white and red pulp

Explanation:

hope this helps

Which of the following are roles fungi can play in the environment? Check all that apply


predators


parasites


decomposers


mutualists

Answers

Answer:

decomposers,mutualists

Explanation    

must be the answer

19. Which of these has a unique culture?
a. society as a whole
b. corporate employers
c. Both A and B
d. Neither A nor B

Answers

C can be the answer

Answer:

a

Explanation:

it's A because in a society we have lots of people coming with different type of cultures and every culture is unique

Why is ETC considered an aerobic process?

Answers

Answer:

It requires oxygen as a terminal oxygen acceptor

The ETC requires oxygen, which means that it is an aerobic process. It takes place in the folds of the inner membrane of the mitochondria. These folds are called cristae. In this step of cellular respiration, electron carriers NADH and FADH2 drop off the electrons they've carried from the citric acid cycle.

What lead up to the dust bowl and it’s dust storms?
A. A volcanic eruption blew ash into air
B. Earthquakes caused large rocks to crumbled
C. Excessive surface irrigation caused water erosion
D. Drought killed off plant life, leaving soil uncovered

Answers

Drought killed off plant life, leaving soil uncovered lead to the dust bowl and dust storm.

What is Dust bowl?

Dust bowl refer to occurence of severe dust storms that cause destruction on the ecology and agriculture of the American and Canadian territory in the fall 1930s. Dry wind and choken storm covery the plains of United State and Canada and this lead to severe drought. It was after rainfall, that dust bowl was totally destroyed.

Therefore, Drought killed off plant life, leaving soil uncovered lead to the dust bowl and dust storm.

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match the following ​

Answers

Answer:

1 b

2 a

3 d

4 c

Hope U GET YOUR ANSWER

PLEASE MARK AS BRAINLIST

What is artificial selection?

Answers

Answer:

D. when humans breed an animal for a certain trait

Explanation:

In order for something to be defined as artificial selection it requires human interference, D is the only answer where humans are mentioned; Therefore it's the correct answer and a example of artificial selection

Answer:

The answer to your question would be d

Explanation:

because artifical is humans picking what happens. and natural would be nature picking the traits

Explain symbiotic relationship with examples. ​

Answers

Answer:

the first thing that came to mind for me was marriage between a husband and his wife. they take care or each other. if one is sick, the other helps them to feel better. if one needs attention, the other when possible will give it to their spouse. in the long-run, the husband will be able to help his wife, and likewise, the wife will be able to help her husband.

hope this helps :)

if so, please mark as brainliest

In addition to natural factors, human activity can also alter ecosystems. Conduct research on a human activity that
currently affects or can theoretically affect your chosen ecosystem. Use your food web model to explain how this
change can affect the competition for food resources.


Answers

The human activities in addition to natural factors that can alter the terrestrial ecosystem is deforestation.

The effects of deforestation on food web

Deforestation is a the clearing of trees in a large area of land which can be purposeful or by nature.

Human activities that leads to clearing of trees include the following:

agricultural expansion,

cattle breeding,

timber extraction,

mining,

oil extraction,

dam construction and infrastructure development.

One of the negative effects of deforestation on food web is the reduction in food availablity. This is so because of the loss of biodiversity that are source of food to man.

The human activities in addition to natural factors that can alter the terrestrial ecosystem is deforestation.

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Which of the following correctly describes a positive way in which hydrogen fuel cell technology can affect environmental quality or way of life?

It is easy to store safely and distribute globally.
It allows for the same efficiency as gasoline-run engines.
It can be used to power small and large electrical systems.
It can only be used without combining with other energy resources.

Answers

The statement that correctly describes a positive way in which hydrogen fuel cell technology can affect environmental quality or way of life is It is easy to store safely and distribute globally.

What is Hydrogen fuel cell technology?

Hydrogen fuel technology is the technology in which electricity or water or heat are generated in electrochemical cell when Hydrogen react with oxygen.

Therefore, The statement that correctly describes a positive way in which hydrogen fuel cell technology can affect environmental quality or way of life is

It is easy to store safely and distribute globally.

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Answer:

this is not the answer  It is easy to store safely and distribute globally.

Explanation: i got it wrong

What happens to ideas in science?
A. They become theories that no one is allowed to question.
B. They rarely influence the way people live their lives.
C. They are modified or replaced as new ones are developed.
D. They are never replaced or shown to be inaccurate.

Answers

Answer:

C

Explanation:

as technology advances, we learn more about the world and we realize that some things we used to think are wrong.

an example of this would be when ancient people thought the sun revolves around earth. Now we know that the earth revolves around the sun

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