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Which of the following instruments can be used to observe cells?

A. Barometer

B. Microscope

C. Periscope

D. Telescope​

Answers

Answer 1

Explanation:

thats option B

a microscope

Answer 2

Answer:

B. Microscope

Explanation:

A microscope is an instrument that can be used to observe small objects, even cells.

Hope it helps!!! brainliest pls!!!

Related Questions

The type of molecule represented below is found in organisms.

Which statement correctly describes the sequence of bases found in this type of molecule?

A) It changes every time it replicates

B) It determines the characteristics that will be inherited

C) It is exactly the same in all organisms

D) It directly controls the synthesis of starch within a cell

Answers

Answer:

B) It determines the characteristics that will be inherited

Explanation:

The molecule is DNA (it has a double helix structure) which contains genetic information needed for every living organism.

Hope this helps!

Answer:

D

Explanation:

A and C are so incorrect. The reason why D is the correct answer is because DNA does not determine what gets inherited, just what gets added to the gene pool.

DNA does however control the synthesis of proteins by acting as instructions. Then these instructions are read and carried out by RNA to finally complete the process.

Hope this helps!

Which renewable energy resource comes from burning plant material.

Answers

Answer:

Biomass

Explanation:

Biomass is renewable organic material that comes from plants and animals. Biomass was the largest source of total annual U.S. energy consumption until the mid-1800s. Biomass continues to be an important fuel in many countries, especially for cooking and heating in developing countries

Create 5 unsafe scenarios that could happen in the lab, school, or home and 5 solutions for those unsafe situations.
Example:

Unsafe:

Janice was working on a project and accidentally cut the cord to one of the glue guns. Afraid that she would get in toruble, she quietly placed the glue gun back in the bin. Another student used the glue gun and was injured.

Safe:

Janice was working on a project and accidentally cut the cord to one of the glue guns. Eventhough she was afraid, she let Ms. Smith know immediately. No one else was able to use the glue gun and no one was hurt.

Answers

5 unsafe
- not wearing glasses and accidentally getting some hazardous liquid in your eye
- Not wearing a helmet when riding a bike and falling
- leaving the stove on overnight and starting a fire
- putting a piece of paper over a candle and starting a fire
- eating expired medicine by accident
Solutions
-calling a teacher or trusted adult and put water in your eyes
- wear a helmet and if you have severe injuries go to the hospital or tell a trusted adult
- calling 911
- calling 911 and leaving the house and making sure everyone is out
- call poison control and try to throw it up

Hope this helped

how many strands of dna are transcribed for gene?

Answers

Answer:

one strand

Explanation:

because they separate

Q. how many strands of dna are transcribed for the gene?

A. One strand

Which of the following might occur if people fail to conserve water? a. Increased sewage system failures b. Increased numbers of natural pollution filters c. Increased water supply d. Increased wildlife habitats.

Answers

Answer:a

Explanation:edge 2022

If people fail to conserve water then there will be increased sewage system failures.

Water conservation entails keeping water from assets like rain, wastewater, and snow melting using it for family and agricultural activities. Increased sewage gadget disasters can not preserve water as this water comes from toilets, sinks, bathing, laundry, etc. That is wastewater and contaminants ought to be eliminated from it to make it appropriate for reuse. Failure of sewage gadget will now no longer be capable of taking away pollution from this water and therefore this can not be reused.

What is a water sewage system?

These are 3 types of water sewage systems: separate system combined system partially separate system.

Hence concluded that if people fail to conserve water then there will be Increased sewage system failures.

To learn more about sewage systems refer to the link :

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18. Does the blood of the mother and the baby ever mix?

Answers

Answer:   No

Explanation: Usually a mother and baby's blood do not mix while the baby is in the womb. The mother's blood runs alongside the placenta, and the nutrients needed by the baby are absorbed and transferred to him/her.

Answer:

yes it does

Explanation:

because the mother is one half of the whole required to make a child

The light reactions take place in the _________ and the Calvin cycle takes place in the _________. thylakoids; stroma chloroplasts; mitochondria inner membrane; outer membrane stroma; thylakoids mitochondria; chloroplasts

Answers

Answer:

thylakoids; stroma chloroplast

Explanation:

Light reactions take place in the thylakoid. The Calvin cycle takes place in the stroma chloroplast.

100 Points y'all!!!!!!!!!!! Will mark brainliest too!
Lionfish are native to the tropical waters of the Indo-Pacific. What conclusions can be made about the impact of ocean warming on the range of lionfish and, therefore, on biodiversity?

Rising ocean temperatures have expanded the range of the lionfish; with little competition, it consumes smaller fish, reducing biodiversity.
Global warming has forced the lionfish to warmer waters where it is able to mate with native fish, increasing biodiversity.
Climate change has restricted the habitat of lionfish. It has become an endangered species, reducing biodiversity.
Lionfish thrive in high carbon dioxide environments; they eat all of the native species in the area, reducing biodiversity.

Answers

Answer:

Rising ocean temperatures have expanded the range of the lionfish; with little competition, it consumes smaller fish, reducing biodiversity.

Explanation:

As ocean temperatures have increased, the range of the lionfish has increased. As a top predator, it has little competition for eating smaller fish, causing massive destruction by eating endangered fish, reducing biodiversity.

6. Based on the food web above, hunting of sharks by humans has increased in international waters. How
will the increase in humans hunting sharks affect the rest of the food web? (5 pts)

Answers

Answer:

Short term: The fish (that sharks feed on) increase, the aquatic plants decrease

Long term: The fish (that sharks feed on) decrease, the aquatic plants increase

Explanation:

Short term: The fish increase because the sharks that used to feed on them decrease hence they get eaten less. The increased fish eat a lot of plants hence aquatic plants decrease.

Long term: The increased fish will then compete for the few aquatic plants present. Only the stronger fish survive hence most fish starve and die. Less fish means that the aquatic plants are being eaten less thus the aquatic plants increase.

why chlorophyll b is not found in alll eukaryotes

Answers

Answer:

All plants, algae, and cyanobacteria which photosynthesize contain chlorophyll "a". A second kind of chlorophyll is chlorophyll "b", which occurs only in "green algae" and in the plants.

The endosymbiotic theory explains the:____.
a. Evolutionary relationship between animals, plants, and fungi.
.b Origins of mitochondria and chloroplasts in eukaryotes.
c. Method of reproduction in protists.
d. Origin of the first prokaryotic cells.

Answers

Answer: The endosymbiotic theory explains the Origin of the first prokaryotic cells

D. Origin of the first prokaryotic cells

Explanation:

The picture above represents a small section from the periodic table. Which of the elements has chemical properties most similar to element X?

A.
Element 1

B.
Element 2

C.
Element 3

D.
Element 4

Answers

The elements which has chemical properties most similar to element is element 1

Option A is the only correct answer

Carbohydrate stored in the muscles of a marathon runner is converted to available glucose during a race. This conversion is
controlled by the hormone
(A)Adrenalin
(B)insulin
(C)thyroxin
(D)testosterone

Answers

(A) Adrenalin
It’s adrenalin because when you’re excited, adrenaline rushes in your body

Second exposure to the pathogen

A-leads to very rapid production of antibodies
B- alerts memory cells to divide quickly
C - leads to the destruction of the pathogen before the individual feels infected
D - all of the above

Answers

The answer is C to this question

Two cats have different parents. One cat has stiff fur, and the other cat has soft fur. Why do the cats have different fur softnesses?

a
The cats have different versions of the gene for fur softness. The genes are softer in the fur of one of the cats.
The cats have different versions of the gene for fur softness. The genes are softer in the fur of one of the cats.

b
The cats have different versions of the gene for fur softness, which instruct for different proteins that connect in different ways to make different kinds of fur.
The cats have different versions of the gene for fur softness, which instruct for different proteins that connect in different ways to make different kinds of fur.

c
Each cat has different fur softness because offspring from different parents will have different fur softness.
Each cat has different fur softness because offspring from different parents will have different fur softness.

d
Each cat has different traits for fur softness because they have different versions of the gene for fur softness that connect together to make different kinds of fur.

Answers

Answer:

according to my search, the answer is C.

Explanation:

some breeds and types of cats have inherited thicker or softer coats because they are used to colder climates. Some cats also inherit the softness of their fur from their parents. Certain breeds, for example, the Ragdoll Cat, are ragged and hairy and have thick coats.

Which of the following is not a possible consequence of surface mining? a. increased pollution b. improved ecosystem health c. destruction of flora and fauna d. erosion of soil

Answers

Among these, a not possible consequence of surface mining "B" is improved ecosystem health.

What is surface mining and how does it affects the environment?

Surface mining is a method of extracting minerals near the surface of the Earth. The three most common types of surface mining are open-pit mining, strip mining, and quarrying.

The environmental impact of mining includes erosion, formation of sinkholes, loss of biodiversity, and contamination of soil, groundwater, and surface water by chemicals from mining processes. The environmental effects of surface mining include;

Habitat destructionSoil erosionAir pollution from dust particles

All surface mining techniques negatively affect the environment, though some methods are more damaging than others.

Thus, improved ecosystem health is not a consequence of surface mining.

To learn more about surface mining click here:

https://brainly.com/question/18329950

Answer:

The answer is B

Explanation:

:)

What are some ides you have heard of for climate change

Answers

Answer:

Ans:

Explanation:

Make your voice heard by those in power. ...

Eat less meat and dairy. ...

Cut back on flying. ...

Leave the car at home. ...

Reduce your energy use, and bills. ...

Respect and protect green spaces. ...

Invest your money responsibly. ...

Cut consumption – and waste.

hope it helps ....please mark brainliest

how does gel electrophoresis separate DNA? and how is genetic engineering used to treat genetic diseases??

Answers

Answer:

How does gel electrophoresis separate DNA?  :

The technique of gel electrophoresis is used to separate DNA fragments based on their size. DNA samples are placed into wells (indentations) at one end of a gel and pulled through using an electric current. Negatively charged DNA pieces gravitate toward the positive electrode.

How is genetic engineering used to treat genetic diseases? :

Gene therapy aims to rectify genetic abnormalities and thereby prevent or treat hereditary disorders by modifying genes. Genetic engineering tries to tweak genes to improve an organism's capabilities beyond what is normal.

Explanation: See above

Hope this helps you, friend.

The enzyme that reads the template strand and makes a complementary strand of dna is:.

Answers

Answer: DNA polymerase

In order to generate one glucose molecule, the calvin cycle has to turn how many times?.

Answers

Answer:

The calvin cycle has to turn 6 times in order to generate one glucose molecule

Explanation:

PLEASE!! HELP ME!! HURRY!! PLEASE!! I REALLY NEED HELP!! PLEASE!! HELP!!

What is some information about Photosynthesis?

Answers

Answer:

the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.

Explanation:

The plant leaves are green because that color is the part of sunlight reflected by a pigment in the leaves called chlorophyll.

Photosynthesis is the process in which green plants use sunlight to make their own food. Photosynthesis is necessary for life on Earth. Without it there would be no green plants, and without green plants there would be no animals.Photosynthesis requires sunlight, chlorophyll, water, and carbon dioxide gas. Chlorophyll is a substance in all green plants, especially in the leaves. Plants take in water from the soil and carbon dioxide from the air.Photosynthesis starts when chlorophyll absorbs energy from sunlight. Green plants use this light energy to change water and carbon dioxide into oxygen and nutrients called sugars. The plants use some of the sugars and store the rest. The oxygen is released into the air.Photosynthesis is very important because almost all living things depend on plants for food. Photosynthesis is also important because of the oxygen it produces. Humans and other animals need to breathe in oxygen to survive.Some living things other than plants also make their own food through photosynthesis. They include certain types of bacteria and algae.

Hope this helps!

How many single chromosomes are in a human zygote?.

Answers

Answer:

46 chromosomes

Answer me:

1. Identify the correct statement about the magma.
A. Typical magma temperatures exceed 10,000 degrees Celsius.
B. Magma always comes from the lower mantle.
C. Magma never contains dissolved gases.
D . Magma forms after magma melts

2. Very explosive volcanoes tend to have___________
A. Gases rich in sulfur dioxide
B. Low viscosity magma
C. gentle, sloping sides
D. High viscosity

3. Which of these statements is correct?
A. When a rock melts different minerals melt at the same temperature
B. If water is present, rocks will melt at a higher temperature.
C. Under high-pressure rocks melt at a lower temperature
D . Magma that crystallizes Form igneous rock.

4. It is the magma that is usually found at subduction zones.
A. Andesitic Magma
B. Basaltic Magma
C. Rhyolitic Magma
D. A & B

5. Which types of magma contain the least amount of SiO2?
A. basaltic
B. Candesitic
C. felsic
D. rhyolitic

6. What is molten rock that has formed deep within the Earth?
A. Hot Spot
B. Lava
C. Magma
D. Volcano

7. As the temperature of lava increases, it/s ________
A. begins to harden
B. viscosity decreases
C viscosity increases
D. sit can flow a much short distance

8. What makes magma different from lava?
A. color
B. composition
C .location
D . temperature

9. The composition of magma determines its _____.
A. color
B. darkness
C. viscosity
D. none of the above

10.Which one of these does NOT affect the temperature at which magma forms?
A. water
B. pressure
C.viscosity
D. Composition of material
_____________________
B. True Or False
1.. Lava with high silica content is less viscous to travel far and tends to break up as it flows.

2. Magmas with high silica content are more viscous than those with low silica content.

3.Lava with less silica content has a high viscosity that can travel a great distance, forming a thin sheet.

4. Lava with a low amount of gas as it rises has a low viscosity that it piles up at a vent resulting in a dome.

5.. Silica is a compound of silicon (SiO2)

6. The characteristic of magma that mainly determines its explosiveness is silica content.

7.A thick layer of volcanic ash can be heavy enough to collapse the roofs of buildings because ash consists of tiny fragments of rocks that become heavy as they pile up.

8. Lava with a low amount of gas and high silica content is very viscous and does not flow out at all

9. Lava with high temperature has high viscosity.

10. The viscosity of magma increases with temperature.​

Answers

Answer:

Typical magma temperatures exceed 10,000 degrees Celsius. Magma never contains dissolved gases. Magma forms when rocks melt. Magma always comes from the lower mantle.

An animal can wound a tree by scratching away the bark.. The tree can respond to the wounded many ways. Usually sapped quickly covers the wound, and then the tree covers the wound with new growth.




The diagram below shows a cross-section of the tree with a healed wound. What process works most directly with the transport system to heal the wound.
a. cellular reproduction
b. photosynthesis
c. water intake
d. carbohydrate system​

Answers

Answer:

the answer is A, cellular reproduction.

Explanation:

because cellular reproduction is a process by which cells duplicate their contents and then divide to yield multiple cells with similar, if not duplicate, contents, basically reforming itself again.

Which of these functions of life refers to
maintenance of an internal balance?

Answers

Answer:

Answer is homeostasis. I hope my May help you

When the color of the light changes, the number of light red kidney beans will also change Write a hypothesis about the effect of the red light on the population. Use the "if . . . then . . . because . . ." format, and be sure to answer the lesson question: "How does natural selection change the phenotypes within a population over time?"

Answers

Answer: If red light is shined on a population of red walking beans then they would not be as red as when started because they need light to survive and red light is present but they reflect it until they need it to survive.

Mutations that naturally occur can change phenotype and if it is beneficial to the species then it will be past on if it is no then it will die before passing it on.

Answer:

Explanation:

Natural Selection is defined as the evolutionary process in which organisms better suited to the environment tend to survive and reproduce.

If red light is shined on the population of red walking beans, then the population of light red kidney beans will increase because they will be camouflaged in the light and would not be able to see. The red light will make the beans invisible to other organisms and animals, which increase the population and survival rate of the beans.

To know more about this previous answer that has been tutor-verified, refer to the following link:

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How are molecules ,compounds and pure substances related

Answers

Answer:

They are all made of smaller substances, basically like the finishing products of building blocks.

I hope this helps!

What can a deficiency of growth hormone during bone formation cause?.

Answers

Growth hormone deficiency or (GH)

When the size of population increases and people own..... more goods there is an effect on​

Answers

There would be an effect on the economy, supply and demand for the goods, as well as the environment, depending on how the goods were manufactured.

Which type of mutation plays the most important role in increasing the number of genes in the gene pool?

Changes in nucleotide sequence that lead to natural selection removing the allele from the population
Point mutation with a change in one base resulting in a harmful phenotype
Rearrangement of gene loci due to deleting or disrupting chromosomes
Gene duplication allowing for mutations to accumulate and expand the genome over generations

Answers

Answer:

the answer is D i believe.

Explanation:

I believe so, dont take my word 100% on it though.

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