Answer:
Microscope
Explanation:
A microscope is an instrument that can be used to observe small objects, such as cells. The image of an object is magnified through at least one lens in the microscope.
Question
What is the device used to observe cells?
Answer
MicroscopesWhat is Microscopes?
Microscope is an instrumet or device that can be used to observe small object , even cells or smal organisms.#LearnwithBrainly
Which statement best describes Earth's human carrying capacity?
A: It is a fixed number that we will soon exceed.
B: It is increasing due to improved technology and medicine.
C: It is decreasing due to increasing population.
D: It is decreasing due to decreasing death rates.
The statement that best describes Earth's human carrying capacity that it is increasing due to improved technology and medicine. The correct option is B.
What is carrying capacity?Carrying capacity is the amount of persons the individual may experience over a lengthy amount of time and density affects the overall population.
Food, habitat, moisture as well as other necessities found in the environment determine carrying capacity.
Carrying capacity is defined as the average population size of a species in a given habitat.
Environmental factors such as adequate food, shelter, water, and mates limit the species population size. If these needs are not met, the population will decrease until the resource rebounds.
The best description of Earth's human carrying capacity is that it is increasing as a result of improved technology and medicine.
Carrying capacity is defined as the maximum number of individuals of a population that the environment can support.
Thus, the correct option is B.
For more details regarding carrying capacity, visit:
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What causes the formation of a cervical plug a testorone b progesterone c luteal d estroge e follicle
Answer:
b progesterone
Explanation:
The plug is formed as soon as there is implantation of fertilized eggs. The thickness of the cervical mucus becomes different as hormone levels changes in pregnancy.
The progesterone, encourages the production of thick fluid/ mucus which brings about the formation of a plug. This prevents bacteria from getting into the uterine cavity.
Answer: The correct option is B (progesterone).
Explanation:
The cervix is the ring of muscles also called the neck of the uterus in female reproductive system. This protrudes through the anterior wall of the vagina, opening into it at the external os.
After the fertilization of the ovum by the spermatozoa, the uterus prepares for the implantation which results from the secretion of hormones. Under the influence of oetrogen, secreted by the developing follicle, the cells of the endometrium divide rapidly causing the endometrium to build up and thicken.
While the viscosity of cervical mucus changes in response to hormone levels and during pregnancy, progesterone fosters the production of highly viscous mucus resulting in the formation of a plug that forms a physical barrier to bacteria and prevents their ascension into the uterine cavity. This plug is called CERVICAL PLUG.
Mitosis makes.....
A. cell phones
B. identical body cells
C. sperm and egg cells
B. identical body cells
hope it is helpful to you
Answer:
B. identical body cells
Explanation:
Mitosis produces new cells, and replaces cells that are old, lost or damaged. In mitosis a cell divides to form two identical daughter cells. ... Mitosis separates these chromatids, so that each new cell has a copy of every chromosome.
Which of the following processes transfers carbon directly from sea water to sea plants
the unaided eye perceive stars of the _______ magnitude
Answer:
sixth
Explanation:
yeah that's the answer but It said to explain so I'm jus telling u
Dados los elementos Ca y Cl
a) Escribir la CE (Configuración electrónica)
b) ¿Cuál de estos átomos tiende a perder electrones y cuál a ganarlos? ¿Cuál formará aniones y cual cationes?
c) Escribir la estructura de Lewis para la sustancia iónica cloruro de calcio (CaCl2).
Answer: The answer is c
Which of the following are the main components of an mRNA vaccine?
mRNA and B-Cells that recognize the coronavirus
mRNA and antibodies that can inactivate the coronavirus
mRNA and spike proteins from the coronavirus
mRNA only
5. Our nervous system and our skeletomuscular system help us react to stimuli. Give one example on how this helps us maintain homeostasis.
Answer
The nervous and skeletomuscular systems help maintain homostasis by regulating respiration.
Explanation:
The brain stem, consisting of the pons and medulla, represent the main respiratory center. According to Wikipedia, "an increased level of carbon dioxide in the blood, or a decreased level of oxygen, will result in a deeper breathing pattern and increased respiratory rate to bring the blood gases back to equilibrium."
This is an example of a homostastic response controlled by both of the organ systems referenced above.
Source: https://en.wikipedia.org/wiki/Homeostasis
How does bacteria cause disease?
Answer:
Bacteria cause disease by secreting or excreting toxins (as in botulism), by producing toxins internally, which are released when the bacteria disintegrate (as in typhoid), or by inducing sensitivity to their antigenic properties (as in tuberculosis).
btw :
stay safe! :3
How does polyploidy allow speciation to occur in a single generation? Polyploid offspring produce gametes earlier in the mating season than than their diploid parents, causing reproductive isolation between the two generations. Polyploid offspring produce smaller gametes that disperse farther than the gametes of diploid parents, causing geographic isolation between the two generations. Physiological differences between polyploid offspring and their diploid parents allow them to thrive in different environments, causing geographic isolation between the two generations. Genomic differences between polyploid offspring and their diploid parents prevent them from successfully interbreeding, causing reproductive isolation between the two generations.
Answer:
Genomic differences between polyploid offspring and their diploid parents prevent them from successfully interbreeding, causing reproductive isolation between the two generations.
Explanation:
Speciation is an ecological and biological process through which new species are formed due to isolation.
In plants, polypoidy involves the possession of two complete sets of chromosomes and it leads to the origin of new species. Also, the two sets of chromosomes comprises of triploidy (69 chromosomes) and tetraploidy (92 chromosomes).
As a result of the genomic differences between polyploid offspring and their diploid parents, this usually prevent them from successfully interbreeding and consequently causing reproductive isolation between the two generations.
PLEASE HELP! WILL MARK BRANLIEST!
The amount of carbon today is the exact amount that has always been on Earth. T or F
Explain the advantage of an increase in the number of mitochondria in slow twitch fibres. Include at least 2 points in your response
Answer:
To produce more ATP molecules.
Explanation:
The advantage of an increase in the number of mitochondria in slow twitch fibers is to provide more ATP is provided to the muscles. These large number of mitochondria is responsible for the production of large amount of ATP which is a fuel that is used by the muscles of the boy in order to continue working. There is high burden on the slow twitch fibres in order to continue its movement, more mitochondria is needed.
A scientist is studying a cell from an unidentified organism. Which of these observations of the cell provide evidence for classifying the cell as PROKARYOTIC and NOT EUKARYOTIC? Select all that apply
The cell has a cell wall.
The cell lacks mitochondria, chloroplasts, and other membrane-bound organelles.
The cell has a cell membrane.
The cell has ribosomes in its cytoplasm.
The cell lacks a nucleus.
Answer:
hfdjjjjjjhgjluhb
Explanation:
For every action or force
in nature, there is an equal
and opposite reaction.
Answer:
Newton's Third Law of Motion
Explanation:
Newton's third law of motion states that any object that has a force applied to will react in the opposite direction
Hope It Helps you!!
Indicate whether the statement is true or false.
This is Ag work please answer correctly
____ 1. Plants are used directly and indirectly to meet human needs
____ 2. A steer is a female cow that has given birth
____ 3. You have to live on a farm to be an FFA member
____ 4. We believe are the first two words of the FFA creed
____ 5. Thank you notes are required to get a job
____ 6. Only female turkeys gobble
____ 7. A first year FFA member is called a Greenman
____ 8. To be in FFA you have to be in an Agriculture class
____ 9. It is okay to let a non FFA member wear your FFA jacket
____ 10. You have to be in FFA to have an animal project
____ 11. It is okay to leave blanks on a job application
____ 12. A male turkey is called a Tom
____ 13. While in FFA official dress it is acceptable for makes to wear khaki pants
____ 14. A cow is a ruminant animal
____ 15. Cows have only one stomach compartment
____ 16. Turkeys grow to full maturity in about 4 to 5 months
____ 17. The FFA is only in the state of Texas
____ 18. The FFA emblem plow stands for labor and tillage of the soil
____ 19. There are 3 paragraphs in the FFA creed
____ 20. A turkey under sixteen weeks of age is called a roaster
____ 21. Wild turkeys are white in color
____ 22. Freeze branding is the only way to identify cattle
____ 23. A job application is one of the first barriers that you encounter before you are employed
____ 24. The gestation period of cattle is only 3 months
____ 25. Domesticated turkeys cannot fly
____ 26. A T-bone steak is considered a by- product
____ 27. The official colors of the National FFA are blue and gold
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____ 28. Which act established vocational agriculture courses in 1917?
____ 29. What did FFA stand for before it was changed?
____ 30. The official colors of the FFA are
____ 31. How should the FFA jacket be worn?
____ 32. List the parts of the FFA emblem
____ 33. Plants impact what environmental factors?
____ 34. When measuring a horse 1 hand= _____ inches
____ 35. Who wrote the FFA creed?
____ 36. What provides the foundation of the FFA emblem?
____ 37. The FFA emblem has how many symbols?
____ 38. The highest FFA degree members can earn is…
____ 39. The first line of the FFA motto is
____ 40. List the official Dress for females
____ 41. What are the last few words of the first paragraph of the FFA creed
____ 42. In ___________ the FFA opened membership to girls
____ 43. ______ believe in less dependence on ________ and more power in bargaining
____ 44. The Symbol on the FFA Emblem that signifies Labor and tillage of the soil is
____ 45. What does polled mean?
____ 46. breeds of cattle are known for milk production
____ 47. What do you call a neutered male cow?
____ 48. What do you call a male sheep or goat that has been castrated when its young?
____49. Swine breed most used for pets
____ 50. The most popular goat breed used for FFA projects
Answer:
1True
Explanation:
Because plants and animals are in various relation. example Food air and e.c.t.
Which three statements are true about the energy flow in an ecosystem?
Answer:
main source of energy for an ecosystem is the sun producers convert radiant energy to chemical energy the maximum amount of biomass is at the lowest trophic level
Answer:
A,B and E
Explanation: hope it helps you :)
Which of the following characteristics of life apply to bacteria?
A)They evolve
B)They reproduce
C)They use energy
D)All of the above
Answer:
All of them above
hope it helps
Answer:
It should be D
All of the above
assume that cody used a weak magnet and the flake of cereal was not attracted to it what conclusion might he have drawn?
Answer: he might have concluded that the flake of cereal was not magnetic
Explanation:
Would you predict more earthquakes in areas where tectonic plates are colliding or where they are moving apart?
PLSS HELPP MEEE
Answer:
Maybe where they are colliding because when they collide there is going to be a wave of impact that will go to the surface
Explanation:
Can someone help me?
Answer:
1. lytic/losigenic cycle
2. Restriction enzymes (breaks) and DNA ligase (joins)
3.mitosis (creation of twin daughter cells)
4. mitosis had helped humans with cell growth and repais (and keeps a steady supply of new cells)
Explanation:
it first goes through the lytic cycle where one bacterium inserts it's own dna into a host (human cell) and into the human DNA and it starts multiplying inside human cells in the lysogenic cycle
The tube in the penis where sperm exits is
Answer:
The vas deferens transports mature sperm to the urethra in preparation for ejaculation.
Answer: testes
Explanation:
Sperms are made in testes.
What is the most significant challenge for organisms that live in estuaries?
O A. Changing nutrient levels
O B. Changing water temperatures
O C. Changing water depth
O D. Changing water salinity
SUBMIT
(FOR TEST HELPPPP N HURRYYYY PLEASE!!!)
Answer:
D
Explanation:
sorry replied late buh it's better to know for the future l guess
What is respiration and the types of respiration
Answer:
Hey mate......
Explanation:
This is ur answer.....
Respiration is the process by taking in oxygen and liberating carbon dioxide from the oxidation of complex organic substances.
Three types of respiration include internal, external, and cellular respiration. External respiration is the breathing process. It involves inhalation and exhalation of gases. Internal respiration involves gas exchange between the blood and body cells....
Hope it helps!
Brainliest pls!
Follow me! :)
Because the imaginary axis of the earth is inclined to the sun at the equator, the northern and southern hemispheres shine in different ways. When it is summer in the northern hemisphere of our planet, then it is winter in the southern hemisphere
Answer:
Yes.
Explanation:
Yes, when it is summer in the northern hemisphere of earth, then it is winter in the southern hemisphere. This change of season occur due to tilting of earth. The season of northern hemisphere and southern hemisphere are different and opposite to each other because both are present at opposite location on the earth surface. The tilting region experience winter season whereas the other regions experience summer due to direct sunlight.
Anthropologist: In an experiment, two groups of undergraduates were taught how to create one of the types of stone tools that the Neanderthals made in prehistoric times. One group was taught using both demonstrations and elaborate verbal explanations, whereas the other group learned by silent example alone. The two groups showed a significant difference neither in the speed with which they acquired the toolmaking skills nor in the level of proficiency they reached. This shows that Neanderthals could just as well have created their sophisticated tools even if they had no language
Which one of the following, if true, most weakens the anthropologist's argument?
(A) Apart from the sophistication of their stone tools, there is a great deal of evidence suggesting that Neanderthals possessed some form of language.
(B) The students who were taught with verbal explanations were allowed to discuss the toolmaking techniques among themselves, whereas the students who learned by silent example were not.
(C) The tools that the undergraduates were taught to make were much simpler and easier to make than most types of tools created by Neanderthals.
(D) The instructor who taught the group of students who learned by silent example alone was much less proficient at making the stone tools than was the instructor who taught the other group of students.
(E) The tools created by Neanderthals were much less sophisticated than the tools created by anatomically modem humans who almost certainly possessed language and lived at the same time as the Neanderthals.
Answer:
A
Explanation:
The point of this arguement is that with or without speaking they were able to make the same sophisticated and complex tools, if it is true that both had a language that would mean the silent people would have no point and that both types of humans had the same initial factors.
In which ocean's zone would you expect to see the
ecosystem shown?
the open ocean
the intertidal zone
the benthic zone
the neritic zone
zone?
Answer:
La zona intermareal
Explanation:
Por que en la información del texto
Answer:
Intertidal zone
Explanation:
I took the assigment :)
As native mason bees visit flowers, they spread pollen while also consuming nectar from the plant. This is an example of symbiosis.
true or fasle
Answer:
True
Explanation:
Symbiosis is a type of relationship or interaction between two different biological organisms/species by which both are benefited. The bees such as mason bees are pollinators. Pollinators are animals (especially insects) that help the development of seeds and the fruit surrounding seeds by the pollination of flowers, i.e., by the transference of pollen from male anthers of a flower to the female stigma. During this process, pollinators eat nectar, which is a sweet energy-rich liquid secreted by flowers. In consequence, both species (i.e., plants and mason bees) are benefited from this interaction.
Genetically modified organisms include microbes used in biotechnology that possess enzymes promoting antibiotic resistance. This could be a problem given the rise of antibiotic-resistant organisms. However, these engineered microorganisms do not pose a risk to public health. What do you think prevents them from spreading antibiotic resistance to pathogens outside the laboratory
Answer:
What prevents these microorganisms from spreading resistance outside the laboratory is that they are modified to not survive outside the laboratory environment.
Explanation:
Antibiotic resistant microorganisms are very dangerous and unfavorable, as they leave living beings completely completely defenseless to their attacks. However, there are microorganisms that have been modified in the laboratory, as shown in the question above, and do not present any risk to living beings, even if they develop resistance. This is because the modification that these microorganisms received makes them not survive the environmental conditions outside the laboratory, which causes them to die if they leave the laboratory.
The energy required to get a reaction started is called activation energy.
]
True
False
Answer:true
Explanation:
What does stage 4 show?
A. A young female cone with fertilized eggs matures into a seed
cone.
B. A spore divides and grows into a pollen grain using mitosis.
C. Young male cones produce spores using meiosis.
D. A seed that contains an embryo plant grows into a young pine
tree.
Answer:
A.
Explanation:
It looks like the pine cone looks like is turning into a normal cone. That is why.
Answer: A. it looks as if its matured from being a young cone
