Answer:
The cell (from Latin cella, meaning "small room"[1]) is the basic structural, functional, and biological unit of all known organisms. Cells are the smallest units of life, and hence are often referred to as the "building blocks of life". The study of cells is called cell biology, cellular biology, or cytology.Cells consist of cytoplasm enclosed within a membrane, which contains many biomolecules such as proteins and nucleic acids.[2] Most plant and animal cells are only visible under a light microscope, with dimensions between 1 and 100 micrometres.[3] Electron microscopy gives a much higher resolution showing greatly detailed cell structure. Organisms can be classified as unicellular (consisting of a single cell such as bacteria) or multicellular (including plants and animals).[4] Most unicellular organisms are classed as microorganisms.
The number of cells in plants and animals varies from species to species; it has been estimated that humans contain somewhere around 40 trillion (4×1013) cells.[a][5] The human brain accounts for around 80 billion of these cells.[6]
Cells were discovered by Robert Hooke in 1665, who named them for their resemblance to cells inhabited by Christian monks in a monastery.[7][8] Cell theory, first developed in 1839 by Matthias Jakob Schleiden and Theodor Schwann, states that all organisms are composed of one or more cells, that cells are the fundamental unit of structure and function in all living organisms, and that all cells come from pre-existing cells.[9] Cells emerged on Earth at least 3.5 billion years ago.[10][11][12]
The diploid cells of a polar bear contain 74 chromosomes.
How many chromosomes are there
The genetic material that is passed from a parent to a child is called a chromosome. With a diploidy of 74 chromosomes, the haploid cell of the polar bear will have 37.
What is the difference between haploid and diploid cells?The number or ploidy of chromosomes in the somatic or germinal cells determines whether a cell is diploid or haploid. A twofold set of chromosomes is referred to as diploidy and is symbolized by the number 2n.
Haploidy, which is denoted by the number n, refers to the single or partial set of chromosomes found in germinal or reproductive cells. They describe the gametes that participate in fertilization.
If a polar bear's diploid cells (2n) have 74 chromosomes, its haploid cells (n) will have the following chromosome makeup:
2n = 74
n = 37
Therefore, option C is correct.
Learn more about cells, here:
https://brainly.com/question/29900772
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how much higher might sea level rise by 2100
NEED HELP ASAP BIOLOGY 20 POINTS
Answer:
It Is Number 3 My Grandmother Is A Doctor
Explanation:
Trust Me Its Number 3 She Has Been Working For 15 years btw
Is DNA replicated during Interphase II?
A. Yes
B. No
Glutamine is an _____
so is phenylalanine.
Answer:
Amino Acid
Explanation:
Glutamine and Phenylalanine are both Amino Acids
1. Which animal has the highest body temperature when the environmental temperature is 15 degrees Celsius?
A) Rabbit
B) Snake
C) Cat
D) Alligator
2. At 86 degrees Fahrenheit, what is the body temperature of the pigeon?
A) 30 degrees C
B) 40 degrees C
C) 41 degrees C
D) 47 degrees C
3. According to the graph, which ectotherm can live in the coldest environments?
A) Snake
B) Cat
C) Lizard
D) Rabbit
Answer:
1. C) Cat
2. D) 47 degrees C
3. B) Cat
BIOLOGY PLS HELP AND BE HONEST!!
If a large seed that was once prominent on an island became scarce and there were more small seeds available, how would this affect the relative fitness and what type of selection would this lead to?
a
Individuals at both the upper and lower ends of the curve will have higher fitness than individuals near the middle.
b
Individuals near the center of the curve will have higher fitness than individuals at either end.
c
Individuals at one end of the curve will have a higher fitness than individuals elsewhere in the curve.
d
The individuals in the curve would remain unchanged.
Answer:
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if the southern latitudes get more sun exposure for longer hours per day than Northern latitudes predict the effects on the animals living in the two locations
Answer:
Date and latitude interact to determine photoperiod, the daily period of daylight. This interaction has important implications for latitudinal migrants for whom daylight may be a resource or for whom photoperiod regulates annual transitions in life‐history stages (i.e. birds).
Using an established formula, we developed user‐interactive, animated models that enable the visualization of how latitude and date determine photoperiod for latitudinal migrants. We also calculated the photoperiodic schedules for a broad range of hypothetical migratory programmes and real migratory programmes newly available through the proliferation of citizen‐science data. This enabled us to infer the limitations some migratory programmes place on mechanisms for photoperiodic regulation of annual breeding.
In the vast majority of cases, the act of migrating elevates annual daylight exposure. This raises the hypothesis that daylight availability selects for latitudinal migration, potentially contributing to its evolution in animals such as diurnal birds with limited time during the spring and summer to feed young. However, photoperiodic mechanisms regulating annual cycles could constrain the evolution of such migrations, depending on how they affect photoperiodic schedules. Most migratory programmes are consistent with known mechanisms of avian photoperiodism, but the range of feasible mechanisms declines for transequatorial migrants, which experience semi‐annual, 180°‐phase‐shifts in their photoperiodic cycles.
Understanding photoperiodic constraints on migration are particularly important in this age of changing latitudinal distributions and phenologies driven by climate change.
Hope this helps and have a great day!!! :D
according to the nebular theory which planet is most likely to be a gaseous rather than Rocky
a. mercury
b.earth
c.Neptune
Answer:
i think its neptune
Manish is growing crop of Bengal gram and he did not add any nitrogen fertilizers to the soil. Would he get a better yield? How would the plants cope up with their nitrogen requirements?
Answer: Bengal gram is a leguminous plant.
Explanation:
Legumes are the plants that can fix nitrogen by symbiotic mutualistic association with the soil bacteria. The bacteria converts atmospheric nitrogen into plant usable for like ammonia and derives nutrition from the plant in return. This association results in the formation of root nodule for uptake of nitrogen derivatives from the soil and return of nutrients to bacteria. Bengal gram is a leguminous plant so it can avail nitrogen with symbiotic association with the bacteria in the soil. Although nitrogen is not given in the fertilizer but the gram crops can sustain themselves by obtaining nitrogen from the soil in association with nitrogen fixing bacteria.
A group of scientists studied the effects of exercise on insulin sensitivity in elderly women. The scientists measured the amount of insulin secreted in the saliva when given glucose. Measurements were taken at 0, 20, 40, and 70 minutes after the glucose was administered. The graph shows the data collected before and after a four-month exercise program was put into place
Which statement BEST analyzes the data shown in the graph?
A. Elderly women secrete more insulin the more they exercise.
B. Exercise decreases insulin sensitivity in elderly women.
C. Insulin sensitivity is at its highest after 50 minutes.
D. Insulin sensitivity increases as exercise decreases.
Which pollutant reduces the ability of the circulatory system to transport oxygen?
A)
particulate matter
B)
nitrogen oxide
C)
carbon monoxide
D)
sulfur dioxide
Answer:
C carbon monoxide
Explanation:
it combines with haemoglobin more faster than CO2 and O2 hence reduces O2 level in blood
please help!!!!!!!!!!!!
are these correct? or no?
Answer:
yes/no
Explanation:
1. looks correct!
2. i think that is the third choice because I learned that during interphase, the cell grows and makes a copy of its DNA. I learned this a while ago so I'm not 100% sure its correct. :)
Hypothermia _____. results from excess sun exposure causes a high, infectious fever results from high body temperature results from low body temperature
Answer: it comes from the results from low body temperature
Explanation:
She forms a hypothesis that the color reaches the flower through the stream.what should maria do to confirm the hypothesis
Who is my dad? Please help
thoughts about climate change ???
7 POINTS FOR EACH ANSWER and brainliest good at science? then step right up to this mind-boggling question!!
The power of imagination helps a scientist to
A. propose valid scientific explanations about the solar system
B. use biased methods to answer questions about the solar system
C. pose questions about the solar system which are not reasonable
D. create theories about the solar system which are not acceptable
Answer:
'A' is the answer. Imagination helped the scientists get their info. Without imagination, there would be no science.
Answer:
A
Explanation:
1Which waste needs to be sorted and which can be disposed of in the general bin? 2How do you know which wastes can be recycled and sorted? 3Provide arguments to show that we save energy by making items from recycled materials.
Answer:
Waste which needs to be sorted are: Plastic, paper, and alminium. And the ones can be disposed can be any other items such as food, sweet wrappers, plastic wrapping, and broken glass.
The waste bags are opened and the waste is put onto a conveyor belt and moved into a processing area. First, the waste will go into a pre-sort area, where any items that can't be recycled are removed, and then the materials move into an area where they can be sorted automatically by machines, or manually by workers.
As most people know, recycling can reduce pollution, animal harm, and energy because we won't need as much material to be making the same thing over and over again so in general, recycling is the best way to save energy and for the sake of the planets environment.
GOOD LUCK!!! I HOPE THIS HELPS!!!
Which of the following statements is correct? (choose one)
A.) All cells have the same genes, but different genes are active in different cells. All cells have the same genes, but different genes are active in different cells.
B.) All cells have the same genes, and all of a cell's genes are active at the same time.
Answer: I'm pretty sure B is correct.
Explanation:
yeah
PLEASE HELP ME!!!!!!!!!!!!!
Answer:
The first historical use of biomaterials dates to antiquity, when ancient Egyptians used sutures made from animal sinew. The modern field of biomaterials combines medicine, biology, physics, and chemistry, and more recent influences from tissue engineering and materials science.
Explanation:
For more info...visit
https://www.nibib.nih.gov/science-education/science-topics/biomaterials#:~:text=The%20first%20historical%20use%20of,tissue%20engineering%20and%20materials%20science.
what is respiration
Answer: the action of breathing.
Which measurement unit represents volume?
Answer:
Liter is a measurement unit that represents vume.
Which of the following distinguishes the outer limits of a standard growing season?
necessary GDD total
average upper temperature
first and last frost dates
locations by latitude and longitude
Answer:
frost dates
Explanation:
edge 2021
The weight of an object is measured by an equal arm balance. True False
Answer:
True
Explanation:
The weight of an object is measured by an equal arm balance. The mass of an object is measured by a scale. The mass of an object changes with elevation. The weight of an object will change with elevation on the Earth.
Which scenario describes the damage caused by a tornado? a flooded city on the coast with trees damaged by high winds a section of forest with trees that are burned or split in half a beach that has been severely damaged because of storm surge a path of destruction up to 50 miles long with destroyed trees and homes
Answer: a path of destruction up to 50 miles long with destroyed trees and homes (answer is d)
Explanation: 2021 edu.
d
The scenario that describes the damage caused by a tornado is a path of destruction up to 50 miles long with destroyed trees and homes.
WHAT IS TORNADO?A tornado refers to a violent windstorm characterized by a moving, twisting and funnel-shaped cloud.
A tornado can also be referred to as a violent storm that emanates from the earth to the atmosphere.
Tornado has devastating effects on the environment and this can include path of destruction up to 50 miles long with destroyed trees and homes.
Learn more about tornadoes at: https://brainly.com/question/1146984
In a food chain, consumers gather energy by _______. Can someone plz help
a.
consuming organisms at a lower trophic level
b.
consuming organisms at a higher trophic level
c.
decomposing dead organic matter
d.
absorbing sunlight directly
Answer:
a
Explanation:
l guess cos if u consider carnivores they feed on herbivores who are on a lower tropical level
Answer:
The correct answer is A Consuming organisms at a lower tropic level
Explanation:
Edg
I NEED THIS NOW!! No links
What does it mean when a substance sinks in water?
It is malleable.
It is not soluble.
Its density is less than water's density.
Its density is greater than water's density.
All animals share the following characteristic a. being a consumer, b having cell walls, c not having cell nuclei, d budding, Please include an explanation I just completed a test but I don't understand and when I looked for the question on brainly it had 2 answers disagreeing
Answer:
a. Being a consumer
Explanation:
All animals are comsumers because they do not have the ability to photosynthesise like plants do. In order for amimals to gain energy, they must consume plants or other animals.