Answer:
the release of cellular substances.
Explanation:
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What must happen before meiosis can begin?
A. Four gametes must be produced.
B. The four tetrads must be pulled apart.
C. DNA doubles and produces sister chromatids.
D. The cell membrane pinches together.
The process that must happen before meiosis can begin is that DNA doubles and produces sister chromatids (Option C).
What is meiosis?Meiosis is a cell division process that generates four daughter cells having half of the DNA when compared to the parental cell.
Meiosis needs first the duplication of the genetic material by means of a synthesis stage (S phase).
In conclusion, the process that must happen before meiosis can begin is that DNA doubles and produces sister chromatids (Option C).
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Archaea are often called _________ because they live in areas where most living things couldn't survive.
A. hydrophiles
B. extremophiles
C. heterotrophs
Answer:
B. extremophiles
Explanation:
Archaea are often called extremophiles because they live in areas where most living things couldn't survive.
Answer:
B. extremophiles
Explanation:
Archaea are called as extremophiles. So, option (B) is correct. Hope it helps you!!!
What rock and type of rock was found at the triangle shaped landform on Mars?
Answer:
heeya I'm jessyour answer is herethe triangle shape solid rock that form over time is called an alluvial fan.Explanation:
hope it may help you oopa/cissy whatever hahahaThe diagram below indicates the nucleus of an animal cell. nucleus Image courtesy of NIGUSNIH How does the nucleus of the cell contribute to the overall function of the cell? A. The nucleus changes sunlight to cellular food. B. The nucleus makes energy for the cell. C. The nucleus provides structural support for the cell. D. The nucleus regulates all cellular activity.
Answer:
D. The nucleus regulates all cellular activity
Answer: D. The nucleus regulates all cellular activity
When new molecules are introduced to one isolated area of a solution, there will temporarily be a high concentration of those molecules in one area of the solution. What is the name for the spontaneous process of dispersing these molecules to create a uniform concentration throughout the solution?
1. osmosis
2. transport
3. filtration
4. diffusion
Answer:
4.Diffusion
Explanation:
Diffusion if the movement of particles from a region of high concentration (where there is many) to a region of low concentration (where there is less) until it is evenly distributed.
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Which of the following features exposed during glacial periods but covered by ocean water during non-glacial periods?
Answer:
Continental shelf
Explanation:
I checked in lesson also took the exam.
continental shelf exposed during glacial periods but covered by ocean water during non-glacial periods.
What is a continental shelf?The undersea boundary of a continent is known as a continental shelf. The seven major divisions of land on Earth are called continents. From a continent's shoreline to a point known as the shelf break, a continental shelf runs.
Due to its relative accessibility, the continental shelf is the area of the ocean floor that is most understood. The continental shelf is where the majority of commercial sea resource extraction occurs, including the extraction of hydrocarbons, non-metallic ore, and metallic ore.
Thus, the continental shelf is exposed during glacial periods but covered by ocean water during non-glacial periods.
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It is projected that an increase in carbon dioxide levels in the atmosphere will MOST LIKELY lead to _____.
Select one:
a. lower-than-average hurricane rates
b. higher-than-average ice levels in arctic
c. higher-than-average sea levels
d. lower-than-average ocean temperatures
Unlike other cell parts, mitochondria can accumulate mutations with every cell division. Why? A. Mitochondria exist outside of the cell's nucleus b. Mitochondria are susceptible to toxins c. Mitochondria have their own DNA d. Mitochondria are fragile
Answer:
c. Mitochondria have their own DNA
Explanation:
Shawna is writing a paper for her science class, and she wants to include a list of luminous objects. These are objects that produce and emit
their own light. Objects that are not luminous, also called illuminated objects, only reflect light.
Which list should Shawna add to her paper?
Answer:
The sun, the star Proxima Centauri, and the star Polaris.
Explanation:
The sun and stars emit light on their own, therefore they are luminous.
5
Select all the correct answers.
Which situations describe an elastic collision?
Two glass marbles bounce off each other.
Rodrick flops onto his sofa and sinks into the cushion.
ОООО
A tossed water balloon flattens when it lands on the grass.
A bowling ball knocks over five pins.
Reset
Next
Droughts occur due to climate change and elevated temperatures, which in turn may lead to other consequences as well. Imagine that a wildfire happened in the nature reserve. Predict what would happen if such an environmental shift that is so extreme and rapid
Hits the nature reserve and the population of deer mice does not have time to adapt. Propose a possible solution for this problem.
Answer:
this is not a correct Q
this is wrong
When blood glucose concentration rises, the pancreas secretes _______, and when blood glucose levels fall the pancreas secretes _______.
Explanation:
when glucose concentration is high the pancreas secretes more insulin while if the glucose level falls the pancreas secretes glucagon to raise them
Explain how this mutation will result in competition within the population that is linked to the idea of survival of the fittest.
Answer:
Survival of the fittest, term made famous in the fifth edition (published in 1869) of On the Origin of Species by British naturalist Charles Darwin, which suggested that organisms best adjusted to their environment are the most successful in surviving and reproducing. Darwin borrowed the term from English sociologist and philosopher Herbert Spencer, who first used it in his 1864 book Principles of Biology. (Spencer came up with the phrase only after reading Darwin’s work.)
Herbert Spencer's Principles of Biology (1864) first introduced the expression “survival of the fittest.”
Survival of the fittestQUICK FACTSKEY PEOPLEAlfred Russel WallaceHerbert SpencerRELATED TOPICSAdaptationNatural selectionDarwinian fitnessUse in evolutionary theoryDarwin did not consider the process of evolution as the survival of the fittest; he regarded it as survival of the fitter, because the “struggle for existence” (a term he took from English economist and demographer Thomas Malthus) is relative and thus not absolute. Instead, the winners with respect to species within ecosystems could become losers with a change of circumstances. For example, fossil evidence supports the notion that the mammoth (Mammuthus) was more fit during the most recent ice age (which ended roughly 11,700 years ago), but it became less fit as humans hunted it and the world’s climate warmed; fossil evidence suggests that the mammoth succumbed to extinction a few thousand years later.
Darwin’s theory of evolution by natural selection entailed three crucial elements: variation, reproduction, and heritability. Variations in the physical features of organisms that tend to benefit an individual (or a species) in the struggle for existence are preserved and passed on (or selected), because the individuals (or species) that have them tend to survive. The success or failure of a given variation is not known when it emerges; it is known only retrospectively, after organisms that possess it either grow and mature and pass it to their own offspring or fail to mature and reproduce.
Importantly, Darwin was influenced by the thinking of English physicist and mathematician Isaac Newton, whose system emphasized experimentation, mathematics, and logic over subjective sense experience. During Darwin’s time, his evolutionary theory was an attempt to construct a similar system for the living world, a frontier not yet crossed in the biological sciences.
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Some philosophers and scientists have suggested that the notion of survival of the fittest is an example of circular reasoning—that is, a tautology (a statement framed in such a way that it cannot be falsified without inconsistency). In tautologies, any true statements that follow are a matter of definition. Indeed, describing those that survive as the fittest is similar to stating that those that survive survive. British philosopher Karl Popper considered “survival of the fittest” self-evident at first; however, he changed his mind after realizing that Darwin posited variation axiomatically; that is, Darwin noted that all individuals did not start with the same set of characters (or traits). Therefore, the forces affecting survival did not weigh on individuals and species equally; there were always variations, some of which would prove favourable and confer fitness over others.
Explanation:
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Explain how different types of cells help organisms live and grow?
Different types of cells have different jobs that are necessary to keep organisms alive.
Different types of cells are only found in specific types of organisms.
Cells are necessary in order for all organisms to grow big and hunt for their food source.
Cells provide support for all organisms to be able to move.
Answer:
Different types of cells have different jobs that are necessary to keep organisms alive. And cells also give the living animal more support. They also hold the genetic information of that organism in their nucules. This is with most cells but bacteria cells do not contain nucules.
a) ¿Qué son las enzimas y por qué se las denomina catalizadores biológicos?
Answer:
las enzimas son proteínas y aceleran reacciones químicas.
all prokaryotes are single-celled organisms. compare prokaryotes and eukaryotes. select the characteristics that only apply to prokaryotes.
•these cells contain membrane bound organelles.
•these cells have DNA contained in nucleus.
•these cells have DNA in a region called the nucleoid.
•some of these cells have structure like flagella and microvilli.
•these cells have cell walls made of polypeptides and polysaccharides.
•these cells have cell walls made of cellulose.
These cells have DNA in a region called the nucleoid.
-Some of these cells have structures like flagella and microvilli.
-These cells have cell walls made of polypeptides and polysaccharides.
Answer:
These cells have DNA in a region called the nucleoid.
-Some of these cells have structures like flagella and microvilli.
-These cells have cell walls made of polypeptides and polysaccharides.
Explanation:
Describe the size of insolation when it strikes the Earth.
Answer:
the surface of the earth absorbs. 51 percent of the insolation
What is a pioneer species? (Will give brainiest)
Answer:
The first species to colonize an ecosystem that is previously damaged or disrupted. Supplement. Pioneer species is the first to colonize an ecosystem previously disturbed or damaged. For example, sand that has become barren is colonized by a pioneer species of lyme grass (Leymus arenarius)
Explanation:
an air mass with low pressure will flow?
A. towards the West
B. flow in a circular pattern
C. to regions with low pressure
D. to regions with high pressure
Answer:
C. to regions with low pressure
Explanation:
hope it is helpful to you
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Anthropologists have concluded that modern day humans originated from the continent of Africa. Looking at the distribution of skin tones we now see all over the world today explain why this pattern is makes sense for what we see today.
MUST USE AND HIGHLIGHT THE FOLLOWING KEY TERMS: variation, direct sunlight, UV radiation, Vitamin D, folate (folic acid), equator, evolution, parents, offspring, Africa, survival, natural selection, genes, latitude, adapt/adaptation
Answer:This pattren makes sense for what we see evryday is beacause each skin color come from somewhere like the skin color white it moslty comes from english speaking countries.
Explanation:Hope it helped
a square and a triangle can be intersect in
DNA is a
A. lipid
B. nucleic acid
C. carbohydrate
D. protein
Answer:
B
Explanation:
Answer:
B. nucleic acid
Explanation:
DNA is a type of Nucleic acid.
1. The diagram below represents structures found in a human female,
3 to the document will
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Which process results in the formation of structure X?
A) mitosis
B) meiosis
C) recombination
D) cloning
The process that leads to the formation of structure X in the diagram would be meiosis.
The diagram is that of the female's reproductive structure showing the uterus, ovary, and fallopian tubes.
The structure marked X is an ovum or egg.The ovary produces ovum or eggs through a division known as meiosis.The ovary is diploid (2n), but gives rise to haploid (n) eggs by meiotic division. Thus, meiosis is referred to as reductional division.
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what is the role of the controlling tube
If the activation energy required for a chemical reaction were reduced, what would happen to the rate of the reaction?
O The rate would increase.
The rate would decrease.
O The rate would remain the same.
O The rate would be zero
The cell membrane controls what enters and leaves the cell. Which of the
structures in the diagram below is the cell membrane?
E
F
B
Ο Α.Ε
OB. A
Ос. В
ODC
C shows the structure of the cell membrane
Which of the following is a subsystem of an organism?
a.cell
b.organ system
c.tissue
d.all of the above
Answer:
d
Explanation:
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What are the characteristic of a cell?
Answer:
All cells have a cell membrane, cytoplasm, and DNA. cells differ in how their genetic information is contained. All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing. When viewed together, these characteristics serve to define life.
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Explanation: