Answer:
Haploid number of chromosomes.
Explanation:
Before fusion of sex cells i. e. sperm cells and egg cells, there are half number of chromosome present in each sec cell because in the sex cells meiosis occurs. Meiosis is a type of cell division in which a single parent cell divides into four daughter cells having haploid chromosome i. e. half number of chromosomes in each daughter cell. So when these sex cells fuse together, they form a diploid organism.
In the past several years we have seen increased numbers of forest fires occurring in our tropical rainforests. While natural burns are usually beneficial and a typical occurrence in forests, tropical rainforests do not typically undergo this natural process due to the average yearly amount of rainfall. This causes habitat loss and ecosystem disruption for the rainforest.
The increased occurrence of tropical rainforest fires is most likely caused by..
Select one:
Decreased tourism and human visitors to the area.
Increased precipitation rates in the southern hemisphere
Decreased production of oxygen, which helps fuel natural fires.
Increased global temperatures, leading to a 20% reduction in rainfall
Answer:
Increased global temperatures, leading to a 20% reduction in rainfall
Explanation:
According to this question, forest fires are becoming rampant in tropical rainforests. Although this occurrence is natural, tropical rainforests do not typically undergo this natural process due to the average yearly amount of rainfall. This means that the high amount of rainfall in tropical rainforests help prevent or reduce the high cases of forest fire incidence.
However, the recent increased occurrence of tropical rainforest fires is most likely attributed to an INCREASE IN GLOBAL TEMPERATURES, LEADING TO A 20% REDUCTION IN RAINFALL. This is because an increase in the global atmospheric temperature causes the reduction of the amount of rainfall, which naturally helps curb the occurrence of forest fires.
Which of these processes does not require the cell to use energy?
A. Cell division
B. Protein synthesis
C. DNA replication
D. Diffusion across a membrane
Answer: Diffusion across a membrane!
Explanation:
Water can easily go through the semi-permeable membrane by osmosis!
Which planet is terrestrial?
O Jupiter
0 Mars
OSaturn
OUranus
Answer:
mars
Explanation:
The Terrestrial Planets are Mercury, Venus, Earth and Mars
What is the difference between control group and controlled variables of an experiment
PLEASE ANSWER!!!!! For each sentence below, select the name of the specialize cells being described.
neurons are specialized cells that generate and conduct electrical impulses throughout the body.
Answer:
1. Neurons
2. White blood cells
3. Epithelial cells
4. Red blood cells
5. Muscle cells
Explanation:
How does endosymbiosis work
Answer:
The endosymbiotic theory states that some of the organelles in today's eukaryotic cells were once prokaryotic microbes. They eventually lost their cell wall and much of their DNA because they were not of benefit within the host cell. Mitochondria and chloroplasts cannot grow outside their host cell.
Explanation:
I hope this helped!
Facilitated diffusion is an example of what kind of cellular transport?
A. Passive transport
B. Endocytosis
C. Active transport
D. Osmosis
Answer: A
Explanation:
Is passive, because it passive but need a little bit of help passing through and don't require energy.
Hope the best
Facilitated diffusion is an example of passive transport. Therefore, the correct statement is option A.
What is Facilitated diffusion?Facilitated diffusion is a type of passive transport where molecules move across the cell membrane from an area of higher concentration to an area of lower concentration. The movement of these molecules required the presence of transport proteins, which act as channels or carriers for the molecules.
Active transport requires energy for the movement of molecules against the concentration gradient. However, facilitated diffusion does not require any energy for the movement of molecules and depends on the natural movement of molecules down their concentration gradient.
Facilitated diffusion also allows cells to selectively transport molecules across their membranes, such as glucose being transported into cells by facilitated diffusion using transport proteins.
Therefore, facilitated diffusion is a type of passive transport as it does not require any energy for the movement of molecules in and out of the cell.
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Whích phase of meiosis includes homologous
chromosomes pairing up and forming tetrads?
Answer:
Prophase I of meiosis
Explanation:
A tetrad is the group of two homologous chromosomes that have each already replicated into a pair of sister chromatids, forming a foursome. This replication happens during interphase.
During prophase I of meiosis, homologous chromosomes pair up and form tetrads. This is prior to crossing over, which is the exchange of genetic material that happens between homologous chromosomes prior to the formation of gametes.
Cell Structure of the outer container of the cell
You can follow the flow of energy in an ecosystem by following its food or .
In your own words: What is the study of ecology?
Answer:
Ecology is the study of organisms and how they interact with the environment around them. ... Changes in ecosystems can result from many different factors including diseases among the organisms living in the area, increases in temperature, and increased human activities.
Explanation:
Which following is similar between RNA and DNA?
A) type of sugar
B) type of purine base
C) number of strands
D) type of pyrimide base.
Answer:
The correct answer would be A, type of sugar.
Explanation:
I hope this helps you! :)
Which RNA base bonds with guanine?
Answer:
Cytosine
Explanation:
DNA:
Adenine - Thymine
Cytosine - Guanine
RNA:
Adenine - Uracil
Cytosine - Guanine
Shelly wants to know if the temperature of a tennis ball affects the height it will bounce. What is the independent variable?
A. The tennis court
B. The temperature of the tennis ball
C. How high it bounces
D. The brand of a tennis ball
Humans, animals and plants depend on the cycle of cellular respiration and photosynthesis for survival. true or false
Answer:
Humans, animals and plants depend on the cycle of cellular respiration and photosynthesis for survival. ... The process of photosynthesis is used by plants and other photosynthetic organisms to produce energy, whereas the process of cellular respiration breaks down the energy for use.
Explanation:
Hii!!! i was wondering if anyone could help me answer this question:
Explain how sugar molecules could be used to make other organic compounds.
Answer:
Sugar molecules contain carbon, hydrogen, and oxygen: Their hydrocarbon backbones are used to make amino acids and other carbon-based molecules that can be assembled into larger molecules (such as proteins or DNA), used for example to form new cells.
Explanation:
Stores material within the cell
Answer:
vacuole
Explanation:
When DNA is not condensed into
chromosomes, which of the following
houses and stores DNA inside the nucleus?
A. histone
B. chromatin
C. mitochondria
List 4 examples of bacteria
Draw circle and label the diagram below using the following words (polymer, monomer)
PLEASE HELP MEEE
Answer:
The diagram given is showing polymer and monomer.
The diagram on the left side of the arrow shows a polymer as it is large and consists of repeating chains of two molecules while the diagram on the right side shows a monomer, which is a single unit of a molecule that combines together to form polymers.
In the given diagram, the polymer, in which its monomer unit bound with water molecules is breaking into monomers.
Hence, the left side diagram shows a polymer, and the right side diagram shows monomer.
In the given picture, polymer is present in the left side while on the right side monomers are present.
Polymer:
These are the macromolecules that are made up of repeated units of monomers.
For Example: Polysaccharides
Polysaccharides are made up of repeated units of sugars such as glucose. They give monomers on hydrolysis.In the given Picture,
A polymer is hydrolyzed to form monomers.
Therefore, In the left side polymer is present while on the right side monomers are present.
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A lab group in biology class wanted to model cell transport using wedges of tubers, an underground stem. The students massed the tuber slices, placed them into various sucrose solutions, and then let them soak overnight. The masses of the tuber slices were taken the next day. The data is shown here. What statement is best supported by the data from this experiment?
Answer:
Answer on usatestprep is D
Explanation:
Stavanger, Norway has a warmer climate than the rest of Norway . What would cause this?
a.stavanger is the southernmost city .
b. the gulf stream carries warm water to the stavanger area .
c.the artic current carries cold water toward norway
d.there is no sea ice in the region to create the cold , deep ocean currents
Answer:
Stavanger is warmer than the rest of Norway because the Gulf Stream carries warm water to the Stavanger area.
Explanation:
A is not correct because there are cities in Norway that are located further south than Stavanger.
B is correct because the location of Stavanger is right where the Gulf Stream influences the Norwegian coastline the most, bringing in warm water, thus warmer weather conditions as well.
C is not correct because if that was the case Stavanger would have been significantly colder.
D is not correct because the lack of sea ice is due to the Gulf Stream.
How are interphase and mitosis different from one another?
the interphase is the stage in which the cell duplicates its content. Mitosis is the stage in which the cell divides into two new cells.
What is the interphase?The interphase is the stage before cell division occurs. During the interphase, the cell prepares to divide into two new daughter cells (mitosis).
The interphase is composed of three phases,
The G1 stage ⇒ the cell duplicates in size. The organelles and other cytoplasmatic structures duplicate. The S stage ⇒ occurs the DNI replication process, the synthesis of histones and other associated proteins.The G2 stage ⇒ begins the slow process of DNI condensation. Duplication of centrioles completes. Structures such as spindle fibers are assembled.What is mitosis?Mitosis is a process by which, from a diploid somatic cell (2n), two daughter diploid cells (2n) are produced.
Mitosis occurs in only one phase,
In the prophase, it occurs chromosomes condensation and nuclear membrane breaks.During the metaphase, chromosomes are taken toward the center of the cell by the spindle apparatus. Once in the equatorial plane, chromosomes line up.Each chromatid joins with a microtubule of opposites poles.
In Anaphase, chromatid sisters separate. The bonds that were keeping them together break, and each of them migrate to the opposite poles.In telophase, duplicated chromosomes are already in the corresponding poles, and the nuclear membrane forms again in each pole. Finally, cytokinesis occurs.In conclusion, the interphase is the stage in which the cell duplicates its content. Mitosis is the stage in which the cell divides into two new cells.
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Analyze the graph and complete the statements that
follow.
Average Monthly Rainfall
The greatest amount of rainfall was recorded in the
month of
The least amount of rainfall was recorded in the month
of
40
The relationship between time of year and amount of
rainfall is
30
Rainfall (inches)
W
20
M
10
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Answer: 1. may 2. february 3. nonlinear
Explanation:
The greatest amount of rainfall was recorded in the month of M, and the least amount of rainfall was recorded in the month of W, and one can observe that there is a variation in the amount of rainfall throughout the year, with some months having higher rainfall amounts than others.
What is a rainfall?The graph of average monthly rainfall is a common tool used to visually display the variation in precipitation over time. Precipitation, which includes rain, snow, sleet, and hail, is a critical component of the water cycle and plays a significant role in shaping the Earth's environment. Precipitation patterns can vary widely depending on the location and season, with some regions experiencing very dry conditions while others receive abundant rainfall.
Hence, the greatest amount of rainfall was recorded in the month of M, the least amount of rainfall was recorded in the month of W, and one can observe that there is a variation in the amount of rainfall throughout the year.
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Identify the following carbohydrate:
Question 4 options:
monosaccharide
disaccharide
polysaccharide
Answer:
polysaccharide
Explanation:
it is the structure of raffinose which is a polysaccharide
can anybody tell me which gametes produced by meiosis...
Answer fast
Answer:
sister chromatids?
Explanation:
Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. This process is required to produce egg and sperm cells for sexual reproduction.
Ariana walks into the chemistry class on the day of the lab with flip flops, her hair loosely hanging across her face and wearing her favorite oversized hoodie. She is going to use her designer sunglasses as lab goggles- because fashion first! She can’t wait to play with chemicals and fire!
Please explain to Ariana why she is not prepared for the lab, addressing each of the issues above
Answer:
she is not prepared because she brought unnesasery things
Explanation:
Answer:
ariana needs to wear tight fitting clothes and tie her hair back to avoid getting chemical on them or catching on fire. she needs goggles to properly protect her eyes. she also needs close toed shoes to protect her feet
Explanation:
2 questions.
An element is described as a shiny black solid with 3 valence electrons and 2 energy levels.
What is the name of the element? Is it a metal, nonmetal, or a metalloid?
Answer:
The correct answer is - Boron, a metalloid.
Explanation:
Boron is a metalloid element that has a crystalline shiny black appearance. It is found in solid-state in nature, It is also a micronutrient for the humans. It is placed in the second period of the periodic table of elements.
The electronic configuration of the boron element is - 1s2, 2s2, 2p1, as it is clear that they have 3 valence electrons in their outer shell, and by electronic configuration, it is clear that they are in 2 energy level (2).
Thus, the correct answer is - Boron, a metalloid.
Which of these best explains the difference between eukaryotes and prokaryotes? Choose the correct answer. Eukaryotes have simpler cells and can only be unicellular. Eukaryotes have simpler cells and can be either unicellular or multicellular. Eukaryotes have more complicated cells and can only be multicellular. Eukaryotes have more complex cells and can be either unicellular or multicellular.
Answer:
Eukaryotes have more complicated cells and can only be multicellular
Explanation:
By definition Eukaryotes can only be multicellular; consequently being complex.
A prokaryote is not considered a cell because it has no nucleus.
If a cell has a nucleus it is a Eukaryote if it does not it is a prokaryote
what animal filled the role of top predator in yellowstone before wolves were reintroduced?
Answer:
Explanation:
El Parque Nacional de Yellowstone (Estados Unidos), considerado el parque nacional más antiguo del mundo, fue creado en 1872 durante la presidencia de Ulysses S. Grant. En sus inicios, la fauna del parque no recibió la misma protección que hoy en día: los lobos y los pumas fueron eliminados deliberadamente en 1926 y, al cabo de unos años, la población de ciervos aumentó tanto que los administradores del parque reconocieron que los herbívoros estaban alterando la vegetación, por lo que se realizaron matanzas selectivas para controlar la población de dichos animales. Las matanzas selectivas terminaron a finales de los años 60 y la población de ciervos volvió a aumentar, por lo que finalmente se optó por reintroducir el lobo: 14 lobos de la provincia de Alberta (Canadá) fueron liberados en 1995 y otros 17 lobos canadienses en 1996. "La reintroducción del lobo (Canis lupus) en el Parque Nacional de Yellowstone es el experimento ecológico más celebrado de la historia", así comienza un estudio publicado en Journal of Mammalogy por Mark Boyce, de la Universidad de Alberta.
