*
2
Which of the following is a true statement about gravity?
А
It acts on all matter in the universe.
It pushes objects away from one another.
С
It does not exist in outer space.
D
It gets weaker the closer you get to the sun.
20
Answer:
c is the right answer just look at the question for good sake of you can float in space than there is no gravity
3 examples of biotic factors
Answer:
animals, plants, trees, grass, bacteria, moss, or molds.
Explanation:
Biotic components, or biotic factors, can be described as any living component that affects another organism or shapes the ecosystem.
Answer:
In general, biotic factors are the living components of an ecosystem and are sorted into three groups: producers or autotrophs, consumers or heterotrophs, and decomposers or detritivores. Examples of biotic factors include: Grass as producers (autotrophs). Mouse, deer, and owl as consumers
Explanation:
What happens when oxygen atoms share electrons?
A. They form polar molecules
B. They form covalent bonds
C. They form ionic bonds
D. They form water molecules
Answer:
They form covalent bonds
Explanation:
They occur when atoms achieve stability by sharing electrons. covalent bonds are often represented as single lines in chemical formulas.
3 Question
Select the correct answer.
Which of these is a component of the atmosphere?
rock
oxygen
sediments
soil
Answer:
oxygen
Explanation:
Four o'clock plants can have green leaves, white leaves, or variegated leaves (leaves with areas of white and areas of green). The white regions of the leaves lack functioning chloroplasts. The transmission of leaf color in four o'clock plants demonstrates organelle inheritance. In this problem, you will explore this inheritance pattern. Which of the following crosses between four o'clock plants could produce progeny plants with green leaves?
1. G variegated (female) x variegated (male)
2. G green (female) x white (male)
3. G white (female) x green (male)
4. G white (female) x variegated (male)
5. Gvariegated (female) x white (male)
Answer:
2. G green (female) x white (male)
Explanation:
The cross that could produce progeny plants with green leaves would be the cross between a green female and a white male.
Since the transmission of leaf color in the plant demonstrates organelle inheritance, the female controls which leaf color is inherited by the progeny. Organelles are generally located in the cytoplasm which is largely contributed by the female egg during fertilization. Hence, organelle inheritance are controlled by the female and that is why they are often referred to as maternal inheritance.
Therefore, a cross involving a green female and a white male would largely yield green progeny provided that the trait inheritance follows an organelle inheritance.
Depending on the trait and species involved, the rate of evolution can vary greatly. Peppered moth coloration changed quickly over the 200 years after the start of the Industrial Revolution. However, size increases and color changes in the peacock tail occurred over thousands of years. Which of the following explains the reason for the rapid evolution of peppered moth coloration compared to the evolution of size and color in peacock tail feathers?
(A) There was a selective disadvantage to increasing the size of peacock tail feathers, which limited its evolution.(B) There was stronger selection in the case of peppered moths compared to that of peacock tail feathers.(C) There was disruptive selection in the peppered moth population and stabilizing selection in the peacock population.(D) The peacocks were in Hardy-Weinberg equilibrium, whereas the peppered moths were not.
Answer:
The answer is B
Explanation:
B
The optical microscope is regularly used to identify bacteria and viruses. In 1918 the Spanish Flu infected almost one third of the world and was thought to be caused by bacteria. However, a virulent virus was the cause of the Spanish Flu. From what we have learned throughout this lab on microscopy, why weren't scientists able to identify the Spanish Flu with a microscope?
Answer:
In 1918, one of the deadliest pandemics in history took place, known as the Spanish flu. The flu infected almost 500 million individuals globally, that is, about 33 percent of the world's population. Due to the Spanish flu, the death of about 20 to 50 million people took place.
The general symptoms of the first wave of Spanish flu were fever, chills, and fatigue. However, during the second wave, the people started to die within hours after the development of the signs, due to the development of a fluid taking place within the lungs resulting in suffocation.
At the time of the Spanish flu pandemic, not much was known regarding the composition of the virus. The scientists at that time were not able to make a difference between a bacteria and a virus. This made it tough for scientists to determine the Spanish flu with the help of a microscope.
WILL GIVE BRAINLIST.Use the drop-down menus to answer the questions.
Label the type of igneous rock that will form at point A. ____
°Extrusive
° Intrusive
°Lava
°Magma
Label the type of igneous rock that will form at point B. _____
°Extrusive
°Intrusive
°Lava
°Magma
Answer:
Point A - Intrusive igneous rock
Point B - Extrusive igneous rock
Explanation:
Intrusive igneous rocks are rocks which is formed by molten magma that cools and solidifies below and within the surface of the earth, thereby forming large crystals beneath the earth surface. Examples of Instrusive igneous rocks gabbro, granite, peridotite etc.
Intrusive Ignoeus rock is formed at point A in the diagram given above.
Extrusive Ignoeus rock, on the other hand, is the opposite of Intrusive igneous rock. Extrusive igneous rock is formed when molten rocks, called magma, erupts from beneath the earth and cools and solidifies on the surface of the earth, thereby forming small crystallized rocks. Examples of extrusive igneous rocks are basalt, pumice, etc.
Extrusive Ignoeus rocks would formed at point B in the diagram above.
Answer: the other persons answer is correct
Explanation:
Nucleotides are the monomer for which biomolecule?
DNA
Explanation:
DNA and RNA are made up of monomers known as nucleotides. The nucleotides combine with each other to form a polynucleotide, DNA or RNA. Each nucleotide is made up of three components: a nitrogenous base, a pentose (five-carbon) sugar, and a phosphate group .
Which of the following is not part of Darwin’s theory of natural selection?
A. Organisms produce more offspring than can survive in nature.
B. Over time, individuals with advantageous variations make up most of the population.
C. Some individuals in a population have useful variations that are passed on to their offspring.
D. Species can go into extinction if they cannot adapt to their environment.
I think the answer is option D
D ) species can go into extinction if they cannot adapt to their environment
which affect is one likely result of a forest fire
Answer:
See below
Explanation:
Death of animals due to burning alive or serve injury that they cannot recover from.
launchpad A Drosophila mutation called singed (s) causes the bristles to be bent and misshapen. A mutation called purple (p) causes the fly’s eyes to be purple in color instead of the normal red. Flies homozygous for singed and purple were crossed with flies that were homozygous for normal bristles and red eyes. The F1 were intercrossed to produce the F2, and the following results were obtained. What are the genotypes of the parental flies in Cross 1
Answer:
ppss and PPSS
Explanation:
Just as indicated in the question above, Flies homozygous for singed and purple were crossed with flies that were homozygous for normal bristles and red eyes.
And a Drosophila mutation called singed (s) causes the bristles to be bent and misshapen.
A mutation called purple (p) causes the fly’s eyes to be purple in color instead of the normal red.
Thus, the genotypes of the parental flies in Cross 1 are
PPSS and ppss
With respect to mammalian cell culture, which of the following statements is true? During the establishment of a cell line, senescence is the last stage of the cell's life. Rodent cells cultures undergo spontaneous transformation with similar frequency to human cell cultures. Media used for cell growth contain proteases and a divalent cation chelator to help cells adhere to the surface. Embryonic cell lines do not undergo senescence nor do they have a finite life span.
Answer:
Media used for cell growth contain proteases and a divalent cation chelator to help cells adhere to the surface.
Explanation:
Mammalian cell structure is the process where animals cells are grow in vitro in a flask or dish. The methods, equipments, reagents and supplies use in this type of culture prevent contamination and maintain cell culture purity. Protein enzymes like Serine protease breaks the cellular matrics interaction between the cells. In cell culture, the focal adhesions that are anchoring the cell to the culture dish is cut away. Most trypsin solutions for cell culture also contain EDTA which acts as a chelator for calcium. When calcium is remove from a solution, cadehrin that hold cells to each other break down and cells become separated from each other.
n
Question 4
1 pts
Cholesterol is made by the liver. It is a precursor to sex hormones and vitamin
D. It is also a part of our cell membranes. Cholesterol is
not an essential nutrient
an essential nutrient
O it depends on your medical conditions
O is essential to only vegans
Next >
< Previous
Answer: choice B
Explanation:
Cholesterol is an essential nutrient.
Despite many peoples beliefs that cholesterol is harmful, it's actually essential for your body to function. Cholesterol contributes to the membrane structure of every cell in your body. Your body also needs it to make hormones and vitamin D, as well as perform various other important functions. Excess amounts of dietry cholesterol intake can be harmful.
Many communities in Virginia benefit from watershed protection programs.
Which natural phenomena would most likely create a need for assistance from these particular programs? Check all that apply.
1.earthquakes
2.flooding
3.hurricanes
4.runoff
5.tornadoes
Answer:2. Flooding and 4 run off
Explanation:Watershed areas are prone to flooding. They also cause a lot of runoff
Answer:
2 4
Explanation:
You are employed at a biotech company, working on a new drug, named XYZ. Your boss wants to know how this compound move into red blood cells, and what its concentration will be in red blood cells. He has provided you with plenty of samples of drug XYZ, and you have the means to measure its concentration (mol^-1) inside and outside red blood cells, as well as the concentration of any metabolites of drug XYZ. He has now asked you for a protocol. Provide protocol to test this options:
a. The drug will move into red blood cells by diffusion, but may be metabolized to another compound over time.
b. The drug will move into red blood cells by diffusion and, with time, have equal concentrations in red blood cells and plasma.
c. The drug will enter red blood cells by protein-facilitated diffusion, and, with time, have equal concentrations in red blood cells and plasma.
d. The drug may be actively taken up by the red blood cells by protein-mediated transport.
Answer:
Go to the first one and there it is
Explanation:
3 examples od abiotic
Answer:
Wind.
Rain.
Humidity.
Latitude.
Temperature.
Elevation.
Soil composition.
Explanation:
Answer:
Wind.
Rain.
Humidity.
Latitude.
Temperature.
Salinity
Elevation
pollution
Radiation
Abiotic factors make up much of the variation seen between different ecosystems. By determining the availability of essential resources such as sunlight, water, oxygen, and minerals, abiotic factors influence which organisms can survive in a given place.
WILL GIVE BRAINLIST. Identify the materials label in the image.
° label the molten material found at point A. ______
° label the molten material found at point B. ______
Answer:
ANSWER:
Explanation:
A magma
B lava
The material labelled in the molten material which is found at point A is magma and the one labelled in the molten material found at point B is lava.
What is the difference between magma and lava?Magma is the molten or semi-molten natural material from which all the igneous rocks are formed on the Earth. Magma is found beneath the surface of the Earth, and the evidence of magmatism has also been discovered on the other terrestrial planets and some of the natural satellites as well. Besides the molten rock, magma may also contain some suspended crystals and gas bubbles in it.
Lava is the molten or partially molten rock which has been expelled out from the interior of a terrestrial planet such as the Earth. Lava may be erupted at a volcano or through a fracture in the Earth's crust, on land or under the water, usually at the temperature ranges from 800 to 1,200°C. The volcanic rock resulting from the subsequent cooling of the material is also often called lava.
Learn more about Volcano here:
https://brainly.com/question/12945128
#SPJ2
In what phase do the organelles disperse out into the daughter cells, and the cell prepares for cytokinesis?
1. Prophase
2. Interphase
3. Mitosis
4. Telophase
PLEASE HELP !!!
Psychrophiles are organisms that can grow at pH = 12.
O True
O False
Answer:
false is ur answer tq thanks
Explanation:
highest ph is 7 so it is false
What is the utilized equipment for studying fluorescence-labelled cells? What are the advantages of labelling the cells?
Answer:
Fluorescent labeling of cells helps in ensuring more visibility of the properties of the cell.
The equipment used in studying fluorescence-labelled cells include epi-fluorescence microscope which helps in providing a more dimensional view of the cells. The spectrophotometers is also used to determine the chemical properties of the cells through the intensity of light measured with this equipment. The flow cytometer is also used in this process of study of fluorescent labeled cells.
A antibiotic that block protein synthesis and have broad spectrum
activities with relatively low toxicity is:
A. bacitracin
B. penicillin
C. vancomycin
D. erythromycin
E. levofloxacin
Which of the following can cause acid precipitation?
A. The use of solar panels
B. The use of Hydroelectricity
C. The use of coal
D. All of the above
Answer:
C. The use of coal
Explanation:
1.In binomial nomenclature of organisms, every species name includes two words. The first word is the name of the _______.
2.A monophyletic group or clade consists of a single _______ and all of its descendants.
3.Cladograms sometimes indicate _______, or shared characteristics. All species have that characteristic from the indicated point forward.
4.What's our system of naming organisms called, and what are the two most specific categories of organization?
5.If a scientist is studying the evolutionary relationship between two species of birds, what tool could she use to help her chart their relationship?
6.How is one clade differentiated from another clade?
7.Which type of character provides useful data for cladistic analysis?
8.What technological development allowed for a more detailed understanding of the relationship between species?
Answer:
1. Genus
2. Common ancestor
3. Synapomorphies
4. The system is called binomial nomenclature, and the specific categories used are genus and species.
5. The scientist could use a phylogenetic tree to help visualize the evolutionary relationship.
6. One clade is differentiated from another clade by a branching point within the phylogenetic tree that's defined by some character or characters.
7. Since cladistics depict an evolutionary relationship between organisms, the traits that are studied and categorized are homologous traits.
8. DNA sequencing is the technological development that allowed scientists to gain a more complete understanding of the relationships between species.
Explanation:
In binomial nomenclature of organisms, every species name includes two words. The first word is the name of the genus.
A monophyletic group or clade consists of a single common ancestor and all of its descendants.Cladograms sometimes indicate synapomorphies or shared characteristics. All species have that characteristic from the indicated point forward.The system of naming organisms is called binomial nomenclature, and the specific categories used are genus and species.The tool that she could use to help her chart their relationship is the phylogenetic tree.A clade is differentiated from another clade by a branching point within the phylogenetic tree.The type of character that provides useful data for cladistic analysis are the homologous traits.The technological development that allows for a more detailed understanding of the relationship between species is DNA sequencing.Read related link on:
https://brainly.com/question/16554570
Which of the following statements is correct regarding chromosomes?
A. Chromosomes are strands of DNA, tightly wrapped up, that are located in the nucleus.
B. Chromosomes are strands of RNA, tightly wrapped up, that are in the cytoplasm.
C. Chromosomes are strands of RNA, loosely wrapped up, that are located everywhere in the cell.
D. Chromosomes are strands of DNA, tightly wrapped up, that are located everywhere in the cell.
Answer:
A. Chromosomes are strands of DNA, tightly wrapped up, that are located in the nucleus.
Explanation:
Hope this helped and pls mark me brainliest
The statement that says "Chromosomes are strands of DNA, tightly wrapped up, that are located in the nucleus" is correct regarding chromosomes.
Chromosomes are the highly organized structures inside biological cells, made up of DNA and other proteins, and where most of an individual's genetic information resides.
Chromosomes have a double structure, composed of two structures parallel to each other and joined by a centromere, called chromatids.
In eukaryotic cells (with a defined nucleus), the chromosomes are elongated and found in the nucleus, while in prokaryotic cells, such as bacteria, these appear as circular rings closed in the nucleoid.
The chromosome allows the DNA information to be conserved and evenly distributed.
Therefore, we can conclude that chromosomes are condensed strands or rings of DNA and are located in the nucleus of cells when they are not dividing.
Learn more about chromosomes here: https://brainly.com/question/12463363
Which best describes the process of peer review ?
Answer:
Scientists examine each other's work often to make sure it is not biased or unreliable. this makes for a group effort and reliable information.NOT JUST SCIENCE
Many fields outside of science use peer review to ensure quality.
Explanations : Peer review is the process of peers in the field of the work review the work and give opinion of it
Help me please with this
1) Identify the most abundant greenhouse gas.
It seems to be Carbon dioxide in your chart
2) State one human activity that is the source of this gas.
Try, The gas that the vehicles spew out while moving (Is it good enough?)
3) State one negative effect of greenhouse gases in the earths atmosphere.
Too much of any greenhouse gases could lead to our planet warming up or Global Warming.
Just as the saying goes, " Too much of a good thing is a bad thing"
Hope this helped :)
what describes the relationship between DNA, genes, and chromosomes
Answer:
DNA ( deoxyribonucleic acid) is a chemical substance which is called as the genetic material of all living organisms. It is packaged into the threadlike structure, called as chromosomes. This means that chromosomes are composed of a chemical substance, which is called as DNA.
Whereas, genes are the segment of DNA ( which code for specific proteins) present on the chromosomes. Thus, they carry information for specific trait of the individual ( like eye color)
In summary, their composition and functions are similar as all play a significant role in passing information from one generation to next and thus, determine the characteristics of the offspring.
Answer:
DNA carries instructions for making the proteins a cell needs.
DNA molecules are found in chromosomes.
Genes are segments of DNA that contain instructions that code for proteins.
Explanation: just did it on edge 2020
Telophase is accompanied by the division of cytoplasm between two daughter cells . What is this process called
Answer:
Cytokinesis
Explanation:
Cytokinesis is similar to telophase. The cell devides it cytoplasm into two pieces which creates two daughter cells.
What is the disease called that increases your age with extreme progression?
Answer:
werner syndrome
Explanation:
Werner syndrome is a rare progressive disorder that is characterized by the appearance of unusually accelerated aging (progeria). Although the disorder is typically recognized by the third or fourth decades of life, certain characteristic findings are present beginning during adolescence and early adulthood.
hope it helps please mark me brainliest xD
Answer:
ur mum
Explanation:
