Answer:
Joules
Explanation:
W = F * d
F = 1.99*10^3 N
d = 2.1 m
W = 4179 Joules
Which of the following is true about geologic time?
It is extremely easy to model
We have a complete understanding of all geologic time
periods
It is extremely difficult to model because it covers so much
time
HELPLPPPPPPP!!!!!
Answer:
The geologic time scale is the calendar for events in Earth history. It subdivides all time into named units of abstract time called escending order of duration eons, eras, periods, epochs, and ages.
Iguanas in the Galapagos Islands are good swimmers and divers, which gives them the advantage over other species of iguana for being able to find food in the water. Which factor most likely contributes to the natural selection for this species of iguana?
A) Inherited Variation
B) differential reproductive success
C) Competition for space
D) Mutations in genetic code
Answer:
b
Explanation:
Answer:
inherited varietion
Explanation:
i took the test
# difference between monocyclic & polycyclic disease.
Answer:
The monocyclic pathogen follows the black arrows to complete its cycle. Polycyclic pathogens follow the red arrows for the majority of the season and the black arrows at the end of the season. In order for a disease to develop, a pathogen must be present and successfully invade plant host tissues and cells.
Explanation:
here's ur answer bro/sis
what is the relationship between bacteria and the bacteriophage??
Answer:
We have bacteria that live on us, and bacteria have bacterial viruses that live on them. These viruses are called bacteriophages . Viruses differ from bacteria in that they are not made of cells, but instead consist of a piece of DNA (or RNA) packed within a protein coat. A bacteriophage attaches itself to a susceptible bacterium and infects the host cell. Following infection, the bacteriophage hijacks the bacterium's cellular machinery to prevent it from producing bacterial components and instead forces them cell to produce viral components.
Sound waves travel at different speeds through different materials. Through which of the following materials will sound waves travel the fastest?
copper pipe
swimming pool
air on a cold day
sauna filled with steam
Answer:
the sound will travel fastest in a copper pipe
Explanation:
because the liquids in each of the other three answers act like mufflers for the sound which in terms means.thst the sound is slower and quieter.
Why is taxonomy important?
Answer:
Well, it helps us categorize organisms so we can more easily communicate biological information. Taxonomy uses hierarchical classification as a way to help scientists understand and organize the diversity of life on our planet.
Explanation:
thats why its important
which organisms replicate cells by mitosis?
a. animals and bacteria
b. bacteria and plants
c. animal and plants
d. archaea and bacteria
e. archaea and plants
Answer:
d.??????????????????
Answer: C!
Explanation: eukaryotic cells may divide via either mitosis or meiosis. only sexually reproducing eukaryotes can engage in meiosis. all eukaryotes — regardless of size or number of cells — can engage in mitosis.
Having no cell nucleus, archaea do not reproduce via mitosis; rather, they procreate using a process called binary fission. So D AND E are eliminated. And so is B because that has bacteria.
SO FINAL ANSWER; mitosis happens in eukaryotes, plant and animal cells
Duckweed is a tiny floating aquatic plant that can reproduce so rapidly that it can completely cover the surface of small fish hatchery ponds. One proposal to limit the growth of this invasive plant is to use colored panels to shield the ponds, inhibit photosynthesis, and kill this pest. What color filters would you order for the panels in this project
Answer:
Green color filter
Explanation:
It is given that Duckweed grown on water and covers all part of the pond very rapidly. In order to limit their growth is proposed to use a color panel so as to shield the ponds and inhibit photosynthesis process and also kill the pests.
So a green colored panels can be used to shield the pond. This is because the photosynthetic pigments such as the chlorophylls absorbs all the green frequencies of the visible light except for the wavelength that corresponds to the green color. Therefore, by using a green filter, the wavelength corresponding to blue, yellow, red and purple colors are absorbed. Thus the plants would not be able to use the green light for the process of photosynthesis. This would help in limiting the growth of the duckweeds.
nvision in a family the mother has breast cancer and retinoblastoma (both conferred by recessive alleles on chromosome 17, and the two loci are on the same arm of this chromosome and 3 centimorgans apart), while the father does not carry any of these recessive alleles. What is the probability of their daughter having both cancers
Answer:
0%
Explanation:
Two genes/loci are linked when they are located on the same chromosome. Recombination, also known as crossing over, refers to the exchange of genetic material between non-sister chromatids during meiosis. One centimorgan (1 cM) is a genetic measurement of the distance between two loci on the same chromosome in which 1% crossing over occurs. In this case, the mother is an unaffected carrier who has one copy of both linked mutations (i.e., of both breast cancer and retinoblastoma mutations), thereby the expected frequency of recombination in the female meiosis is 3% (3 cM). Moreover, and since the father is an unaffected individual (who does not carry any of these recessive alleles) and both breast cancer and retinoblastoma conditions are caused by recessive somatic mutations, the probability of their daughter having both cancers is 0%, (offspring always receive one copy of each autosomal/somatic chromosome from the mother and one copy from the father).
What could a human living now and a dinosaur living millions of years ago
have in common?
A. They have the exact same DNA.
B. They eat the same things.
C. They need the same amount of energy.
D. They have shared matter.
Answer:
D
Explanation:
Individual amoebae of the slime mold Dictyostelium discoideum aggregate to form a spore-producing fruiting body. Cheaters make spores, but do not contribute to the stalk. Since many more spores with cheating genotypes are dispersed, they have higher fitness. Why does directional selection not lead to fixation of the cheater genotype
Answer:
It is an example of frequency-dependent selection. Due to several cheaters in the population, the fruiting body's stalk is not made properly. So, all individuals have lesser fitness.
Explanation:
Natural selection:
The population contains both superior as well as an inferior organism where natural resources are limiting so it will cause competition between organisms. As a result of competition, it will select superiors, and inferiors are deleted and they are given reproductive advantages. Due to this reproductive advantage new population emerges. It is more suitable for the environment.
Natural selection divides into three parts that are directional, disruptive, and stabilizing selection.
The given question is the example of frequency-dependent selection. Due to several cheaters in the population, the fruiting body's stalk is not made properly. So, all individuals have lesser fitness. Directional selection will not lead to fixation of cheater genotype. This is because cheating can be controlled through high relatedness in social groups, resulting from kin discrimination.
It is controlled through positive pleiotropy, where the cooperation gene has an additional vital function. Cheating will be controlled if stalk vs. spore is a result of environmental, not genetic factors. An example, spore fate can be a result of the position in the mitotic cell cycle.
What determines if a cat has orange or black fur? Is this found on an autosome or a sex
chromosome?
Answer:
The s3x-linked orange locus determines whether a cat will produce eumelanin (black or brown pigment). This gene is located on the X chromosome. The orange allele is O, and is codominant with non-orange, o.
Explanation:
i need the answer to this really wasn’t sure
Answer: the hydrogen is a molecule btw
Explanation:
Guide Questions:
1 Describe your observation based on the table.
2. Which food may be used for building body parts?
Answer:
Egg white and amino acid solution.
Explanation:
Egg white and amino acid solution are the two foods that are used for building of body parts because they have proteins in them that is responsible for the building of muscles of in human body. There are two components of egg i.e. white and yellow part. White is the proteinic part whereas yellow parts having fats and other nutrients. Amino acid solution has amino acids which is considered as the building block from which protein is made.
Label each image as containing atoms only,molecules that are not compounds, or compounds.
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explain why the use of blood type for peternity testing is not conclusive
Answer:
Although blood group studies cannot be used to prove paternity, they can provide unequivocal evidence that a male is not the father of a particular child. Since the red cell antigens are inherited as dominant traits, a child cannot have a blood group antigen that is not present in one or both parents.
hope it helps
Explanation:
Although blood group studies cannot be used to prove paternity, they can provide unequivocal evidence that a male is not the father of a particular child. Since the red cell antigens are inherited as dominant traits, a child cannot have a blood group antigen that is not present in one or both parents.
A technologist is performing a total cell count on a pericardial fluid. She prepares the undiluted fluid on a hemacytometer. An average of 170 cells was seen in the entire ruled area on each side of the hemacytometer. Calculate the total cell count. Group of answer choices
QUESTION 3 How might the Inquisition affect social relationships?
Answer:
ummmmm
Explanation:
give a picture would help you know
Which of these does not add CO2 to the atmosphere?
A.cooking with gas
B.burning wood
C.planting trees
D.riding in a bus
Answer:
Explanation:
C. Planting trees
Carbon dioxide is added are the atmosphere naturally with organisms respire or decompose carbonate rocks are weathered, forests fires occur and volcanoes erupt. Carbon dioxide is also added to the atmosphere through human activities, such as the burning of fossils fuels and forests and the production of cement.
6. Discuss how polymorphism in the cnidarians might have influenced adaptive radiation of the group.
Answer:
Explanation:
The class Anthozoa of the phylum Cnidaria includes a wide range of corals and marine animals. Cnidarian polymorphism: Medusa and Polyp are two phases wherein cnidarians vary their morphology for adaption, resulting in them mostly existing as dimorphic zooids. Finally, as the medusa stage develops, these colonial polyps might differentiate into specialized forms.
Medusa forms possess velum, manubrium, defined radial canals, and accompanying ring canal, as well as other components like ocelli and statocysts, demonstrating their adaptability to their survival. Polyp stages have adaptive radiation, including such stolon and structures like hydranth and planula, to help them escape predators. Other structures commonly found include gonangia and gonopore.
Hydra is a kind of freshwater animal belonging to the class Cnidaria. Hydra is diploblastic, which implies it has two tissues: nerve and muscular tissue. Mesoglea is a gel-like material that separates the epidermis and the gastrodermis. Charles Darwin used these finches in his experiments to illustrate how changes in the environment, allelic alterations, and mutation effect affected the species' adaptive radiation.
Each of the tissues listed below has a specialized function that is linked closely to the structures found within the tissue's cells. Match each tissue on the left with the cell structures and/or organelles on the right that would be abundant in the tissue's cells. Use your lab manual or other outside resources for a description of any structures or organelles that are unfamiliar to you.
Insect flight muscles [Choose ] <
Cells lining the respiratory passages [Choose ] <
White blood cells that engulf and destroy invading bacteria [Choose ]
Leaf cells of cacti [Choose] <
Goblet cells lining the intestinal tract that secrete mucus [Choose ] < [Choose ]
Pancreatic cells that are responsible for creating several digestive enzymes (proteins)
Option of definitions:MitochondriaChloroplastsRibosomesCilia and FlagellaGolgi apparatusLysosomes
Answer:
Insect flight muscles [Mitochondria]
Cells lining the respiratory passages [Cilia]
White blood cells that engulf and destroy invading bacteria [Lysosomes]
Leaf cells of cacti [Chloroplasts]
Goblet cells lining the intestinal tract that secrete mucus [Golgi apparatus]
Pancreatic cells that are responsible for creating several digestive enzymes (proteins) [Ribosomes]
Explanation:
Mitochondria are cell organelles whose main function is energy generation during respiration. They generate energy in the form of ATP which is then used by the cells and tissues for various metabolic function. Mitochondria are abundant in cells whose energy requirements are high such as muscle cells. Therefore, insects flight muscles will have an abundance of mitochondria.
Cilia are finger-like projections on respiratory surfaces whose sweep-like movements help to move particles and fluids out of the airways. In the trachea, the cilia trap particles like bacteria and viruses and then move these trapped particles along with mucus up to the pharynx where it is either coughed out or swallowed into gastrointestinal tract. Therefore, respiratory surfaces like the trachea will have an abundance of cilia.
Lysosome are cell organelles which function to destroy and digest foreign and cellular proteins in the cell. They have an abundance of proteolytic enzymes which degrade proteins at acidic pH. Therefore, white blood cells that engulf and destroy invading bacteria will have an abundance of ysosomes.
Chloroplasts are plant cells organelles which are the sites for photosynthesis. It is abundant in the leaves of plants where photosynthesis mainly take place. Therefore, leaf cells of cacti will have an abundance of chloroplasts.
Golgi apparatus is a cell organelle that helps process and package proteins and lipid molecules, especially those that are to be secreted outside the cell, packaging them into vessicles. They also make and secrete mucus. Therefore, goblet cells lining the intestinal tract that secrete mucus will have an abundance of Golgi apparatus.
Ribosomes are cell organelles whose main function is to synthesize proteins, both for intracellular and extracellular purposes. Proteins such as hormones, enzymes etc, are synthesized by the ribosomes. Therefore, pancreatic cells that are responsible for creating several digestive enzymes (proteins) will have an abundance of ribosomes.
There are different kinds of tissues in the body.
Insect flight muscles is found in the Mitochondria.Cells lining the respiratory passages is found in the cilia and flagella .White blood cells that engulf and destroy invading bacteria linked to the Lysosomes.Leaf cells of cacti are linked to the ChloroplastsGoblet cells lining the intestinal tract that secrete mucus linked to Golgi apparatus.Pancreatic cells that are responsible for creating several digestive enzymes linked to proteins and Ribosomes.What are the types of tissues?There are known to be 4 main types of tissue. They are: The connective tissue, epithelial tissue, muscle tissue, and nervous tissue. The Connective tissue is known as a tissue that helps to supports other tissues.
The Epithelial tissue gives a form of covering such as skin to the body.
Learn more about tissues from
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A paleontologist identified two distinct species of mollusks in the fossil record of a region. In the layer below a mass extinction that devastated the region, the paleontologist observed that shells of species A was present in small numbers over a widespread area whereas species B was abundant and found in a few restricted areas. Which of the following predictions about the fossil record in the layer above the mass extinction is the MOST likely to be supported by further excavations?
a. Species A survived because of its widespread range including some areas that were not as affected by mass extinction.
b. Species A survived because the low number of individuals meant that there was less competition for resources.
c. Species B survived because it was the more abundant and more individuals survived.
d. Species B survived because the population was concentrated in a few areas and had a higher chance of survival.
Answer:
a. Species A survived because of its widespread range including some areas that were not as affected by mass extinction.
Explanation:
The species distribution might confer extinction resistance during massive extinction events. One of the most important reasons for a species -or any other taxonomic group- to survive massive extinction is its wide distribution area.
The broad geographical range of a group -as Species A in the example- enhances the survival chances during mass extinctions. When the event occurs, it severely affects most individuals of a certain area. If the species is restricted to that area, then the species will probably disappear, no matter the number of individuals living there.
But if the species is widely distributed, there are more survival chances. The extinction event will only affect a few regions, but not all of them, meaning that some of the individuals of the species will be able to survive.
Probably as only a few individuals of species A got to survive, they must have suffered the effects of genetic drift after the disaster, causing a reduction in genetic variability.
What causes ripple marks? How can they be used to indicate the position of a layer of sedimentary
rock?
Answer:
Ripple marks are sedimentary structures and indicate agitation by water (current or waves) or wind. Ripple marks are ridges of sediment that form in response to wind blowing along a layer of sediment. ... The symmetry of water-current ripple marks indicate whether they were formed by gentle waves or faster water currents.Answer:
Ripple Marks Ripple marks are sedimentary structures and indicate agitation by water (current or waves) or wind. Ripple marks are ridges of sediment that form in response to wind blowing along a layer of sediment. They are form perpendicular to the wind direction and each ridge is roughly equidistant from the ripple mark on either side.
Explanation:
What are the two main conditions used to describe an area’s climate?
What's the difference between monohybrid and dihybrid crosses?
Question 3 options:
Monohybrid crosses involve one gene; dihybrid crosses involve two genes
Monohybrid crosses involve one allele; dihybrid crosses involve two alleles
Monohybrid crosses are more complicated than dihybrid crosses
Monohybrid crosses involve one organism; dihybrid crosses involve two organisms
Answer:
A monohybrid cross is defined as the cross happening in the F1 generation offspring of parents differing in one trait only. A dihybrid cross is a cross happens F1 generation offspring of differing in two traits.
Explanation:
Answer:
Monohybrid crosses involve one gene; dihybrid crosses involve two genes
Explanation:
what is movement of a part superiorly
Movement of a part superiorly is that you elevates when you move a part superiorly (closer to the top of the head), like shrugging your shoulders.
What is the relationship between CdKs and cyclins?
Answer:
By definition, a CDK binds a regulatory protein called a cyclin. Without cyclin, CDK has little kinase activity; only the cyclin-CDK complex is an active kinase but its activity can be typically further modulated by phosphorylation and other binding proteins, like p27.
What two types of changes to Earth's surface are illustrated in the model above ?
A. Erosion of sand from the beach during WINTER
B. Erosion of sand from the beach during SUMMER
C. Deposition of sand onto the beach during WINTER
D. Deposition of sand onto the beach during SUMMER
Answer:
D
Explanation:
The sand moves from the storage over to the shore/coastline during The summer, therefore, it's D.
The two types of changes to Earth's surface are erosion of sand from the beach during summer and deposition of sand onto the beach during winter. Therefore, the correct statements are option B and option D.
What changes occur to Earth's surface during summer?The model likely shows the effects of seasonal changes on a beach. During winter, waves and currents tend to deposit sand onto the beach, leading to a wider and more expansive shoreline, whereas during summer, waves and currents tend to erode the sand from the beach, leading to a narrower and steeper shoreline.
During the summer, high-energy waves erode the sand from the beach that lead to the formation of cliffs or other coastal landforms as the waves. and during the winter, lower-energy waves deposit sand onto the beach, that lead to the formation of sandbars or other coastal landforms along the shore.
The addition of sand during the winter months can have positive impacts on beach tourism, whereas in summer, negative impacts were seen on beach tourism.
Therefore, the two types of changes to Earth's surface are erosion of sand from the beach during summer and deposition of sand onto the beach during winter.
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Which of the following resources do goats contribute to society?
O rope
O paper
O iron
O dairy
Answer: The correct answer is dairy
Explanation: This answer has been confirmed correct.
Goat milk is used for making cheese and other dairy products.
Why are the lymphatic system and the circulatory system called “closed systems?” (any bots or links will be reported)
Answer:
because the stays in the vessels
Explanation: