A 30 kg object has 3 forces acting on it - one 40 N force to the right, one 20 N force to the right, and one 30 N force to the left. What is the net force on the object?
Answer:
Fnet=F1+F2-F3=40+20-30=60-30=30N
F=ma
30N=30a
a=30/30
a=1m/s^2
Believe me , biology is another thing.
Which of the following is an example of natural selection?
Why are endemic organisms in greater danger of becoming extinct?
Answer:
They are the species which are found only in a particular area. They can be a plant, animal or microorganism. They are at great danger of becoming extinct due to the following reasons: - As they are restricted to a particular area so loss of their habitat is the major reason which could lead to extinction.
Explanation:
Which statement describes the Yadkin watershed?
It is the smallest watershed.
It is the northernmost watershed.
It is a Chesapeake Bay watershed.
It is Virginia’s most productive estuary.
IF YOU GET THIS CORRECT I'LL MARK YOU BRAINLIEST!!
Answer:The answer is A smallest watershed
Explanation:Just took review on e2020 can i have the brainliest??
Answer:
the correct answer is A. it is the smallest watershed
Explanation:
i took th reveiw and got the question right.
Which food web shows the correct sequence of organisms?
Answer: C
Explanation:
Just took the USA Test Prep Test
Soil can take hundreds of years to form. Soil's formation rate depends on rock type,
climate, and the presence of organisms. Is fertile soil a renewable or nonrenewable
resource? Use evidence and scientific reasoning to support your claim.
Pg.344 unit 5
Answer:Irish
Explanation: Spring green green green
Name 1 way a biotic factor interacts with another biotic Factor.
Answers
Some provide nutrients for each other
Explanation:
A new species X is introduced in a forest. How is it likely to affect the local species of that area?
Answer:
Normally, the effects of the species X are introduced in the forest that depends on the herbivores, omnivores and carnivores. Introduction as well as removal of the species is both minor as well as major effects based on the specials in the forest in more enticing manner. Local species feel a comfort.
Explanation:
While wading in the ocean, you look down into the water and notice an umbrella-shaped, translucent animal. It swims by pulsing its body, and long tentacles trail behind it. One of them brushes your leg. Ouch! You feel a burning sensation where it touched you. To what phylum does this creature probably belong? Mollusca Cnidaria Porifera Platyhelminthes
Answer:
cnidaria
Explanation:
the group contains jellyfish which fit that exact description tentacles that sting you with a burning sensation if your skin comes in contact with them
CONCLUSION why is baseball called “the national pastime”?
Need help
Answer: The baseball is a sport played in the eastern United States.
Explanation:
This game is called as the national pass time because this game is played and enjoyed by millions of people to pass their time in leisure activity and enjoy with the team mates and friends.
This sport is continued to be enjoyed in summer and spring. It was named so more than 150 years ago.
how natural selection allows beetles that are camouflaged to flourish in their environment?
Answer:
Natural selection is a adaptation process of evolution.
Explanation:
As the battles are the most diverse type of insects on the planet they consist of about 400,000 or more species of them on the planet. They use camouflaged while others are easily visible and its due to this natural property that they acquired from the environment they can easily blend in with the natural features of the real world. Such as the barks or the branches of the tree. Some of them can chemically be camouflaged as well, mostly to avoid predators and keep them away.Final answer:
Natural selection allows camouflaged beetles to thrive because it increases their survival rate; as predators find it harder to spot them. Environmental changes like pollution can alter the selective pressure, favoring those beetles whose coloration matches the new environment, leading to a population shift in coloration over time.
Explanation:
Natural selection allows beetles that are camouflaged to flourish in their environment because it favors individuals with traits that enhance their chances of survival and reproduction. When a change in the environment occurs, such as pollution darkening the tree trunks, it may cause a shift in the population's coloration. In the context of beetles, if the environment becomes darker due to pollution, predators like birds will find it easier to spot and eat beetles that contrast with their background, hence light-colored beetles will stand out.
On the contrary, dark-colored beetles which blend in with the now darkened tree trunks will escape predation more effectively and have a higher chance of surviving to pass their genes to the next generation. Over time, the beetle population will shift towards more dark-colored individuals – a process analogous to the famous case of the peppered moth during the Industrial Revolution in England. This shift in beetle coloration exemplifies natural selection, where the adaptive advantage of being camouflaged leads to a change in the population's physical characteristics.
1. Write the letter of the dominant allele.
Answer:
B, T
Explanation:
Dominant alleles are represented with an UPPERCASE letter. Recessive alleles are represented with a LOWERCASE letter
The letter of the dominant allele represents the uppercase version of the corresponding gene. In genetics, alleles are different forms or variations of a gene that occupy the same position or locus on a chromosome. Each gene has two alleles, one inherited from each parent.
When determining the letter of the dominant allele, it is important to consider the dominant-recessive relationship between the alleles. The dominant allele is the allele that is expressed or seen in the phenotype when present, even if there is only one copy of it. It masks the expression of the recessive allele.
For example, in the case of eye color, let's say the gene for brown eye color (B) is dominant over the gene for blue eye color (b). If an individual inherits one allele for brown eyes (B) from one parent and one allele for blue eyes (b) from the other parent, their genotype would be Bb. However, since the brown eye color allele (B) is dominant, the individual's phenotype would be brown eyes.
In this case, the letter of the dominant allele is B. It represents the dominant gene for brown eye color.
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20 points & Brainliest answer quickly plsssss
A small, jagged particle with a density of 1.2 g/cm3 deposits on the ground before a large, round particle with a density of 0.82 g/cm3. Which most likely influences the rate of deposition of the jagged particle?
Answer:
Answer: D; Irregular shape
Explanation: I'm not entirely positive but I do believe that the factor they're wanting you to notice in this question is the shape, as it states "deposition of the jagged particle". The shape affects the rate, as in the notes directly from the video it states "round particles settle more quickly".
Answer:
d
Explanation:
the thingy something something im sorry i need points but i believe the answer is d
can ecilpses occur on other planets
Answer:
The answer is no. Total solar eclipses can happen on other planets too, as long as they have moons that are big enough to cover the sun's disk from the planet's perspective and orbit the planet on the same plane as the sun, astronomers told Live Science.
Explanation:
What percent of the females will have red eyes
Answer:
I think the answer is less than 1% of the human population has red/violet eyes.
Explanation:
This occurs in extreme cases of albinism where melanin content is very low in a person's eyes.
Biotechnology uses a procedure called genetic engineering. Which best describes genetic engineering.
a--making artificial DNA in the laboratory from chemicals
b--adding DNA from one organism into the DNA of another organism
c--cutting out pieces of DNA from an organism under a microscope
d--replacing DNA in one organism with DNA from another organism
Why choose that gene for PCR in the bacterial identification lab?
It is highly variable so will show slight differences between distantly related species
It is just what everyone else does, the actual gene doesn't matter, just the sequence comparison.
The primers are easy to obtain for it.
it is highly conserved so will show slight differences between distantly related species
Answer:
Background
During the course of a bacterial infection, the rapid identification of the causative agent(s) is necessary for the determination of effective treatment options. We have developed a method based on a modified broad-range PCR and an oligonucleotide microarray for the simultaneous detection and identification of 12 bacterial pathogens at the species level. The broad-range PCR primer mixture was designed using conserved regions of the bacterial topoisomerase genes gyrB and parE. The primer design allowed the use of a novel DNA amplification method, which produced labeled, single-stranded DNA suitable for microarray hybridization. The probes on the microarray were designed from the alignments of species- or genus-specific variable regions of the gyrB and parE genes flanked by the primers. We included mecA-specific primers and probes in the same assay to indicate the presence of methicillin resistance in the bacterial species. The feasibility of this assay in routine diagnostic testing was evaluated using 146 blood culture positive and 40 blood culture negative samples.
Explanation:
Results
Comparison of our results with those of a conventional culture-based method revealed a sensitivity of 96% (initial sensitivity of 82%) and specificity of 98%. Furthermore, only one cross-reaction was observed upon investigating 102 culture isolates from 70 untargeted bacteria. The total assay time was only three hours, including the time required for the DNA extraction, PCR and microarray steps in sequence.
A heat source could be considered a source of pollution.. Please select the best answer from the choices provided T F
Answer:
True:
A heat source could be considered a source of pollution.
Explanation:
The reason behind this is that global warming is attributed to the general warming o the planet's temperature without making a specification of a single source or a singular type of origin. It just accounts for warming. One of the major discoveries of this problem was the fast-food chain's contribution to global warming. Saying that the fast-food industry provides a considerable amount of warming to the planet.
Answer:
true
Explanation:
Consider two ecosystems that scientists have labelled as ecosystem A and ecosystem B. The scientists have found that both ecosystems are
home to a roughly equal number of species. However, ecosystem A is dominated by a small number of species that are very abundant.
Ecosystem B, by contrast, has a more even abundance of organisms across Its species.
From this description, ecosystem B is considered
ecosystem A.
A.
less biodiverse than
B.
equally biodiverse as
C. more biodiverse than
D. more valuable than
Ecosystem B is more biodiverse than Ecosystem A due to the more even abundance of different species in it, indicating a higher level of biodiversity.
Explanation:From the descriptions, we can infer that Ecosystem B is more biodiverse than Ecosystem A. This is because, in ecosystem A, there is an apparent dominance of a small number of species, while ecosystem B shows a more even abundance of organisms across its species, which signifies a higher level of biodiversity. Biodiversity is a measure of the variety of organisms present in different ecosystems. This can refer to genetic variation, species variation, or ecological variation within an area, biome, or planet. Greater biodiversity implies greater health for the ecosystem.
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Answer:
1. Why do all the energy we use comes from the
sun?
Answer: This question doesn't have much detail and not all the energy we use comes from the sun. There are multiple sources of energy.
Please help! I need an answer quickly, I'm confused. Plants need to perform the processes of photosynthesis and cellular respiration. Label the model to show these processes.
Answer:
look it up on google if you want to know that fast
Explanation:
thats the smrt thing to do
what kind of ecosystem is the thorn scrub
A. wetland
B. grassland
c. badland
d. shrubland
Answer:d
Explanation:
What does a completely filled circle represent on a pedigree chart? Group of answer choices A female carrier of a disease A male carrier of a disease A female with a disease A male with a disease
Answer: A female with a disease.
Explanation:
A pedigree chart is a diagrammatic representation of the phenotypes that are associated with the members of the family and with their generations. These phenotypes can be responsible for the development of eye color, facial forms, skin color, a particular disease or disorder.
In a pedigree chart a dark circle or filled circle represent that the female is affected by the disease or disorder, whereas a white or unfilled circle represent a female is unaffected or disease free.
Answer:
A female with a disease.
Explanation:
A population of squirrels found in the Midwestern United States looks nearly identical to a population of squirrels found in Canada. The two groups exhibit similar behaviors but have different diets. Describe an experiment that would determine whether they are the same species. Be sure your answer explains how data would need to be collected and analyzed to form a conclusion.
Answer:
The best way to determine if these populations form part of the same species is to study the existence of reproductive isolation between populations. Moreover, the result of an experiment based on the study of reproductive barriers may be complemented with molecular biology approaches that determine the level of sequence homology between populations
What is a hypersaline bay?
What kind of plants live in the desert?
Answer:
Cacti and Succulents, Wildflowers, and Trees, Shrubs, and Grasses.
Answer:
Plants that usually live in the desert have ways to collect and store water for long periods of time, and have little to no leaves. They might have a specific kind of root or a different way of storing water than other plants. I hope this answer is helpful :)
Explanation:
Select the correct answer,
Which food chain shows the correct flow of energy in an ecosystem?
A eagle - rabbit - Sun - hay
B. rabbit - eagle - hay - Sun
C.
hay - eagle - rabbit - Sun
OD
Sun - hay - rabbit - eagle
E. Sun - eagle - hay - rabbit
Reset
Wext
Answer:
D) Sun-hay-rabbit-eagle
Explanation:
the sun gives energy through light rays to hay. Hay then gives energy to the rabbit that eats it. This rabbit then gives energy to the eagle that eats it.
7. What is the difference between a marsupial and a placental?
Answer:
The key difference between placental and marsupial is that placental mammals give birth to fully developed young ones while marsupial mammals give birth to undeveloped young ones and keep them in a special pouch until they mature.
Which animal adaptation happened before the others?
O A. Lungs
O B. Backbone and skull
O C. Reproduction on land
O D. Development of a coelom
Answer:
DDDDDDD
Explanation:
Yep.
(:
The animal adaptation that happened before the others is the development of a coelom. The correct option is D.
What is adaptation?Adaptation is a process of changing or suiting the environment for better survival. Adaptations are short-term and long-term. An animal modifies their body part and behavior according to its changing surroundings.
The coelom is the body cavity in animals. They save the internal organs of the body, and they are filled with fluid. In some animals, they act as skeletons, like in worms.
The coelom is cavities of the body, and they were adapted earlier than other organs like lungs or skulls.
Thus, the correct option is D. Development of a coelom.
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HOMOZYGOUS RECESSIVE: Dominant - Round Face Recessive - Square
Face Options:
1: Genotype: AA
2: Genotype: Aa
3: Genotype: aa
4: Phenotype: Round Face
5: Phenotype: Square Face Chose all that apply
Answer:
Explanation:
i need a we