Answer:
22,920 years
Explanation:
When the fossil first started to decay, it must have had 100% of its parent carbon-14 atoms. Every 5,730 years, that amount gets cut in half. Let's travel back a ways, to the very beginning, 0 years into the decay. We'll keep track of the time elapsed, the number of half-lifes, and the percent of carbon-14 remaining:
0 years (0 half-lives) - 100%5,730 years (1 half-life) - 50%11,460 years (2 half-lives) - 25%17,190 years (3 half-lives) - 11.5%22,920 years (4 half-lives) - 6.25%That last one represents our situation, so the fossil is 22,920 years old.
Why are models useful in Earth science?
Answer:
because it represents what happens
Explanation:
What are the functions of a petal
purple said chemical bonds
dark green said covalent
Answer:
mmmmmmmmmmmmmmmmm
The incidence of V. vulnificus infections is increasing, especially in northern parts of the United States, compared to 20 years ago. Can you think of any reason why this might be happening?
Answer:
The effects of climate change may be associated with the increased incidence of V. vulnificus infection
Explanation:
Vibrio vulnificus is a harmful bacterium that causes a serious disease due to eating contaminated seafood, which is the main cause of seafood-related deaths in the USA. V. vulnificus is naturally present in the flora of coastal waters around the world and this bacterium has been isolated from a variety of seafood (e.g.., fish, oysters, shrimp, etc). Epidemiologic studies have shown that the incidence of V. vulnificus infection has increased dramatically since 1996. During this same period, climate change has been responsible for the increase in salinity and temperature of the coastal waters (i.e., the natural habitat of this bacterium). In consequence, it is reasonable to suppose that the change in climatic conditions may be associated with the increased incidence of V. vulnificus infection.
True or false:Winds are named by the direction they come from.

ANSWER:
TRUE.
Explanation: Because winds are named from the direction in which they originate, these winds are called prevailing westerlies.
What has to happen to atmospheric
nitrogen in order for it to become
available to plants?
Answer:
To be used by plants, the N2 must be transformed through a process called nitrogen fixation. Fixation converts nitrogen in the atmosphere into forms that plants can absorb through their root systems.
Explanation:
Sickle cell anemia and albinism are both recessive traits in humans. Imagine that a couple, already pregnant with fraternal twins, has just learned that they (the couple) are both heterozygous for both of these traits. As the couple's genetic counselor, the couple asks you what is the probability of having both of the twins be albino and have sickle-cell anemia.
Answer:
81/256
Explanation:
By doing a test cross of albinism and sickle cell anemia you'll see that the probability that one child is unaffected by either conditions will be 9/16. Both children would be 9/16 * 9/16.
Since fraternal twins are developed from two separate fertilization events the probability chance will be independent.
How does energy from the Sun travel to Earth?
through radiation
through convection
through conduction
through the movement of particles
Answer:
A
Explanation:
its right on the enviromental systems cumlative exam on edg 2021
The energy from the Sun travel to Earth through radiation.
Heat transfer by radiation
Radiation is a method of heat transfer that does not require a material medium for the heat transfer process.
Energy transfer from the sunThe energy transfer from the sun reaches the earth through radiation process since the the energy travels in wave form.
Thus, the energy from the Sun travel to Earth through radiation.
Learn more about radiation here: https://brainly.com/question/24469662
A disease infects an organism, causing the organism's cells to have less chloroplasts. How will the organism be impacted by having less chloroplasts?
The organism will have less chlorophy reducing its ability to collect energy
The organism will have less cellulose, reducing its ability to remove waste
The organism will absorb less oxygen, reducing its ability to produce sugar
The organism will absorb less water, reducing its ability to create DNA
Answer:
the organism will have less chlorophyll
Explanation:
chloroplasts contain chlorophyll
Chlorophyll is a green pigment, without it a plant is discolored meaning it lacks of chlorophyll. Less photosynthesis would occur, and less glucose is made as a result. There is less energy released for growth as glucose is needed for respiration.
Describe a circumstance in which a breeder might choose to use artificial insemination over natural breeding methods.
Answer:
farmer may want to use artificially insemination to make sure that a specific breed of cows is in his/her herd.
Imagine that you are standing in a field and you see a group of butterflies. You notice an individual butterfly that looks significantly different from the others in the population. Its difference allows the butterfly to escape predation more efficiently than the other butterflies. How might this trait have arisen in the individual
Answer:
Explanation:
Mutation is a sudden change in the genome of an organism that is heritable.
Mutation occur due to a spontaneous change in the sequence of a gene, it can occur during DNA (deoxyribonucliec acid) replication, mitosis, meiosis. Some mutation are beneficial, some are detrimental while some could be deleterious. Mutation is a rare occurrence usually one in several hundreds or thousand
The unique traits that was reveal in the bird is due to mutation, it is beneficial because it kept it away from predation it is a rare case.
what is the general trend in the elk and wolf populations between 1990 and 2000?
Answer: Decrease
Explanation:
If
you were given information to identify an biome, which would be the most helpful?
the number of different species
the stability of the ecosystems
the complexity of the food web
the average temperature and rainfall
What is the definition of taxonomy?
A. A science, law, or principle of classification that helps build taxonomic trees that map the development and evolution of a species
B. A science, law, or principle of classification that allows biologists to map the development of species that are still evolving
C. A science, law, or principle of classification that helps classify information on a species based purely on their Genus and Species
Answer:
Option (C) is the correct answer.
Explanation:
Taxonomy: It is a process of classifying, organizing, and naming things such as plants, animals, microorganisms, and other living things.
Carolus Linnaeus a father of taxonomy,
Taxonomy utilizes hierarchical arrangement.
There are eight taxonomic categories:
Domain
Kingdom.
Phylum.
class.
Order.
family.
genus
Species.
Use the following table to answer the question:
Element
Mass Number
Atomic Number
Aluminum
27
13
Nitrogen
14
7
Helium
4
2
Fluorine
19
9
please help
Which element has the least neutrons in the nucleus?
Aluminum
Nitrogen
Helium
Fluorine
Answer:heh
Explanation:
Aluminium , mass no = no of proton + neutron = 27
atomic no = no of proton = 13
no of neutron = 27 - 13 = 14
Nitrogen , mass no = no of proton + neutron = 14
atomic no = no of proton = 7
no of neutron = 14 - 7 = 7
Helium , mass no = no of proton + neutron = 4
atomic no = no of proton = 2
no of neutron = 4 - 2= 2
fluorine , mass no = no of proton + neutron = 19
atomic no = no of proton = 9
no of neutron = 19-9 = 10
Answer:
helium
Explanation:
i took the test and got it right... it also has the smallest number
The color of a light wave is determined by its wavelength. On the COLOR tab, slowly drag the Light wavelength slider back and forth and observe the effect on oxygen production. How does the color of light affect the rate of photosynthesis
Answer:
The color of light determines how effective chlorophyll pigment will be at absorbing light.
Explanation:
Photosynthesis is a metabolic process that requires light, which is an electromagnetic radiation. Light on the electromagnetic spectrum is determined by wavelength. Each region/color of light occurs at a specific wavelength.
Hence, chlorophyll pigment, which is the major photosynthetic pigment effectively absorbs blue and red light in the visible light region of the electromagnetic spectrum. Hence, the rate of photosynthesis will be affected negatively if the color of light is not the one stated above.
the diagram shows a bacterium. Which labels best complete the diagram
Answer:
X - Flagellum, Y - Bacterial DNA, Z - Cytoplasm
Explanation:
A bacterium is a living thing that are majorly known for causing diseases but are important for human life.
A bacterium is also consist of several organelles such as cell wall, cytoplasm, flagellum, bacterial DNA, cytoplasm, ribosomes and others.
The diagram shows three main organelles that are X - Flagellum, Y - Bacterial DNA, Z - Cytoplasm. Flagella functions for the locomotion of the bacteria, bacterial DNA is a genetic material of the bacteria, and cytoplasm is a gel-like matrix composed of enzymes, water, nutrients and other waste material.
Hence, the correct answer is "X - Flagellum, Y - Bacterial DNA, Z - Cytoplasm".
What is the role of helicase in DNA replication?
Answer:
The helicase is essential because they separate the double-stranded DNA into single strands so that it could be copied.
Hoped this helped!
(20 POINTS) How would your body repair a skinned knee?
Answer:
As soon as you cut or scrape skin anywhere on your body, special blood cells called platelets spring into action. Platelets stick together like glue at the cut, forming a clot. This clot is like a protective bandage over your cut that keeps more blood and other fluids from flowing out.
(Hope this helped :> )
Please hit the brainliest (golden crown)
-Thanks^^
Which behavior is a response to an external stimulus?
A. An elephant drinks water to quench its thirst.
B. A dog vomits during an illness to rid itself of pathogens.
C. A child gets a fever to fight off the flu.
D. A turtle suns itself on a rock during a cool day.
Answer:
The answer is in picture below
Explanation:
Hope this helps <3
Identify the muscle marked by the star (*): *
Answer:
Deltoid is a large triangular muscle that covers the glenohumeral joint, where your upper arm inserts into your shoulder socket. Pectoralis major is a large, fan-shaped muscle stretching from your collarbone to mid-chest.
Explanation:
Dr. Digger, a paleontologist, finds a fossil that he describes in his journal.
The creature was approximately 1 meter long, with its backbone fused into a large shell covering the body cavity. It had a beaklike mouth, without teeth, and all four limbs were in the form of flippers.
Based on anatomical similarities, to which modern animal is Dr. Digger’s creature most closely related?
zebra
bony fish
sea turtle
snake
Answer:
sea turtle
Explanation:
it is conected to a shell and has flippers
Why does Type 1 diabetes result in high blood pressure?
HELP!!!
Explanation:
Some diabetics neglect to take insulin doses specified for them throughout the day or follow some wrong practices that reduce its effectiveness, which causes a decline in its role in processing glucose to produce the energy needed to perform daily activities, which leads to its deposition in the bloodstream.
Transposable elements can induce mutations by all of the following mechanisms EXCEPT: disrupting a gene when inserted into it. facilitating recombination between transposons, producing chromosomal mutations. producing double-stranded breaks during excision, leading to chromosomal mutations. Activating genes with their own promoter, dysregulating them.
Answer:
Activating genes with their own promoter, dysregulating them.
Explanation:
Transposable Elements (TEs), also known as transposons, mobile elements or jumping genes, are genetic sequences able to move within a host genome by a mechanism called 'transposition'. As a result of their transposition, TEs may cause diverse genetic alterations and disrupt host gene expression at the integration site. Some of the most common deleterious effects induced by TE transposition include, among others, insertional mutagenesis, duplicated sequences, chromosome translocations, etc. Moreover, although it has been shown that some types of TEs contain transcription factor binding sites (as well as cis-regulatory motifs), they don't have promoter sequences that activate host gene expression upon TE transposition.
What is the IMA of the following pulley system?
Answer: IMA = Fr/Fe
Explanation:
IMA stands for Ideal Mechanical advantage.
The IMA of pulley system can be defined as the ratio of output force to input force.
From the given pulley system,
The input force = Fe
The output force = Fr
Hence, IMA of the given pulley system,
IMA = Fr/Fe
which of the following is necessary for cellular respiration and photosynthesis to occur
Answer:
Sunlight!
Explanation:
What was happening in history when this mutation took off in parts of Europe and Africa?
PLEASE SOMEONE HELP ME I’M REALLY STRUGGLING
Answer:seventy-seven thousand years ago, a craftsman sat in a cave in a limestone cliff overlooking the rocky coast of what is now the Indian Ocean. It was a beautiful spot, a workshop with a glorious natural picture window, cooled by a sea breeze in summer, warmed by a small fire in winter. The sandy cliff top above was covered with a white-flowering shrub that one distant day would be known as blombos and give this place the name Blombos Cave.
Explanation:
1 An animal that eats other animals for energy are called
2. Several different populations living together live in an
3. An ecosystem contains ONLY living organisms. (True or False)
4. The food chain arrow going from the mouse to the owl shows that the
mouse is the
5. What level of organization in an ecosystem comes AFTER population?
6. Organisms that eat autotrophs.
7. The start of the flow of energy in every food web is the
8. ---------- predators live on the top of an energy pyramid.
4. A plant that makes its own food from sunlight, air, and water is a
10. Living things that break down decayed plants and animals into smaller
organisms are called
Answer:
heterotrophs animal=1
Explanation:
heterotrophs animal=1
4=aututrops plant
What is the correct "height" or "size" for a piece of oils rigs to become a candidate for "rigs to reef." Remember, oil rigs can be cut into different sizes or parts.
Answer and Explanation:
An oil rig is a type of piston ring which is situated in the ring grooves. The oil ring is commonly used on small engines to wipe excess oil from the wall of the cylinder during the piston's movement. Through the opening of rings, excess oil returned to the oil reservoir. These rings are not used on the two-stroke cycle engines. These rings are one-piece or two-piece. An oil ring seals the combustion chamber through inherent pressure and controlling the consumption of oil. The inherent pressure of the oil ring is very high on the piston. These rings use an expander, high-pressure unit and inherent pressure. The oil rings are also used to spread the oil around the liner surface. These rings can be cut into various sizes. An oil ring has an axial.
The difference betwen a biome and an ecosystem is
O a biome is all ecosystems of one kind
an ecosystem is all biomes of one kind
a biome is all communities of one kind
the biosphere includes all biomes
Answer:
a
Explanation:
hope it helps you though
