Explanation:
babanaj mamlalai kaakk
If the half-life of a radioactive substance is 500 million years and you have
192 atoms of it, how many half-lives will have passed by the time that only 3
atoms of the substance remain?
A. 4
B. 5
C. 6
D. 2.
The number of half-lives that has elapsed when 3 atoms of the radioactive substance remains is 6 (Option C)
Data obtained from the questionHalf-life (t½) = 500 million yearsOriginal amount (N₀) = 192 atomsAmount remaining (N) = 3 atoms Number of half-lives (n) =?How to determine the number of half-lives2ⁿ = N₀ / N
2ⁿ = 192 / 3
2ⁿ = 64
2ⁿ = 2⁶
n = 6
Learn more about half life:
https://brainly.com/question/26374513
#SPJ1
Sven discovered a new organism. It is unicellular, has no nucleus, and its cell wall lacks peptidoglycan. To which domain does Sven's new organism belong?
a- Archaea
b- Bacteria
c- Eukarya
Answer:
Archaea
Explanation: It has prokaryotes that consists lack of peptidoglycan. Hope it helps :)
Sven’s organism if a is a member of archaebacteria Kingdom, does option "A" is correct
What is an archaebacteria?Archaebacteria are the oldest inhabitants of Earth, It is considered as a separate Kingdom.
Archaebacteria are single celled, lacks nucleus, genetic material is RNA, chemoautotrophic, anaerobic bacteria.
Archaebacteria is found in extreme living conditions, for example hydrothermal vents and sub zero polar region
Bacterial cell wall, nucleus but cell membrane is composed of peptidoglycan
Eubacteria's cell membrane is also composed of Peptidoglycan
Hence, archaea is the correct option
Learn more about Kingdom archaea
https://brainly.com/question/395069
#SPJ2
For a cell to successfully receive a message from a hormone, which of the following must occur?
A: The hormone must attach to the cell's receptor.
B: The hormone must enter the cell.
C: The hormone must produce neurotransmitters.
D: The hormone must be destroyed.
Answer:
B. the hormone must enter the cell
Answer:
A: The hormone must attach to the cell's receptor.
need help with this please
Answer:
Nucleic Acid
Explanation:
Have a good day :)
Phosphorylation of ADP to ATP occurs
A. via ribosomes on the endoplasmic reticulum.
B. in the nucleus
C. in the mitochondria
D. within the cell membrane
Answer:
C. in the mitochondria
Explanation:
Mitochondrial ADP/ATP carriers transport ADP into the mitochondrial matrix for ATP synthesis, and ATP out to fuel the cell, by cycling between cytoplasmic-open and matrix-open states. ... Because these features are highly conserved, this mechanism is likely to apply to the whole mitochondrial carrier family.
Answer:
C. in the mitochondria
Explanation:
Phosphorylation of ADP to ATP occurs in the mitochondria.
Have you ever had to estimate something for which there wasn't an exact answer? What was it? What tools did you use to
make your estimation? Discuss.
Answer: Yes, estimation of a population of plant species in a given area. The tool I used was a QUADRAT.
Explanation:
Plants in a small area are easy to count and their distribution is recorded on a map or scale diagram for the area. For larger areas, quadrats are used to obtain a fairly accurate estimate of the number and types of plants in those large areas.
The ESTIMATION of the population of plants can be done using a method called the quadrat sampling method. Here, a QUADRAT which is a rectangular or square frame(tool) made from thick wire, is thrown at random several times. On each landing, the area covered by if is observed. The type of species and their number within the quadrat are recorded. The average number of times each species appears is calculated and the most frequent or dominant species is then determined.
Some quadrats are specially made to mark off an area for the study of seasonal variations of plants. They are sturdier, larger and permanent and can thus serve their purpose through the seasons. These quadrats often have a mapping grid attached so that the flora within it can be mapped at regular intervals.
Most of the stars on the HR diagram are classified as which type of star?
Answer:
My answer is MAIN SEQUENCE#CARRYONLEARNING
Use what you know about the formation of metamorphic rock to describe three events that could have led to the formation of the rock as it appears today
please i really need help
Answer:
1. a sedimentary rock was introduced to heat
2. It cooled into a solid
3. Wind and other debris could have altered the shape
Which term is defined as the components in an ecosystem, such as soil, air, and sunlight?
biometric
antibiotic
abiotic
biotic
Explanation:
Abiotic factors refer to non-living physical and chemical elements in the ecosystem. Abiotic resources are usually obtained from the lithosphere, atmosphere, and hydrosphere. Examples of abiotic factors are water, air, soil, sunlight, and minerals.
_______________ __________ is the exchange of genetic information between homologous pairs of chromosomes which accounts for genetic variation.
Explanation:
Chromosomal crossover, or crossing over, is the exchange of genetic material during sexual reproduction between two homologous chromosomes' non-sister chromatids that results in recombinant chromosomes. ... Crossing over is described, in theory, by Thomas Hunt Morgan.
Answer:
Chromosomal crossover, or crossing over
is the exchange of genetic information between homologous pairs of chromosomes which accounts for genetic variation.
hope it is helpful to you
the increase to heart rate is a normal homeostatic response and allows for an adjustment of the body's set point during exercise. Identify one other response that your body makes to help maintain homeostasis for a "set point" that can't be adjusted & Describe why it does that. *
Answer:
it increases oxygen levels and decrease carbon dioxide levels
2. Which of the following statements is true?
D
A Cells don't need nutrients.
B Chloroplasts contain a cell's
genetic material.
C Cells grow and reproduce.
All nonliving things are made
of cells.
D
Answer:
Option C
Cells grow and reproduce
Can someone help I’ve been stuck at this question for the past 10 minutes
A _____ extinction occurs when many species go extinct in a relatively short period of time
Answer:
I think it's
A mass extinction occurs when many species go extinct in a relatively short period of time.
Explanation:
Mass extinction is usually defined as a loss of about three-quarters of all species in existence across the entire Earth over a “short” geological period of time. Hence, I think the answer is correct.
Answer:
The correct answer is Mass
How many races of people are there?
Answer:
Caucasian, Mongoloid or Asian, Negroid or Black, and Australoid are the four major race classifications in the world, according to most anthropologists. The racing classification system was created in 1962 by Carleton S. Coon. The four major races are then divided into 30 subgroups.
Explanation:
Answer:
The world population can be divided into 4 major races, namely white/Caucasian, Mongoloid/Asian, Negroid/Black, and Australoid. This is based on a racial classification made by Carleton S. Coon in 1962.
hope this helps
have a good day :)
ps I looked it up
Explanation:
I thought it was a lot xD
What is the site of photosynthesis?
A.leaves
B.stem
C.root
Answer:
Leaves are the major site of photosynthesis
Answer:
Leaves
hope this helps
have a good day :)
Explanation:
The Florida Everglades is a large area of land formed by a wide, shallow, slow-moving sheet of fresh water. Species that live in the Everglades must be able to thrive in
moist conditions year-round. What kind of ecosystem is the Everglades?
1.lale
2.beach
3.wetland
4.coral reef
Can someone please help me?
Answer:
Number 3 (WetLand)
Explanation: I've been to the everglades
Which is not an immune system disorder
- Allergies
- Asthma
- Fungi
- HIV/AIDS
Answer:
Fungi
Explanation:
Answer: Asthma
Explanation: Asthma is Shortness of breath, wheezing, and cough are symptoms of a LUNG ILLNESS characterized by constriction of the airways, the tubes that convey air into the lungs, which are irritated and restricted.
How does air pollution affect water pollution?
Which of the following limit cell size? Select all of the answers that apply.
The expression of both alleles for flower color produces a new pink. this illustrates incomplete dominance. Which of the following would be correct phenotype ratio from a cross between two heterozygous pink flowers
Answer:
C is the answer
Spring 1 and Spring 2 were the same. Then, Spring 1 was pushed together with a little and clamped in place. Spring 2 pushed together a lot and clamped in place. Which spring has more potential energy?
Answer:
spring 2 is the answer..
Answer:
Spring 2
Explanation:
There are _____ organisms at each level as you move up an energy pyramid.
Only _____ energy is available to the next level in a food chain.
A food web is more _____ than a food chain.
Answer:
Is there a picture that goes with this?
As part of the greenhouse effect, Earth’s surface radiates heat back into the atmosphere and the atmosphere absorbs this heat. Why do areas near the equator generally radiate more energy back into the atmosphere than areas near the poles?
Areas near the equator have more clouds in the atmosphere than areas near the poles.
Areas near the equator receive more incoming solar energy than areas near the poles.
The greenhouse effect only occurs near the equator.
The greenhouse effect only occurs near the poles.
Answer:
The correct answer is B. Areas near the equator receive more incoming solar energy than areas near the poles.
Explanation:
The equator is located in the center of the planet from North to South, this location cause this zone and nearby zones to receiver more solar energy than areas near the poles. This occurs because the natural tilt of Earth makes sun rays directly hit the equator all the time of the year, while areas in the poles are not hit directly and the exposition to sunlight varies with the seasons of the years. This explains why in the equator the temperatures are higher than in the poles. Besides this, the difference in radiation received makes areas in the equator radiate more energy back due to global warming gases, and the global warming phenomenon.
Areas near the equator receive more incoming solar energy than areas near the poles.
What is greenhouse effect?Greenhouse effect, a warming of Earth’s surface and troposphere (the lowest layer of the atmosphere) caused by the presence of water vapour, carbon dioxide, methane, and certain other gases in the air.
The equator is located in the center of the planet from North to South, this location cause this zone and nearby zones to receiver more solar energy than areas near the poles.
This occurs because the natural tilt of Earth makes sun rays directly hit the equator all the time of the year, while areas in the poles are not hit directly and the exposition to sunlight varies with the seasons of the years.
This explains why in the equator the temperatures are higher than in the poles. Besides this, the difference in radiation received makes areas in the equator radiate more energy back due to global warming gases, and the global warming phenomenon.
Learn more about greenhouse effect here:
https://brainly.com/question/13706708
#SPJ2
What’s pushes the pathogens away from lungs?
Cilia
Explanation:
Pushes mucus away from the lungs along with any debris that may be trapped in the sticky mucus
______ farming, or production for cash, usually take place on large holdings.
A cut parallel to the midsagittal plane would produce a ________ section. A cut parallel to the midsagittal plane would produce a ________ section. parasagittal superior frontal transverse coronal
Explain why an observer in New York State sees some different constellations in the night sky when Earth is at location A compared to when Earth is at location C.
Answer:
The Earth is Rotating to another location and shownig different groups of Stars
Explanation:
An observer in New York State sees some different constellations in the night sky when Earth is at location A compared to when Earth is at location C because of the continuous rotation of the earth on its axis.
What do you mean by Constellation?A constellation may be defined as a collection of stars that significantly form a recognizable and identifiable pattern in the sky mostly in the nighttime. These collections of stars are traditionally named after their apparent form or identified with a mythological figure.
According to the context of this question, when an observer in New York State sees some different constellations in the night sky when the earth is at location A, but the visualization by an observer may change when the earth is located at location C, this is because of the gradual and continuous rotation of the earth on its axis.
To learn more about Constellations, refer to the link:
https://brainly.com/question/667281
#SPJ2
Where do plants and animals get carbon? Explain
Answer:
From the air
Explanation:
For plants especially its the sunlight. The animals then eat the plants transferring the carbon into their bodies.
Answer:
Where do plants and animals get carbon? Explain
Remember that plants and other producers capture carbon dioxide and deplete it in glucose (C 6 H 12 O 6) through photosynthesis. Then when animals eat plants and other animals, they get the carbon from those organisms.
Explanation:
I hope it helps you :)♫
Assuming these are carbon dioxide molecules, which way do you think the molecules will move and why?
A. Out of the cell. They want to move from high to low concentration (DOWN the concentration gradient)
B. Into the cell. They want to move from low to high concentration (UP the concentration gradient).
Answer:
A. Out of the cell. They want to move from high to low concentration (DOWN the concentration gradient)
Explanation:
Although the cuticle provides important protection from excessive water loss, leaves cannot be impervious because they must also allow carbon dioxide in (to be used in photosynthesis), and oxygen out. These gases move into and out of the leaf through openings on the underside called stomata (Figure 3b).
Answer:
A. Out of the cell. They want to move from high to low concentration (DOWN the concentration gradient)
Explanation:
The option (A) is the correct answer. This statement is the required answer.
Which type of evidence provides the best support for the hypothesis that the ancestors of tetrapods evolved legs before tetrapods were first seen on land?
Answer:
" Fossil record" is the right answer.
Explanation:
Prior knowledge, comprising fossils, rests as well as impressions of species perfectly deposited throughout sedimentary rock throughout early archaeological eras.These are established upon this superpose law which always claims that perhaps the lower layers typically younger than the whole upper ones in uninterrupted factors leading.