take a look at the fossil made with amber on page 30. how are they formed and what features of the organisms are preserved in Amber?
2. Order the steps of mineral formation from the first stage to the final stage.
Answer:
(1) igneous, or magmatic, in which minerals crystallize from a melt, (2) sedimentary, in which minerals are the result of sedimentation, a process whose raw materials are particles from other rocks that have undergone weathering or erosion, (3) metamorphic, in which new minerals form at the expense of earlier ones owing to the effects of changing—usually increasing—temperature or pressure or both on some existing rock type, and (4) hydrothermal, in which minerals are chemically precipitated from hot solutions within Earth.
Explanation:
Hope this helps
From.
1kvibing
How long will it take for 40.0 grams of Radium-226 (Ra-226) to decay to leave a total of 2.5 grams of Ra-226? Ra-226 has a half-life of 1600 years.
Answer:
6400 years
Explanation:
Given that;
N/No =(1/2)^t/t1/2
No = amount of radioactive material originally present
N = amount of radioactive material present at time t
t= time taken for N amount of radioactive material to remain
t1/2 = have life of the radioactive material
2.5/40 = (1/2)^t/1600
1/16 = (1/2)^t/1600
(1/2)^4 = (1/2)^t/1600
4 = t/1600
t = 4 * 1600
t = 6400 years
Which step in PCR (polymerase chain reaction) is responsible for opening and unwinding the DNA strand to be analyzed?
A) binding
B) elongation
C) denaturation
D) annealing
A confounding variable is an outside variable beyond the control of the race teams and official. What are some confounding variables that could contribute to the speed of the tracks?
Answer:
rain and turns
Explanation:
There are various confounding variables that could contribute to the speed of the track, one of which is rain. Rain is something that the race teams and officials cannot control and affects the speed at which racecars can operate on a track. This is because the Rain wets the tracks which prevents the cars wheels from properly gripping the track and instead causes them to skid. Another confounding variable would be turns. A track that has more turns would drastically decrease the speed of the tracks as cars would need to slow down for each turn.
Rr x Rr what percent of the offspring will be round
Answer:
75%
Explanation:
The allele for the dominant round phenotype is represented by R while the allele for recessive wrinkled phenotype is represented by r. In this question, two heterozygous parents are crossed i.e. Rr × Rr.
These parents will produce gametes as follows: R and r. Using these gametes in a punnet square (see attached image), the following offsprings will be produced: RR, Rr, Rr and rr. The RR, Rr, Rr offsprings will have a round phenotype while the rr will have a wrinkled phenotype. This means that 3/4 × 100 = 75% of the offsprings will be round.
There is a history of global temperatures changing, but why is this change different? (1 point)
O The Earth is getting cooler everywhere instead of warmer.
There are more species on the planet this time.
O This shift in temperature is happening more quickly.
O It is not different; this is a regular shift in temperature.
Answer:
1) high water temperatures and water acidity cause coral polyps to expel algae, causing them to turn white in color
2) acidic carbon dioxide dissolves in water, lowering the water's pH
3) the shift in temperature is happening more quickly
4) to protect itself from the sun
5) the biodiversity of the water
Explanation:
should be 100% on the quick check if you put those answers
There are different ranges in temperature. Why is this change different is because this shift in temperature is happening more quickly.
Why are temperature around the world different?There are a lot of factors affecting temperature such has latitude. Most times, the places closer to the Earth's equator are said to be far warmer than those near to the poles.
The recent rise in temperature is said to be due to a new forcing. here, the greenhouse gas emissions from human activity, is said to have driven atmospheric CO2 to its highest level.
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The cell cycle can be divided into two broad stages:
The non-dividing portion, called _________________________
The cell division portion called ______________ & ________________
Answer:
The non-dividing portion is called Interphase.The Cell division portion is called Mitosis and cytokinesis
Explanation:
Answer:
chemical signals from cylins
Explanation:
PLEASE HELP
Colorblindness is a recessive trait that is passed along to human offspring. The
inability to differentiate between or see some colors is controlled by a gene that is
found on the X chromosome. Why are more males affected by colorblindness than
females?
Colorblindness is more often found in males because they have less of a need to
see color
Colorblindness is more often found in males because they receive only one Y
chromosome and therefore men always will have colorblindness because
females do not have a Y chromosome
Colorblindness doesn't occur more often in males it happens equally in both
male and females
Answer:
The answer is the second one.
Explanation:
The answer is the second one because males have one x chromosome and one y chromosome. Females have only two x chromosomes. B makes more sense because males are more likely to have to deal with se-linked siorders because of their lack of x chromosomes.
Does this help?
2. How do adaptations help organisms?
A. It helps the organisms change colors.
B. It improves its ability to survive and reproduce.
C. It improves its ability to change species.
D. It helps the organism become a fossil.
Answer:
B. It improves its ability to survive and reproduce.
Explanation:
Explain why a high ratio of surface area to volume benefits a cell.
Answer:
smaller single celled organisms have a high surface area to volume ratio cause surface area to the volume ratio smaller as the cell grows larger. if a sell grow beyond the limit not enough material will be able to cross the membrane fast enough to accommodate the increased cellular volume
Based on the context clue in the
sentence below, what does
brilliant mean?
The ball was a brilliant blue in
stark contrast to the dull, tan
walls of the racquetball courts.
A. dazzling
B. round
C. stuffy
Answer:
i belive is: A. Dazzling
Answer:
dazzling
Explanation:
when they use brilliant in this context, they are seemingly emphasizing the beauty in the pigment of the ball.
Zachary has watched a documentary on the negative and positive impacts of cloning cells. Which of the
following might have been featured in the documentary as a positive impact that cloning may have on
individuals?
PLEASE HELP ME
Answer: Organ replacement
Explanation:
Name the largest and smallest national park
Answer:
Largest: Wrangell-St. Elias National Park and Preserve, AK, at 13.2 million acres.
Smallest: Thaddeus Kosciuszko National Memorial, PA, at 0.02 acres.
. The nitrogen that exists on Earth was created by nitrogen-fixing bacteria. True or False
Answer:
Verdadero
Explanation:
B cells are responsible for cell mediated immunity.
A. True
B. False
Answer:
True
Explanation:
B cells are involved in the humoral immune response and T cells are involved in the cell-mediated immune response. Class 1 MHC molecules are found on all uncleared cells and class 2 MHC molecules are found on macrophages, B cells, and activated T cells.
PLEASE HELP!! WILL BE MARKED BRAILIEST
10 points for each question
7. reproductive cell containing genetic material from each parent organism, able
to grow into a complete new mold structure
Zygomycota
yeast
zygospore
stolon
8. sexual reproductive structure formed where two hypha of mold contact each
other *
stalk
symbiosis
spores
zygosporangium
Answer:
7-Answer is zygospore
8- Answer is zygosporangium
Explanation:
I hope it's helpful!
what kingdom has some organisms that use sunlight to make food, while others consume other organisms as their food source
Answer: Plant kingdom!
Explanation: Most plants use sunlight to make food with photosynthesis but others, like the Venus fly trap, consume other organisms. Good luck! :D
20 pts!!!
The CRISPR system allows biologists to alter the nucleotide sequence of specific genes. Which of these tasks could theoretically be achieved by applying the CRISPR system instead of other techniques of genetic engineering?
A. transferring a functional gene from one organism to another
B. deactivating a disease-causing gene
C. replacing a defective gene with a normal gene
D. determining whether two DNA samples came from the same source
Answer:
B.
Explanation:
Your welcome
Is the following statement true or false?
Environmental pressures cannot lead to adaptations over time, only mutations can.
True
False
whats the Definition of postsynaptic?
Answer:
Postsynaptic potentials are changes in the membrane potential of the postsynaptic terminal of a chemical synapse. Postsynaptic potentials are graded potentials, and should not be confused with action potentials although their function is to initiate or inhibit action potentials.
I hope it's helpful!
Answer:
occurring after synapsis
Explanation:
of, occurring in, or being a nerve cell by which a wave of excitation is conveyed away from a synapse
PLEASE HELP I NEED THIS FAST PLEASE
In pea plants, tall plants are dominant over short plants. cross a plant that is TT with a plant that is Tt. what percentage of the offspring are Tt?
this makes no sense sombody please tell me how to figure this out.
Answer:
50%
Explanation:
use a punnett square
T TT TT TTt Tt TtTwo of the four possible outcomes are Tt. That means half of them, or 50% are Tt.
I hope this helps
Phillip Gingrich finds an S-shaped bone in this partial skull, a sigmoid process, which is unique to
one particular order of animals in the water today... which one?
Answer:
A primitive whale which he named Pakicetus.
Explanation:
Philip Gingrich is a vertebrate paleontologist at the University of Michigan. He has performed extensive research on whales at the Egyptian desert of Wadi Hitan. His research team member discovered a skull whose braincase was bigger than that of a walnut. Gingerich was able to link the small-brained animal, to an early whale.
The auditory bulla had an s-shaped bony crest known as the sigmoid process and these two features helped whales to hear in water. The case, however lacked other features that helped whales hear beneath the waves. This led Gingrich to the conclusion that the unknown animal was semi-aquatic. This finding also lent credence to the possibility of whales evolving from terrestrial animals.
Its a multiple choice about the food chain with now 3 choices please help
Answer:
a higher than normal population of snakes
Explanation:
I believe this is the correct answer as it is the highest, and it is shown to be rising. it also goes through the rabbit line if that makes any sense, haha. anyways, I hope this helps! :)
☁️☁️☁️☁️☁️☁️☁️
Which property of DNA contributes the most to DNA's ability to
replicate?
A. DNA coils into a long spiral or helix
B. DNA has two complementary strands that can separate
C. Each strand of DNA has a sugar-phosphate backbone
D. Each strand of DNA can be made of a unique sequence of
four different bases
The property of DNA contributes the most to DNA's ability to replicate is DNA has two complementary strands that can separate. Thus, option B is correct.
In how many steps replication occurs?Replication has been occurs in three major steps is the opening of the double helix and separation of the DNA strands, the priming of the template strand, and the assembly of the new DNA segment. During separation, the two strands of the DNA double helix uncoil at a specific location called the origin.
DNA replication has been known the biological process of producing two identical replicas of DNA from one original DNA molecule.DNA replication occurs in all living organisms acting as the most essential part of biological inheritance.
This is essential for cell division during the growth and repair of damaged tissues, while it also ensures that each of the new cells receives its own copy of the DNA. The cell possesses the distinctive property of division, which makes replication of DNA essential.
Therefore, The property of DNA contributes the most to DNA's ability to replicate is DNA has two complementary strands that can separate. Thus, option B is correct.
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List 4 concepts you learned in this unit about waves and explain how each one applies to your life (4 points)
Answer:
amplitude, wavelength, frequency, and speed.
Explanation: Sound is a type of wave that moves through matter and then vibrates our eardrums so we can hear. Light is a special kind of wave that is made up of photons. You can drop a rock into a pond and see waves form in the water. We even use waves (microwaves) to cook our food really fast. Water waves are the focus of our Tsunamis and surf resources, but many other kinds of wave exist. These include sound waves, light waves, radio waves, microwaves and others. All kinds of waves have the same fundamental properties of reflection, refraction, diffraction and interference, and all waves have a wavelength, frequency, speed and amplitude.
Plz answer correct, it for test
A seismogram shows that P waves travel _____.
at the same speed as surface waves
more slowly than S waves
at the same speed as S waves
faster than S waves
Answer: P waves are faster then s waves
HELP PLSSS!!! CROWN WILL BE REWARDED FOR CORRECT ANSWER!!!
Which is NOT a function of the digestive system?
A. protect your body from pathogens by providing a protective cover over your body
B. molecules are absorbed into blood and carried throughout the body
C. break down food molecules the body can use
D. wastes are eliminated
Answer:
Its, A.) protect your body from pathogens by providing a protective cover over your body
1. Which is an example of the force of gravity?
A. A woman pulls open a door.
B. A magnet pulls an item toward it.
C. A student pushes his chair in at his desk.
D. A rolling ball slows down from friction.
Answer:
D
Explanation:
it is felling down I guess