How many previous mass extinctions do scientists have
evidence for from the fossil record?
what does cell cycle mean
Explanation:
a cell cycle is a series of events that take place in a cell and it grows and it divides a cell speeds most of its time and what is called interface and during this time it grows replicates into chromosomes and prepers for cell division.
here's an example of cell cycle with few exceptions ( for example, red blood cells) all the cells of living things undergo a few cycles the cell cycle is generally divided into two phases interface and mitosis during interface the cell spends most of its time performing the functions that make it unique
and how long does it cycle take usually cells will take between 5 and 6 hours to complete s phase. G2 is shorter lasting only 3 to 4 hours and most cells it's some then interface generally takes between 18 and 20 hours misosis during which the cell makes preparations for the complete cell division only takes about 2 hours
i hope this helps :)
3.) What cellular processes are necessary for cells to perform in order to maintain homeostasis?
Vacuole, respiration, chloroplast and photosynthesis
Photosynthesis, respiration, diffusion, osmosis
respiration, osmosis , diffusion
Chloroplast, respiration, osmosis, diffusion
Answer:
Photosynthesis, respiration, diffusion, osmosis
Explanation:
Homeostasis refers to the ability of an organism to maintain a stable internal state despite changes in external environment. In order to perform this process, some processes are required to be performed by the cell including:
- Photosynthesis, which is the process by which plants synthesize their food, helps the plant supply energy needed by the cell to perform it's function.
- Cellular respiration is the process of synthesizing energy (ATP) by the cell. Energy is needed by the cell for the numerous functions it carries out. Hence, cellular respiration is a homeostatic process.
- Diffusion is the process by which substance move from a region of high conc. to a region of low conc. until there is even distribution. Without diffusion, some materials cannot get into the cell, hence, it is a homeostatic process.
- Osmosis is the movement of water from a region with high water conc. to a region of low water conc. via a permeable membrane. The osmotic process is also a homeostatic one.
DNA molecule segment is: TTACGCAAG
The mutated DNA segment is TTCGCAAG. This is an example of
mutation.
Answer:
substitation
Explanation:
What type of climate is found near the equator?
- dry and cold
- dry and hot
- wet and cold
- wet and hot
The Hardy-Weinberg Principal is that genetic frequencies in a population?
The “Rule of 10” states that as little as ________ % of the energy at any trophic level is transferred to the next trophic level.
If I am a higher trophic level organism, this means that I need to eat MORE / LESS (circle one) food in order to fulfill my energy needs.
The majority of the energy is lost as ________________ through the completion of metabolic processes.
Answer:
1) "Rule of 10" states that as little as 10% of energy is transferred
2) Higher trophic level organisms need to eat MORE food, as energy is lost between trophic levels
3) The majority of the energy is lost as heat
Can someone help me please
help plzzzzz :), i need help
Here are the answers to the three questions on the right side of the page, as for the left, those are your own opinions, remember?
plate tectonics: a theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates which move slowly over the underlying mantle.three different types of late boundaries:Divergent boundaries -- where new crust is generated as the plates pull away from each other. Convergent boundaries -- where crust is destroyed as one plate dives under another. Transform boundaries -- where crust is neither produced nor destroyed as the plates slide horizontally past each other.crustal features formed at plate boundaries: Deep ocean trenches, volcanoes, island arcs, submarine mountain ranges, and fault lines are examples of features that can form along plate tectonic boundaries.hope this helps ^^
I WILL GIVE BRAINLY
In 1998, paleo anthropologist Rick Potts, of the Smithsonian Institution, published an article in The Yearbook of Physical Anthropology, a peer-reviewed journal. The article was titled “Environmental Hypotheses of Hominin Evolution.” In his paper, Potts provided evidence to support his claim that great variations in environmental conditions over time were responsible for the adaptability of humans and the success of our species. Why might this not be the best article to reference?
a) Potts has no authority.
b) Potts was not objective.
c) The article may not reflect current knowledge.
d) The article was not reviewed bu Potts's peers.
Answer:
Potts
Explanation:
Do dogs have like minds like ours? like do they think and stuff and if so are they barks or english? what language do they think in?
9. Which of the following statements describes the data in Figure 1?
a. An increase in sea urchin which of the following statements describe the data in figure 1?
a. an increase in sea urchin biomass is associated with more intense grazing.
b. An increase in sea urchin biomass is associated with greater kelp density.
C. Predation of sea otters by killer whales is associated with greater kelp density.
d. Sea otter abundance was relatively stable from 1972 to 1997.
Answer:
A. an increase in sea urchin biomass is associated with more intense grazing.
If you have 100 grams of a radioactive isotope (the parent) with a half-life of 10 years, how much of the non-radioactive element (the daughter) will be left after 10 years?
The mass of the non-radioactive element (the daughter) that will be left after 10 years will be 25 grams. The correct option is d.
What is a radioactive isotope?Radioactive isotopes and radionuclides are chemical species of the same elements. Half-life is the time in which half of the radioactive element is reduced. It is the time period of the reduction of the initial half of the radioactive element.
Given the total radioactive element is 100 grams
The age is 20 years
The half-life is 10 years
Hence, the number of half-lives, n=20/10= 2
The formula is
N= (1/2)n No
Where, N = concentration of nonradioactive element
No = Concentration of radioactive element
Put the values in the formula
N= (1 / 2) 2 × 100 = 25 grams
Therefore, the correct option is d, 25 grams.
To learn more about radioactive isotopes, refer to the link:
https://brainly.com/question/12687459
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The question is incomplete. Your most probably complete question is given below:
100 grams
75 grams
50 grams
25 grams
12.5 grams
6.25 gram
Thylakoids membranes have special proteins in bedded into the membrane which catalyze the production of ATP from what type of ions
Answer:
From Hydrogen ion.
H+
Explanation:
It's is from hydrogen ion because majoroty of the electrons transport processes take place in the thylakoids membranes in a bid to produced ATP, Hydrogen ion is allow to move through thylakoid space and then backflow through the proteins embedded in the thylakoids membrane called ATP synthase, which produce ATP from ADP in the mitochondrial matrix and chloroplast stroma.
And a population purple flowers are dominant over blue flowers determine which statement below is not correct
Answer:
Option 3 is not correct: "It is more of an advantage to the purple flower... "
Explanation:
Due to technical problems, you will find the complete question, answer, and explanation in the attached files.
If all the macromolecules are made mainly of the elemwnts CHO, how are they different?
Is this cell haploid or diploid? How can you tell?
Answer:
The cell shown in the image is haploid, which can be affirmed by the presence of an odd number of chromosomes.
Explanation:
Haploid cells are those that have a single set of chromosomes, that is, half of the chromosomal charge (n) of an organism. These cells correspond to gametes.
Diploid cells are those with complete chromosomal charge (2n) and correspond to somatic cells.
The cell shown in the image is a haploid cell, since it has only three chromosomes. Because diploid cells contain chromosomes in pairs, even if the haploid cell of that species is odd or pair, diploids will always have an pair number of chromosomes.
The functions of body systems, like the lungs and heart, differ between humans and animals.
True or False
please answer correctly I'm begging you I'm going to fail if I don't get this right. Will give brainiest.
Answer:
1. True
2. True
3. True
4. True
5. False I think because it doesnt look like it is clinging on
6. True
7. False
8. True
9. True
10. True
11. if its asking about what the pH measures: hydroxide. ic ant write it sorry
12. I cant see the picture very well so id say 7 or 8 more times
Please help me out with this
Answer:
B
Explanation:
because it obviously eats more animals and not just a specific
YEAST LAB !13points
1. What gas is slowly filling up the balloons?
2. Would that gas be a product or a reactant?
3. This reaction uses Yeast and Sugar as the reactants but no oxygen. What type of chemical reaction is this?
is endoplasmic reticulum found in a plant cell?
Is endoplasmic reticulum found in an animal cell?
Answer:
It can be found in both animal and plant cells.
Explanation:
The endoplasmic reticulum can either be smooth or rough, and in general its function is to produce proteins for the rest of the cell to function.
Which is one characteristic of polar climates that highland regions do not have? O a treelin cold temperatures O very little precipitation two seasons with temperature differences
plz help. will give Brainliest
Few trees, cold temperatures, and very little precipitation are the characteristics of polar climates.
What is polar climate?A polar climate is a regain where the climate usually has a temperature below freezing and mostly covered with snow. This is because polar climates don't get direct sunlight as compared to other regions. Polar climates are usually dry.
So we can conclude that Few trees, cold temperatures, and very little precipitation are the characteristics of polar climates.
Learn more about polar here: https://brainly.com/question/545359
Answer:
I think the answer is cold temperatures, and very little precipitation
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a process by which organisms create carbohydrates from sunlight, carbon dioxide, and water is called
(a) photosynthesis
(b) biogenesis
(c) chemosynthesis
(d) metamorphosis
Answer:
I belive it is answer A
Explanation:
Photosynthesis is the process in which a plant uses sunlight, carbon dioxide, and water to make itself food aka carbohydrates.
Answer:
A. Photosynthesis
Explanation:
It's the cycle by which plants, algae, and some bacteria create carbohydrates and oxygen from sunlight, carbon dioxide, and water.
All forms of cancer are characterized by -
A an abnormal, unregulated production of cells
B the aggregation of cells into a mass called a tumor
C the spreading of abnormal cells to tissues across the body
D the inhibition of DNA replication in affected cells
Please help asap If you can, explain don't just answer.
Answer:
you didn't attach anything
Explanation:
...
Answer:
Explanation:no attacthment
What role does mutation play in the evolution of an organism?
Answer:
Mutation plays an important role in evolution. The ultimate source of all genetic variation is mutation. Mutation is important as the first step of evolution because it creates a new DNA sequence for a particular gene, creating a new allele.
true or false weight is the measure of gravitational force of an object.
Answer:
true
Explanation:
What is the original source of energy for all life on earth?
Answer:
sun
Explanation:
sun is the main source that plant and animals get that energy from
Which percentage of Earth's oceans is dissolved salts?
Á. 3.5 percent
B. 30.6 percent
C. 55 percent
D. 96.5 percent
Answer:
3.5 percent
Explanation:
Edg 2021 i got it correct
Answer:
A: 3.5 percent
Explanation:
Trust me on this, also can I have brainiest please?
Hope you do well! :D
