all eukaryotic cells have mitochondria but only plants and some photosynthesis process of chloroplast? what can be inferred?
determine why cycles in the biosphere are called biogeochemical cycles
In ecology and Earth science, a biogeochemical cycle or substance turnover or cycling of substances is a pathway by which a chemical substance moves through biotic (biosphere) and abiotic (lithosphere, atmosphere, and hydrosphere) compartments of Earth.
They are called biogeochemical cycles because chemical substances are cycled through the geosphere and these cycles often involve living organisms.
Matter moves round the ecosystem in certain cycles. The cycles in nature are; water cycle, nitrogen cycle, oxygen cycle, phosphorus cycle, carbon cycle, etc.
Many of these cycles involves living organisms. The substances that are being cycled are chemical substances and the geosphere is involved in all these cycles.
As a result of all these, the cycles in nature are called biogeochemical cycles.
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what are the two major types of cells found on earth
Which protein serves as a chemical messenger
ways to organize data
What are the answers for 21 and 22
you take a summer vacation by the ocean in P.E.I. You love the ocean plants you see and decide to bring some home for your fish tank. After a week or two, you notice your plants are not thriving in your freshwater tank.
How many orbital blocks are represented in the periodic table?
Answer:
4
Explanation:
edge 2021
if you found piophila casei and bone eating beetles on a body, what could you say about the time of death
The presence of Piophila casei and bone-eating beetles on a body could indicate a post-mortem interval of several days to weeks, as these are species associated with later stages of decomposition. By examining the specific insect species and their stages of development, forensic entomologists can more accurately estimate the time of death.
If one found Piophila casei (cheese skipper flies) and bone-eating beetles on a body, it could suggest a specific timeframe since the individual's time of death. Piophila casei is known to be involved in the latter stages of decomposition, and the presence of bone-eating beetles, which tends to indicate a period of weeks into the decomposition process, can help to narrow down the timeline even further. Forensic entomology is the field that studies how insects can help in determining the post-mortem interval (PMI), which is the time elapsed since a person has died.
Flies, such as those in the Calliphoridae family, are usually the first to arrive at a decomposing carcass and lay eggs, often within minutes or hours after death. Over time, these eggs hatch into larvae and grow at a steady pace, and the development stage of these larvae can provide a minimum PMI. Beetles, with their longer life cycles, can cross-validate this evidence and expand the time frame to span over several weeks of decomposition.
The ecological succession of insects on a carcass starts with initial colonizers like blow flies and progresses through a predictable sequence that includes various beetle families. Over time, the body will attract different insect species according to the stage of decomposition, which is known to forensic scientists as 'ecological succession'. By analyzing this succession and the specific stages of insect development, a more accurate estimation of the time of death can be achieved.
I WILL GIVE 20 POINTS!!! Multicellular organisms have five levels of organization ranging from simplest to most complex. The simplest level is the cellular level. You are the most complex level: you are an organism. List the five levels of organization, from simplest to most complex. Describe each level with one or two sentences. Give an example at each level.
Draw Conclusions Why is it important for a doctor to ask a patient questions in addition to doing a physical exam
Choose all the answers that apply.
Sound _____.
travels in longitudinal waves
can travel through a vacuum
travels most slowly through a gas
speeds up when temperature is increased
is caused by vibration
Answer: your answers are A,D,And E
Explanation:
What best explains the relationship between structure and function of the cell membrane? (2 points)
The single layer membrane surrounding the outside of the cell allows for the easy removal of waste.
The lipids and proteins that make up the membrane allow it to be selective about what enters and leaves the cell.
The fluid inside the membrane buffers the chemical reactions taking place inside the cell.
The lipids forming the membrane provide energy for protein synthesis.
Answer:
The lipids and proteins that make up the membrane allow it to be selective about what enters and leaves the cell.
Explanation:
The cell membrane is double membranous which is a phospholipid bilayer. It is selectively permeable to only few substances because of the presence of lipids and integral proteins present in it. While lipid bilayer allows direct entry of only fat soluble substances like steroid hormones, fat soluble vitamins etc., the integral/embedded proteins present in the bilayer in the form of receptors, channels and pumps allow the entry of nutrients, ions, wastes etc. But, entry of some substances like water, glucose etc. hardly pass through the cell membrane.
in what way can runoff be a problem
Excessive runoff can be problematic as it can lead to soil erosion, water pollution, and flooding. It can carry pollutants from farmland and urban areas into water bodies, damaging aquatic ecosystems and causing health problems for humans. Also, it can cause flooding and damage properties and endanger lives.
Explanation:Runoff, particularly when it becomes excessive, can cause several problems. For instance, it can lead to soil erosion, which degrades arable land, reducing its agricultural productivity.
Runoff can also carry pollutants (like pesticides and fertilizers from farmland and waste materials in cities) which end up contaminating water bodies such as rivers, streams, and eventually, oceans. This phenomenon, known as water pollution, can have detrimental effects on aquatic ecosystems and human health.
Additionally, excessive runoff can cause flooding, a serious risk to both property and lives in areas prone to this kind of event.
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What is an example of the negative effect of fossil fuels?
Fossil fuels cannot be used to heat homes
Fossil fuels have no negative effects
Fossil fuels cannot be used by everyone in the world.
Fossil fuels produce air pollution
Final answer:
Fossil fuels contribute to air pollution and global warming, detrimental to both human health and the environment. They also present risks during extraction and transportation, often leading to environmental disasters. Societal reliance on fossil fuels poses economic vulnerabilities and a lack of preparedness for a future with finite resources.
Explanation:
An example of the negative effect of fossil fuels is that their combustion leads to air pollution. The use of fossil fuels releases various pollutants that contribute to respiratory and cardiovascular problems in humans. Moreover, ecosystems are adversely affected worldwide, causing issues like acid rain, ozone depletion, and, significantly, global warming due to the greenhouse effect from increased levels of carbon dioxide. The climate change that results is driven by CO2 emissions, an unavoidable byproduct of burning fossil fuels. Additionally, the extraction of fossil fuels can be harmful to the environment, causing habitat destruction and water contamination, including significant incidents like the Deepwater Horizon oil spill.
On a societal scale, reliance on fossil fuels creates a vulnerability for economies, especially for countries without their own reserves or when faced with the prospect of depleting resources. Furthermore, the dependence on fossil fuels has led to a lack of planning for a post-fossil world, leaving us unprepared for a future where these resources are no longer available or affordable.
Populations of host organisms are most likely parasitized when _____.
A. they are overcrowded
B. they cannot escape
C. they are diseased
D. they have little to eat
Answer: A. they are overcrowded
A limiting factor is the factor which affects the growth, abundance and distribution of population of species in the living environment. It is of two types: density dependent factor and density independent factor. The density dependent limiting factor results in the change of the per capita population of the living species, with the increase in the density of the population of species. Density independent limiting factor affects per capita population of the living species, irrespective of the density of the population.
Parasitism is a phenomena in which one organism feeds over the body of other to meet it's food, energy requirements and to grow in numbers. Parasitism is a density dependent limiting factor because more denser the population more profound will be the effect of parasitism. As, parasites will get more number of hosts to acquire their food, and the infection will be transferred easily among large number of individuals in the population.
Hence, overcrowded population of host organisms is most likely to be parasitized.
If the same index fossils are found in two separate rock layers, the two rock layers most likely
Answer:
The answer is C. Were formed at the same time.
Explanation:
Which of these units would be MOST useful for describing the speed of someone riding a bicycle?
A. cm/h
B. km/h
C. mm/s
D. cm/min
(02.04 HC)As the climate changes, the average ocean temperature is rising. Using this information, predict what will most likely happen to El Niño events in the future.
El Niño events will intensify because they rely on warmer water sinking to the seafloor.
El Niño events will intensify because they will build on the already warm waters at the equator.
Some El Niño events will be stronger, but most will be weaker because the ocean currents are unpredictable.
El Niño events will become more similar to La Niña events and establish a new weather pattern.
Answer:
El Niño events will intensify because they will build on the already warm waters at the equator. Because the storms that drench the South, Central, and North America form fro, the equator and el niño's warm surface water. But leave the other coutries neglected and waterless.
Surface water, not water that travels to shallower depths.
Why do scientists study index fossils?
Final answer:
Index fossils are crucial for determining the geological age of rock layers and are used by paleontologists for biostratigraphic correlation and understanding evolutionary history.
Explanation:
Scientists study index fossils because they are indicative of specific intervals in geologic time. These fossils, because of their widespread distribution and short lived existence in the geological record, provide key information about the age of the rock layers in which they are found. For instance, Belemnites are cephalopods that lived during the Mesozoic era, and finding a Belemnite fossil can immediately suggest that the surrounding rocks are from the same era. Furthermore, the study of index fossils aids in the field of biostratigraphy, which allows paleontologists to correlate rock layers from different locations and understand the evolution of life through geologic time.
6 Which of the following word pairs correctly completes the sentence below? Mechanical waves travel faster through _______ than through _______. A. solids, liquids B. air, liquids C. liquids, solids D. a vacuum, air
Answer:
Solids
Liquids
Explanation:
A mechanical wave is a type of wave that needs a medium to propagate or transfer its energy to.
An example of a mechanical wave is a sound wave.
Sound waves are not capable of going through vacuum.
Mechanical waves travel faster through solids than liquids because they move with the oscillations of the particles they go through and solid particles are denser and have stronger bonding forces, the mechanical waves pass through quicker than liquids that have weaker bonding forces.
Some cells produce and secrete high levels of digestive proteins. Which organelles would you expect to be abundant in those cells and why?
Final answer:
Cells that produce and secrete digestive proteins have an abundance of Golgi apparatus and rough endoplasmic reticulum, which are involved in the synthesis, processing, and secretion of proteins.
Explanation:
Cells that produce and secrete high levels of digestive proteins are expected to have an abundance of certain organelles that facilitate this process. Specifically, Golgi apparatus (GA) and rough endoplasmic reticulum (RER) are highly abundant in such cells. The RER is involved in the synthesis and modification of proteins. After synthesis, these proteins are transported to the GA, where they are further processed, sorted, and packaged into secretory vesicles. These vesicles are then transported to the cell surface and release their contents, such as digestive enzymes, via the process of exocytosis. This efficient cellular machinery is evident in cells like exocrine cells of the pancreas or cells of the salivary glands.
if a sample of dna contains 36% thymine, how much guanine would you find?
All of the following are true facts about enzymes EXCEPT
A)all living cells have enzymes.B)life would not be possible without enzymes.C)enzymes can speed chemical reactions by 100s to billions of times.D)there are a few types of enzymes, but they each perform many types of reactions.
Which of the following is a solution? A. ocean water B. sand in water C. oil in water D. all of these
Answer:
the correct answer is a , OCEAN WATER !
Explanation:
soultions :-
mixture(homogenous) of two or more substances.components :-
solvent solutetype of soultions
saturated unsaturated supersaturatedexamples of soultion
salt in waterWhy is the Golgi apparatus in the cell?
Which part of photosynthesis is affected by excluding co2 from the plants environment?
Answer: Plants would not be able to synthesize glucose.
Explanation:
The photosynthesis requires carbon dioxide, water in the presence of sunlight to converted into glucose and release oxygen into the environment.
The If carbon dioxide would not be available during this process then the glucose would not be synthesized.
If there will be no glucose in the plants then the plants would die without food. The other organism would also die because the plant provide food to them.
what is the meaning of cell
how much of a cell’s life is taken up by MITOSIS based on your data? 100=(16/36)*100
The total number of mitotic divisions in the formation of 64 daughter cells is A. 6. Therefore, A. 6 is correct .
To find the total number of mitotic divisions required to form 64 daughter cells, we need to consider the process of mitosis, which involves a single parent cell dividing into two daughter cells.
Each round of mitosis doubles the number of cells.
Starting with one parent cell, after the first round of mitosis, there will be 2 daughter cells.
After the second round, there will be 4 daughter cells. After the third round, there will be 8 daughter cells. This pattern continues, doubling with each round of mitosis:
1st round: 2 cells
2nd round: 4 cells
3rd round: 8 cells
4th round: 16 cells
5th round: 32 cells
6th round: 64 cells
So, it takes 6 rounds of mitotic divisions to produce 64 daughter cells.
Therefore, the correct answer is A. 6.
Each division in mitosis produces two daughter cells, so with each division, the number of cells doubles.
The number of divisions required to reach a certain number of cells can be found by determining how many times the initial number must be doubled to reach the desired number.
In this case, to go from 1 cell to 64 cells, the initial number (1 cell) must be doubled 6 times (2^6 = 64). Thus, there are 6 mitotic divisions.
Question
What will be the total number of mitotic divisions in the formation of 64 daughter cells?
A. 6
B. 32
C. 63
D. 16
Ovarian follicles cells produce estrogen, which is a steroid. What organelle will be present in abundance so that the follicles cells might perform this function
The steroids are produced by the Smooth endoplasmic reticulum.
The cells, which are involved in the secretion of the steroid molecules have an abundant number of the smooth endoplasmic reticulum, which is abbrevated as SER.
The cells present in the ovary and the testis have a large number of smooth endoplasmic reticulum. The abundant number of smoothe endoplasmic reticulum allow them to produce a large amount of steroid molecule to produce the steroid hormones estrogen and testosterone.
Hence, in this case, the ovarian cells would have a large number of SER.