When looking through a miscrcope you see a single celled organism. You don't see any nucleus on this organism, this organism is most likely
an Eukaryote.
True or false?
Answer:
True
Explanation:
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SENIOR THREE BIOLOGY CHRISTMAS DOSAGE
1.(a) (i) Explain why small organisms such as this amoeba can obtain sufficient oxygen for respiration without a
specialized gas-exchange system.?
fi)explain why the method of gas exchange in (a)i above is only possible in very small organisms.?
Answer:
In single celled organisms surface area to volume ratio is optimum for diffusion/exchange of substances between the cell and its exterior and this rate of exchange suffices the requirement of a unicellular organism. However, in multicellular organisms the surface area to volume ratio is low, the exchange that takes place with the exterior or the environment occurs only through the body surface with the help of a specific structure/organ, example (Skin),However, this exchange does not compensate for millions of cells in a multicellular organism, which have distinct requirements based on their function
Explanation:
i) Amoeba gets oxygen gas dissolved in surrounding water through its plasma membrane by the process of diffusion.
ii)The oxygen gas diffused inside the body is used up by amoeba. carbon dioxide gas is also liberated in the surrounding water through the same process of diffusion.
The picture represents muscle tissue.
Which type of muscle tissue is pictured?
Answer:
Smooth muscles
Explanation:
Which choice describes a strategy used to help restore cod populations?
limit the size of fishing fleets and catches
restrict fishing to trawling nets
allow fishermen to harvest from protected areas when necessary
harvest only very young fish
Answer: Limit the size of fishing fleets and catch size.
Explanation: Cod are nearly extinct therefore we either need to stop catching them or limit the amount you catch
The choice describes a strategy used to help restore cod populations is limiting the size of fishing fleets and catches. The correct option is A.
What are cod populations?Atlantic cod, a fish that was essential to New England's economy, is being fished at historically low levels, and New England cod appears to be recovering from overfishing after many years.
Many people are concerned about eating fish because the IUCN has recently classified species including cod, haddock, and grouper as endangered. The fish that are linked to high bycatch rates are another worry for divers. Animals like dolphins and turtles are accidentally killed in the nets at this location.
Therefore, the correct option is A. limit the size of fishing fleets and catches.
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Each of the following can kill pathogens in the body, except:
A Vaccines
B Antibodies
C Leukocytes
D Antibiotics
Answer:
A. Vaccines
Explanation:
These are meant to prepare the body for the possibility of infection by building up immunity.
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The best determination of a community’s quality of life is _______.
How might an animal species be different in various habitats
Answer:
they adapted to their climate
Explanation:
Answer:
hey adapted to their climate
Explanation:
Above
Please help me I really need help I am having a hard time with this question.
Answer:
I would prefer to have city water because you don't have to worry about it getting polluted unlike well water. The city water is maintained by the city while with the well water, you maintain it yourself. Even though it can be pricey, most people live in the city anyway, so there is easier access to it.
Explanation:
Answer:
Well Water
Explanation:
I would prefer well water, because city water had a lot of chemicals, and city water filters out minerals that are good for the body. Also, well water tastes ten times fresher than city water. Also, well water is easy to obtain if you already have a well, all you have to do is wither pump it up, or use a basket to scoop some out.
PLEASE HELP ASAP WILL RANK BRAINLIEST!!!!
Answer:
C
Explanation:
The rise in the lines mean that the enzymes still work properly at different rates, but the peaks represent the temperatures and ph they work best at
PLEASE DO NOT COPY OFF ANY WEBSITES ANSWER IN YOUR OWN WORDS
Why have organisms evolved to have vestigial body parts?
Answer:
Structures that have lost their use through evolution are called vestigial structures. They provide evidence for evolution because they suggest that an organism changed from using the structure to not using the structure, or using it for a different purpose..
Hope it will help :)
Explanation:
Name two types of pathways that help a body maintain homeostasis, and an example of each.
Answer:
Explanation:
The cardiovascular and lymphatic systems transport fluids throughout the body and help sense both solute and water levels and regulate pressure. If the water level gets too high, the urinary system produces more dilute urine (urine with a higher water content) to help eliminate the excess water.
Answer:
The receptor and afferent pathway are pathways that help the body stay n homeostasis. An example of the receptor is like temperatures in your skin. An example of Afferent pathways are sensory neutrons.
Explanation:
which type of reproduction produces offspring with more genetic variation?
Answer: Sexual reproduction!
Explanation: hope i helped! <3
Answer:
Sexual repduction provides genetic diversity
EXPLANATION:
because the sperm and egg that are produced contain different combination of than the parant organisation.
please I need help !
Answer:
I think D.) More cobs on plants
Explanation:
If it ain D then it's C
How is it that all cells have the same DNA, but there can be many different types of cells?
Answer:
each cell deploys its genome and play different role
Explanation:
help help pls will mark brainliest if i can
brain-nucleus
skin- cell membrane
stomach- mitochondria
blood- cytoplasm
What does this mean about the relationship between an
allele’s frequency and its likelihood of being dominant?
Which statement below best describes the role of DNA?
A. It serves as the memory molecule in brain cells
B. It's the main supplier of energy for cells
C. It is used to store energy in the body
D. It carries the information for building proteins
Answer:
D , option is correct answer hope it helps
Explanation:
d is the correct answer, hope this helps you
Can anyone help me please I need this in a few mins
When measuring the brightness of a star, what is a limitation of using apparent magnitude rather than absolute brightness?
Apparent magnitude does not use the star's color or temperature.
Apparent magnitude is only theoretical, thus its value cannot be directly measured with equipment.
Apparent magnitude does not take into account the fact that not all stars are the same distance from Earth.
Apparent magnitude is only on a comparative scale that determines how bright a star looks from a theoretical distance of 32 light-years from Earth.
Answer:
D. Apparent magnitude is only on a comparative scale that determines how bright a star looks from a theoretical distance of 32 light-years from Earth.
Explanation:
I majored in Biology
Answer:
Yea what the first guy said.
Explanation:
Which chemical is a compound ?
A. Hydrogen
B. Helium
C. Nitrogen
D. Hydrochloric acid
Answer:
It is D
Explanation:
All A,B, and C are a element so D.
What is the relationship between changing co2 concentration and temperature?
Answer:
When the carbon dioxide concentration goes up, temperature goes up. When the carbon dioxide concentration goes down, temperature goes down.
Explanation:
PLEASE HELP
How are isobars used by meteorologists?
Answer:
Isobars are lines of constant or equal pressure on a weather map. They can be used to find areas of low or high pressure over a broad area (like the U.S.), and they can tell us how intense the system may be.
Explanation:
HELP PLEASE WILL GIVE POINTS FOR VOLCANOS DRAG AND DROP USE ATTACHMENT PLEASE
Answer:fissure (g) evacuate (b) magma (c) lava (h)
Explanation:
Why is DNA locked in the nucleus of the cell ?
Answer:
Inside the nucleus lies the blueprint that dictates everything a cell will do and all of the products it will make. This information is stored within DNA. The nucleus sends “commands” to the cell via molecular messengers that translate the information from DNA.
Explanation:
identify 3 conditions that can develop from having or missing chromosomes
Answer:
1. Down Syndrome - Caused by an extra copy of chromosome 21
2. Klinefelter Syndrome - Boys with extra x chromosome(s)
3. Turner Syndrome - Girls lacking a second x chromosome
What is the effect of photosynthesis in the carbon cycle?
Select one:
It adds carbons to the atmosphere in the form of carbon dioxide.
It removes carbon from the atmosphere and stores it as water.
It removes carbon from the atmosphere and stores it as glucose.
It adds carbon to the atmosphere in the form of glucose.
URGENT!
Answer:
option C is correct answer of this question
In What phase of meiosis does Chromosomal reduction occur?
Identify three ways in which water is stored.
Which organisms are affected most by biological magnification?
Answer:
This is biomagnification, and it means that higher-level predators-fish, birds, and marine mammals-build up greater and more dangerous amounts of toxic materials than animals lower on the food chain. In this activity you will explore the biomaginification of toxic chemical, mercury, through a simple marine food chain.
Explanation:
Which of the following is a compressional/longitudinal wave?
А
water
B
fans doing the "wave" in a football stadium
С
light
D
sound
Answer:
D. Sound
Explanation:
Both А. water and B. fans doing the "wave" in a football stadium are both literal waves and are not examples of a compressional/longitudinal
Answer:
the answer is sound
Explanation:
a sound wave in longitudinal
Pepsin is an enzyme produced in the stomach. Pepsin has an optimum pH that is very acidic, between a pH of 1.0 and 2.0. In an
experiment involving the enzyme pepsin, the pH is raised from 2 to 11. What will be the MOST LIKELY effect of this on the reaction?
Explanation:
the pepsin enzyme will not be able to work in a basic medium when ph raised from 2 to 11 it's efficiency will be affected and will not be in a condition of digesting protein .
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hope this will be helpful to you .
When the pH is raised from 2 to 11 the most likely effect on the reaction is ;
The rate of reaction will decrease/delayed
Given that Pepsin enzyme has an optimum pH of 1.0 to 2.0, it will perform efficiently as a catalyst in an experiment whose pH levels fall within the range of the optimum pH of Pepsin.
Pepsin enzyme accelerates the digestion of proteins therefore when the pH levels are raised above 2.0 the efficiency of Pepsin enzyme will be negatively affected and the digestion of protein will require a higher activation energy.
Hence we can conclude that When the pH is raised from 2 to 11 the most likely effect on the reaction is The rate of reaction will decrease/delayed.
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