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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.
Which of the following is/are characteristics shared by most animals?
Asexual reproduction
Heterotrophic eukaryotes
All have radial symmetry
All have DNA outside of the nucleus
This is science but there isn’t a science label. I WILL GIVE BRAINLIEST IF YOURE CORRECT.
Which of the following is true about spring tides but is not true about neap tides?
They must occur during a new moon in the spring.
They occur during the moon's first-quarter and third-quarter phases.
They only occur during a full moon.
They can occur twice a month, during a new or full moon.
Answer:
They can occur twice a month, during a new or full moon.
Explanation:
Please mark me brainliest and have a nice day! <3
I need help with this question
Answer:
4 one is 2 2one3
Explanation:
Which is an example of carbon accumulating in the geosphere?
Select one:
Formation of fossil fuels from remains of dead organisms.
Breaking down the body of a dead organism and producing carbon dioxide gas.
Formation of glucose in plants through photosynthesis.
Breaking down glucose in cells through cellular respiration.
Explanation:
it will option A hope it helps
I'm at school and I need help
100points for the answer
male
Explanation:
Females ovary always have a X chromosome.
Males sperms are of two types, they either have X chromosome or Y chromosome.
If X chromosome of males is involved in fission then, it results in XX chromosome set, it results in a female child.
If Y chromosome of males is involved in fission then, it results in XY chromosome set, it results in a male child.
What remind’s you of the ribosomes in a cell???
Plz help due today!!
Answer:
i imagine them as peopel in a big city, or animals in the wild with predators that are hungry, the cell uses the ribosomes for food and to heal the cell with energy.
Explanation:
How did the temperature relate to the “recommended temperature limit” (solid horizontal red line)?
Will give extra points for right answer
Answer:
The “recommended temperature limit” indicates limit of the temperature that is good for our world and above this limit causes adverse affect.
Explanation:
The temperature related to the “recommended temperature limit” means that in the graph there is a limit of temperature for our world's environment. if the temperature is between this limit, there is less or no adverse effect on our environment while on the hand, if the temperature exceeds from this limit, then it adversely affected our world because the concentration of carbondioxide gas in the atmosphere increases due to this increase temperature..
do heterotrophs perform photosynthesis
Answer:
I think the answer would be No my bad of I'm wrong
What 3 types of science formed the geological time scale?
A. Archaeology, paleontology, astrology
B. Scientology, astronomy, geology
C. Geology, archaeology, paleontology
D. Paleontology, Scientology, biology
Answer:
I believe the answer is C.
Explanation:
Please help me with this
What does each letter stand for in Einstein’s equation, E=mc2?
State in words what Einstein’s equation represents.
Explain why Einstein’s equation is so important.
How does Einstein’s equation relate to the energy produced in nuclear reactions?
Answer:
hope this helps, im sorry if it dosent
Explanation:
1-
An equation derived by the twentieth-century physicist Albert Einstein, in which E represents units of energy, m represents units of mass, and c2 is the speed of light squared, or multiplied by itself.
2-
The equation — E = mc2 — means "energy equals mass times the speed of light squared." It shows that energy (E) and mass (m) are interchangeable; they are different forms of the same thing. If the mass is somehow totally converted into energy, it also shows how much energy would reside inside that mass: quite a lot.
3-
Einstein's greatest equation, E = mc2, is a triumph of the power and simplicity of fundamental physics. Matter has an inherent amount of energy to it, mass can be converted (under the right conditions) to pure energy, and energy can be used to create massive objects that did not exist previously
4-
The change in mass is related to the change in energy according to Einstein's equation: ΔE = (Δm)c2. ... The energy corresponding to the mass defect is the nuclear binding energy, the amount of energy released when a nucleus forms from its component particles.
pls help me nowwwwwwww:( plssssssssssss
Answer:
I want to say B. It replicates the DNA
Explanation:
I hope this helps! please tell me if im wrong.
What happens to the pyruvate that enters the Krebs cycle?
A car with a mass of 2000 kg and a boat with a mass of 500 kg are both moving at the same speed.
What is the ratio of the kinetic energy of the car to the kinetic energy of the boat?
A. 2:1
B. 4:1
C. 9:1
D. 16:1
Answer:
B
Explanation:
Kinetic energy is possesed by a body by virtue of its motion. The ratio of the kinetic energy of the car to the boat is 4:1.
What is Kinetic energy?The term kinetic energy refers to the energy that is possesed by a body by virtue of its motion.
Now;
Kinetic energy of the car = 0.5 * 2000 * v^2
Kinetic energy of the boat = 0.5 * 500 * v^2
The ratio of the kinetic energy of the car to that of te boat is; 0.5 * 2000 * v^2/0.5 * 500 * v^2 = 4:1
Learn more about kinetic energy: https://brainly.com/question/365923
Which statement best describe a chromosome?
A. It is a single piece of DNA that contains genes.
O B. It forms the hereditary material of all life on Earth.
OʻC. It is the passing of characteristics from one generation to the next.
O D. It is the part of a chromosome that ties together two chromatids.
Answer: A
Explanation: It most definetly not B, becuase not every form of life has DNA. A chromosome is a single chain of DNA that is coiled and super coiled to form dense thread-like pieces. The term chromosome is derived from the Greek words "chroma" or color and "some" or body and is so named because chromosomes have the ability to be stained with dyes.
DNA's shape is similar to what basic structure?
Answer:
a helix!
Explanation:
you can also call it a double helix
what do geologist study
Answer:
The Earth and it's geography
Explanation:
Answer Geologist Study fossils and rocks and other minerals of the earth
Explanation:
I just know since one of my friends is one
What does this mean about the relationship between an
allele’s frequency and its likelihood of being dominant?
During which stage of interphase does the cell grow to nearly its full size? (3 points)
First gap
Second gap
Prophase
Synthesis
Answer:
I'm pretty sure it's synthesis.
Explanation:
Trying to remember. I'm pretty sure though.
why is it important to consider all three levels of biodiversity rather than just one
Answer:
Biodiversity boosts ecosystem productivity where each species, no matter how small, all have an important role to play. For example, A larger number of plant species means a greater variety of crops. Greater species diversity ensures natural sustainability for all life forms.
Explanation:
Answer:
It is important to consider all three levels of biodiversity rather than just one because:
Explanation:
It is important to consider all three levels of biodiversity rather than just one because Biodiversity improves the productivity of habitats where each species, no matter how limited, has an essential role to play. For ex. a greater number of plant species means a greater range of crops. Greater species diversity assures the ecological survival of all life forms.
What is template and what is complementary strand? Please help me need ASAP
Answer:
The term template strand refers to the sequence of DNA that is copied during the synthesis of mRNA. ... The upper strand of DNA is the "mRNA-like" strand. The lower strand is the strand that is complementary to the mRNA.
Explanation:
5. How might an effective vaccine given to a large percentage of the population during a
pandemic change the pandemic's outcome? Support your claim(s) using evidence from Table 1
A salt solution turning cold as the salt dissolves *
A. Change in color
B. Temperature change
C. Light production
Answer:
I'm not sure but I think it's B
Name the type of mutation below:
Orignial DNA: AATCCGC
Mutation DNA: AACCCGC
please help
Answer:
Deletion
Explanation:
The T was removed.
Does anyone have the answers to this lab, PLEASE HELP
A cross between 2 phenotypically 'wild-type' individuals produces 9 wild type offspring for every 3 of one mutant phenotype and 4 of another mutant phenotype. What is the likeliest explanation for this?
Answer:
Recessive epistasis Interaction
Explanation:
Due to technical problems, you will find the complete explanation in the attached files
Select the correct image. Which cell is the most specialized?
Answer:
no pics
Explanation:
Answer:
Where is the image?
Explanation:
A gene consists of which of the following?
1) A sequence of amino acids that create a specific protein.
2) A sequence of tRNA that brings the correct amino acid to the ribosome.
3) A sequence of bases of mRNA that code for a specific protein.
4) A sequence of bases on DNA that code for a specific protein.
Answer:
answer is part (4)
Explanation:
A sequence of bases on DNA that code for a specific protein
4) A sequence of bases on DNA that code for a specific protein.
Gene:A gene is the basic physical and functional unit of heredity.Genes are made up of DNA. Some genes act as instructions to make molecules called proteins. However, many genes do not code for proteins. Alleles are forms of the same gene with small differences in their sequence of DNA bases.Every person has two copies of each gene, one inherited from each parent.Thus, option 4 is correct.
Learn more:
brainly.com/question/25784376
(Don't answer unless u want a ant in ur hair) Why do we need school?
Answer:who knows
Explanation:
Answer:
So that we can learn and get a job which gives us money then with that money we can see each other and I can get all the cuddles I want lol I’m never gonna let you hang out with your friends mwahahaha >:3
Explanation:
