What is the main function of the cell membrane of a cell?
A. to exchange nutrients and the cells waste with the external environment
B. to limit the size that cell can reach
C. To organize the cell's internal contents
D. to protect the cell from harmful substances in the environment
Answer:
D. to protect the cell from harmful substances in the environment
Explanation:
Cell membrane is also known as plasma membrane is a biological membrane that differentiate the internal organelles of the cells from the outside environment. Cell membrane is made up of phospholipid bilayer with embedded proteins.
The main or primary function of cell membrane is to protect cell from harmful substances in the environment as it is the outer convering of the cell. cell membrane regulates movement of substances in and out of cells which restricts entry of harmful substances and hence called as selectively permeable membrane.
Hence, the correct option is D.
4. What are the first organisms (colonizers) on the land? *
O
Flowers
Ants
Lichens & mosses
O
Oaktree
Submit
Answer:
mosses & lichens ......
Which of following are natural factors that can cause extinctions?
I. climate change
II. asteroid impacts
III. volcanic eruptions
IV. changes in oxygen levels in seawater
A.
I, II, III, and IV
B.
I, II, and III only
C.
II and III only
D.
I and IV only
i need help asap
Answer:
A is the answer. so it's correct
do capillaries transport blood from arteries to veins?
Answer:
Capillaries connect the arteries to the veins. The arteries deliver oxygen rich blood to the capillaries, where the exchange for oxygen and carbon dioxide occurs.
Explanation:
Hope this helps!
The high temperature on Friday was 8 degrees above zero. The low temperature was 3 degrees below zero. Which expression gives the average of the low and high temperatures?
a
Left-bracket negative 3 + (negative 8) right-bracket divided by (2) Right-bracket
b
(negative 3 + 8) divided by 2
c
(negative 3 + 8) divided by (negative 2)
d
Negative (3 + 8) divided by 2
Answer:
B
Explanation:
The negative goes by the 3 because it is 3 degrees below zero. To find averages, you add the numbers and divide by how many numbers there are. in this case, it would be (-3+8)/2
Select the living organisms that will decrease as a result of the loss of coral in the food web.
Answer:
Butterfly fish, Triggerfish, parrotfish, and sharks
Explanation: Because the first three fish listed feed on coral, their populations will decrease if coral is eliminated because that means there will be less food to go around for the populations to consume. Many will die out. If those fish die, there will be less of them for the sharks to eat, causing the shark population to decrease as well.
The image shows barrels containing toxic waste that were dumped into a body of water. What is the likely effect of the dumping on this ecosystem?
Answer:
animals can die that are in the ocean
Explanation:
like the turtles (sksksks)
Answer:
the biodiversity of the ecosystem will decrease because the water is getting polluted
Explanation:
in The US- Which states had the clearest skies
Answer:
North Carolina, Maine, Texas, Georgia, Virginia
Explanation:
Um i visited those places and i made sure?
What is the most common element found in the composition of minerals?
Answer: Water
Explanation:
Water I think
A species has homologous chromosomes. What does this say about the species?
A. It has alleles that control certain traits
B. It has pairs of matching chromosomes
C. Its a eukaryote and a haploid species
D. It has DNA that is made of of genes
Can you help me on these?
Answer:
I only know the second one. Its Protista
Explanation:
Protist are like those teenagers that are trying to find themselves. They don't know what they want to be. They are producers and consumers.
i think this is pretty easy so fill in the blanks and i’ll give you 15 points
Answer:
producers, energy, carbon dioxide, oxygen
A company has several factories around the world and has decided to transition from burning fossil fuels to using alternative energy resources. How could a decrease in burning fossil fuels impact the atmosphere?
A It could decrease the oxygen levels of the atmosphere
B it could increase the nitrogen levels
C it could decrease the carbon dioxide levels
D it could increase the sulfur dioxide levels
Answer:
C. It could decrease the carbon dioxide levels of the atmosphere
Explanation:
This is 100% right
Give brainlest please
Why is the nitrogen cycle important for the survival of organisms in an ecosystem? A. The nitrogen cycle recycles nitrogen through an ecosystem, making it available to all organisms. B. The nitrogen cycle keeps organisms from consuming nitrogen in their ecosystem. C. The nitrogen cycle allows all organisms in an ecosystem to consume nitrogen instead of consuming each other. D. The nitrogen cycle stores nitrogen in safe places, keeping it from entering an ecosystem.
Answer: A.) The nitrogen cycle recycles nitrogen through an ecosystem, making it available to all organisms.
Explanation: Nitrogen is an essential nutrient for plants and a significant component of proteins, which all animals need to grow, reproduce and survive. The nitrogen cycle converts nitrogen into compounds that plants and animals can use.
33 indica si las siguientes frases son verdaderas o falsas y corrige las falsa A) la competencia es una relación exclusivamente interespecífica B )los parásitos pueden matar al huésped C ) las poblaciones gregarias son aquellas en las que existe una jerarquía entre los individuos D) en las poblaciones coloniales individuos de distintas especies crecen unidos entre sí E) En las relaciones de mutualismo y comensalismo una de las especies resulta indiferente a la relación F) La cooperación entre individuos beneficia tanto a estos como a la población G) La simbiosis es una relación beneficiosa para ambas especies
The answers to these question are the following:
A) False
B) True
C) False
D) False
E) False
F) Flase
G) True
Explanation:
A) Competency can also be intraspecific
B) Parasites often cause the death of their hosts
C) There are gregarious organisms whose populations have no defined hierarchies
D) Colonial populations may be formed by organisms from the same species
E) Mutualism is a beneficial association for both species
F) Not necessarily, there are cases where this type of association only benefits to individuals
F) Symbiosis is the association among organisms from different species that benefits both species
Make a Punnett Square for a cross between a homozygous dominant and a hybrid pea plant. Use C for dominant traits and c for recessive traits. Place the homozygous pea plant across the top.
Okay so i need more information, but the top should be both dominant (C C), while the side is one dominant, one recessive (C c). So the bottom two squares of the punnett square, are both one dominant, one recessive (C c) and the top two are both dominant (C C) Not entirely sure what you're asking.
Answer:
a0=CC a1=CC a4=Cc a7=Cc a5=Cc a6=Cc a2=CC a3=CC
Explanation:
Leslie argues that an organism called a Euglena is a plant because it is eukaryotic, has a nucleus, makes its own food, and is unicellular.
Where is Leslie’s error?
Plants do not make their own food.
Plants are multicellular.
Plants are prokaryotic.
Plants do not have a nucleus.
Answer:
B. Plants are multicellular.
Explanation:
In ecology, what is meant by the term "community"?
Answer:
A community is a ecosystem without the abiotic features such as lakes, rocks and the sun. It consists of only populations of species.
Answer:
In ecology, a community is a group or association of populations of two or more different species occupying the same geographical area at the same time, also known as a biosynthesis.
Explanation:
5
What might you find inside a vaccine?
WHO CAN HELP ME WITH MY HOMEWORK ILL GIVE 50 POINTS AND BRAINIEST :COMMENT ME IF U WANNA HELP
Answer:
yooo i gonna help
Explanation:
Answer:
Slatt.
Explanation:
Thanks For The Points Slime.
Which best describes genetic mutations?
A. Some inherited genetic mutations can be good for the offspring.
B. Different genetic mutations cause few forms of cancer.
C. Somatic mutations can be inherited from parents or acquired during life.
D.Genetic mutations that cause diseases are always passed on to offspring.
Answer:
A genetic mutation is a random change in the DNA that is passed on further generations of cells and or organisms. Genetic mutations are accidental changes in the DNA in the germ cells or early in the formation of the embryo.
Explanation:
Some inherited genetic mutations can be good for the offspring.
What is mutation?"It is a change in the structure of a gene."Gene is a structural and functional unit of hereditary.It is caused due to addition, deletion or copying of single base pairs of DNA.The mutation that occurs in somatic cells (cell other than stem cells or s ex cells) are not transferred from parent to offspring.A mutation should occur in s ex cell, in order for it to pass down to the offspring. So, the mutation that cause disease if occurs in somatic cell will not be passed to the offspring.The mutation can sometime result in the production of new proteins that are beneficial in nature.Not all the genetic mutation can cause cancer.Hence, the correct option is A. Some inherited genetic mutations can be good for the offspring.
To know more about genetic mutation here
https://brainly.com/question/368851
#SPJ2
The wolves, small in number, transformed, not just the ecosystem of Yellowstone National Park but also its physical geography." What is the best description of the term “physical geography?”
aThe way in which living things interact with each other
bThe way in which living things and non-living things interact with each other
cThe number of humans within an area
dThe natural features and processes within an area
Why does the amount of energy DECREASE as you move up the pyramid?
It is absorbed by the sun
It is lost as heat
The animal vomits part of it's food
Answer:
It is the second option. Lost as heat.
Answer:lost at heat
Explanation:
Ella holds an ice cream cone in her hand. She soon notices that her hand begins to feel cold. What is different about the particles that make up her hand?
Group of answer choices
Answer:
They are now cold
Explanation:
Lol
What are the possible anticodons in the tRNA molecules that carry serine to the ribosome?
Population distribution in Europe and Russia is most impacted by
A government restrictions
B. cultural differences
C. natural resources
D. climate
Please select the best answer from the choices provided
OA
OB
0
00
0
Mark this and return
Save and Exit
Answer:
i think right answer is climate.
During photosynthesis blank energy is converted into blank energy
Answer:During photosynthesis solar energy is converted into chemical energy
Explanation:
The cardiovascular system includes all of the following EXCEPT?
A.
Veins
B.
Arteries
C.
Capillaries
D.
Neurons
Answer:
D
Explanation:
The cardiovascular system does not include Neurons (D). The cardiovascular system is also known as the circulatory system..i think :/
Hope this helps, if it doesn't please let me know :)
Answer:
D, Neurons
Explanation:
cardiovascluar sysetm does not include neurons as neurons are molecules.
What use proteins to diffuse materials across the cell membrane?
Facilitated diffusion
Answer:
Facilitated diffusion
Which of these are long strands of DNA?
A. Chromosomes
B. Fossils
C. Genes
D. Mutations
Answer:
Chromosomes
Explanation:
