Which of the following best matches a part of a living cell with the function it performs?
O Cytoplasm: green structure inside plant cells
O Cell membrane: green structure inside plant cells
Cytoplasm: surrounds a cell and allows substances to pass in and out
O Cell membrane: surrounds a cell and allows substances to pass in and out
Answer:
O Cell membrane: surrounds a cell and allows substances to pass in and out
Explanation:
Cell membrane is also called plasma membrane. Cell membrane is the boundary of the cell which helps in the protection of the cell from external environment. Cell membrane is a semipermeable membrane which has small pores that allows substances such as water, glucose, Sodium ion, oxygen and carbondioxide etc to pass through it.
Answer:
(C.)
Cytoplasm: surrounds a cell and allows substances to pass in and out
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See the photo then answer
Answer:
B
Explanation:
Velocity is the rate of motion, speed or action.
Which of the following combinations would create the fastest chemical reactions?
A.
a whole antacid tablet and vinegar at 25 degrees Celsius
B.
a whole antacid tablet and vinegar at 50 degrees Celsius
C.
a crushed antacid tablet and vinegar at 25 degrees Celsius
D.
a crushed antacid tablet and vinegar at 50 degrees Celsius
The combinations which would create the fastest chemical reactions is a crushed antacid tablet and vinegar at 50 degrees Celsius. Thus, the correct option is D.
What factors affect rate of a chemical reaction?The five factors which can affect the rates of the chemical reactions include the chemical nature of the reacting substances or reactants, the state of subdivision which is one large lump versus many small particles of the reactant molecules, the temperature of the reactant molecules, the concentration of the reactant molecules, and the presence of a catalyst in the chemical reaction.
The combinations which would create the fastest chemical reactions include taking a crushed tablet as a better option than whole tablet because as the surface area of the tablet increases, the rate of reaction increases. Also, as the temperature of the reaction increases, the rate of reaction also increases. So, 50 degrees Celsius temperature is better option than 25 degrees Celsius.
Therefore, the correct option is D.
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2 Points
Which habitat receives the least amount of rain?
O
A. Tropical rain forest
O
B. Grassland
O
C. Desert
O
D. Deciduous forest
Answer:
Desert
Explanation:
if you even just look it up out of all habitats, desert is the option.
Deserts are found commonly near the equator, they are excruciatingly hot in the day, and freezing cold at night. They get little rain due to the heat or cold.
Definitely not rain forest, rain IN THE NAME
Grasslands in the US get rain fairly frequently. The graslands on the savanna have rain seasons too.
Deciduous forest is kind of the average pine and oak forest so rain does occur
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why is homeostasis important to organisms
Answer:
maintaining homeostasis is important is because single- celled organisms rely on it so it can carry out all the functions necessary for life.
Plants that have tube-like structures for water and nutrients to travel up and down from roots to leaves
Answer:
the answer is vascular plants
Explanation:
The question refers to vascular plants, plants with specialized structures for conducting water, nutrients, and sugars. These structures, known as xylem and phloem, allow these plants to grow larger and survive in diverse environments.
Explanation:The student's question relates to plants with tube-like structures, which is a reference to vascular plants. Vascular plants are characterized by the presence of specialized structures for the movement of water and nutrients: the xylem and phloem, collectively known as vascular tissue. The xylem transports water and minerals from the roots to other parts of the plant, while the phloem distributes sugars produced via photosynthesis from the leaves to other parts of the plant.
Examples of vascular plants include trees, shrubs, and flowering plants. This feature allows these plants to grow larger and survive in a multitude of environments.
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Which is not a method that protists
can use to move
cilia
spores
flagella
pseudopods
Games like tag and hide and seek are examples of:
A: Constructive play
B: Fantasy play
C: Creative play
D: Motor play
E: Parallel play
Answer:
D: Motor play
Explanation:
There are various games that could be play among children such as
: Constructive play
Fantasy play, Creative play, Motor play and Parallel play
A motor skill is associated with muscle, There are different fitness components associated with motor skill games which are speed, agility,coordination and others. Motor games can be carried out
when one's brain, nervous system and muscles work together to move parts the part of one's body
how do specialized cells within an organism help the organism perform the essential function of life
Answer:
Systems of specialized cells within organisms help them perform the essential functions of life, which involve chemical reactions that take place between different types of molecules, such as water, proteins, carbohydrates, lipids, and nucleic acids. All cells contain genetic information in the form of DNA molecules.
Explanation: :)
How many population can make up a community
Answer: Individuals make up a population; populations make up a species; multiple species and their interactions make up a community; and multiple species and their interactions make up ecosystems when you include the abiotic factors. This is the hierarchy of ecology.
hope this help
Explanation:
All the genetic material needed to grow a human is present in the ___________ of its cells.
Question 1 options:
cytoplasm
nuclei
lysosomes
endoplasmic reticulum
The answer is nuclei
In any environment, the 'fittest'organism is the...
ANSWER PLZ ASAP!!!!
which of the following is not generally considered a threat to endangered species
Answer:
B.) Competition for mates
Explanation:
Generally, species become endangered in the first place has to do with humans. If you analyze the other options, they each typically are caused by humans.
Poaching is illegal hunting or capturing of animals (endangered or not)
Clear-cutting is the same as deforestation, and causes habitat loss
Introduction of non-native species is typically caused by people who bring pets from other countries back to their native countries.
A competition for mates isn't normally something that causes a species to go endangered or extinct. The other options are much more threatening to this!
Which of the following answer correctly describe DNA. There is more than one correct answer.
Bases are adenine, uracil, cytosine and guanine.
Bases are adenine, thymine, cytosine and guanine.
Single helix
Sugar is deoxyribose
Sugar is ribose
Double helix
Answer:
the second, fouth, and last
Explanation:
Double helix
Sugar is deoxyribose
Bases are adenine, thymine, cytosine and guanine.
those are true
Mark received one dominant allele for brown hair from his father and another dominant allele from his mother.
Which word describes his genotype?
A blonde
B heterozygous
Chomozygous
D brown
Answer:
homozygous
Explanation:
when an individual both copies of a given gene have the same allele
In genetics, an individual who receives one dominant allele and one recessive allele is said to be heterozygous for that gene.
Explanation:In genetics, an individual who receives one dominant allele and one recessive allele is said to be heterozygous for that gene. The dominant allele is represented by an uppercase letter, and the recessive allele is represented by a lowercase letter. In this case, since Mark received one dominant allele for brown hair from his father and another dominant allele from his mother, his genotype can be described as heterozygous.
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Kristen goes to the beach with her family on a summer afternoon. Her parents set up a
beach umbrella as a protection from the bright sunlight, and they place a small folding
table under it. Kristen takes a can of lemonade from an ice chest and drinks half of it. Then
she places the can on the table and walks down to the water. The dry sand feels very hot to
her feet, but the wet sand at the water’s edge, being constantly lapped by tiny waves, feels
cool. After about an hour of walking along the beach, Kristen returns to the umbrella. She
picks up her can of lemonade, and it is now warm.
1. Why does the dry sand feel hot to Kristen’s feet?
2. Why does the wet sand feel cool to Kristen’s feet?
3. Why has Kristen’s can of lemonade become warm?
4. What example of thermal equilibrium can you identify in this scenario?
The dry sand feels hot due to its low thermal conductivity and low specific heat, causing it to rapidly warm on the surface. The wet sand feels cooler due to the higher specific heat and thermal conductivity of water, in addition to evaporative cooling. The lemonade warms up due to thermal equilibrium, reaching the temperature of the surrounding air.
Understanding Thermal Phenomena at the Beach:
Dry sand feels hot to Kristen's feet because sand has a low thermal conductivity, which means it does not distribute heat well. The heat from the sun stays at the surface, causing the top layer to become much hotter than the lower layers. This is also impacted by the sand's low specific heat, causing it to heat up quickly when exposed to sunlight.
Wet sand feels cool because water has a higher specific heat and a better thermal conductivity than sand. As a result, the heat is absorbed more uniformly throughout the wet sand and water, and the energy from the sun is partly used to evaporate water, which has a cooling effect due to the energy required for the state change from liquid to gas.
Kristen's can of lemonade becomes warm due to thermal equilibrium. The can's temperature adjusts to match the surrounding air temperature under the umbrella, which is warmer than when she initially took the drink out of the ice chest.
An example of thermal equilibrium in this scenario is the warm can of lemonade which has reached the same temperature as the surrounding air under the umbrella after being left out for an hour.
How do pain relievers work?
A.) Increase production of white blood cells
B.) Increase body temperature
C.) Block messages within the nervous system
D.) Block hormone production
Answer:
C
Explanation:
The pain relievers work by blocking messages within the nervous system. Therefore, the correct option is C.
What are pain relievers?Pain relievers are the medications that are used to reduce or relieve pain and other variety of problems such as headache, chronic or acute pain after trauma, etc.
Most pain relievers work by blocking the production or release of certain chemicals in the body that send pain signals to the brain. These chemicals, called prostaglandins, are produced by the body in response to injury or inflammation.
Pain relievers like aspirin, ibuprofen, and naproxen work by blocking the enzyme that produces prostaglandins, thereby reducing pain and inflammation. Therefore, the correct option is C.
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Which of the following would provide physical evidence that could change the divisions on the geologic timeline?
A. the discovery of ancient ruins buried deep in the ocean floor sediments
B. the discovery of fossilized microorganisms in ocean floor sediments
C. the discovery of evidence of humans who lived long ago
D. the discovery of evidence of different kinds of rocks that recently appeared
Answer:
b
Explanation:
Physical evidence that could alter the divisions on the geological timeline would be provided by the discovery of preserved microbes in ocean floor strata. So, the correct option is B.
What is Geological timeline?The Earth's rock record serves as the foundation for the geologic time scale, also known as the geological time scale. It is a method of temporal dating that makes use of geochronology and chrono stratigraphy. Earth scientists use it mostly to explain the sequence and connections between events in the Earth's geologic past.
The first animal and plant life on Earth, the emergence of mountains on Earth, and the destruction of the dinosaurs are just a few instances of events that are recorded on the geologic time scale.
The finding of preserved microorganisms in ocean floor strata would provide tangible proof that could change the divisions on the geological timeline.
Therefore, the correct option is B.
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Darwin’s theory of evolutions unifies all of __________.
Answer:
biology
Explanation:
Desertification may be caused by
water pollution
smog
rain
overgrazing
Answer:
Water pollution
Explanation:
Polluted water can lead to crops dying and dehydrated, leading to desertification.
What is a potential effect of rapid climate change on Earth?
Answer:
Melting polar ice caps leading to rising ocean waters
Explanation:
Which of these is a reason that we should perhaps be using more nuclear energy?
A.
The technology used in nuclear power plants is used in other industries.
B.
It does not contribute to atmospheric (air) pollution.
C.
Nuclear power is more efficient (more energy per mass) than other sources.
D.
All of these.
Answer:
b
Explanation:
write a paragraph about ocean currents
Answer:
Ocean currents are basically water wind.
Explanation:
If there is less space for natural ecosystems, then _____ may happen to plants and animals living in those ecosystems. *
the first person will be the brainliest
I believe that death will be the result.
When a cell differentiates, it becomes a stem cell.
○True
O False
Answer:
Technically yes, and no. Read the following:
Explanation:
Stem cells can give rise to specialized cells. When unspecialized stem cells give rise to specialized cells, the process is called differentiation. While differentiating, the cell usually goes through several stages, becoming more specialized at each step.
The statement is incorrect. Cell differentiation is the process by which a stem cell, which is less specialized, becomes more specialized. This ability of stem cells sets them apart as they can regenerate and replace damaged cells.
Explanation:The statement 'When a cell differentiates, it becomes a stem cell' is False. This is because cell differentiation is the process by which a less specialized cell, such as a stem cell, becomes a more specialized cell type. For instance, stem cells can differentiate to become heart muscle cells, brain cells, or skin cells, among others. The ability of stem cells to differentiate into specialized cells is what makes them so important in biology and medicine - they're essentially a cell type that can regenerate and replace damaged cells in the body.
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While performing online research on bacteria, Emilie found that some bacteria survive even in hydrothermal vents that can be traced back to early common ancestors. Which bacteria are these?
A.
hydrophilic bacteria
B.
hydrophobic bacteria
C.
thermophilic bacteria
D.
thermophobic bacteria
E.
lipolytic bacteria
Answer:
C. thermophilic bacteria
Explanation:
These types of bacteria can live in high temperature or they require high temperature to live. Archae bacteria belongs to thermophiles. These bacteria grow well in temperature between 55 to 113 degrees Celsius. These bacteria found in hot springs and hydrothermal vents. Examples of thermophilic bacteria are Cyanidium caldarium and Chaetomium thermophile.
Answer:
c
Explanation:
the carbon cycle begins when
Answer:
when carbon goes from the atmosphere into organisms and the Earth and then back into the atmosphere. Plants take carbon dioxide from the air and use it to make food.
Explanation:
Incomplete dominance can be observed in snapdragons. Snapdragon flowers
that have two RR alleles have a red phenotype. Snapdragon flowers with arr
have a white phenotype. Snapdragon flowers that are Rr are pink.
11. Fill in the two Punnett squares in diagram at right.
12. This is a non-Mendelian trait, but how could this be different if the trait
was Mendelian?
Incomplete dominance is observed in snapdragons, where the phenotype of the flower is determined by the combination of alleles. The Punnett squares show the possible genotypes and phenotypes of the offspring. If the trait were Mendelian, there would be distinct phenotypic differences between the homozygous genotypes.
Explanation:Incomplete dominance is observed in snapdragons, where the phenotype of the flower is determined by the combination of alleles. In this case, snapdragons with two RR alleles have a red phenotype, those with aa alleles have a white phenotype, and those with Rr alleles have a pink phenotype.
The Punnett squares can be filled out by crossing a RR individual with an rr individual or crossing two Rr individuals. In the first case, all offspring will be Rr (pink phenotype). In the second case, there will be a 1:2:1 ratio of RR:red, Rr:pink, and rr:white offspring.
If the trait were Mendelian, the dominant allele would completely mask the recessive allele, resulting in a clear-cut phenotypic difference between the two homozygous genotypes RR and rr, without any intermediate phenotype.
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WILL DO BRAINLY. The diagram shows fossils embedded in rock layers.
Based on the diagram and the table, when was fossil 1 formed?
A) after any of the other labeled fossils
B) before any of the other labeled fossils
C) after fossil 2, but before fossils 3, 4, and 5
D) before fossil 2, but after fossils 3, 4, and 5
Answer:
D)
Explanation:
Since the fossil is on the second layer anything above that is formed directly after since it is on the top. Meanwhile everything below that was formed before.
Which organism will have DNA most similar to the bird? Why?
Answer:
reptiles have similar to the bird.
Final answer:
Members of the same species have the highest DNA similarity and organisms with a more recent common ancestor share more DNA sequences in common. Comparison of DNA among different organism pairs shows varying degrees of molecular differences based on the time since their evolutionary split. A bird is genetically closer to another bird species due to shared evolutionary history.
Explanation:
The organism that would have DNA most similar to a bird is likely another bird species due to the homologous structures and genetic similarities they share, illustrating a close evolutionary relationship. Broadly speaking, members of the same species have the highest level of DNA alignment. In contrast, organisms that diverged earlier in evolutionary history, such as a bird and a mammal, would have more significant molecular differences in their DNA. Hence, when comparing DNA similarities among various organisms, the evolutionary timeline is a critical factor. Comparisons between a mammal and a bird, a mammal, and a frog, or a mammal and a fish would reveal increasingly significant differences the further back the common ancestor existed.
For instance, a whale would share more DNA sequences with a horse than with a shark, even though sharks may appear more similar to whales due to their aquatic environments. This is because whales and horses are both mammals, whereas sharks are fish, and the evolutionary split between mammals and fish occurred much earlier.