Cell is the term that best captures the fundamental level of organization and structure found in all living things. the tiniest component of all living things, including cells and other body tissues, and the smallest unit capable of independent existence.
How do cells work, and what are they made of?They support the body's structure, consume nutrients from meals, transform those into energy, and perform certain tasks.
Who coined the term cell?In 1665, the cell was found by Robert Hooke. With the aid of a compound microscope, Robert Hooke examined a piece of wine cork and discovered tiny structures that looked like little rooms. His designation of these "rooms" as "cells" follows.
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Given that almost all organisms obtain energy from food by the process of cellular respiration, which is the most likely explanation for what prevents Earth from running out of oxygen?
Answer:
Oxygen cycles keeps the flow of oxygen at a constant rate.
Explanation:
The oxygen constitutes about 20% of the gaseous components in the atmosphere and it's being renewed continuously by the various microorganism and primary producers as green plants that use photosynthesis and converts the sunlight and carbon dioxide to water and releases oxygen. Oxygen cycle makes life possible as most of the elements are combined with oxygen in some way or another and are found on the lithosphere, hydrosphere, and atmosphere even biosphere hence its is present insufficient amounts.
Answer:
A.) The net effects of the reactions of photosynthesis and cellular respiration are the opposite of one another, therefore the products of one are the reactants of the other, creating a cycle.
Explanation: Hope this helps!!
The kind of bond that lipids won’t form with water is a _ _ _ _ _ _ _ _ bond.
What goes in the blank spot?
Brainliest!
in an atomic model that includes a nucleus, positive charge is
Answer: The options are not given, here are the options.
a. located in the space outside the nucleus.
b. spread evenly throughout an atom. c. concentrated at multiple sites in an atom.
d. concentrated in the center of an atom.
The correct option is D.
concentrated in the center of an atom.
Explanation:
In an atomic model, the atomic particles has the nucleus which is located at the center of the particle. This nucleus contain positive charge which is called proton at the center and the neutrons(no charge). The electrons is located out side the particle she'll or nucleus and atomic particles become neutral because the number of protons is equal to the number of electrons which is negatively charge orbiting outside the nucleus.
Which of the following presents the best argument as to the role of the cow in this cycle?
Answer:
Cow dung helps in balancing the environment and kills germs
Explanation:
Cow dung is used for fertility of the soil. It is also used for the control of pest in the plants. When heated cow dung can be used to cook food where there are lack of wood available. Also when it is heated it releases the gases which kills germs present in the air.
Answer:
The cow eats plants and produces carbon dioxide through cellular respiration. The plants, which gain energy from the sun, then take carbon dioxide from the atmosphere and use it in photosynthesis.
Explanation:
I did the test
Why does it get more difficult to do a wall sit as the time passes?
Answer:
your core muscles and legs muscles would get tired after a prolonged period of time. this goes for other exercises as well, not just wall sits.
Explanation:
What describes the components of a coral reef community?
As you have observed, animal hairs usually have a large medulla composed of air-filled compartments. These air-filled compartments are present for a reason and can actually help hair do its job better. Describe one reason that might explain why having a hair made of air filled compartments could be helpful to an animal.
PLEASE HELP
Answer:
to provide insulation
Explanation:
The medullary index is the proportion of the diameter of the hair medulla in regard to the diameter of the entire hair: The equation to calculate the medullary index is medulla diameter/hair diameter. In animals, the hair medulla is generally thicker compared to humans (medullary index approximately 0.5 and 0.33, respectively). The thicker the diameter of the hair medulla, the better is the insulation.
In a lab investigation, one group of students (group A) measures the speed of a .1 kg toy car to be 2.5 m/s at the bottom of a ramp. Another group of students (group B) measures the speed of a car to be 3 m/s at the bottom of a ramp. The car's starting position at the top of the ramp is 1 m high. What is the potential energy of the car at the beginning of the experiment before its speed is measured?
Answer:
i think you have to do 1k *2.5 m/s= 2.5
and
3m/s *1m = 3
and then you do 3-2.5
Most mutations that cause cancer occur within body cells, and body cell mutations are not inherited. If cancer is not inherited, why does cancer statically appear to run in families?
Family members have a similar genetic make-up that may make them predisposed to cancer.
Family members are exposed to similar environmental conditions.
Family members have a widely varied genetic make-up that can be affected by specific mutagens.
Family members share the contagious mutagens that can be passed by close exposure.
Answer:
Family members have a similar genetic make-up that may make them predisposed to cancer.
Explanation:
Variation in certain genes can increase the risk of developing certain cancers. This is why certain cancers run in families. There are lots of examples where the risk factor is small, but in some cases, the risk factor is very large.
For example, mutations in BRCA1 are very highly linked to the risk of breast cancer. As a result, many women with mutations in this gene opt to get a mastectomy to reduce their chances of developing breast cancer.
What organelle is labeled ?
Which organs are part of the excretory systems
Answer:Kidney
Explanation:
The Excretory system is responsible for the elimination of wastes produced by homeostasis. There are several parts of the body that are involved in this process, such as sweat glands, the liver, the lungs and the kidney system.
An organs Kidney, ureter, urinary bladder and urethra are part of the excretory systems.
What is excretory system?It is biological system.The Excretory system eliminate excess wastes material from the body of the organism.It help to maintain internal chemical homeostasis.It prevent body for damage.Kidney filter the blood and filtrate obtained is urine.This urine is passes through ureter to urinary bladder and expelled out the body.To learn more about organs here,
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What would be the complementary strand to ATC GTT ACG?
What first caused people to consider that the continents were once one large landmass?
glacier evidence in warmer countries
continents looked like they fit together
studying the valleys of the ocean floor
similar fossils were found on many continents
Answer:
B- continents looked like they fit together =^.^=
Explanation:
I GOT IT RIGHT >:3
People believed that the continents were once one large landmass because the continents looked like they fit together.
What is the Pangaea?Pangaea refers to the one very big landmass which contains all the continents today fitted together.
Geologists believe that the while earth was once a large landmass without the continents as we have it today.
The first evidence for this belief is that continents looked like they fit together.
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How does a calorie on a food label relate to a calorie that is produced in cellular respiration?? Please help
Answer:
There are 1000 calories in 1 Calorie (notice the difference in the capital C) on our food labels the Calories are given. Cellular respiration ; the process that releases energy by breaking down glucose and other food molecules in the presence of oxygen, begins with a chemical pathway called glycolysis
Explanation:
Hope this helped, Have an amazing, spooky Halloween!!
The relationship between the calorie on a food label with the calorie produced in a cellular respiration is ;
I Calorie on a food label is equivalent to 1000 calories produced in cellular respirationWhen labeling food to indicate the nutrients contained in the food ( especially canned foods ) the amount of calories contained in the food is indicated and for every Calorie ( 1 calorie ) indicated on the label represents an equivalent of 1000 calories found in cellular respiration.
Hence we can conclude that 1 Calorie indicated on a food label is an equivalent of 1000 calories produced in a cellular respiration.
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A __________
mutation occurs when a base in the DNA sequence is replaced by a different
base.
Answer:
Substitution Mutations
Explanation: A substitution mutation occurs when specific bases (A, T, C or G) in a gene are swapped for different ones. This type of mutation doesn't cause a difference in the number of bases like insertion or deletion mutations do. Substitution mutations just switch out one or more bases for different ones.
Hope this helps :3
A substitution mutation occurs when a base in the DNA sequence is replaced by a different base.
What do you mean by substitution mutations?Substitution is a type of mutation in which one nucleotide is replaced by a different nucleotide. The term can also refer to the replacement of one amino acid in a protein with a different amino acid.
Base substitutions are the simplest type of gene-level mutation, and they involve the swapping of one nucleotide for another during DNA replication. For example, during replication, a thymine nucleotide might be inserted in place of a guanine nucleotide.
Substitution mutations can be good, bad, or have no effect. They cause three specific types of point mutation: silent, missense, and nonsense mutations.
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The Pompeii worm was discovered near _______. a. a hydrothermal vent b. a sea mount c. Hawaii d. the great barrier reef Please select the best answer from the choices provided A B C D
Answer:
The answer is A. hydrothermal vent
Explanation:
I just did it
Alvinella pompejana is known as the Pompiee worm. This organims is found in the deep hydrothermal vents in the Pacific ocean. Thus, the correct option is A.
What is Pompiee worm?Alvinella pompejana, the Pompeii worm is a species of the deep-sea polychaete worm. It is an extremophile found only at the hydrothermal vents of the Pacific Ocean, discovered in the early 1980s off the Galápagos Islands by the French marine biologists.
The Pompeii worm (Alvinella pompejana) is a deep-sea polychaete vermiform extremophile. This organism can survive at extreme conditions. It is possible because of their bacterial coating which redistributes the heat to keep the worm cool. This bacteria not only help regulate the temperature of the worm but they also break down minerals from the vent to aid their host.
Therefore, the correct option is A.
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As lactose approaches the active site of lactase, as shown in the image, which of the following occurs first?
The lactose molecule is broken into glucose and galactose.
Lactase shifts to its lowest free energy level to allow lactose to enter the active site.
Lactose creates a microenvironment as it approaches lactase to promote binding.
Temporary bonding occurs between the active site and the substrate, causing a conformational change.
Answer:
There is no image attachment, however, this question can be answered based on general understanding of enzymes. The answer is:
Temporary bonding occurs between the active site and the substrate, causing a conformational change.
Explanation:
Enzymes are proteinous molecules that acts as catalyst in biochemical reactions by speeding up the rate of reactions. According to this question, lactase is an enzyme that acts on lactose sugar and breaks it down into its monomeric unit (glucose and galactose).
All enzymes possess an active site, with which they bind to their substrate. In this question, the lactose (substrate) approaches the active site of lactase (enzyme), what occurs first is that a temporary bonding occurs between the active site and the substrate, causing a conformational change in the shape of the enzyme.
When an organism consumes other organisms for food they are called heterotrophs. When organisms can create their own food they are called autotrophs. Which kingdoms are autotrophic, heterotrophic, and which can be either? Animalia: Plantae: Protista: Fungi:
Answer:
Kingdoms that are autotrophic-
Plantae
Kingdoms that are heterotrophic-
Fungi
Animalia
Protista could be either or.
I think there is something about yeast than all the rest of fungi but you will have to look that up.
Explanation:
i need help answering these questions
Answer: A
Explanation:
please help i’ll mark brainliest
Answer:
m
Explanation:
Answer:
Muscle Cell - Muscle Tissue - Biceps Muscle - Muscular System
Which organelle would you expect to find in animal cells but not plant cells?
O A. mitochondrion
OB. ribosome
C. lysosome
O D. A. smooth endoplasmic reticulum
Answer:
Lysosome
Explanation:
Fungi have characteristics that make them similar to both plants and animals. Which characteristic do fungi share with plants but not animals?
·reproduce sexually
·contain nuclei
·have cell walls
·make their own food
Explanation:
·have cell wall
cell wall is present in plant and fungi due to protection
but not in animals due to locomotion mode of life
Fungi have cell walls characteristic which fungi share with plants but not animals, hence option C is correct.
What are the characteristics of fungi?When compared to animals, fungi need prepared organic substances for energy because they are heterotrophic organisms without chloroplasts.
Fungi are eukaryotic organisms, just like plants, and have nuclei in each of their cells. Like plants, fungi lack a cell wall and vacuoles, however, they do have a material called chitin in their cell walls that plants do not. In numerous important respects, fungi are also similar to animals.
Eukaryotic, non-vascular, immobile, heterotrophic creatures are fungi. They could be filamentous or unicellular and spread spores to reproduce. The phenomena of generational alternation are seen in fungi.
Therefore, in comparison to plants, fungi have vacuoles and a cell wall.
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Which of the following is NOT true about matter in the biosphere?
a) Matter is transferred in one direction through the biosphere. b) Biogeochemical cycles transform and reuse molecules. c) The total amount of matter decreases over time. d) Human activity does not affect the movement of matter
Answer:
c) The total amount of matter decreases over time.
Explanation:
The statement 'the total amount of matter decreases over time' is NOT true about the matter in the biosphere (Option c).
The biosphere refers to the total of all ecosystems of the Earth.The biosphere can be defined as a closed system in terms of matter because matter does not enter or exit.In the biosphere, the total amount of matter remains constant over time, whereas the total amount of energy decreases over time.This energy is lost in the form of heat when it spreads from the Earth's surface and outward into space.In conclusion, the statement 'the total amount of matter decreases over time' is NOT true about the matter in the biosphere (Option c).
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To which of the following environmental changes are populations most able to adapt?
b. seasonal temperature changes.
bc tornados, floods, and forest fires do a lot of damage.
Which is the role of restriction enzymes?
to isolate the selected gene
to cut DNA into fragments of different lengths
to move and separate the strands of DNA
to join the sticky ends of DNA fragments
Answer:
to cut DNA into fragments of different lengths
Explanation:
A restriction enzyme is a protein that recognizes a specific, short nucleotide sequence and cuts the DNA only at that specific site, which is known as restriction site or target sequence.
More than 400 restriction enzymes have been isolated from the bacteria that manufacture them. In live bacteria, restriction enzymes function to defend the cell against invading viral bacteriophages. Restrictions sites in the viral genome (a "happy accident" of nature, as far as the bacteria are concerned, since they don't appear to have any specific function in the virus) are cleaved by the bacterium's restriction enzymes, fragmenting and destroying the DNA of invading bacteriophages before it can incorporate into the host's genome and take over the cell.
A bacterium is immune to its own restriction enzymes, even if it has the target sequences ordinarily targeted by them. This is because the bacterial restriction sites are highly methylated, making them unrecognizable to the restriction enzyme.
Isn't evolution fantastic?
The correct answer is option C i.e. to cut DNA into fragments of different lengths.
what is restriction enzyme?A restriction enzyme is a bacterial protein that cleaves DNA sequences at sequence-specific places, resulting in DNA fragments with known sequences on both ends.
Certain laboratory processes, such as recombinant DNA technology and genetic engineering, require the use of restriction enzymes.
There are four different types of restriction enzymes: type I, II, III, and IV, which differ principally in structure, cleavage site, specificity, and cofactors.
Both restriction and methylase functions are carried out by a single big enzyme complex in Types I and III enzymes.
The restriction enzyme is independent of its methylase in the Type II system.
Several thousand type II restriction enzymes have been identified from a variety of bacterial species.
These enzymes recognize a few hundred distinct sequences, generally four to eight bases in length.
Type III restriction enzymes are a group of endonucleases that recognize a non-pallindromic sequence, comprising two inversely oriented sites.
Type IV restriction enzymes cleave only methylated DNA and show weak sequence specificity.
hence, the correct answer is option B.
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1. A rabbit can cover a distance of 80 min 5 s. What is the speed of the rabbit?
Answer:
[tex]\boxed {\tt 16 \ m/s}[/tex]
Explanation:
Speed can be found by dividing distance by time.
[tex]s=\frac{d}{t}[/tex]
The rabbit travels 80 meters in 5 seconds.
The distance is 80 meters and the time is 5 seconds.
[tex]d= 80 \ m \\t- 5 \ s[/tex]
Substitute the values into the formula.
[tex]s=\frac{80 \ m }{5 \ s}[/tex]
Divide.
[tex]s= 16 \ m/s[/tex]
The rabbit's speed is 16 meters per second.
Plz help me!! will mark brailyest!!!
how does tempature impact air movement?
Answer:
The heating of the earth, which in turn heats the atmosphere, is responsible for the motions and movements of the air in the atmosphere. The faster molecules move, the hotter the air. As the molecules heat and move faster, they are moving apart.
Explanation:
Answer:
As you move higher off the ground, it gets colder *and vice versa*.
Explanation:
When we move off the ground, density is pulled down to the ground due to gravity. Therefore, it gets colder. It's also because of our atmosphere. (Vice versa, of course)
P.S. Density and gravity are also key parts of climate change, keep that in mind.
Explain Meiosis.
Please do it in 3 sentences or more
Answer:
Explanation:
Meiosis is a special type of cell division of germ cells in sexually-reproducing organisms used to produce the gametes, such as sperm or egg cells. It involves two rounds of division that ultimately result in four cells with only one copy of each paternal and maternal chromosome.
What would be the main problem with reproduction if meiosis did not take place to form sex cells?
Answer:
Fertilization would result in a zygote with twice as many chromosomes as the parents.
Explanation:
Meiosis creates four haploid cells from a diploid parent cell. These haploid cells are the sex cells - sperm cells and egg cells.
Since these cells are haploid (containing 23 chromosomes, half the amount of chromosomes as the parent diploid cells), when they fuse during fertilization, they form a diploid zygote containing 46 chromosomes.
Answer:
B) Fertilization would result in a zygote with half as many chromosomes as the parents.
Explanation:
Which type of rock forms as a result of cooling and crystallization?
igneous
metamorphic
clastic
sedimentary