Answer:
What role did endosymbiosis play in the evolution of eukaryotes? Endosymbiosis led to the evolution of eukaryotic cells with mitochondria and chloroplasts. This kind of natural selection led to the evolution of eukaryotic cells and the plants and animals we see today.
Explanation:
Endosymbiosis is important because it is a theory that explains the origin of chloroplast and mitochondria. It is also a theory that explains how eukaryotic cells came to be. DNA, RNA, Ribosomes and Protein Synthesis
This provided the first substantial evidence for the endosymbiotic hypothesis. It was also determined that mitochondria and chloroplasts divide independently of the cell they live in.
Carbon is an essential element for life how does its atomic structure allow it to form so many different molecules
Answer:
This is because Carbon has four valence electrons (tetravalent) which gives it the ability to form up to four bonds differently with different elements/compounds. This gives rise to the creation of lots of compounds.
Carbon as an element also has atoms which fits into most substances thereby creating different possible compounds with others such as in carbohydrates, proteins, lipids etc. This is what makes Carbon an essential element for life.
Which of the following statements is true? Group of answer choices All forms of life employ the same genetic code mRNA is the only type of RNA found in the living system A typical human liver cell has one set of chromosomes Organisms interact but do not affect their environment
Answer:
All forms of life employ the same genetic code
Explanation:
The genetic code refers to the set of rules that facilitates the translation of nucleotide sequences into amino acids sequences (proteins). mRNA is read in a group of three nucleotides called CODON, which specifies a particular amino acid. The totality of all codons makes up the genetic code.
However, one of the characteristics of the genetic cos is its UNIVERSAL nature. The genetic code is said to be nearly universal meaning that the genetic code is the same in almost all living organisms with few exceptions. For example, AUG codon encodes Methionine amino acid in all forms of life.
Hence, All forms of life employ the same genetic code is TRUE. Note that, tRNA and rRNA are other types of RNA found in living systems. Also, liver cells are diploid i.e. has two sets of chromosomes. Lastly, interacting organisms affect their environment
All the forms of life employ the same genetic code.
• It is true that all the forms of life exhibits the same genetic code, however, they do not possess similar genome.
• The set of rules used by the living cells is known as the genetic code.
• It is used to translate information encoded within the genetic substance, that is, mRNA or DNA sequences into the proteins.
• The genetic code is greatly identical among all the organisms and can be articulated in a simple table with 64 entries.
Thus, the correct statement is that all the forms of life employ the same genetic code.
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Which molecules require active transport to enter or exit the cell?
Answer:
a
Explanation:
compare and contrast the cells of plant and animals
Answer:
Although animal and plant cells are surprisingly similar, most of the difference between them is in their organelles. For example, plant cells have all the organelles found in animal cells plus:
Cell wall - this is a cellular structure outside of the cell membrane that gives structure to the cell, so it can have rigidness and maintain its shape.Chloroplast - this organelle captures the energy from the sunlight and converts it into chemical energy.Vacuoles - (these are present in animal cells too but are very rare) this organelle is common in plant cells and store water, waste products, food, etc.Organisms cannot make their own food without
cell membranes
cell walls
chloroplasts
Vacuoles
Answer:
The correct answer is - chloroplasts
Explanation:
Plants or autotrophs contain exceptional organelles considered chloroplasts that traps light and use it to use carbon dioxide and water into sugar and oxygen. Living organisms without chloroplasts can not make their own food.
Chloroplasts look like oval, flat circles. Like mitochondria, they also have two membranes. The whole organelle encased by the outer membrane. The inner membrane contains stroma, a thick fluid, which makes up the vast majority of the chloroplast's volume. Dispersed all through the stroma are piles of empty plates called grana that contain chlorophyll, which traps sunlight based on the intensity for use during photosynthesis.
Answer:
what they said
Explanation:
What are the 4 Kingdoms in the Eukarya Domain? A) There is only one. B) Protists, Fungi, Plants, Bacteria C) Protists, Fungi, Plants, Animals D) Protists, Bacteria, Archaea, Plants
frederick wanted to findout what soil works best for growing roses.he greq them in potting soil,clay,sand,he found outside his yard.After one week,he measured their height and how many leavesthey had. what is the independent, dependent, control and constant?
Answer: Independent Variable: type of soil
Dependent Variable: height of the growing roses
Control: Idk
Constants The rose
Explanation:
Independent Variable: type of soil, Dependent Variable: height of the growing roses, Control: other environmental conditions, Constants The rose.
What are experimental variables?
An eye-tracking experiment must include variables. Anything that may vary or be altered is a variable. To put it another way, it refers to any variable that may be altered, taken into account, or assessed in an experiment.
Different kinds of variables are used in experiments. We'll go through some of the most important categories of experimental variables, their definitions, and examples using each category of a variable.
Independent variables (IV): In an experiment, they are the elements or circumstances that you control. Your claim is that there is a direct relationship between this variable and the dependent variable.Dependent variables (DV): are the elements you see or quantify. You may see what happens to your dependent variable when you change your independent variable.
Therefore, Independent Variable: type of soil, Dependent Variable: height of the growing roses, Control: other environmental conditions, Constants The rose.
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correctly name the organelle responsible for this impressive mechanism action described above
the nucleus of the cell
A grassy meadow high in the Sierra Nevada Mountains of eastern California is known to support a variety of organisms. During the summers when grass is thick and lush, and wildflowers abound, butterflies take advantage of this abundant nectar source. Bears graze on the berries in shrubs at the edge of the meadow. Deer also forage at the edge of the meadow. In the early mornings, coyotes are known to prey on the squirrel and mouse populations that burrow into the meadow soil. A variety of birds prey on the butterflies and other flying insects, such as bees and wasps.
If the biomass of flowers that support the butterflies was known to contain 100,000 units of energy, and certain bird species were eating the butterflies that foraged on the flowers, what amount of energy, on average, could be expected to be transferred to the birds?
Group of answer choices
a)100
b1,000
c10
d10,000
e50,000
Answer:
b) 1,000
Explanation:
In a typical food chain as described in this question, flow of energy occurs from one organism to another when they feed/fed upon. As one organism feeds, energy gets transferred to it. However, only about 10% of the available energy in the lower trophic level gets transferred because majority of the energy (about 90%) is lost as heat during metabolic processes of the organism.
Hence, if a flower contains approximately 100,000 units of energy and is fed on by butterflies. 10% of 100, 000 = 10,000 units gets transferred to the butterflies.
Likewise, the butterflies gets fed on by certain bird species. 10% of the available 10,000 units of energy in the butterfly gets transferred to the birds.
= 10/100 × 10,000 = 1000 units of energy.
How do oceans play a part influencing our Earth systems?
Ocean currents act much like a conveyor belt, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics. Thus, ocean currents regulate global climate, helping to counteract the uneven distribution of solar radiation reaching Earth's surface.
Explanation:
Answer:
Well, it plays a part because it is our key to making our Earth called home... The earth is majority filled with water. It plays a part also by giving us water, and many much more things that require water...I can go on forever and say how it gives us food as well... if we never had water, we would never have veggies and crops to keep us alive...
Explanation:
(Don't take it from me... take it from Nature...)
do carbon dioxide attract mosquitoes
Answer:
Yes, it does.
Explanation:
Mosquitoes are attracted to the carbon dioxide animals create
Which of the following best describes how does latitude affect biomes?
Higher latitudes receive less sunlight producing cold biomes.
Latitudes affect how much rainfall a biome will receive.
Lower latitude biomes will always have high temperature.
Higher latitudes produce warm biomes.
Answer:
A) higher latitudes receive less sunlight producing cold biomes
Explanation:
Biomes are determined primarily by temperature and precipitation. Generally speaking, biomes at higher latitudes (further away from the equator) are cooler and drier. Closer to the equator, biomes are generally warmer and wetter, as warmer air holds more moisture than colder air.
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Answer:
A. Higher latitudes receive less sunlight producing cold biomes.
atoms and molecules that make up a rock a>never move b>are in constant motion c>move when the rock is broken d>move when the rock is melted
Answer: I am not a outstanding chemist so forgive me if I am wrong but I think the answer would be
a>never move
I say this because one a rock is a solid and two even when broken I believe that would be Braking apart chemical bonds not moving atoms but again I am just going of rust high school chemistry knowledge.
The atoms and molecules that make up a rock never move. The correct option is a.
What are rocks made of?Minerals are the building blocks of rocks. They can be all one type of mineral, such as sandstone, which is made of sand, or they can be made of a variety of minerals, such as granite.
The Earth's crust is made up of rocks, which include the surface forms we see every day.
The particles in a solid are extremely attracted to one another. They are close together and vibrate in place, but they do not move past each other.
Rocks are classified into three types: sedimentary, igneous, and metamorphic.
Each of these rocks is formed by physical changes that occur as part of the rock cycle, such as melting, cooling, eroding, compacting, or deforming. Sedimentary rocks are formed from fragments of other rocks or organic material.
Thus, the correct option is a.
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Regions of the body which require large surface area for absorption, such as the cells covering the inner surface of the small intestine, often have
Answer:
layers of cell membranes- micro villi
Explanation:
They are similar to cilia but shorter in length and diameter.They have average diameter of micrometer with average length of 2 micrometer
These are layers of cells membrane which protrudes or extended on the epithelial lining of the small intestine.They are microscopic in structure,and their major function is to increase the surface area of the small intestine for absorption of digested food substances. Therefore reducing volume while aiding the rapid movement of the digested food into the bloodstreams.
Aggregate of micro villi is called brush border on the surface of the small intestine. Their activity with the villi aids the increase in the surface area which leads to absorption of food substances
A yellow tulip and a red tulip are
Answer: It is D variations of the same species
Explanation:
Suppose that you were discussing cell theory with someone who has little understanding of biology. Which object could you best use as an analogy to explain the evolutionary history of modern cells?
Answer:
evolution of human works
Explanation:
The cell theory states that all living forms are composed of cells. These cells are the basic structural units of all organisms and they evolved from pre-existing cells present in primitive living forms. From a biological point of view, the evolution of cells is similar to the evolution of human works, which were during the beginning of human civilization less specialized than in modern times. Likewise, somatic cells present in evolutionary recent multicellular organisms are capable of carrying out more complex functions than primitive cells present in unicellular organisms.
Which unit would be most appropriate to describe the height of a house?
A.meter
B.centimeter
C. Megameter
D. Kilometer
Answer:
A.) meter
Explanation:
1. Which of the following is an example of a scientific theory?
A. The law of gravity
B.an explanation of how disease spreads
C.an untested hypothesis about the structure of DNA
D. E =mc2
Answer:
The answer is B.
Explanation:
This is because a scientific theory is similar to a explanation.
Explain the purpose of the pH scale and what does it measure?
Answer:
pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water. Water that has more free hydrogen ions is acidic, whereas water that has more free hydroxyl ions is basic. Since pH can be affected by chemicals in the water, pH is an important indicator of water that is changing chemically.
1. What organism has the smallest number of chromosomes
Answer:
1. Smallest number: The female of a subspecies of the ant.
2. Myrmecia pilosula, has one pair of chromosomes per cell.
state two principles of treatment of a disease
Which temperature scale measures water boiling at 373 degrees?
A.Fahrenheit
B. Kelvin
C. Celsius
D. Newton
Should the food handler use the sanitizing solution to sanitize pans ?
Answer:
no because the sanitizer wont be effective
Explanation:
no matter how much sanitizer you put in it wont help because it wasn't at the right temperature
Lynn is classifying objects based on the material they are made of. Which
object should be included in the following group: bookshelf, wooden crate,
and telephone pole?
A.disk drive
B.paper clip
C.coffee table
D.automobile tire
Answer:
coffee table because it is most likely wooden
Explanation:
Describe the purpose of a scientific investigation.
Answer: Scientific investigation is a quest to find the answer to a question using the scientific method. In turn, the scientific method is a systematic process that involves using measurable observations to formulate, test or modify a hypothesis.
Viruses are resistant to which of the following: all of the above, freezing,disinfectants,heat
Answer:
All of the above
Explanation:
Numerous virus can survive in extremely hot, freezing, extremely acidic, or extremely salty settings. Additionally, the viruses that infect such bacteria must be able to maintain their infectivity under adverse circumstances. Thus, option A, C, D is correct.
What are the unfavorable conditions for virus?Because they lurk inside cells, viruses present a significant challenge to the immune system of the body.
Antiviral drug resistance may appear as chronic or escalating viremia or illness despite treatment, due to prolonged antiviral drug exposure and continued viral replication brought on by immunosuppression.
When a virus ceases responding to an antiviral drug, it is said to have developed antiviral resistance. Antiviral medications become ineffective or altogether useless as the virus evolves.
Therefore, virus are resistant.
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What would cause the porosity observed in a rock like scoria?
Answer:
Scoria is a dark-colored igneous rock with abundant round bubble-like cavities known as vesicles. It ranges in color from black or dark gray to deep reddish brown. Scoria usually has a composition similar to basalt, but it can also have a composition similar to andesite.
Explanation:
What is the relationship between the plant and animal cell structures? Can somebody please help me.
Answer:
Golgi apparatus's,ribosomes,rough endoplasmic reticulum,mitochondrion,nucleous,And cell membrane. while they both have vacuoles, a plant cells is much bigger than an animals cell.
Explanation:
Staphylococcus aureus (remember that an organism’s scientific name can also be written with the genus name abbreviated—in this case, S. aureus) is a bacterium, one of the groups of microorganisms. Although the different groups of microorganisms share some similarities, there are several important differences that distinguish each group. Drag each of the following statements to the appropriate bin to indicate whether it is a characteristic of bacteria archa fungi, or viruses.1. Derive nutrition from organic or inorganic sources or conduct photosynthesis2. Have cell walls that contain peptidoglycan3. Not typically associated with human disease4. Found in extreme environments5. Eukaryotic6. Can be unicellular or multicellular7. Cannot survive outside a host cell8. Can be seen only with an electron microscopeA. BacteriaB. ArchaeaC. FungiD. Viruses
Answer:
Viruses: Found in extreme environments. Cannot survive outside of a host cell, can only be seen with an electron microscope
Fungi: Obtain nutrition from organic or inorganic sources or carry out photosynthesis. It is not usually associated with human diseases. Eukaryote: It can be unicellular or multicellular.
Bacteria: They have cell walls that contain peptidoglycan. Found in extreme environments (via spores)
Explanation:
In the part of the answer, the answer was given by grouping the different characteristics of the microorganisms, classifying them into three groups.
Viruses are considered microorganisms that need the replicative machine to reproduce their RNA or DNA, this is how it is doubted whether they are living organisms or not.
Fungi belong to a very broad group of subtypes, but they all refer to the fungi kingdom, they are in the form of spores in the soil or in the air, those fungi that are considered pathogens for humans, such as the generators of histoplasmosis, or blastomycosis. Most fungi are not pathogenic to our body, so some are edible, such as yeast.
On the other hand, and finally we have bacteria, which are a family that is classified into many groups according to their genus and species, their shape is what determines their nomenclature, such as those coconuts, which are grouped together in a of bunch of grapes and are called thus streptococcus in synonymous to this method of colonization and form. Many bacteria are typical of our commensal flora or microbiota, others are not, thus generating opportunistic infections or severe infections.
What type of selection affects traits that influence an individual's chances to find a mating partner or be chosen as a mating partner?
Answer:
Sexual selection
Explanation:
It is sexual selection because it is a type of natural selection in which an organism or organisms acquire traits which help the individual to be choose as a mating partner or to have preference for a mating partner or for competition among one sex organisms in which a traits succeed.
Sexual selection can be intrasexual or or intersexual. Intrasexual is is competition between one sex of the same organism and intersexual is between sexes of different organism.