Answer and Explanation:
During the whole biota history, there occurred extinctions due to different reasons.
During the Cretaceous, which took place between 145-65 million years ago, there occurred a massive extinction that eliminated most of the species on the Earth. Many of the characteristic groups of this period were affected. Dinosaurs, Plesiosaurs, Ammonites, Tricodonts, Cycas, Gynkgos, Conifers, the recent angiosperms, birds, and mammals.
The extinction was caused by the volcanic eruptions, and the unusual fall of many different asteroids, which caused important changes on the Earth´s surface. The consequent climatic change was what ended affecting all the species directly. The extinction was gradual, although it occurred in a short geological lapse of time.
Which factor would have the greatest influence on the southern migration of animals living in the northern hemisphere
Answer:
Animal migration is the relatively long-distance movement of individual animals, usually on a seasonal basis. It is the most common form of migration in ecology. It is found in all major animal groups, including birds, mammals, fish, reptiles, Many of these migrations are north-south, with species feeding and breeding in.
HIV can remain latent for several years and not cause any symptoms in its host. What viral reproduction cycle is occurring during this latency period? What viral reproduction cycle is occurring once a person moves into the acquired immunodeficiency syndrome (AIDS) stage of HIV infection?
Answer:
The lytic cycle.
Explanation:
HIV is a retrovirus that has a special enzyme called transcriptase reverse, which can synthesize DNA using RNA as a template. This replication system is particularly useful for the virus because the DNA synthesized from the RNA viral genome can be then integrated into the human chromosomes and stay inactive for years. This is called a lysogenic cycle and is characterized by a latency of the virus and an integration to the host DNA.
When there is a triggering event, this latent virus can be excised from the human chromosome and start producing copies of itself using the host machinery. Then the virions are assembled and after that they lyse the host cell and release new infective units that can then infect neighboring cells. This is called the lytic cycle of the virus and is the reproduction cycle that occurs when a person moves into the acquired immunodeficiency syndrome (AIDS) stage of HIV infection.
Mitochondria require glucose to convert ADP to ATP. Which of the following statements describes how ADP is converted into ATP?
A. ADP loses a phosphate group which stores energy for use by the cell.
B. ADP gains a phosphate group which stores energy for use by the cell.
C. ADP loses a phosphate group which releases energy for use by the cell.
D. ADP gains a phosphate group which releases energy for use by the cell.
Answer:
B. ADP gains a phosphate group which stores energy for use by the cell.
Explanation:
ADP is converted to ATP for the storing of energy by the addition of a high-energy phosphate group. The conversion takes place in the substance between the cell membrane and the nucleus, known as the cytoplasm, or in special energy-producing structures called mitochondria.
The statement that describes how ADP is converted into ATP is as follows:
ADP gains a phosphate group which stores energy for use by the cell.Thus, the correct option is B.
What is ATP?ATP stands for Adenosine triphosphate. It may be defined as an organic compound that delivers energy to operate many processes in living cells, such as condensate dissolution, muscle contraction, nerve impulse propagation, and chemical synthesis.
ATP is considered a high-energy compound that furnishes immediate energy to the cell for metabolic activities.
ADP gets converted into ATP by gaining one phosphate group which is the most potent high-energy phosphate. This conversion of ADP to ATP generally takes place in the cytoplasm or in the membrane-bound cell organelle known as mitochondria.
Therefore, the correct option for this question is B.
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Which statement about sister chromatids is true? One sister chromatid is inherited from each parent. Sister chromatids are always in every cell. Sister chromatids are only present during cell reproduction. Each sister chromatid forms a lobe of a chromosome.
Answer:
One sister chromatid is inherited from each parent.
Explanation:
Answer:
its C
Explanation:
1980g = __kg
A. 198 B.1.98 C.19800 D.19.8
Answer:
1.98 kg
Explanation:
Which three of the following are examples of feedback mechanisms which help maintain homeostasis?
A antibodies binding to a virus
B flagellar rotation for cell movement
Cinsulin secretion in response to high blood sugar
D Nincresed heart rate in response to exercise
E protein synthesis
F proton pumping to maintain a proper pH level
Answer:
F proton pumping to maintain a proper pH level
3(a). Diagram 3 shows some processes that involve the changes in the
state of matter. Choose the processes that release heat.*
Answer:
C
D
Explanation:
The processes of freezing sublimation releases heat to environment.
Freezing is a phase change by which a liquid changes to solid.
Sublimation is a phase change in which a gas changes to solid.
Phase changes by which a substance returns back to the state of orderliness involves a loss of heat. Sublimation is can be from solid to gas or gas to solid. In the process from gas to solid, heat is released. But from solid to gas, heat is absorbed.So this is a simple yes or no question
In photosynthesis is the water broken down by hydrogen molecules yes or no
1.) What gives water all its properties? 2.) What type of bond joins H2O to another H2O and forms cohesion? 3.) What property of water prevents rapid temperature change inside the body of organism? 4.) Which property of water allows water to attach to roots of plants for capillary action? 5.) Water is found in many compounds such as blood, saliva, sweat because of which property of water? 6.)Which property of water causes water to form drops? 7.)Which property of water helps maintain extreme temperature changes in an area? 8.) What happens to hydrogen bonds when water turns to ice? 9.) Why doesn't water break down fat? 10.)Which property of water causes surface tension? Cohesion, Adhesion, High heat capacity, high heat vaporization and polarity
Answer:
1. polarity
2. hydrogen bonding
3. High heat capacity
4. Adhesion
5. polarity
6. surface tension
7. high heat vaporization
8. hydrogen bonds form a rigid and stable network
9. Water is a polar substance and fat is a nonpolar substance.
10. Cohesion
Explanation:
Water is a polar molecule that is held together by hydrogen bonds to form strong cohesive forces. This accounts for the surface tension in water. Surface tension is the force acting on water that it makes to behave like a stretched elastic skin.
The polarity of water accounts for the fact that it is found in several parts of the body where it largely plays the role of a polar solvent.
High heat capacity of water enables it to function well in the area of thermoregulation in the body. High heat vaporization accounts for the fact that water helps maintain extreme temperature changes in an area.
When in solid state, the hydrogen bonded network in water becomes rigid and forms a very stable network of water molecules. Being polar, water does not interact with fat because like dissolves like.
In plants, the attachment of water to plant roots is known as adhesion and is necessary for the capillary movement of nutrients to plants via the root.
Which of the following statements best describes cellular respiration?
1.Sunlight and carbon dioxide are used to make ATP.
2.ATP and oxygen are used to make sugars and starches.
3.Glucose molecules from food and oxygen are used to make ATP.
4.ATP and carbon dioxide are used to make water and glucose.
Answer:
1.
Explanation:
Sunlight and carbon dioxide are used to make atp
What is the relationship between undisturbed sedimentary rock layers and fossils?
Answer:
A principle of law stating that within a sequence of undisturbed sedimentary rocks, that the oldest layers are on the bottom and the youngest are on the top. rock layers have a unique set of fossil animal and plant remains which can be used to determine the relative ages of rock layers.
Explanation:
jennifer performed an experiment to see how temperature affects the rate of breathing. group A will have their rate of breathing measured in 35 degrees Fahrenheit and group B will have their rate of breathing measured in 70 degrees Fahrenheit. write an "if..then" hypothesis statement
Answer:
If the temprature increases then the rate of breathing will decrease
Explanation:
This is because the increase in body temprature increases the heart rate making it harder to breathe
An interaction in which one organism captures and feeds on another organism is called
a competition
C mutualism
b. symbiosis,
d predation
cellular activity across a cell membrane
Answer:
The plasma membrane is a selectively permeable barrier between the cell and the extracellular environment. Transport of such molecules and ions across all cellular membranes is mediated by transport proteins associated with the underlying bilayer.
Explanation:
A scientist presents the finding from her latest research at a scientific conference. Several scientists in the audience question her analysis. Which of the following is the best response to the criticism?
A) accept the criticism as fact and change the conclusions.
B) refused to speak for the remainder of the conference
C) assume that the criticism is inaccurate and ignore it
D) review the data analysis in light of the criticism
Answer: A
Explanation:
This is a person in a fictional work that does not change during the course of the action.
Answer:
A Static character
Explanation:
Which statement correctly distinguishes the functions of lipids from other types of biomolecules?
Which is a symbol that represents SI units for temperature?
°C
g
Ооос
L
What is the correct answer?
What are the three base sequences on a tRNA molecule called?
Introns
Exons
Codons
Anti-Codons
Answer:
proteins are built from smaller units called and amino acids which are specified by 3 nucleotide mRNA sequences called Codons each Condon represents a particular amino acid and the each condone is recognized by a specific tRNA. have a nice day !!!!!!!
Do we use all brains all the time? If so why?
Answer:
Yes because we use our brain to write, read, draw, drive a car, or pretty much anything we do. Even sleeping our brain is working. But at a slower pace. The brain never stops working.
Explanation:
Translation can best be described as: *
1.making proteins using RNA
2.making new DNA using the old DNA
3.making proteins using DNA
4.making RNA using DNA
docaribedas. *
Answer:
1 is the right answer guaranteed
If something's neural center dies, would you classify its cells as dead?
Answer:
No because only the neural organ died not the cells
4. Why are coral reefs only found in tropical water? *
(1 Point)
They need cold water with little sun
They need deep water and humid temperatures
They require shallow waters where the sun can reach them
Answer:
They require shallow water where the sun can reach them.
How many more cherry pies have 60 to 89 cherries than 90 to 119 cherries?
Answer:
They are the same thing
6 pies are more in 60 to 89 cherries than 90 to 119 cherries, a bar graph is a graphical depiction of information, amounts, or numbers using bars or strips.
How to depict the bar graph?They are employed to contrast and compare various data kinds, frequencies, or other measurements of several categories of data.
The calculation of the bar graph in the given question.
For 60 - 89 cherries there are 10 pies
For 90 -119 cherries there are 4 pies
10 -4 = 6 pies
The image for the graph is attached below.
When displaying sections of data, bar charts should be used. As long as there aren't too many categories to compare, vertical bar charts can be useful for comparing several categories or discrete data, such as age groups, classes, schools, etc. They are quite helpful for time series data as well.
Therefore, there are 6 more pies in the 60 -89 cherries category than in the 90-119 category.
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HELP!!!!!! FIRST PERSON TO ANSWER CORRECTLY GETS BRAINLIEST!
The movement of tectonic plates in two different locations is shown below:
Which statement is most likely true?
An earthquake may in occur in location a and subduction occurs in location b
Subduction occurs in both locations
Subduction occurs in location a and a volcanic eruption may occur in location b
Sea floor spreading occurs in both locations
Answer:
An earthquake may in occur in location a and subduction occurs in location b
When a food handler can effectively remove soil from equipment using normal methods, the equipment is considered what?
Answer:
Cleanable
Explanation:
Cleanability refers to the ease with which microorganisms or particles can be removed from the equipment used in food production. To be cleanable the roughness of the machine being employed in production is not expected to exceed 0.8μm.
The Atomic Force Microscope is used to measure the surface roughness of machines. Cleanability is important as it ensures that the machines used in food production are safe.
When a food handler can effectively remove soil from an equipment by using normal methods, the equipment is considered to be; Corrosion Resistant.
The soil referred to her would be dirt because we are talking about a food handler.
Now, if the food handler is finding it difficult to remove dirt from the equipment by using normal/regular methods, it means that the soil/dirt has succeeded in having some kind of chemical reaction with that equipment.If that is the case, then it means the equipment is undergoing corrosion because corrosion is defined as the gradual destruction of a metal by chemical reaction with the environment.Since we have established that inability to use normal method denotes corrosion, then if he can use normal methods to remove the soil effectively, then the equipment is said to be corrosion resistant.Read more at; https://brainly.in/question/40223031
Pea plant clones are given different amounts of water for a three-week period. First pea plant receives 400ml. Second pea plant receives 200ml. Third pea plant receives 100ml. Fourth pea plant does not receive any extra water; the plant only receives natural ways of receiving water. The height of the pea plants is recorded daily. What is the independent variable?
A) the different amounts of water
B) the heights of the pea plant
C) the pea plants
D) the natural ways of receiving water
Answer: The independent variable is the different amount of water. The correct option is A.
Explanation:
A variable can represent age, a person, or an entity that can be measured. In statistics, it is simply defined as an attribute of an object to be investigated. There are different types of variables these includes:
--> Dependent variable and
--> Independent variable.
Dependent variables are simply the variables that are affected by the changes that occurs in the experiment. From the experiment they should include:
--> the height of the plant,
--> the size of the plant,
--> the number of leaves
---> if the plant survived or not (dead).
Independent variable are the variables that are changed in the experiment. A good example from the pea plant experiment is WATER. It is the aspect that is used to alter the dependent variable which is the height of the pea plant. I hope this helps, thanks!
it for dreelliot 1/2 divided by 1
write a food chain from this food wed with six tropic levels
Answer:
Pri mary Prod ucers
Prim ary Con sumers
Secondary Consum ers
Te rtiary Consumers
Ap ex Pred ators
Trophic casc ade?
(i put lines because it says that i'm using "inappropriate" words.)