Answer:
option d is correct. the existence of land bridges between continents.
Explanation:
landland bridge theory which was used to explain why species would end up continents over, such as mammoth travelling to North America, thisthis theory was based on the idea that water eventually Rose to cover these bridges rather than the at having individual plates that moved away from each other.
How is a clade differentiated from another clade
Answer:
A clade is a grouping that includes a common ancestor and all the descendant species of that ancestor. Clades are differentiated visually based on where they branch off from one another.
Explanation:
A clade is a grouping that includes a common ancestor and all the descendants (living and extinct) of that ancestor. Using a phylogeny, it is easy to tell if a group of lineages forms a clade. Imagine clipping a single branch off the phylogeny — all of the organisms on that pruned branch make up a clade.
Clades are nested within one another — they form a nested hierarchy. A clade may include many thousands of species or just a few. Some examples of clades at different levels are marked on these phylogenies. Notice how clades are nested within larger clades
Answer:
A clade is a monophyletic grouping in which all the organisms stem from the same branching point.
Explanation:
The organisms in a clade must all stem from the same branching point in evolutionary history, as represented in the phylogenetic tree.
Help Please
In 1887 a strange nerve disease attacked the people in the Dutch East Indies. The disease was beriberi. Symptoms of the disease included weakness and loss of appetite, victims often died of heart failure. Scientists thought the disease might be caused by bacteria. They injected chickens with bacteria from the blood of a group of chickens that were not injected with bacteria. One of the scientists, Dr. Eijkman, designed a new experiment based on his own observations. Before the experiment, all the chickens had eaten wholegrain rice, but during the experiment, the chickens were fed polished rice. Dr. Eijkman researched this interesting case and found that polished rice lacked thiamine, a vitamin necessary for good health. 1. State the question or problem that Dr. Eijkman investigated. 2. What was the original hypothesis? 3. What was the manipulated (independent) variable and the responding (dependent) variable? 4. Write a statement that summarizes the results of the experiment. 5. How would Dr. Eijkman test his new hypothesis?
When conducting an experiment, you need to have a question or a problem such as what is the cause of the disease. Then, you need to state a hypothesis to make a prediction, like the disease was caused by bacteria. You also need to define the variables involved in the experiment: independent -such as the infected blood used to inject chickens-, dependent -like the chickens response to the infected blood-. Then, according to the results -for instance, the experimental and the controlled groups were equally affected by the disease-, you can accept or reject your original hypothesis. During the experiment there will surge new questions to answer, and new hypothesis to test. In the exposed example, for instance, Dr. Eijkman can test his new hypothesis by injecting bacteria to a group of animals fed with wholegrain rice, and to another group of animals fed with polished rice.
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When conducting an experiment, there are different aspects to consider, such as the question that drives to the reseach, the hypothesis, theoretical framework, variables involved -independent, dependent, and controll-, methodology, study groups, data analisys, among others.
You need to consider,
• Definition and problem statement. The question for which there is not an answer yet.
• Hypothesis formulation. A hypothesis is a scientific conjecture, not verified, that requires corroboration.
• Data collection and analysis. This step involves testing the observations.
• Results
• Verification of hypothesis. This step involves the deriving of the working hypothesis.
• Discussion and Conclusion.
Available data:
Scientists thought that the beriberi disease might be caused by bacteriaA group of healthy chickens were injected with bacteria and became sickA group of chickens that were not injected with bacteria also got sickBefore the experiment, all the chickens had eaten wholegrain riceDuring the experiment, the chickens were fed polished ricePolished rice lacked thiamine, a vitamin necessary for good health1. The first question made was What is the real cause of the beriberi disease?
2. The original hypothesis was that the disease was caused by a bacteria, and if so, healthy chickens injected with infected blood, would also get the disease.
3. The manipulated or independent variable was the infected blood used to inject the chickens. The responding or dependent variable was the reaction or response of the chickens to the injected blood.
4. Results: Both, the experimental and the controlled group, were equally affected by the disease. Even when the controlled group was not injected with the affected blood, it got the disease too.
5. Dr. Eijkman new hypothesis is that chickens fed with polished rice will get sick because of the thiamine lack. He can test this new hypothesis by injecting bacteria to a group of animals that are being fed with wholegrain rice that has all the necessary vitamins, and injecting bacteria to another group of animals being fed with polished rice that lacks thiamine. If the new hypothesis is correct, the first wholegrain rice group should resist the bacteria attack, while the second polished rice group should get the disease.
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Beri-beri is a disease resulting from a lack of vitamin B1 in the human body. This condition occurs, in particular, in people who eat mainly white rice (rice without shell) and some other types of grain crops. In modern society, the disease is rare due to the fact that a sufficient amount of vitamins comes from food.
Vitamin B1 contributes to the normal course of carbohydrate and fat metabolism. Its deficiency leads to the accumulation of pyruvic acid in the human blood and its increased concentration in the nervous system. The consequence of such a biochemical metabolic disorder is damage to the nervous system ("dry beriberi"), as well as damage to the cardiovascular system ("wet beriberi").
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How would you explain that the geological processes occurring today are similar to geological processes that took place a long time ago?
Answer:
Geological processes" are defined as the natural forces that changes the shape of Earth. Several geological processes include erosion, sedimentation and chemical weathering that affect the Earth’s surface.
So, the geological processes such as plate tectonics and erosion et-cetra are occurring long time and still occurring in the Earth environment.
In
blood is composed largely of water, which helps to transport
nutrients and gases.
PLASMA
Plasma is the main component of blood and consists mostly of water, with proteins, ions, nutrients, and wastes mixed in.
hope this helps
Answer:
Plasma
Explanation:
Plasma is usually given to trauma, burn and shock patients. It helps boost the patient's blood volume, which can prevent shock, and helps with blood clotting. It is also the single largest component of human blood, comprising about 55 percent, and contains water, salts, enzymes, antibodies and other proteins.
Hemophilia is an X-linked recessive disorder.
A Punnett square is shown. The columns are labeled Upper X h and Upper Y. The rows are labeled x Upper H and x h.
What is the probability of having hemophilia for the cross that is shown in the Punnett square?
0 percent
25 percent
50 percent
75 percent
Answer:
It is 50% chance that a daughter has hemophilia because the question is What percent chance a daughter has it,so out of the two possible genotype for a girl , one of them will be a carrier of hemophilia and the other will exhibit the disease making it a 50% or 1/2 chance
Explanation:
Hemophilia is an X-related recessive hereditary sickness that classically impacts men because of the presence of the most effective X chromosome in adult males. females are commonly vendors because of the presence of counterpart X chromosome, however, oftentimes manifestations of hemophilia are seen in heterozygous provider women.
If the son gets his mom's X chromosome with the hemophilia gene he may have hemophilia. If he inherits his mom's different X chromosome, he will have everyday blood clotting. So a provider's son has a 50% risk of getting hemophilia.
That's an X-connected recessive ailment?
Examples of X-related recessive situations include purple-inexperienced color blindness and hemophilia A: red-green color blindness. crimson-green color blindness in reality manner that a person can not distinguish sun shades of purple and green (generally blue-green).
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CH3OH + HOCH3 = CH3-O-CH3 + HOH Is this reaction an addition reaction or a dehydration reaction or synthesis or whatever? A. Addition B. Dehydration Brainliest for the correct answer. Pls help
Answer:
B. Dehydration
Explanation:
Addition reaction is defined as the chemical reaction in which two different compunds combine together to form a new compund.
Dehydration reaction is defined as the chemical reaction in which water molecule (H2O) is removed from the reactant.
For example: RCO2H + R′OH ⇌ RCO2R′ + H2O
In the given equation: CH3OH + HOCH3 = CH3-O-CH3 + HOH
The reaction is showing dehydration because two molcules are combined aand water molecule is eliminated from the reactant.
Hence, the correct option is B. Dehydration.
Easy question!!!!!
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plz help!!
just write the letters of the correct parts.
Pls answer correctly.
Urgent!!
Answer:
h is cornea
a is choroid
c is retina
f is iris
d is optic nerve
A cell membrane is very specific about what It allows across. How does this help the
cell?
XO A. It helps the cell absorb as many different molecules as possible.
O B. The cell works better when it contains fewer proteins.
C. Transport proteins allow only enzymes to pass through the membrane.
D. It is better for the cell if most molecules are prevented from entering.
Incorrect
It isn’t A
The description below is about a community in a poor country in need of certain basic
necessities.
A village has no running water and no electricity. They have farms that are watered by
frequent rainstorms. With no electricity, they cannot use modern technology to improve
their lives.
One group thinks the village should install windmills to provide electricity. What is the
biggest problem with this plan?
O A. Windmills do not work in areas with rainfall.
XO B. The village should work on raising their fertility rate first.
O C. Electricity would lead to a higher carrying capacity.
D. The village may not have money for windmills.
The biggest problem with the plan of installing windmills to provide electricity in the village is the village may not have money for windmills. Therefore option D is correct.
Installing windmills requires financial resources, including the initial cost of purchasing and installing the windmills, as well as ongoing maintenance and operational expenses.
In the given description, the village is described as being in a poor country and lacking basic necessities. It is unlikely that they would have the necessary funds to invest in windmills, considering their current situation.
Therefore, the lack of financial resources becomes a significant obstacle in implementing this plan.
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When a plant is receiving the
maximum amount of light
intensity that it can withstand,
what happens to the rate of
photosynthesis?
A. The rate levels off.
B. The rate increases.
C. The rate decreases.
Answer:
A. The rate levels off
Question 17 of 50
2 Points
Which type of selection is the most likely to result in Speciation?
A. Stabilizing selection
B. Directional selection
OC. Disruptive selection
D. Artificial selection
Reset Selection
Answer:
C. Disruptive selection
Explanation:
Disruptive selection, also called diversifying selection, describes changes in population genetics in which extreme values for a trait are favored over intermediate values. In this case, the variance of the trait increases and the population is divided into two distinct groups. Two separate groups emerge.
Directional selection most likely to result in speciation. The correct option is B.
What is speciation?Speciation is the process by which a new plant or animal species emerges. When a group within a species separates from other members of its species, it develops its own distinct characteristics.
Speciation is the evolutionary process by which new and distinct species emerge. Species evolve through genetic modification. The new species is reproductively isolated from the previous species, which means it cannot mate with it.
Apple maggot flies - Originally only laid eggs on hawthorn apples, apple maggot flies now lay eggs on both hawthorn apples and other domestic apples in the United States.
The speciation is caused by one of the reason known as directional selection.
Thus, the correct option is B.
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Which correctly lists the three types of rock particles that make up soil? A. air, clay, and sand B. clay, water, and silt C. sand, clay, and silt D. silt, water, and air answer C.sand, clay, and silt
Answer:
option.c
Explanation:
It is correct
The three types of rock particles that make up soil are sand, clay, and silt. Thus, the correct option is C.
What are Rock particles?Rock particles may be defined as those particles that are formed by the weathering of sedimentary rocks and construct small tiny particles.
In the production of soil, water molecules and atmospheric air are not required significantly. The gathering of tiny rock particles constitutes the formation of soil.
Therefore, the correct option is C.
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Which of the following organelles
contains the genetic information
which is passed down from one
generation into the next?
A. The nucleus
B. The nucleolus
C. The chromosomes
D. The nuclear membrane
The nucleus, contains the genetic information which is passed down from one generation into the next.
What structure in a cell contains the genetic information?Nucleus. The nucleus serves as the cell's command center, sending directions to the cell to grow, mature, divide, or die. It also houses DNA (deoxyribonucleic acid), the cell's hereditary material.
Thus, option "A" is correct.
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What is the role of a cytoskeleton?
Answer:
B is the correct answer
how does an increase in available food increase genetic diversity?
Answer:
more food means more of the species would stay alive longer so that would mean obviously more mating and mutations.
Explanation:
PLEASE HELP!!!!!!!!!!!! WILL MARK BRAINLIEST
Many cruise ships use advanced wastewater treatment technologies to treat sewage before they discharge it into the sea. Is the use of non-GMO bacteria to clean this water, as opposed to using chemical additives like chlorine, an example of biotechnology? Why or why not?
This is an example of biotechnology because it seeks to solve a societal problem using biological entities.
This is an example of biotechnology because metabolic activity of any organism is considered biotechnology.
This is not an example of biotechnology because it isn't new, people have been using bacteria to treat wastewater for years.
This is not an example of biotechnology because the bacteria are not genetically modified.
Answer:
This is an example of biotechnology because it seeks to solve a societal problem using biological entities.
Explanation:
I don't really have an explanation but basically, your solving a societal problem and to solve it your using biological entities.
I hope this helps!
(And also, i really don't care about being marked as Branliest. You can do it if you want but i just help people because i like it :)
What ecosystem concept is
illustrated by symbiotic
relationships?
A. natural selection
B. interdependence
C. competition
Maria has just obtained her driver's license. She is nervous that she might break one
of numerous "rules of the road" and receive both a ticket and a reprimand from her
parents. Which component of Freud's Psychodynamic Theory does this reflect?
a) ego
b) unconscious
c) id
d) superego
Answer:
Ego
Explanation:
The relationship between abiotic and biotic environment is called ________. a)Biodiversity b)Ecosystem c)Symbiosis d)Survival
the relationship between abotic and biotic environment is called ecosystem.
Refer to the tree of life shown above. What can you conclude about fungus?
Answer:
D
Explanation:
fungi are more closely related to bacteria than to archea
Easy Question. Will Mark Brainliest The human population has increased dramatically in the last 200 years. How does human population increase affect aquatic resources? The growing human population increases the availability of aquatic resources. As the human population goes up, the use of aquatic resources goes down. Humans do not use aquatic resources, so there is no effect. Humans use more aquatic resources as the population increases.
Answer:
Yeah. As the population increases, we will need more water to drink. So, Humans use more aquatic resources as the population increases.
Explanation:
Answer:
Humans use more aquatic resources as the population increases
Explanation:
You're working in the Rainforest and discover a new species. You get to name the species. What must be included in this name and how is it?
Answer: The name must include the genus and species of the new organism. [It must be written in italics with the species name lowercase]
The organisms that push carbon to the bottom of the ocean are known as what? Why is this important to the ecosystem?
Answer:
Phytoplankton.
Explanation:
Phytoplankton, which is Greek for "drifting plants" are microscopic, one-celled organisms that drift in the sunlit areas in the oceans and they are key to bringing carbon down into the ocean biological pump from the atmosphere via the process of photosynthesis.
Phytoplankton are super important! They generate about 50% of the atmosphere's oxygen, which is the same amount as all land plants combined. They also form the base of virtually every ocean food web. In short, phytoplankton makes other ocean (and land) life possible.
Which zone is most likely to be home to algae?
O A. Benthic
O B. Limnetic
O C. Profundal
O D. Aquifer
Answer: Limnetic
Explanation: your answer if you’re on 2.1.4 quiz for envio. Science
pls help
will give the brainliest
please answer correctly.
Answer:
A=Cornea
B=Retina(rods and cones)
C=Sclerotic
D=Iris
E=Optic nerve
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Describe the pathophysiology
Humans are actually producing more carbon dioxide than natural sources can absorb. That means the atmosphere is not at a steady state. Scientists and engineers are researching ways to remove carbon from the atmosphere faster than the current rate. This process is called carbon sequestration. If humans increase their rate of carbon emissions but also increase the rate of carbon sequestration by the same amount, what effect will that have on the residence time of carbon dioxide in the atmosphere? What effect will it have on the total amount of carbon dioxide in the atmosphere?
Answer:
no effect on the atmosphere
Nigerian way
Answer:
What effect will that have on the residence time of carbon dioxide in the atmosphere?
Individual Carbon Dioxide molecules will be in the atmosphere for less time as it is rapidly being cleared and produce.
What effect will it have on the total amount of carbon dioxide in the atmosphere?
None, because humans are producing more as they remove it.
Easy Question. Will Mark Brainliest.
Many cruise ships use advanced wastewater treatment technologies to treat sewage before they discharge it into the sea. Is the use of non-GMO bacteria to clean this water, as opposed to using chemical additives like chlorine, an example of biotechnology? Why or why not?
This is an example of biotechnology because it seeks to solve a societal problem using biological entities.
This is an example of biotechnology because metabolic activity of any organism is considered biotechnology.
This is not an example of biotechnology because it isn't new, people have been using bacteria to treat wastewater for years.
This is not an example of biotechnology because the bacteria are not genetically modified.
Answer:
This is an example of biotechnology because it seeks to solve a societal problem using biological entities.
You wish to study the impact of synthetic estrogen like hormones on the health of whales (and people). Select the organism from the table below that would be best to use in your research. Why did you select this organism?
Model Organism Characteristics
Yeast------------------Single celled, eukaryotic (contains a nucleus)
Fruit fly---------------Multicellular, eukaryotic, invertebrate, arthropod
Zebrafish-------------Multicellular, eukaryotic, vertebrate, fish
Mouse-----------------Multicellular, eukaryotic, vertebrate, mammal
Fruit flies, because they are multicellular like whales
Mouse, because they are mammals like whales
Yeast, because they are eukaryotic like whales
Zebrafish, because they live in the water like whales
Answer:
Because humans are multicellular, eukaryotic (contains a nucleus), vertebrates, and mammals, the best organism to test the synthetic hormones on would be a mouse.
Explanation:
Humans and whales are multicellular (they have many cells) and their cells are eukaryotic (contain a nucleus). They also have a backbone (spinal column), which makes them a vertebrate. Finally, all humans and whales are mammals. Therefore, to get the best results, the testing should be performed on a mouse.
Performing the experiment on yeast would give good results for singular-celled organisms, like protozoa.Performing the experiment on a fruit fly would give good results for multicellular invertebrates, like spiders.Performing the experiment on zebrafish would give good results for all fish in general.The process in which individual organisms change during their lifetime is....
The Life Cycle
Hope that helped!!! k
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