Answers
Circulatory System: The earthworm has a closed circulatory system. An earthworm circulates blood exclusively through vessels. There are three main vessels that supply the blood to organs within the earthworm. These vessels are the aortic arches, dorsal blood vessels, and ventral blood vessels.
Digestive System: The digestive system is partitioned into many regions, each with a certain function. The digestive system consists of the pharynx, the esophagus, the crop, the intestine and the gizzard.
Hope this helped.
Related Questions
why Guainen (G) is always paired with cytosine (C) with triple bond and so Adenine with Thymine with double bonds?
Answers
Answer:
In DNA and RNA, guanine forms three hydrogen bonds with cytosine. Three bonds are formed between these bases as a result of the fact that guanine possesses two nitrogen and one oxygen atoms that can form hydrogen bonds. Given the spatial restrictions of the double helix, which call for there to be one purine and one pyrimidine in each base pair, A always pairs with T and G always pairs with C as these are the only combinations that for hydrogen bonding to take place.
21. Some fish, some dogs and some children are swimming in a bay. There are 40 legs in total, twice as
many heads as tails and more dogs than fish.
How many fish are in the bay?
Answers
why bone grow in bidirectional
Answers
Explanation:
Bones grow in different directions because they need to support the body in different ways. The different directions allow for flexibility and strength.
What factors most influence your food choices for meals and snacks? How important are these in your food choices?
Consider personal preferences, physical health, family history, nutritional needs
Answers
The factors most influence your food choices for meals and snacks: Nutrition, Hunger, Appetite, Personal Taste, Availability, Time & Convenience, Geography/Climate/Environment, Family & Culture.
What is food choice?Food selection refers to how people decide what to buy and consume. Food choice is influenced by a complex set of factors that vary from person to person and are influenced by culture, heritage, and upbringing. We might look for price if we're on a tight budget, or allergen information if we have a food allergy. The mind will process feelings of hunger or satiety and work on stimulating appetite, which in turn influences food choice based on an individual's last meal, activity, mood, and other similar factors. Food's palatability will also influence its consumption. This refers to the taste, smell, and appearance of the food.
Here,
Nutrition, Hunger, Appetite, Personal Taste, Availability, Time & Convenience, Geography/Climate/Environment, Family & Culture are the factors that most influence your food choices for meals and snacks.
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one mechanism for the biological evolution of today's gray wolf is a process through which organisms with favorable traits are more likely to reproduce than competitors. this nonrandom mechanism works only if exist in the population. or random error during dna replication, is another evolutionary mechanism that affects the gray wolf's evolution. random errors may result in beneficial, neutral, or harmful phenotypes in individuals. today's gray wolf has evolved over time, as expected because of the complexity of its genetic material and its reliance on sexual reproduction.
Answers
Yes, that is correct. The mechanisms you described, natural selection and genetic drift, are two of the main mechanisms of biological evolution that have shaped the evolution of the gray wolf.
Natural selection favors organisms with advantageous traits, while genetic drift, or random fluctuations in the frequency of alleles, can lead to changes in the frequency of genetic traits in a population. These mechanisms, along with mutation, have contributed to the genetic diversity and evolution of the gray wolf over time. The combined effect of natural selection and genetic drift has allowed today's gray wolf to evolve over time.
Its complexity of its genetic material and reliance on sexual reproduction has allowed it to benefit from both of these evolutionary mechanisms and become more adapted to its environment. The biological evolution of today's gray wolf is a complex process that is made up of multiple mechanisms that contribute to its survival. One mechanism for the biological evolution of the gray wolf is natural selection.
Natural selection is a nonrandom process whereby organisms with favorable traits are more likely to reproduce than competitors. This nonrandom mechanism works by allowing selective pressures to act on the population, leading to changes in the gene pool over time. For example, if a population of gray wolves is living in an area where the environment is harsh, those individuals that possess traits that help them survive and reproduce in this environment are more likely to pass on their genes to the next generation. As a result, the average phenotype of the population will become more adapted to the environment over time.
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The energy is stored in the starch molecule
Answers
Sorry if I get this wrong lol
IOO POINTS + BRAINLIEST (BRAINLIEST if right)
What can you infer about individuals 1 and 2 in generation I?
What can you predict about the genotype of individuals 1 and 2 in generation II?
Do you think this trait is dominant or recessive? Why?
Do you think this is autosomal or sex-linked? Why?
Answers
a. individuals 1 and 2 in generation could be either carriers of a recessive trait or individuals without the trait.
b. We can predict that they could potentially be carriers of the recessive allele.
c. The trait is present in every generation and affects both males and females, hence a dominant trait.
d. The trait is present in both males and females equally and more likely to be autosomal.
How do we explain?Based on general principles of inheritance, we have that :
a) Inference about individuals 1 and 2 in generation I:
This is a simple pedigree without any notable traits or patterns, so the individuals 1 and 2 in generation could be either carriers of a recessive trait or individuals without the trait.
b) Prediction about the genotype of individuals 1 and 2 in generation II:
We have seen that the trait is recessive and both individuals 1 and 2 in generation I do not exhibit the trait, they could potentially be carriers of the recessive allele and a possibility for them to pass on the trait to their offspring in generation II.
c) Trait dominance:
Since the trait is present in every generation and affects both males and females, it may suggest a dominant trait.
d) Autosomal or sex-linked nature:
The trait is present in both males and females equally, it is more likely to be autosomal. Sex-linked traits are typically associated with a gender bias, where they are more commonly observed in one gender.
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during times without sunlight, the pv system draws energy from
Answers
During times without sunlight, the PV system draws energy from batteries or from the grid.
Photovoltaic (PV) systems, which convert sunlight into electricity, typically include a set of solar panels, an inverter to convert the DC electricity produced by the panels into AC electricity that can be used by appliances and the grid, and a battery system to store excess electricity generated during the day for use at night or during periods of low sunlight.
During periods of low sunlight, such as at night or on cloudy days, the PV system draws energy from the battery system to power appliances and the grid. If the battery system is depleted, the PV system can also draw energy from the grid to meet demand.
In this way, PV systems can provide reliable and renewable electricity even during periods of low sunlight. However, the size and capacity of the battery system and the availability and cost of grid electricity can affect the overall reliability and cost-effectiveness of the system.
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blood type B
multiple choice
can donate to AB and B
has anti-B antibodies
has anti-A antibodies
can't have blood type A transfusion
Answers
Answer:
Has anti-A antibodies
Explanation:
This is because the liquid, a part of your blood while not cells (serum) is mixed with blood that's defined to be blood type and type B. individuals with type A blood have anti-B antibodies. people with type B blood have anti-A antibodies.
Hope it helps!
A group of students decided to carry out an Investigation to find out how enzyme
activity is affected by temperature changes. They put samples of salivary amylase and
starch into two test tubes. Salivary amylase is an enzyme that breaks down starch
into maltose. Its optimum temperature for activity is around 37°C.
A. What do you think happened to the rate of reaction of the enzyme when the students had the
1st test tube at 37 degrees?
B. What do you think happened to the rate of reaction of the enzyme when the students had the
2nd test tube at 0 degrees? At 60 degrees
I
Answers
Answer:
See the answer below
Explanation:
Enzymes are biological catalysts and are quite temperature specific. They operate optimally within a certain range of temperature. At lower temperatures, their activities decrease and they become inactive at extremely low temperatures. At higher temperatures, their activities are initially promoted but as temperatures get higher, their activities become zero due to the fact that they become denatured.
A. The optimum temperature for amylase activity is 37\(^oC\), hence, when the student had the first test tube at this temperature, the rate of reaction of the enzyme is optimal. The maximum amount of starch would be broken down into maltose.
B. At 0 degrees, the enzyme would become inactive and the rate of reaction becomes minimal or even zero due to the inactivity of the enzyme. At 60 degrees, the rate of reaction also becomes zero because the enzyme would have been denatured by the high temperature.
Enzymes depends on temperature to accomplish their functions and express the highest rate of reaction. A) 37ºC ⇒ maximum rate of reaction. B) 0ºC ⇒ low or null rate of reaction. C) 60ºC ⇒ null rate of reaction.
-----------------------------------
Enzymes, like all proteins, are polypeptidic molecules. They need to get an accurate tridimensional structure to accomplish their function. There is a limited temperature and pH level at which they lose that structure and denaturalize. In general, the increase in temperature accelerates chemical reactions. For every 10ºC of temperature increase, the reaction velocity duplicates. The temperature at which the enzymatic activity is the highest is known as optimum temperature.⇒ When the environmental temperature is lower than the optimum, there is a slow enzymatic activity.
⇒ When the temperature exceeds the optimum point, the enzymatic activity sharply decreases.
Hight temperature denaturalizes the enzyme.
Over the optimum temperature level, the reaction velocity is counteracted by the loss of the catalytic activity due to denaturalization.
Enzymatic activity decreases until it completely annulates.
According to this information, under the stated situations, we expect to see
A). 1st Test tube at 37 degrees
The enzyme can express its maximum rate of reaction because it is under the optimum temperature. The enzyme activity is the highest.
B). 2nd Test tube at 0ºC
Low rate of reaction because the temperature is lower than the optimum one.Products are being produced but at a lower rate because the enzymatic activity is low or null. The enzyme has not reached its highest activity rate yet.
C). 2nd Test tube at 60ºC
Low rate of reaction because the temperature exceeded the optimum one. At 60ºC the enzyme suffers denaturalization, and it can not accomplish its functions. The enzymatic activity is null.The attached graph shows
an increase in the rate of reaction from near zero to a maximum rate of reaction -at 37°C-. 37°C is the optimum temperature at which the enzymatic activity is the highest. From 37°C to 60ºC there is a sharp decrease in the enzyme activity due to the protein denaturalization.---------------------------------
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(Q001) Review the photos in the Lab 7 Exercise Image Library on p. 217 of your lab manual and answer the following questions. PART A Which of the skeletal elements is human?
Answers
The skeletal system of human is composed of four main connective tissues i.e. bones, ligaments, tendons, and joints.
Bone is composed of collagen and calcium phosphate. Collagen is a protein that provides a soft framework to the skeleton, whereas calcium phosphate is a mineral that provides strength to the framework. Ligaments are the bands of tough elastic tissue that are present around your joints.
These ligaments connect one bone to another bone. A tendon is a type of fibrous connective tissue which attaches the muscle to bone. The area or region where two or more bones meet with each other is called joint so we can say that skeletal system is composed of bones, ligaments, tendons, and joints.
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What is the function of the system shown below? *
A. The nervous system removes waste from the body.
B. The nervous system excretes hormones to control
C. The nervous system protects and supports the organs and provides a framework the muscles use to support movement.
D. The nervous system gathers and interprets information and sends messages throughout the body.
Answers
Answer:
C. The nervous system protects and supports the organs and provides a framework the muscles use to support movement.
Explanation:
What is the independent segregation of genes on different chromosomes during gamete formation?A) Gene differentiationB) Gene segregationC) Law of independent assortmentD) Law of gene segregation
Answers
Mendelian genetics
The law of independent assortment establishes that the alleles of two or more different genes are distributed independently of one another in the formation of gametes. In other words, the allele of a gene that is received by a gamete does not influence the allele that another gamete receives. Therefore, the correct answer to this question is option C.
Base your answers to questions 1 through 3 on the diagram below and on your knowledge
of Earth science. The diagram represents the expansion of a portion of the universe from its
origin until the present. The timeline represents billions of years. Letter X indicates two
celestial objects.
Timeline (billion years ago)
Present T
5-
10-
Origin of
Universe
15-
1. Two pieces of evidence that support the theory that the universe is expanding are the
A) red shift of light from distant stars and the existence of nuclear fusion
B) red shift of light from distant stars and the existence of cosmic background
radiation
C) blue shift of light from distant stars and the existence of nuclear fusion
D) blue shift of light from distant stars and the existence of cosmic background
radiation
polestial objects labeled X are
Answers
The two pieces of evidence that support the theory of the expanding universe are the red shift of light from distant stars and the existence of cosmic background radiation.
The correct answer is option B.
1. Red shift of light from distant stars: The observation of redshift in the light coming from distant galaxies provides evidence for the expansion of the universe. Redshift occurs when the light waves from an object moving away from an observer are stretched, causing a shift towards longer wavelengths. This phenomenon is consistent with the Doppler effect, where the wavelength of light appears to stretch as the source moves away. The redshift of light from distant stars indicates that galaxies are moving away from us and from each other, supporting the idea that the universe is expanding.
2. Existence of cosmic background radiation: The discovery of cosmic background radiation further supports the theory of the expanding universe. Cosmic background radiation is a faint, uniform microwave radiation that permeates the entire universe. It is believed to be residual radiation from the Big Bang, the initial event that is thought to have initiated the expansion of the universe. The presence of cosmic background radiation provides strong evidence for the hot, dense early stages of the universe and its subsequent expansion.
Based on the information provided in the diagram, it is not possible to determine the identity or nature of the celestial objects labeled X. The diagram only represents the expansion of the universe over time and does not provide specific details about individual celestial objects.
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Type the correct answer in the box. Spell all words correctly.
What is a close relationship between two organisms that live together called?
The close relationship between two organisms that live together is called
Reset
Next
Answers
Answer:
symbiosis.
Explanation:
The term that you are referring to is symbiosis. (a symbiotic relationship)
Symbiosis is a proximate and often long-term interaction between two or more different biological species.
what evidence from the graph above, suggests that carrying capacity might be lower in Pilanesburg
Answers
Answer:
Could be given effective predator-proof fencing to reduce edge,stocked at ecology carrying capacity
Explanation:
Hope this would be useful
When human undergo anaerobic respiration , they
Answers
When humans and other animals lack sufficient oxygen, they'll create ATP through a form of anaerobic respiration that produces lactic acid as a byproduct. ... Yes 'Anaerobic' means 'without oxygen. Cells will produce ATP through lactic acid fermentation only under when they lack sufficient oxygen.
Answer:
They experience sore muscles
Explanation:
Have a nice day lol <3
this molecule is split into oxygen
protons, and electrons during light
dependent reactions is called?
Answers
Answer:
Oxygen and hydrogen ions are also formed from the splitting of water. To replace the electron in the reaction center, a molecule of water is split. This splitting releases an electron and results in the formation of oxygen (O2) and hydrogen ions (H+) in the thylakoid space.
Robert Hooke used a microscope to see that cork looked like it was made of little boxes. Anton van Leeuwenhoek saw tiny cells swimming in pond water. Which part of cell theory do these observations best support?
A.Cells come from other cells.
B.All organisms are unicellular.
C.Cells are the basic unit of life.
D.All organisms are multicellular.____
23. Which of the following characteristics do all unicellular organisms share?
A.
All unicellular organisms reproduce.
B.
All unicellular organisms have a nucleus
C.
All unicellular organisms eukaryotes
.D.
All unicellular organisms prokaryotes.____
24. Which term describes “one or more cells that carry out all of the processes needed to sustain life”?
A.DNA
B.organism
C.organelles
D.cytoplasm____
25. DNA is genetic material that provides instructions for all cell processes. Where is the DNA located in prokaryotes?
A.in the nucleus
B.in the cytoplasm
C.in the flagella
D.in membrane-bound organelles
Answers
Answer:
just tryna get points lol
A hetero gous ail yellow plant is crossed with a homorygous short green. Show the genoype od phenotypes of the Fi offspring and the probability of each.
Answers
The genotype of the F1 offspring is YyTt, and the phenotype is yellow and tall. The probability of each phenotype in the F1 offspring is as follows yellow and tall is 1/2 or 50%, green and short is 1/2 or 50%.
The genotype and phenotype of the F1 offspringGenotype refers to the genetic makeup or combination of alleles present in an organism, while phenotype refers to the observable traits or characteristics expressed by an organism. Genotype represents the genes an organism carries, while phenotype represents the physical or observable features resulting from the interaction between genotype and the environment.
When a heterozygous ail yellow plant (genotype Yy) is crossed with a homozygous short green plant (genotype tt), the F1 offspring will have the genotype YyTt and the phenotype of yellow and tall. The probability of this phenotype occurring in the F1 generation is 50%. Additionally, there is a 50% probability of the F1 offspring having the phenotype of green and short.
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Photosynthesis and cellular respiration form direct ______ reactions.
Answers
Answer:
photosynthesis and cellular respiration form direct opposite reactions
Photosynthesis and cellular respiration form direct opposite reactions.Photosynthesis is the anabolic process and cellular respiration is the catabolic one.
What is the place for photosynthesis ?It takes place in the leaves where the chloroplasts have the cells that are undergoing the reactions where the food is synthesized.
Photosynthesis is the process by which plants prepare their food and it takes place in the presence of sunlight with the help of water and with the help of carbon dioxide it forms photosynthesis process where the reaction takes place.
Cellular respiration is the chain of reactions that are taking place in the cells where the reactions are taking place in the mitochondria and the chloroplasts and the reactions that are corresponding with each other.
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which of the following is not a protist?
a. paramecium
b. amoeba
c. plasmodium
d. yeast
Answers
one way in which stigma is adapted for reproduction in plants
Answers
Answer:
In a flower, this landing zone and entrance is the stigma. It plays a pivotal role in reproduction. Most stigmas are adapted to trap pollen with hairs, flaps and other surfaces to increase their efficiency. Most stigmas are covered with a waxy, sticky substance.
Astronauts must be protected from extreme heat while reentering Earth's atmosphere. Scientists can use the engineering design process to help make reentry safer. You have defined the problem as a need for heat shields to be stronger. You have tested several new heat shield prototypes and found one that solves the problem. What should be the next step in your process? OA. Brainstorm multiple possible solutions to the design problem. B. Communicate the solution to everyone working on the project. C. Identify the criteria your solution must meet D. Build and test a prototype designed to meet the project criteria
Answers
The next step in the engineering design process, based on the given scenario, would be C) Identify the criteria your solution must meet.
After finding a heat shield prototype that solves the problem of needing stronger heat shields, it is important to clearly define the criteria and specifications that the solution must meet. This involves identifying the specific requirements and constraints for the heat shield design, such as durability, weight, thermal resistance, and other factors necessary for the successful reentry of astronauts.
By establishing these criteria, it becomes easier to evaluate the effectiveness of the chosen prototype and ensure that it meets the necessary standards for astronaut safety during reentry.
Therefore, the correct answer is C).
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Which of the following cells will NOT go through mitosis?
Liver cell
Sperm cell
White blood cell
Brain cell
Answers
Answer:
WHite blood cells do not go though mitosis
Explanation:
Answer:
Answer is speem cell.
Explanation:
sperm cells and egg cells don't go through mitosis.
I hope it's helpful!
a. Write a hypothesis and identify the variables you will test.
Answers
The hypothesis is; Increasing the concentration of fertilizer will lead to an increase in plant growth.
The variables to be tested are; concentration of fertilizer and plant growth.
What is a hypothesis?A hypothesis is a speculative claim or explanation put forth based on scant data and used as a springboard for additional research or trial. It is an educated guess or testable prediction regarding the correlation between two variables or phenomena.
By manipulating the concentration of fertilizer as the independent variable and measuring the resulting plant growth as the dependent variable, we can test the hypothesis and determine if there is a correlation between fertilizer concentration and plant growth.
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How are dna and mrna different
Answers
Answer: DNA has thymine as one of the two pyrimidines while MRNA has uracil as its pyrimidines base.
Which statement is supported by this cladogram?
Answers
Answer:
Ans.
The given diagram represents a cladogram, which is used to show evolutionary relationships between various organisms or species.
The intersection points between the lines show the common ancestors, which evolved into different organisms at the end of the branches, as A, B, C, D.
The first branch end (A) represents that most primitive organism, while the last branch end (D) represents the most recent organism.
Thus, the correct answer is option). 'organism A is the most primitive organism.'
Explanation:
Artificial selection (chosen by person) and natural selection (best changed in the environment) differ in one major way- the forces that select which organisms are able to survive and reproduce. How are these processes different?
a. In natural selection, the organisms best adapted to survive in the environment are more likely to reproduce and pass on their traits, while in artificial selection, humans choose which organisms survive and reproduce.
b. In natural selection, humans choose which organisms survive and reproduce, while in artificial selection, the organisms best adapted to survive in the environment are more likely to reproduce and pass on their traits.
c. In natural selection, both the humans and the environment choose which organisms survive and reproduce, while in artificial selection technology chooses which organisms survive and reproduce.
d. In natural selection, technology chooses which organisms survive and reproduce, while in artificial selection, humans and the environment choose which organisms survive and reproduce.
I think it is A, but I believe two heads are better than one. So, check my answer pelase
Answers
The way that the processes of artificial and natural selection are different are: a. In natural selection, the organisms best adapted to survive in the environment are more likely to reproduce and pass on their traits, while in artificial selection, humans choose which organisms survive and reproduce. Option A
What is meant by artificial selection?Individual organisms with certain phenotypic characteristic values are chosen for breeding through a method called artificial selection. If the chosen characteristic exhibits additive genetic variation, it will respond to selection and change over time.
Because humans (rather than nature) choose which creatures get to reproduce, this process is referred to as artificial selection. The image below demonstrates how farmers have artificially selected for certain traits to develop several crops from wild mustard.
Artificial selection is directed by human preferences and differs from natural selection in that it is not random.
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A nerve is actually a long threadlike bundle of ________ that conduct electrical impulses.
A. Synapses
B. Axons
C. Myelin sheaths
D. Dendrites
Answers
Answer:
Dendrites
Explanation: