Answer:
The Midrib in plants protect and provide support to the leaf, a flat organ whose chief role is photosynthesis, and secondary functions are attraction of pollinators, plant protection, and in some carnivorous species, a meal.
Midrib helps to keep the leaf in an upright position and to keep the leaf strong with protection from the wind.
Read the scenario.
A biologist is studying golden frogs that live in cool streams running through the rain forests of Central America. The biologist conducts a survey of the population and counts over 100 frogs in one mile of stream. The biologist returns to the same location one year later and counts only 20 frogs in that same stretch of stream. The biologist wonders why there are suddenly so few golden frogs.
The biologist also observes that a mining company has set up a copper mine only a few miles from the stream. By reading studies on copper mining operations in other parts of the world, the biologist learns that the wastewater runoff from the mines is highly acidic and contains potentially toxic compounds.
Which part of the scientific method is best illustrated by the biologist wondering why there were so few frogs in the second year compared to the first?
a making an observation and asking a question
b collecting data
c setting up an experiment
d forming a hypothesis
Making an observation and asking a question is a part of the scientific method that is best illustrated by the biologist wondering why there were so few frogs in the second year compared to the first. Thus, the correct option is A.
What is the Scientific method?The scientific method may be defined as the procedure of objectively confirming attributes through testing and experimentation. It includes observation, hypothesis, prediction, operating an experiment, and finally investigating the results.
A biologist collected the data on the frog population before industrialization, but after a year there should be a considerable reduction in the population of frogs observed by a biologist. The cause of it is also determined by the biologist very well.
Therefore, the correct option for this question is A.
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A population of Poison dart frogs can be red (RR), orange (Rr) or yellow (rr). The allele frequency of the mainland is R: 0.5 r. 0.5. A small
group of the frogs moves to an island off the mainland. If the group is composed of 4 red and one orange frog, what would you expect to
happen to the allele frequency?
A. Increase towards the R allele
B. Increase towards the r allele
C. Stay the same as the mainland
D. Frequency of both alleles would decrease
Answer:
A
Explanation:
it will increase with a 4:1 ratio
As per the given scenario, the allele frequency will increase towards R allele. The correct option is A.
What is allele frequency?The number of times the allele of interest is observed in a population is divided by the overall number of copies of all the alleles at that particular genetic locus in the population to calculate the allele frequency.
In the given scenario, as group of the frogs moves to an island off the mainland, the allele frequency of R will increase.
Thus, the correct option is A.
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Why is it important to recycle metals?
to maintain sustainability
to create more tailings
to make sure ore remains renewable
to make it easier to extract ore from the ground
EXPERIMENT 1: PUNNETT SQUARE CROSSES Part 1: Post-Lab Questions 1. Set up and complete Punnett squares for these crosses (remember Y = yellow, y = blue): a. YY and Yy b. YY and yy 2. Answer these questions: a. What are the resulting phenotypes? b. Are there any blue kernels? c. How can you tell whether or not there are blue kernels? 3. Set up and complete a Punnett square for a cross of two of the F1 from Step 1 (above). 4. Answer these questions: a. What are the genotypes of the F2 generation? b. What are their phenotypes? c. Are there more or fewer blue kernels than in the F1 generation? 5. Identify the four possible gametes produced by the following individuals (S = smooth, s = wrinkled): a. YY Ss: b. Yy Ss:
Punnett squares are used to get the genotypic and phenotypic frequencies among the progeny produced from a cross. Punnett squares and answers below.
What is a punnett square?The Punnett square is a graphic representation that shows the different types of gamete combinations according to the alleles involved in a cross.
Punnett square shows the probabilities of getting offspring with different genotypes and their consequent phenotypes.
In the exposed example,
Diallelic genes that codes for colorY = yellow ⇒ dominant alleley = blue ⇒ recessive alleleWe will assume complete dominance, meaning that with at least one dominant allele in the genotype, the expressed color is yellow.
1)
a- Cross 1
Parentals) YY x Yy
Gametes) Y Y Y y
Punnett square) Y Y
Y YY YY
y Yy Yy
F1) Genotype
1/2 = 50% of the progeny is expected to be homozygous dominant, YY
1/2 = 50% of the progeny is expected to be heterozygous, Yy
Phenotype
100% of the progeny is expected to be yellow.
b- Cross 2
Parentals) YY x yy
Gametes) Y Y y y
Punnett square) Y Y
y Yy Yy
y Yy Yy
F1) Genotype
100% of the progeny is expected to be heterozygous, Yy
Phenotype
100% of the progeny is expected to be yellow.
2)
a. What are the resulting phenotypes? Only yellow kernels
b. Are there any blue kernels? No
c. How can you tell whether or not there are blue kernels?
Blue is the recessive phenotype for kernels. Assuming complete dominance, since all genotypes are expected to carry at least one dominant allele, all the F1 kernels are yellow.
3) Let us cross two heterozygous individuals from the F1
Parentals) Yy x Yy
Gametes) Y y Y y
Punnett square) Y y
Y YY Yy
y Yy yy
F1) Genotype
1/4 = 25% of the progeny is expected to be homozygous dominant, YY
1/2 = 50% of the progeny is expected to be heterozygous, Yy
1/4 = 25% of the progeny is expected to be homozygous recessive, yy
Phenotype
75% of the progeny is expected to be yellow.
25% of the progeny is expected to be blue.
4)
a. What are the genotypes of the F2 generation?
- 25% YY (homozygous dominant)
- 50% Yy (Heterozygous)
- 25% yy (Homozygous recessive)
b. What are their phenotypes?
- 75% yellow kernels
- 25% blue kernels
c. Are there more or fewer blue kernels than in the F1 generation?
More. Blue kernels appeared in the F2.
5. Assuming independent genes, the , are as follows
Gametes
a. YY Ss ⇒ YS, YS, Ys, Ys
b. Yy Ss ⇒ YS, Ys, yS, ys
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The molecular bonds between atoms are considered to be _____ in a food item, before you eat it.
Group of answer choices
chemical energy
kinetic energy
an example of reverse thermodynamics
cytoplasmic energy
Answer:
Chemical energy
Which form of energy does our food contain?
Yes, food serves as a basic source of the nutrients and energy needed to maintain and grow the body. Food contains what is referred to as "chemical energy" in terms of energy. This is nothing more than the bonds between the atoms that make up the specific food item, which the body may break down to release energy that it can use to create, repair, and ensure appropriate bodily function. This chemical energy is ultimately sunshine energy, which plants have the extraordinary capacity to use and store in the chemical compounds they produce, mostly in their leaves, using sunlight, water, and atmospheric carbon dioxide. Food does indeed contain energy, but that energy ultimately originates from the sun. Since people have known this for thousands of years, many civilizations revere the sun, along with water, air, and of course fire, as the source of life. For the body to function, energy is required by the muscles, brain, heart, and liver. The food we eat provides us with this energy. Our bodies break down the food we consume by combining it in the stomach with fluids (acids and enzymes). The carbohydrate (sugars and starches) in food is broken down into another form of sugar, termed glucose, during digestion in the stomach. The glucose is absorbed by the stomach and small intestines before being released into the circulation. Upon entering the bloodstream, glucose can either be utilized right away for energy or stored for later use. But in order to utilize or store glucose for energy, our systems need insulin. When insulin is absent, glucose remains in the circulation, which raises blood sugar levels. The glucose is burnt inside of your cells to create heat and adenosine triphosphate (ATP), a chemical that stores and releases energy as the cell requires. Either oxygen is present throughout the process of converting glucose into energy, or it is not. In the mitochondria, which are microscopic structures located in the gel-like fluid that fills every cell, glucose is transformed into energy using oxygen. This conversion results in waste products including water and carbon dioxide as well as energy (ATP, heat). Without oxygen, red blood cells convert glucose into energy because they lack mitochondria. ATP, heat, and lactic acid are produced as a result. Muscle cells also use glucose as a source of energy. Muscle cells are, well, double-jointed when it comes to converting glucose into energy. They can metabolize glucose with oxygen because they contain mitochondria. However, if the muscle cell's oxygen level plummets, the cells can simply convert glucose into energy on their own without it. When you have been working out so hard that you are physically out of breath, this is most likely to occur.
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Answer:
chemical energy
Explanation:
chemical energy is most likely found in foods
What role does calcium play in this regulation, and where is it stored in a muscle fiber?
Answer:
Calcium's positive molecule is important to the transmission of nerve impulses to the muscle fiber via its neurotransmitter triggering release at the junction between the nerves. Inside the muscle, calcium facilitates the interaction between actin and myosin during contractions.
Explanation:
2. Music stores arrange CD's according to the type of music - rock, country, folk, and so
on. This is an example of
a. Observation
b. Posing questions
c. Inferencing
d. Classifying
ubiquitin attaches to proteins via many biochemical reactions, please explain how this attachment targets protein for degradation and describe the biochemical reactions.
The ubiquitin attaches to proteins via many biochemical reactions, and targets the protein for degradation.
Which residue of goal protein attaches with ubiquitin?Ubiquitylation includes ubiquitin conjugation to a lysine residue of a goal protein or to an already-sure ubiquitin molecule, thereby forming a branching structure. This amendment can serve to goal the protein for degradation with the aid of using the 26S proteasome if the more than one ubiquitin molecules are conjugated with the aid of using lysine-48.
Proteins are marked for degradation with the aid of using the attachment of ubiquitin to the amino organization of the facet chain of a lysine residue. Additional ubiquitins are then delivered to shape a multiubiquitin chain. Such polyubiquitinated proteins are identified and degraded with the aid of using a large, multisubunit protease complex, known as the proteasome.
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imortance of diffusion and facilitated diffusion?
Answer:
Important
Explanation:
That's what I got
Which of the following is NOT true about steroid hormones?
Select one:
A. All of the choices are true.
B. They bind on cell membrane receptors.
C. The cannot be made in advance.
D. They have a long half-life.
E. They are derived from cholesterol.
*Physiology*
All of the choices are true about steroid hormones and is therefore denoted as option A.
What is a Steroid hormone?This substance known as steroid is derived from cholesterol and acts as a hormone in the body.
They have a long half life and bind to nuclear and cell membrane receptors for their appropriate action in the metabolic activities of the body such as homeostasis, immune response etc.
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proteins that coat the surface of red blood cells are called
The surface of the human red blood cell is dominated by a small number of abundant blood group active proteins. The major proteins are the anion transport protein (band 3) which has AB(H) activity, and Glycophorin A which has MN activity.
A small number of abundant blood group active proteins dominate the surface of the human red blood cell. Proteins that coat the surface of red blood cells are called antigens.
What are red blood cells?Red blood cells, also known as red cells, red blood corpuscles, haematids, erythroid cells, or erythrocytes, are the most common type of blood cell and the primary means of delivering oxygen to the body tissues of vertebrates.
A small number of abundant blood group active proteins dominate the surface of the human red blood cell. Proteins that coat the surface of red blood cells are called antigens.
Thus, the proteins that coat the surface of red blood cells are called antigens.
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witchh component is released from the active site of an enzyme during a chemical reaction
Options:
A. reactant
B. product
C. substrate
D. protein
Answer:
The catalyzation of a chemical reaction is greatly aided by the enzyme.
What are enzymes?Proteins called enzymes aid in accelerating our bodies' chemical reactions, or metabolism. Some compounds are created, while others are broken down. Enzymes are a component of all life. Enzymes are created by our bodies spontaneously.
The structure of the enzyme has an active site where a substrate can bind. The substrate of a complimentary form can approach and bind to the active site because it has a certain shape. Once the substrate is attached to the enzyme's active site, the reaction begins, and a product is created. At the conclusion of the process, the product is generated, released from the active site, and the enzyme is unaltered.
The product that is released from the active site is the appropriate response.
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Question 1 (3 points)
Mark all substances found in blood plasma.
A) lymphocytes
B) electrolytes
C) water
D) fibrinogen
E) eosinophils
A D E
Explanation:
Got it right on edge 2022
I need help with this. The question is: Define Evolution and Natural Selection
Answer:
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations
1. How is energy released from most fossil fuels? a) By burning it. b) By storing into the water. c) By crushing it. d) By steaming it. e) All of the above
What is a law?
A. a scientific explanation for a set of
observations that can be tested
B. a proven, universal truth that states what
happens
C. a well-tested explanation as to why
something occurs that is generally accepted
D. an assumption made about an experiment
What is the difference between a species and a population?What is the difference between a species and a population?
Answer:
A population is a group of organisms of the same species, in the same place
A species is a group of organisms that are genetically similar
Explanation:
I like to remember it with humans.
Humans (homo sapiens) are a species. We are all genetically similar and can share genetic material by reproduction.
In a city, a lot of humans are together and that is a population of humans
As a species however, we are all over the place
Question 4 of 32
How does surface-to-volume ratio relate to the size of a cell?
O A. Small cells have a smaller surface-to-volume ratio than
larger cells.
OB. There is no relationship between surface-to-volume ratio
and cell size.
O c. Small cells have a greater surface-to-volume ratio than
larger cells.
O D. Surface-to-volume ratio remains constant as cells increase
in size.
Answer:
Small cells have a smaller surface-to-volume ratio than
larger cells.
is this an underlined clause?
Nasa created the first smoke detectors when they built the space station.
What do the polar bears, reindeer, and shrubs that live in a single area make up?
organism
population
community
ecosystem
Answer:
population
Explanation:
The polar bears, reindeer, and shrubs that live in a single area make up a community. The correct option is C, a community.
What is a community?
In ecology, a community refers to a group of different species that coexist and interact within a particular area or habitat.It represents the interconnected network of species that inhabit a particular area.It includes all the living organisms, such as plants, animals, and microorganisms, that inhabit a specific ecosystem.The structure and composition of a community can be influenced by factors such as resource availability, environmental conditions, and species interactions.The polar bears, reindeer, and shrubs are distinct species that share the same geographical area and have the potential to interact with one another. They form a community within that ecosystem. It is important to note that a community does not include abiotic factors, such as soil, water, and climate, which collectively form an ecosystem.
So, the correct option is C.
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Next, create a MyPlate Plan for someone whose data is different from yours. Vary this person’s age, gender, weight, height, and level of physical activity from your own. How does this person’s calorie plan vary from yours? Why do you think this person has different energy needs?
This person's calorie plan differs from yours because they are an athlete, this person has different energy needs because they expend more energy.
What is the MyPlate Plan?The MyPlate Plan shows your food group goals - what and how much to eat within your calorie limit. Your food plan is customized based on your
agegenderheightweightand physical activity level.MyPlate guide to serving sizesFruit section = 1/4 cup.Vegetable section = 1/2 cup.Grain section = 1/2 cup.Protein section = 1/4 cup.With this information, we can conclude that this person's calorie plan differs from yours because they are an athlete, this person has different energy needs because they expend more energy.
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Stacey wants to know if plants have the same phototrophic reaction from artificial light as they do from natural light. Using steps in the scientific method, design an experiment that will test this effect.
Explanation:
Yes I agree that plants have the same phototrophic reaction from artificial light as they do from natural light.
you have to take a big box an keep a small plant in it and make some holes in down side for taking carbon dioxide then attach a bulb in left side of the box and lit it and cover the box
after two days you will notice that plant is leaned towards the bulb
this show that plants have the same phototrophic reaction from artificial light as they do from natural light.
Choose the items that are correctly matched.
Select one:
A. inactivation gate - open at rest
B. activation gate - closed during depolarization
C. activation gate - open at rest
D. inactivation gate - open during repolarization
E. All of the answers are incorrectly matched.
*for physiology*
Answer: D activation gate opens during repolarization
What is a dependent variable
Answer:
your mom mooching off of me
Explanation:
What is the identity of element Y? C B Na S
Answer:
C-carbon
B-boron
Na- sodium
S-sulfur
David a cma obtains mr. Washington’s vital signs after he has escorted him to examination room. David notes mr Washington’s vital signs as follows we 235 lbs t 97.6 p 94 bpm rapid and bounding bp 148/92. What can you ascertain from these findings?
We may conclude that Mr. Washington has hypertension based on the BP measurements he provided.
In light of this, we can respond to the questions presented above as follows:
Blood pressure, abbreviated as BP, is regarded as normal when it registers readings less than 140/90 mmHg. Mr. Washington's blood pressure reading of 148/92 mmHg indicates that he is hypertensive, that is, that his blood pressure is higher than normal.Because they are more sensitive to sodium and can store this element in the body more powerfully than white individuals, African Americans like Mr. Washington are more likely to acquire hypertension.Exercise, more water consumption, a sodium-free diet, and other lifestyle changes should all be suggested by the doctor to Mr. Washington to assist him manage his blood pressure.
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A movement that keeps the distal end of the body segment fixed in one location describes what type of kinetic chain moveme
Answer:
Closed Chain
Explanation:
A closed chain refers to a position where the most distal aspects of a given extremity are fixed to the earth or another solid object. This fixed position alters the movement of the joints and surrounding musculature up the chain.
What described step three of a muscle contraction
Answer:
D. Actin and myosin are completely overlapped.
A student is using a multi-colored paper plate to represent an animal population. In her model, each section of the plate represents
an individual, and the colors in each section represents the combination of genes that individual possesses. To model a certain
genetic process, the student cuts the paper plate and separates four individuals from the rest of the population, forming two smaller
populations.
Which process is the student most likely modeling?
Answer:
Founder effect?
Explanation:
My best bet is that it is explaining founder effect. This is where a small amount of members in a population move to an isolated place which causes them to lose the genetic diversity overtime (due to less diversity).
Hope it's right. Let me know down in the comments.
What is inter-cropping vegetable farming ? What are its advantage
Explanation:
What is inter-cropping farming ?
= The growing of two or more crops of different characteristics and requirements at the same time on the same plot of land is called inter-cropping. The process of growing different vegetables in the inter-cropping system is called inter-cropping vegetable farming.....
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