Three redwood trees are kept at different humidity levels inside a greenhouse for 12 weeks. One tree is left outside in normal conditions. The heights of the trees are measured once a week. What is the Independent Variable: What is the Dependent Variable​? What is the controlled variable?

Answer:

d

Explanation:

Crossing over shuffles alleles on non-sister chromatids of homologous chromosomes.

At the prophase I stage of meiosis, homologous chromosomes synapsed to form a four-chromatid structure known as tetrad. Exchange of chromosomal segments between non-sister chromatids of the tetrad then takes place, a process that results in the reshuffling of genes or alleles on the non-sister chromatids.

Hence, none of the answers is correct.

Correct option: d

Answer:

To anticipate changed in weather patterns

Explanation:

1. I took the test

2. Scientist who study weather need to have a high quality standard technology in order for them to forecast weather accurately and also to forecast weather several days in advance.

Answer:

The aromatic amino acids; Phenylalanine, Tryptophan, Tyrosine

Amino acids with bulky side chains; Leucine and Methionine

Explanation:

Chymotrypsin is a member of the serine proteases, which is family of enzymes that hydrolyze peptide bonds through the action of an active site serine.

Chymotrypsin cleaves peptide bonds on the C-terminal of aromatic amino acids or amino acids with bulky hydrophobic sides chains such as phenylalanine, tyrosine and tryptophan, leucine and methionine. This specificity for aromatic amino acids is due to its large hydrophobic pocket and due to the complementary nature of these amino acids when they bind to the pocket.

Answer:

Ligaments and tendons (since they have less elastic tissue) are not intended to stretched very much at all. Overstretching them may weaken the joint's integrity and cause destabilization (which increases the risk of injury).

Answer:

microsporangium​ are sporangia that produce microspores and give rise to male gametes

Explanation:

Answer:

yes

Explanation:

everthing does even fire

Answer:

Seismograph?

Explanation:

If an earthquake happens, seismologists use seismic waves that are detected with seismographs, to locate the epicenter of an earthquake, and also to estimate the strength and duration of the earthquake

Answer:

It depends the substance

Explanation:

Physical properties of a substance like Color, odor, density, melting temperature, boiling temperature can determine the purity of a substance.

The matter can be classified as pure substances and mixtures.

Pure substances are made up same kind of particle and have a constant structure.

Pure substances can be up two types elements and compounds.

An element which consists of only one type atom, so it can not be broken down by using physical or chemical method. Elements are metals, non-metals or metalloids.

Compounds are the pure substances if two or more same type of elements are combined chemically, but these can be broken down into separate elements by treating them with chemical methods.

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Answer: I hope this help it is B.39.75%

Explanation:

The porosity of the silt sample is :

B) 39.75%"

"Porosity of silt sample"

The porosity of the silt sample is 39.75%.

Soil porosity alludes to the division of the full soil volume that's taken up by the pore space .

A sponge is an case of a permeable fabric because it incorporates a huge number of purge spaces compared to its volume.

Porosity is the property of an question that communicates the entire volume of purge or pore space within the material.

Thus, the correct answer is B.

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Answer:

(B)iology

Explanation:

Biology is a branch of science that studies about the living organisms.

Answer:

A nail grows from a deep layer of living epidermal tissues, called the nail matrix, at the proximal end of the nail. Stem cells in the nail matrix keep dividing to allow nail growth, forming first the nail root and then the nail plate as the nail continues to grow longer and emerges from the epidermis    

Hope this helps

Answer:

nail matrix

Explanation:

it is found at the proximal end, and it contains stem cells, which form keratinocytes( which make up the nail)

Answer:

predation

Explanation:

the lizard is acting as a predator to the insect

Answer:

b. False

Explanation:

A scientific theory must have strong support from testable facts that are confirmed (or rejected) by observational and/or experimental procedures. The scientific method is a rigorous process that consists of arising a conjecture (hypothesis) which can be subsequently used to make predictions from its logical consequences, and finally to obtain information from empirical observations/experiments in order to obtain a conclusion about the veracity of the scientific claims (i.e., a hypothesis must be testable). In consequence, a scientific theory can not be based only on 'light' conjectures, but trustworthy observational data from the real world.

Answer:

- 002 .45 2.71 3.84 6.64 10.83

2 0.02 0.21 1.39 4.61 5.99 9.21 13.82

3 0.11 0.58 2.37 6.25 7.81 11.35 16.25

4 0.30 1.03 3.36 7.78 9.49 13.28 18.

Explanation:

From the test cross and X² test, I assume the individual is dihybrid and genes are in separate chromosomes. 1)25 aB. 2)X²=2. 3)P₀.₀₅=7.81. 4)Accept the model.

A test cross is a cross we use to determine the genotype of individuals whose phenotype we already recognize.

The cross occurs between the individual of an unknown genotype and a recessive h0m0zygous individual. We want to know if the unknown  genotype is heter0zyg0us or h0m0zyg0us dominant for a single gene.

Considering only one gene involved in the cross,

The phenotypic and genotypic ratio is 1:1

Considering two genes that assort independently are test crossed,

If more than one gene are involved, we can also determine if these genes assort independently, or if they are linked.

When phenotypes appear in different proportions than the expected ones, we can assume that these genes are linked.

However, the difference between the observed and the expected data can be by random chance. This means that genes could assort independently, but by chance, the observed ratios vary from the expected ones.

To analyze these situations and determine is the difference is by chance or because genes are linked, we need to perform a chi-square test.

---------------------

Now, let us answer the question.

Available data:

Test cross

F1 = 100 individuals

1)  What expected number would you use for the aB class?

To answer this question, we assume genes assort independently, so if this is the case, genotypic ratio should be 1:1:1:1, or 25% AB : 25% aB : 25% Ab : 25% ab

100% ------------- 100 individuals

25% -------------X = (25% x 100) / 100% = 25 individuals AB

25% -------------X = (25% x 100) / 100% = 25 individuals aB

25% -------------X = (25% x 100) / 100% = 25 individuals Ab

25% -------------X = (25% x 100) / 100% = 25 individuals ab

So, accordig to our calculations, the expected number for the aB class is 25 individuals.

----------------------------

2) Calculate the chi-square value.

Model: dihybrid test cross of two genes on separate chromosomes -assort independently-.

                             AB         Ab          aB         ab      

Observed, O        22          28          29         21

Expected, E          25          25         25        25    

(O-E)² / E             0.36      0.36       0.64      0.64

X² =  Σ(Obs-Exp)²/Exp =  0.36 + 0.36 + 0.64 + 0.64 = 2

X² = 2

The chi-square value is X² = 2

-------------------------

3) Determine the probability that the model would give the observed data.

Freedom degrees = n - 1          Where n is the number of classes ⇒ 4.

Freedom degrees = 4 - 1 = 3

Significance level = 0.05

Conventionally, we use 0.05 = 5% as the significance level.

Critical value (table value) = 7.81

Considering a significance level of 0.05 and 3 freedom degrees, the critical value equals 7.81.

--------------------------

4) would you accept or reject your model?

X² < P₀.₀₅  ⇒ 2 < 7.81

p value is greater than X², so there is not enough evidence to reject the null hypothesis. The ungenotype might be a dihybrid, and there might be independent assortment.

I would accept the model.

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Answer:

Process of describing the patterns in which rock layers are deposited.

Explanation:

Stratigraphy is a field of earth sciences that studies the sequence of consecutive rock layers (stratification), with the aim of dating and describe the characteristics of the soil.

Stratigraphy is used to determine the paleogeography of an area. It also plays an important role in archaeological, paleoclimatic and paleontological research, where it is important to know from which layer a particular object, fossil or data originates and to which age it corresponds.

Answer:

It is the thickest layer of the earth about 2900 km thick

It makes up 82% of the earth's volume and is in a semi - molten state

This is where magma is found and created

Convection currents in the mantle causes the tectonic plates to move

Explanation:

Answer:

Pollinators are such as bees, insects, moths etc. that help in pollination of flowers.

Explanation:

When we heard about the pollinator we always think that theses are bees. Bees are very important in pollination of the plant. Pollinators are the insects that take some pollen from one flower to another flower and the procedure  takes place for further.

These flowers attracts bees, insects, butterflies, bats moth and small mammals. Rose color and its tempt with fragrance attracts insects and bees. There are variety of flowers that attracts pollen but rose attract more because of fragrance and its color.

Answer:

Contour lines that are closely spaced(Apex Approve)

Explanation:

On a topographic map the amount of elevation change is related to the number of contour lines. Using the same contour interval, the more contour lines over the same distance indicates a steeper slope. As a result, areas of a map where the contour lines are close together indicate steeper slopes

Explanation:

You need to add a picture so we can see all of the statements.

Answer:

C: The hypothesis was false, and scientists should replace it with a new one.

try it

Answer:

The correct answer is E) the authors of the Metabo-Herb Study depart from scientific convention by characterizing the results of their study as ‘proving’ their hypothesis.

Explanation:

Scientific convention refers to the meeting or gathering of scientists with similar interests to agree on a collective way of pursuing, addressing, or approaching a set of agreed activities.

In order words, is an agreed way of doing things by a group of scientists with similar interests.

In relation to the question, there is a scientific convention with respect to experiments and the presentation of scientific studies. The scientific convention requires that figures, formulae, units, and data (graphs, diagrams, tables) must be included in the presentation of studies for other scientists to also verify before a study can be accepted as having proven its hypothesis.

Cheers!

Answer:

Cells divide and reproduce in two ways, mitosis and meiosis. Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells. Below we highlight the keys differences and similarities between the two types of cell division.

Explanation:

Answer:

The correct answer is a magma chamber

Explanation:

Got it right on Edge 2020

Answer:

the answer is c

Explanation:

:3 np i was glade to help

Answer:

Matter

Explanation:

Matter consist of tiny and discrete particles

Explanation:

Hey there!!

The answer is matter.

We simply define matter as anything which occupies space, has some mass.

Hope it helps...

Answer: Option E.

Coronary sinus, right atrium.

Explanation:

Coronary sinus, right atrium is part of the circulatory system that consist of arteries, arterioles, veins, capillaries that move blood to the heart tissue and remove waste from the blood.

The cardiac veins return deoxygenated blood to the right atrium and it them moves to the right ventricle then to the heart where it becomes oxygenated

The coronary sinus received drain blood from ventricles veins, it then moves the deoxygenated blood to the right atrium which it transfer or move to the right ventricle (through the tricuspid valve which in turn move the blood to the pulmonary artery for pulmonary veins.

Answer:

due to the rate of blood circulation

Answer:

is a quantity that describes the effect of a net force acting on an object (a kind of "moving force").

is represented by the symbol J (boldface).

is the product of the average net force acting on an object and its duration.

J = F∆t

is the force-time integral.

J = ⌠

⌡ F dt

is a vector quantity (since force is a vector and time is a scalar).

Impulse-Momentum Theorem

The impulse-momentum theorem states that the change in momentum of an object equals the impulse applied to it.

J = ∆p

If mass is constant, then…

F∆t = m∆v

If mass is changing, then…

F dt = m dv + v dm

The impulse-momentum theorem is logically equivalent to Newton's second law of motion (the force

Answer:

What diagram my guy

Explanation:

Theres  no diagram

The part of the brain is labeled c in the diagram​ is forebrain which has been represented in the diagram.

In comparison to the right brain, the left brain is more linguistic, analytical, and organized. It is often referred to as the digital brain. It performs tasks like reading, writing, and calculations better.

According to the hypothesis, persons who are left-brain dominant perform best in occupations that require verbal, mathematical, and linear thinking, such as that of an accountant, scientist, or computer programmer.

Children that use their left brain more effectively tend to think more analytically and do academically well. They might be very good at memorizing enormous quantities of information, have a large vocabulary, and pay close attention to detail.

Therefore, The part of the brain is labeled c in the diagram​ is forebrain which has been represented in the diagram.

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Answer:

The answer is C.)

Explanation:

I took the test.