Which of the following is a developmental issue that occurs when an infant's vertebral column does not close all the way?

Answer:

Before: (Darwin did) Physical features and behavior

Now:

DNA Testing

Explanation:

Similarities are often easy to see when one looks at two organisms that evolved from a common ancestor, and until recently, looking at physical features and behavior was the only way to determine how closely related two organisms are. However, now scientists can also analyze DNA to discover how closely organisms are related. Every living creature has DNA, which has a lot of inherited information about how the body builds itself. Scientists can compare the DNA of two organisms; the more similar the DNA, the more closely related the organisms. This method can also help when looks are deceptive. One example of looks being deceptive is: The bat and the crow both have wings, and the squirrel does not. From this, one may think that bats and crows are more closely related than bats and squirrels, while the opposite is indeed the case.

Answer:

Heyyy so B is 100% correct which means A is wrong, C is kinda weird but in a way it is correct and D does sound correct.

*B and D are correct sorry that C was wrong*

Answer:

sunlight

water

oxygen

Explanation: cuz i said

Answer:

The Standard Drinking Water Test has two components: Microbiological test and chemical quality test.

Answer:

C  if i remember correctly

Explanation:

i did this yesterday for plant cell biology

Answer:

From what I see this is a cell and the part label Y is where the enzymes break down food so the closer answer would had been C

Answer:

Helper T cells are activated when they bind to their target antigen being displayed on an antigen-presenting cell. These cells then release what chemical? Cytokines, which is a chemical that signals B cells and other T cells to activate.

Helper T cells secrete cytokines to stimulate the proliferation of B cells.

Helper T cells, also known as CD4+ T cells, are a type of white blood cell that play a critical role in the adaptive immune response. They are called "helper" cells because they help activate and coordinate other cells in the immune system, including B cells and cytotoxic T cells, to mount an effective response against a specific pathogen or foreign substance.

Helper T cells recognize and bind to antigens presented by antigen-presenting cells, such as dendritic cells, and then secrete cytokines that activate and differentiate other immune cells.

They also play a role in regulating the immune response to prevent excessive inflammation and tissue damage. Helper T cell dysfunction or depletion is associated with a number of autoimmune and infectious diseases.

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It's from optional maths

Answer:

The exudation(To discharge through pores or incisions, as moisture or other liquid) of drops of water from the leaves of some vascular plants as a result of root pressure.

Note;- Text extracted from Wiktionary

the secretion of droplets of water from the pores of plants.

Answer:

Explanation:

“Although part of your question is missing, you might be referring to this full question:

Which of the following correctly describes how mitosis and meiosis are similar?

A. Sister chromatids segregate to opposite poles of the cell during both mitosis and meiosis.

B. Crossing over occurs between homologous chromatids during both mitosis and meiosis.

C. Both mitosis and meiosis produce diploid daughter cells.

D. Both mitosis and meiosis produce genetically identical daughter cells.”

The statement that correctly describes how mitosis and meiosis are similar is “Sister chromatids segregate to opposite poles of the cell during both mitosis and meiosis”.  

Mitosis and Meiosis both are classified under cell division that tends to take place in humans and certain other animals. Both Mitosis and Meiosis have both differences and similarities in the way they result in new cells with varying goals and slightly different outcomes. Some of the similarities between meiosis and mitosis are:

During both mitosis and meiosis, cells must duplicate their DNA and pull them apart into 2 sets and further place the sets on each end of itself and then divide down the middle part

Both meiosis and mitosis results in fresh new cells depending on the genes of their parent cells  

Thus, we can conclude that the statement that correctly describes how mitosis and meiosis are similar is “Sister chromatids segregate to opposite poles of the cell during both mitosis and meiosis”. Hence, option A is the correct answer.

Answer:

A dimer (/ˈdaɪmər/) (di-, "two" + -mer, "parts") is an oligomer consisting of two monomers joined by bonds that can be either strong or weak, covalent or intermolecular. The term homodimer is used when the two molecules are identical (e.g. A–A) and heterodimer when they are not (e.g. A–B).

Answer:

b. In saliva and the pancreas

Explanation: is the correct answer

Answer:

+17.13

Explanation:

brainliest please

Solving?

Answer:

n+17.13

Explanation:

Add the numbers

7.5+n+9.63

17.13+n

Rearrange terms

17.13+n

n+17.13

Solution

n+17.13

Answer:

Sensory receptors respond to stimuli.

Explanation:

They can be classified by their location, the type of stimulus they detect or by their structural complexity.

Sensory receptors  are the receptors which respond to stimuli within the

body. The body have five major sensory organs which include the eyes,

nose, tongue, ear and skin.

These organs have receptors which is responsible in the transmission of

signal to the brain for action. The brain acts depending on the signal

received which is usually in the body's best interest.

This makes our sensory organs important and very delicate and as a result

should be adequately protected and taken are of.

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Answer:

Basilar

Explanation:

Answer:

The oxygen in inhaled air passes across the thin lining of the air sacs and into the blood vessels. This is known as diffusion. The oxygen in the blood is then carried around the body in the bloodstream, reaching every cell. When oxygen passes into the bloodstream, carbon dioxide leaves it.

Explanation:

THIS AIN'T BUILD A B-

The T-Rex diagram relates to the evolution of species on planet Earth.

The following images are shown in this diagram:

These 5 pictures can be related to finding the main message of the diagram. This diagram can be interpreted as the evolution of species on planet Earth because a dinosaur is shown first, a species that lived millions of years ago.

An image of the Earth is then displayed showing the familiar shape of the continents to demonstrate evolution on the Earth's surface.

Then show the grass because this represents the evolution of plant species that were expanding throughout most of the Earth.

Subsequently, a cow is shown as an example of the mammalian animals that exist today and finally the human who is the product of various evolutionary processes that resulted in the society and the world that we know today.

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Answer:

Most individuals will be of average height.

Explanation:

Just took it and got 100%.

1. Which statement best describes a polygenic trait?

-A polygenic trait is controlled by multiple genes and influenced by the environment.

2. IQ is determined by:

-multiple genes and environmental factors

3. Which statement best describes trait distribution?

-Distribution describes how the variation in traits is spread across a population.

4. Which statement is true?

-Mendelian traits cannot be shown on a bell curve.

5. Height in humans is a polygenic trait with a distribution similar to the graph shown. Which is true concerning the distribution of height in human populations?

-Most individuals will be of average height.

Hope this helps have a good day and happy holidays!! ^^

Answer:

Glycolysis

Explanation:

Your body uses cellular respiration to convert glucose to ATP and carbon dioxide using oxygen. Glucose moves through three stages in cellular respiration, glycolysis where glucose is converted to pyruvate, and two ATP and NADH are made

Answer:

A cell uses active transport because active transport uses energy going from high to low (against the concentraion gradient) while diffusion (passive transport which doesn't use energy) goes from low to high.

Explanation:

The cell uses active transport to move sodium ions out of the cell instead of diffusion because they are moved against a concentration gradient.

Active transport is the type of transport in which substances are moved from a region of higher concentration to a region of lower concentration.

This means that substances are moved against a concentration gradient, hence, requires energy in form of ATP to take place.

The cell uses active transport to move sodium ions out of the cell instead of diffusion because they are moved against a concentration gradient.

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Answer:

its the last answer "species name of the fireflies studied"  

i took a quiz with the same question and got it right

Species name of the fireflies studied is the information which should be

provided.

These refers to organisms which are capable of interbreeding. They usually  have the exact same features.

Scientists researching about organisms must know the exact specie as

there are different types present in organisms which makes option D the

most appropriate.

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Answer:#2 evaporation #3 what’re vaper

#4.most water evaporates from the ocean

Explanation:

Answer:

More surface area being taken up meaning in less cells getting in or out.

Answer:

9:3:3:1

Explanation:

In this inheritance pattern, the ratio that best represents the phenotype of the F2 generation is 9:3:3:1. Thus, the correct option for this question is A.

A phenotype may be defined as the mechanism of expressing genotypes in the form of traits. In more simple words, it is also characterized as the morphology or physiology which comes due to the combination of alleles.

If a trait of red feathers is denoted by R and the trait of black feathers is denoted by r, then R > r. Similarly, a trait of crests is denoted by C and the trait of non-crested is denoted by c, then, C > c.

Now, RRCC is crossed with rrcc, the F1 offspring have the genotype RrCc with the phenotype of red feathers with crests. Now, RrCc is selfed, it produces the ratio of 9:3:3:1. This is an example of a dihybrid cross.

Therefore, in this inheritance pattern, the ratio that best represents the phenotype of the F2 generation is 9:3:3:1. Thus, the correct option for this question is A.

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Answer:

1.prophase

2. metaphase

3.anaphase

4.telophase

Explanation:

Had the same question a quiz i took

Answer:

Its B I took the test

Explanation: