For the common ancestor of all the Bilateria, what was the fate of the blastopore?
For the common ancestor of all the Bilateria, what was the fate of the blastopore?
neither (N)
deuterostomy (D)
protostomy (P)
It is impossible to tell from the data provided.

Answers

Answer 1
The right answer here speaing about the blastopore is the last option: It is impossible to tell from the data provided. Indeed the data provided for this fate is not definite and is not possible to know if it was deuterostomy or protostomy
Answer 2

Answer;

It is impossible to tell from the data provided.


Explanation;

Different animals can be categorized as either protostomes and deuterostomes based on certain features of their embryonic developments.

For those categorized as protostome; the features include; mouth from blastopore, spiral,determinate cleavage, and coelom from solid masses of mesoderm

Those categorized as deuterostome have features such as coelom from folds of archenteron, radial, indeterminate cleavage, and anus from blastopore.



Related Questions

A human baby is born with one X chromosome and one Y chromosome. What must be true about this baby?

A. The baby is female.
B. The baby is haploid.
C. The baby is male.
D. The baby is prokaryotic.

Answers

the baby is a male.  

remember that women have eggs and they carry the X chromosome no matter what. humans have sex chromosomes in women they are both known as the X chromosome.  females have 2 X chromosomes whereas males have one X and one Y chromosome. 

The chromosome makeup of an organism determines its gender, characteristics, and development. The human baby with XY chromosome will be male.

Chromosome  Make-Up of Humans

The humans undergo fertilization, in which haploid gametes fuse to form a diploid organism.

The females have two XX chromosomes while males have XY chromosomes. The type of chromosome delivered by the male parent will determine the gender of the child.

Thus, the baby with XY chromosome will be identified as male.

The correct answer is Option C.

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Which statement below BEST summarizes the role of the DNA molecule in cells? A) guides cell division B) protects cells from infection Eliminate C) provides the instructions for making proteins D) regulates the chemical processes that provide the cell with energy

Answers

The answer right here is C)provides the instructions for making proteins. We may explain this answer saying that DNA role is to make protein synthesis that is needed by the cell. I hope this helps a lot 

The correct answer here is c.

Where in the sun does the product of energy take place?

Answers

at core H and H fuse to form He during which huge eneegy is realeased

Answer:

the core,

Explanation:

The energy is produced in the sun in the core of the sun. The energy is produced by the process of nuclear fusion. The nuclear fusion occurs when two hydrogen nuclei joins to form the helium.

About 300 million years ago, the seas and oceans were inhabited by tiny plants and other organisms. These organisms died and were buried on the ocean floor. Over time, their bodies were covered with silt and mud that was rich in organic material, forming layers of organic matter. This matter was subjected to high temperature and pressure. In such conditions, oxygen was available in abundance. Over a period of many years, the matter decomposed and formed oil and gas. which sentence is incorrect

Answers

In such conditions, oxygen was available in abundance.

Answer:

The formation of petroleum takes place because of various chemical reactions, which take place to the substances that were once living. In the majority of the cases, the formation of liquid petroleum takes place from the algae and zooplankton, which get settled to the bottom of the lake or sea, and was then got buried underneath the sediments.  

The sediment makes sure that no oxygen could reach the dead and decaying organic matter, and thus, the stage gets set for the production of oil. In the majority of the cases, the organic matter goes via many modifications, which take millions of years. The sediments continue to pile over each other and enhance the pressure on the organic matter, this leads to the formation of natural gas and liquid petroleum.  

Thus, the sentence, that is, "In such conditions, oxygen was available in abundance" is the incorrect one.  

Why is cytoplasmic streaming called "active mass movement of cytoplasm"? ...?

Answers

Hi , cytoplasmic streaming is actually circulating around in the cell . It moves and by doing do it can help move organelles and harmful/helpful chemicals to where they need to be in the cell , so that's why cytoplasmic streaming is also called active mass movement of cytoplasm.

Which of these is not a classified organism?

A. Lizard
B. Tree
C. Apple
D. Bacteria

Thanks!!! :D *This is a SCIENCE question, I put Biology as an option, because there was no selection for Science...* ;-;

Answers

Answer:

The correct answer is C. Apple

Explanation:

An organism is a living individual which can reproduce, grow, react, adapt, move, metabolize and have an organized structure. All organisms are living things.  

Apple is a fruit that is non-living, it can not reproduce, it does not have an organized structure that can support life in it so apple do not contain any characteristics of life, therefore, it cannot be classified as an organism.

Lizard, trees, and bacteria are organisms because they satisfy all the characteristics of an organism. Therefore the right answer is C. Apple.  

Answer:

Apple

Explanation:

i took test

it ok i thisnk it is kinda a biology question

Question: Cells are similar in many ways, but differ in organisms from different kingdoms. What are the similarities and differences among cells in members of the kingdoms made of eukaryotic cells?

Answers

Eukaryotes (IPA: [juːˈkæɹɪɒt]) are organisms whose cells are organized into complex structures by internal membranes and a cytoskeleton. The most characteristic membrane bound structure is the nucleus. This feature gives them their name, (also spelled "eucaryote,") which comes from the Greek ευ, meaning good/true, and κάρυον, meaning nut, referring to the nucleus. Animals, plants, fungi, and protists are eukaryotes.

Final answer:

The eukaryotic cells of different kingdoms share common structures like a membrane-bound nucleus and organelles, but differ in other features, such as the presence of a cell wall in plant cells and centrioles in animal cells.

Explanation:

The question asks about the similarities and differences among cells from the eukaryotic kingdoms. All eukaryotic cells share certain characteristics, such as having a membrane-bound nucleus and organelles, including the mitochondria, endoplasmic reticulum, Golgi apparatus, and in many cases, lysosomes and peroxisomes. However, they differ in structural and functional aspects based on their kingdom. For example, plant cells have a cell wall, chloroplasts, and a large central vacuole, which are not present in animal cells. Animal cells have centrioles, which are less common in plant cells. Fungi and protists also have unique features; for instance, fungi have a rigid cell wall made of chitin, and some protists have flagella or cilia for movement. These differences arise because each type of cell has evolved to suit its particular functions within the organism's body or environment.

How do ribosomes exit the nucleus once formed?

Answers

The ribosome units leave the nucleus through the nuclear pores and unite once in the cytoplasm for the purpose of protein synthesis. When protein production is not being carried out, the two subunits of a ribosome are separated.
Hopefully that was of help to you :)

Which option is a balanced equation for cellular respiration?

Answers

C6H12O6 + 6O2 -> 6CO2 + 6H2O

The answer is; B

C6H12O6+6O2→6CO2+6H2O+36ATP

In respiration, glucose is broken down to produce ATP that is the energy currency of the body. The process of respiration occurs in three processes; the pyruvate cycle, the Krebs cycle, and oxidative phosphorylation.  Water and ATP are the ultimate products in the biochemical process of breaking down glucose molecules. Oxygen is consumed. The equation has to be balanced on both sides due to the rule of conservation of matter in thermodynamics.



Why did Mendel prevent his plants from self-pollinating?

to control the crossing of the traits
in order to insure that each plant's offspring would remain identical to the parents
to maintain a pure strain
so they could not produce offspring

Answers

The answer is to control the crossing of the traits.

The idea of preventing plants from self-pollinating is to control the crossing of the traits. If plants were self-pollinating, he could not know if the traits are inherited from the same plant or from the other. By preventing this, he could cross parents with known phenotype and that way learn about crossing process and inheriting process.

SOS:

The answer is to control the crossing of the traits!

Hope this helps!

Why is cytokinesis the shortest phase in cell division?

Answers

Because its the splitting of two cells. Typically two daughter cells.

Which of the following best explains the environmental problems associated with trawling?
a.
Trawling always destroys sea floor ecologies.
b.
Trawling gathers fish indiscriminately.
c.
Trawling is too selective at gathering fish.
d.
All of the above

i know its not D.

Answers

The right option is; b. Trawling gathers fish indiscriminately.

Trawling gathers fish indiscriminately best explains the environmental problems associated with trawling.

Trawling is a method of fishing in which cone shaped fishing nets that are produced from two or more panels are pulled by one or more boats (trawlers) through the water (in the middle or on the bottom). Trawling is non-selective and it captures and removes fish indiscriminately from the water. It gathers small sized species, marketable, and unwanted or non-target species of both legal and illegal size. Trawling can accidentally kill valued species such as sharks and dolphins in water.


Answer:

The answer is B

Explanation:

I just took the edgenu test.

How many phosphate groups are in one molecule of atp?

Answers

Answer:

3 Phosphate Groups

Explanation:

ATP stands for adenosine triphosphate. Triphosphate, which describes how many phosphate groups, includes the prefix tri. Tri means three. So, Triphosphate means three phosphate groups.

Final answer:

An adenosine triphosphate (ATP) molecule consists of three phosphate groups attached to an adenine base and a ribose sugar. The ATP molecule is considered highly unstable, due to the repulsion of negatively charged phosphate groups. Breaking the bond between the phosphate groups releases energy.

Explanation:

In a molecule of adenosine triphosphate (ATP), there are three phosphate groups. This molecule is comprised of a nitrogenous base called adenine, a five-carbon sugar called ribose, and the three phosphate groups. The phosphate groups are in a series, which makes the ATP molecule highly unstable due to the repulsion between the negatively charged phosphate groups. The addition of each phosphate group to the molecule requires high energy, leading to the formation of high-energy bonds, particularly between the second and third phosphate groups. This bond is considered a 'high-energy' bond, and when broken, significant energy is released that can be utilized for various cellular reactions and processes. When one phosphate group is removed, ATP converts back to adenosine diphosphate (ADP) in a process called dephosphorylation, releasing energy.

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You are a researcher interested in studying the cytoskeleton. How can you use antibodies to locate actin- and tubulin-containing structures?

Answers

cytoskeleton is composed of globular proteins placed in a way similar to chains, ou queues. they are only few types of these globular proteins, and they dispose following precise patterns. actin and tubulin are made of actin subunits and a- and b-tubulin alternating subunits respectively. antibodies are proteins too. they are composed by two regions. one is common to all antibodies, one is specific for interaction with a substrate through a mechanism of the kind key-and-lock. to locate where actin and tubulin are in a cell, you can simply construct specific antibodies. you just have to keep the common part of the antibody and bind to it a chromophore (a molecule capadble of emitting fluorescence if irradiated with light at a specific wavelenght). then you have to bind to this part a suitable "lock" for actin or tubulin. you can only do this if you know the structure of actin and tubulin and their phisical properties, which can determine what kind of interactions they can establish with precise molecules.

what keeps molecules concentrated, limiting disorder?

Answers

The answer would be, Cell membrane.

The universe could be considered an isolated system because?

Answers

This answer is a physical system that is not affected by any other system. You might incorrectly state that an object is space is isolated from everything else, and it does seem that way. It's still affected by gravitational fields, but negligibly. However, you look at the universe which you define to be everything ever.

if a DNA molecule is compared to a spiral staircase what parts make up the steps

Answers

The steps or rungs of the DNA molecule are composed of respective nitrogenous bases, complementary base pairing by forming respective hydrogen bonds with other nitrogenous bases of the other nucleotides that make up the second polynucleotide strand of DNA. The sides of the DNA molecule are composed of sugar and phosphate making up the sugar phosphate backbone.

Cell walls are made of cellulose in ____________ cells.

A) animal B) bacteria C) fungal D) plant

Answers

Cell walls are made of cellulose in (Plant) cells.

Answer: D. Plants

Cell walls of plants are made up of cellulose. Cellulose is a type of polysaccharide. It provides rigidity to the plant cell wall. It is a structural carbohydrate that can provide protection to the cell  from the external environment and provides the structural support to the cell. It makes the plant cells of the leaves, and stems strong.

Drosophila may be monosomic for chromosome 4, yet remain fertile. A recessive mutant for bent bristles is identified on chromosome 4. Determine the genotypes of the F1 and F2 progeny for the following crosses.
The following cross is conducted of true-breeding adult flies: monosomic bent bristles x diploid normal bristles. Select the two F1 genotypes that will be produced from this cross
a. -/b+
b. -/b
c. b/b
d. b/b+
e. b+/b+

Answers

The answers are:
a. -/b+
d. b/b+

b+ - the allele for normal bristles
b - the allele for bent pristles

Monosomic means there is only one instead of two alleles in a gene locus.
So, the parents' genotypes are:
monosomic bent bristles: -/b
diploid normal bristles: b+/b+

The following cross is conducted of true-breeding adult flies:
Parents' phenotype: monosomic bent bristles x diploid normal bristles
Parents' genotype:                      -/b                   x              b+/b+
F1 generation:                       -/b+            -/b+                 b/b+            b/b+

Final answer:

In a cross between a monosomic bent bristle fruit fly and a diploid normal bristle fruit fly, two possible F1 genotypes are produced: monosomic with a normal allele (-/b+) and diploid with one bent bristle and one normal allele (b/b+).

Explanation:

The question involves a cross between a monosomic bent bristle fruit fly (Drosophila melanogaster) and a diploid normal bristle fruit fly to see which F1 genotypes would be produced. In the context of genetics, "monosomic" refers to having only one copy of a particular chromosome in an otherwise diploid cell. Bent bristles (b) is considered a recessive mutation on chromosome 4. When a monosomic bent bristle fly is crossed with a diploid normal bristle fly, since the monosomic fly has only one chromosome 4 with the 'b' allele and the diploid normal has two chromosome 4s, one with 'b+' (normal) allele, the possible genotypes for F1 are as follows:

-/b+ (monosomic with the normal allele)

b/b+ (diploid with one bent bristle and one normal allele)

Therefore, the correct F1 genotypes produced from this cross are a. -/b+ and d. b/b+. This demonstrates how monosomy and complete dominance work in fruit fly genetics.

Which type of wave requires a medium in which to travel? A) Heat B) Electromagnetic C) Light D) Mechanical

Answers

The correct answer for the given question would be option D. The type of wave that requires a medium in which to travel would be the mechanical waves. Examples of such waves would be waves on a jump rope, a slinky, surface waves on water, and sound waves. On the other hand, electromagnetic waves do not require any medium to travel. Hope this answer helps.

Mechanical waves are the kind of wave that need a medium to move through. The correct option is D.

Thus, mechanical waves need a physical medium like a solid, liquid, or gas. Through the oscillation or vibrating of the medium's particles, these waves transmit energy. Sound waves, seismic waves (from earthquakes), and water waves are all examples of mechanical waves.

In order to travel in a medium, mechanical waves like sound waves and seismic waves must physically interact with and move around particles. Heat, electromagnetic, and light waves, on the other hand, may go across a vacuum or void of space without a medium.

Thus, the ideal selection is option D.

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Coral reef ecosystems support over a million different species. True or false?

Answers

The answer to this question is (False) 

Answer:

True

Explanation:

Coral reef supports millions of species in and around it. It is known as one of the diverse ecosystem on Earth. The density of species (i.e number of species in a given unit of area) is the highest in coral ecosystem as compared to other ecosystems of the planet. There are approximately thousand species of fish, corals, seahorses, lobsters, sea turtles.  

The human body has the ability to select the ______ it needs from the foods you eat

Answers

the body can decide the nutrients it needs

Sharpei dogs have wrinkled skin that they never fully grow into. The extra skin is produced because their DNA codes for an extra switch of the HAS2 protein. What is this genetic variation a result of?

Question 4 options:

Meiosis


Mitosis


Inherited mutation


Acquired mutation

Answers

I think it might be mitosis because it's sexual reproduction and animals just like humans have traits from the parents

Based on anatomical similarities, to which modern animal is Dr. Digger’s creature most closely related? zebra bony fish sea turtle snak

Answers

Sounds like a sea turtle to me! ^u^

c-sea turtle is the answer

how would ypu describe the lysogenic cycle

Answers

Do you want that in steps?

Answer:

Explanation:

Viruses are set of organisms that are incapable of replicating on their own. They depend on an host cell to reproduce and they achieve this by infecting the host cell. Hence, the process of infection of a virus is regarded as its reproductive life cycle. Generally, a virus attaches itself to the surface of its host cell by recognizing and binding to specific receptor sites. This phase is called ATTACHMENT.

It then inserts its genetic material into the host's genome in a process called PENETRATION. It employs its host cell's transcriptional, translational, replication abilities to reproduce its genetic material. After this, some viruses exit the host cell by bursting the cell open in a process called LYSIS, however, others incorporate their genetic material into the host's and becomes part of the host.

Hence, as the host replicates its own genetic material, it also replicates the viral genetic material and passes it on to Its offsprings. This process is called the LYSOGENIC cycle, it is opposed to the LYTIC cycle being that the virus does not kill the host cell.

Organisms that reproduce sexually receive genetic material from both parents when fertilization occurs. The development of the zygote into a multicellular organism is the result of

Answers

The development of the zygote is the result of Mitosis

The answer is B. Mitosis and cell differentation.

Fructose is a molecule that can move across the cell membrane. if the concentration of fructose is higher outside the cell than inside the cell, then what will happen by the process of diffusion?

Answers

Fructose will move into the cell from outside by diffusion due to the concentration gradient, continuing until the concentrations inside and outside the cell are equal.

When the concentration of fructose is higher outside the cell than inside, the molecule will move across the cell membrane by the process of diffusion. Diffusion is the net movement of molecules from an area of higher concentration to an area of lower concentration, following the concentration gradient until equilibrium is reached. As long as fructose can freely pass through the cell membrane without the need for specific carrier proteins, it will continue to diffuse in this manner.

The process of diffusion does not depend on the pore specificity of the semipermeable membrane, but rather on the existence of a concentration gradient. The presence of this gradient means that fructose will naturally move into the cell until the intracellular and extracellular concentrations of fructose are equal. This movement of fructose will occur without any input of energy and will cease when equilibrium is reached.

a substance has a half-life of 100,000 years and an initial mass of 1,000 grams. how many years will pass before only 250 grams of the substances parent material is left?

Answers

I`ll take a gander and say 200,000 years

Which two structures would provide a positive identification of an animal cell under a microscope?

nucleus, vesicle

ribosome, lysosome

flagellum, lysosome

chromatin, chloroplast


Answers

The first. That is the answer

The nucleus and lysosomes would provide positive identification of an animal cell under a microscope due to their unique structures and biochemical markers. Chloroplasts and flagella are not specific to animal cells and therefore not definitive for identification. Ribosomes are common to all cell types and also not unique to animal cells.

The structures that would provide a positive identification of an animal cell under a microscope are the nucleus and lysosomes. The nucleus is a prominent organelle within eukaryotic cells that contains the cell's genetic material, and it can be identified by its structure as it is typically the largest organelle in the cell. On the other hand, lysosomes are membrane-bound organelles that contain digestive enzymes and can be identified biochemically by the presence of these enzymes. Neither chloroplasts, which are specific to plant cells and certain algae, nor flagella, which are not present in all animal cells, would be definitive for identifying an animal cell. Ribosomes, although found in all types of cells, are not unique to animal cells and hence are not definitive either.

Under an electron microscope, the isolated nuclei might be identified by their large size and the presence of nucleic acids which can be confirmed by molecular analyses. The Rough Endoplasmic Reticulum (RER) would be identifiable by the ribosomes attached to its membrane. Golgi vesicles and lysosomes can be distinguished by their morphology and contents; Golgi vesicles are often seen in stacks or cisternae, whereas lysosomes have a more regular, rounded shape.

Your classmate will be doing a presentation on evolutionary medicine in science class. What is he likely to discuss?

Answers

the importance of mendince how it is used and made

Answer:

A.) the ability of pathogens to resist treatments

Explanation:

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