The statements that correctly describe gestation are: the normal period of gestation is about 40 weeks; the stages of this process include: zygote, blastocyst, embryo, and fetus; and changes to the form of the embryo come from differentiation and growth.
The gestation period in humans lasts about 40 weeks and comprises different stages and processes from conception until birth. The main stages of this process include:
Zygote: Fertilized ovum.Blastocyst: Cluster of cells that is the result of the zygote going through cell division.Embryo: Unborn human that is still developing, usually before the 8th week of gestation.Fetus: Unborn human in development after the 8th week of gestation.Moreover, this process implies differentiation as cells specialize for specific functions, for example, muscle cells or nerve cells, and growth as the number of cells increases and therefore the embryo or fetus increases in size.
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Answer:
Many different types of cells make up the human body. Therefore, it is important for cells to differentiate to form different types of tissue. The tissue can then combine to form different organs and systems that carry out specialized functions for the human body.
Explanation:
Differences between bacteria and plants
Answer:
Main Difference – Plant Cell vs Bacterial Cell
The plant cell is a eukaryotic cell whereas the bacterial cell is a prokaryotic cell. The main difference between plant cell and bacterial cell is that plant cell contains membrane-bound organelles whereas bacterial cell lacks membrane-bound organelles.
Explanation:
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Why do organisms perform fermentation?
Answer: Because muscle cells cannot get oxygen fast enough to meet their energy needs through aerobic respiration.
Answer: Because muscle cells cannot get oxygen fast enough.
what was the first life form on earth based on the diagram above
Answer:
The earliest life forms we know of were microscopic organisms (microbes) that left signals of their presence in rocks about 3.7 billion years old. The signals consisted of a type of carbon molecule that is produced by living things.
Explanation:
How do you think scientists figure out the life cycle of a star
Answer:
space
Explanation:
they figured it out going to space and since a star is a small peice of the sun they can't touch it it's impossible without getting heat burns or dying so they ither observe a star using a telescope or went to space for days
In order for meiosis to create four, genetically different gametes, DNA replication must occur. Which of these best describes when DNA replication would occur during meiosis?
A) prior to meiosis I
B) prior to meiosis II
C) prophase I in meiosis I
D) prior to meiosis I and meiosis II
Answer:
I guess prlor to melosis is the right answer
come up with a question for an investigation that can be done at a forest preserve (make sure to include an independent and dependent variable)
Answer:
What are the most effective new chemical treatments of various invasive species?
Explanation:
independent variable: chemical treatments
dependent variable: the type of species
why do the scientists feel comfortable with calling the hybrids a new species
Answer:
1 . They have the potential to interbreed in nature . 2 . They can produce viable offspring if they do interbreed—that is, their offspring are healthy enough to produce offspring of their own . and also its new,
Explanation:
An organism's phenotype is the way its _________ is expressed.
Which codon is the code for the amino acid valine (Val)?
Answer: A. GUC
Explanation:
Looking at the codon chart, we see that on the lower left corner (where first base in codon is G) the whole section matches to amino acid valine. Therefore, GUU, GUC, GUA, and GUG are all correct answers, but since GUC is the only correct choice in the four choices given, GUC is the answer to this question.
What reptilian taxon is extant (has at least some members that are still living; opposite of extinct)
Answer:
SquamataSource:
Chapter 34: The vertebrates - Quizlet1
Which two ways do the black-tailed jackrabbit and the kit fox interact with the
desert environment?
Select two correct answers.
A
Black-tailed Jackrabbits and Kit Foxes interact with the desert
environment by providing food for plants.
Black-tailed Jackrabbits and Kit Foxes use water and air from the
environment to survive.
B
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Black-tailed Jackrabbits and Kit Foxes obtain energy from consuming
other organisms.
Black-tailed Jackrabbits and Kit Foxes consume plants but do not
need the environment for survival
D
E
Black-tailed Jackrabbits and Kit Foxes meet their needs in their
environment by eating only plants for food.
Answer:
b
Explanation:
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In transcription what makes mRNA molecule by attaching free floating rna nucleotides together ???
Answer:
An mRNA transcript is made by an enzyme called RNA polymerase II
Explanation:
When you are getting too cold,
goosebumps and shivering leads to
heating of your body. Which type of
feedback loop is this?
А
a negative feedback loop
3
a positive feedback loop
Answer:
negative
Explanation:
Which of the following best describes daily temperatures in deserts? a. hot during the day and cold at night b. hot during the day and warm at night c. cool during the day and very cold at night d. they depend upon the type of desert and its location Please select the best answer from the choices provided A B C D
Letter "A" would be correct
Answer:
I think it's D..
Explanation:
There are different types of deserts.
What does tonicity mean
____ is the process in which light energy is transformed into food energy.
life
photosynthesis
abiotic
biotic
Option B: Photosynthesis.
Answer:
B
Explanation:
I did the test
5. a. What technology produced the results illustrated here, and what is this
technology used for? (1 point)
Think about the methods used to analyze DNA.
The technology that was used to produce the results illustrated in the image is gel electrophoresis and it is used for separating deoxyribonucleic acid (DNA) fragments.
Gel electrophoresis can be defined as a technology that is used in the laboratory for the separation of mixtures of deoxyribonucleic acid (DNA), ribonucleic acid (RNA) or other macromolecules such as proteins based on molecular size and charge.
In gel electrophoresis, an electric current is applied to the deoxyribonucleic acid (DNA) samples so as to create fragments that can be used to compare the various samples of deoxyribonucleic acid (DNA).
The steps involved in gel electrophoresis include the following:
Extraction of deoxyribonucleic acid (DNA).DNA isolation and amplification.Addition of deoxyribonucleic acid (DNA) to the gel wells.Application of an electric current to the gel.The separation of DNA bands based on molecular size and charge.Deoxyribonucleic acid (DNA) bands are stained.Read more: https://brainly.com/question/10413501
scientists often test their hypotheses with controlled experiments. which of these is a rule for conducting a controlled experiment?
a. change at least two variables at a time
b. keep all variables constant
c. change as many variables as possible
d. change only one variable at a time
Changing only one variable at a time is a rule for conducting a controlled
experiment.
Controlled experiment involves the use of dependent and independent
variables . Changes in the independent variable brings about a
corresponding change in the dependent variable which is then recorded.
It is however important to note that changing more than only one variable at
a time won't accurately determine if the changes in the results were as a
result of one cause. This is why only one variable has to be changed at a
time.
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Sea corals live exclusively in the ocean and are radially symmetrical. They have microscopic stinging barbs that shoot out to immobilize their prey. This allows corals to hunt even while they are stuck to the ocean floor.
What animal phylum do corals belong in?
chordates
mollusks
cnidarians
annelids
Answer:
phylum Cnidaria
Corals, anemones and jellies are related and all classified in the phylum Cnidaria or “stinging needles.” The animals in this group are aquatic, possess stinging cells within their tissues and have a body plan characterized by radial symmetry, which allows all parts of their bodies to be equally receptive and ...
Explanation:
Answer:
A. chordates
Explanation:
I need help please guys help me
Answer:
Choose a specific topic related to nutrition, and do some research on it (Wikipedia is always a good place to start). Maybe look at a few health blogs for inspiration and just to see the writing style (be sure not to copy them though!)
Answer:
Your topic (Nutritional blog post) explain the benefits of having proper nutrition and why should we do it. List down items we may sacrifice (ex. eating junk food) but the good effects this will bring us. Cite what will happen if we have healthy nutrition and back it up with evidence (Ex. A professional science study in 1993 has found that people who have healthy nutrition are less likely to disease [THIS IS ONLY EXAMPLE!]) Next, recommend some healthy foods or make a nutritional health diet for all the days in the week, balancing carbohydrates and giving the right amount of nutrition and calories.
Explanation:
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A single base substitution mutation is likely to have a less deleterious effect when the base change exhibits which of the following results
A single base substitution mutation will be the least likely to cause a deleterious effect when the base change produces the same amino acid as the original.
What is a silent mutation?This scenario is what we call a silent mutation. What this means is that the mutation is almost undetectable due to its not affecting the protein that it will help to form.This is possible thanks to how the genetic code operates, different codons are able to code for the same amino acid.Therefore, there are mutations that do not affect the amino acid or the protein.Therefore, we can confirm that a mutation will have no negative effects if it is a silent mutation, meaning that the substitution of a base pair happens to code for the same amino acid as the original.
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nvmhhudd<uldjddhssh?_______
Answer: nvrmndllhddy = wldjddpshh
PLEASE HELP ME WILL MARK BRAINLIEST LIKE GIVE ME THE REAL ANSWER
Which of the following distinguishes how options differ from futures In commodities markets?
Options are used to speculate against good pricing.
Options cannot be applied beyond a set volume of a good.
Options involve prices for goods set at the current time.
Options do not involve a requirement for a good to be purchased.
Answer:
I believe it is C I am not 100% though sorry if its wrong
Options and futures contracts are both derivatives, created mostly for hedging purposes. The key difference between them is that futures obligate each party to buy or sell, while options give the holder the right (not the obligation) to buy or sell.
write components of xylem and phylem ?
Hope you could get an idea from here.
Doubt clarification - use comment section.
3. If you drink a lot of water but do not consume additional solutes, how will the specific gravity of the urine be affected
please help meeèe I really need urs help
Explanation:
Science and technology help each other advance. Scientific knowledge is used to create new technologies. New technologies often allow scientists to explore nature in different ways and make new discoveries. Examples of technologies that have helped science advance include the telescope and microscope.
3. Cell membranes are made from
that are aligned to form hydrophobic and hydrophilic regions.
O A. fatty acids
O B. carbohydrates
O C. lipids
D. phospholipids
Answer:
c. ilpidos
Explanation:
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
1. The images below show embryos of different species at different stages of development.
Label the images below with 1-4 from least developed to most developed.
A. 4.
B. 1
C.
3
D. 2
2. Which image above do you think is a human? Explain.
Gizmo Warm-up
ont fambra from
The atomic mass of the most common isotope of magnesium is
Answer:
23.98504 or 24mg
Explanation:
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Rearrange the sentences into their most logical sequence to describe the process of energy extraction from glucose
Pyruvic acid passes from the cytoplasm into the mitochondrion.
A series of reactions break and rearrange carbon bonds to release energy and carbon dioxide.
Three molecules of ATP are produced with every pair of high-energy electrons that pass through the electron transport chain.
In total, about 36 ATP molecules are released from one molecule of glucose.
A small amount of energy is released when the bonds in a 6-carbon glucose are broken and rearranged into 3-carbon pyruvic acid molecules.
Answer:
A series if reaction break and rrarrange csrbon bonds to release energy ang carbon dioxide.
The correct sequence of energy extraction from glucose is 5, 1, 2, 3, 4 to complete the oxidation of glucose.
What is glycolysis?Thus, the phases of cellular respiration should be performed in the following order: Krebs cycle, oxidative decarboxylation, electron transport chain, and oxidative phosphorylation are the steps in glycolysis.
The process of energy extraction from glucose:
When the bonds in 6-carbon glucose are broken and reorganized into 3-carbon pyruvic acid molecules, a little amount of energy is produced. Pyruvic acid enters the mitochondrion from the cytoplasm.
Carbon bonds are broken and rearranged in a sequence of events that release energy and carbon dioxide.
Every pair of high-energy electrons travels through the electron transport chain resulting in the production of three molecules of ATP. One glucose molecule releases roughly 36 ATP molecules in total.
Therefore, the process of energy extraction from glucose start from pyruvate forming and end with the ATP formation.
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