Jack observes the development of frog eggs. During his observations, he noticed that within a few hours of fertilization, the single-celled zygote went through a series of cell divisions. Which of these is the best interpretation?
A. gastrulation
B. blastulation
C. cleavage

Answers

Answer 1
The answer is C. cleavage.

Soon after the zygote is formed, the first cleavage occurs and the 2-cell stage is formed. The second cleavage forms the 4-cell stage and the third cleavage forms the 8-cell stage, and so on. A hollow ball of thousand cells is called blastula. After blastulation, during gastrulation three distinct germ layers are formed.

Related Questions

How do the animals in an ecosystem MAINLY acquire the sun’s energy? A) They absorb energy through their skins. B) They obtain energy when they drink water. C) They obtain energy trapped and stored by plants. D) They can convert the Sun’s energy into chemical energy.

Answers

The answer is d and it's called photosynthesis

Answer:

d is incorrect is c they obtain energy trapped and stored by plants.

why is it possible for a bacterial cell to make a human protein from the instructions encoded in a human gene

Answers

Protein synthesis in bacteria is controlled by the plasmid. We may alter the structure of the plasmid to incorporate a human gene by the help of enzymes. The bacteria's plasmid will then contain the information to produce human protein.
The simpler nature of the bacterial genetic material allows us to do this.

Question: Is the cell in the diagram eukaryotic or prokaryotic? Explain your answer using the defining characteristics of cells. Mention structural features of the diagram that support your answer.

Answers

If the cell is prokaryotic, there will be no nucleus present; prokaryotic cells have a cell wall, flagella, and pilus. Eukaryotic cells have a nucleus, no cell wall, and contain more organelles than prokaryotes; they are more complex.

Hope this helps! :)
Final answer:

Eukaryotic cells have a defined nucleus and other specialized organelles enclosed in membranes. Prokaryotic cells, however, lack a nucleus and other membrane-bound organelles. The cell type can thus be determined from these structural features.

Explanation:

Without being able to view the actual diagram, it is difficult to confirm whether the cell shown is eukaryotic or prokaryotic. However, I can provide the defining characteristics of both. Eukaryotic cells possess a defined nucleus, where genetic material is stored, and other specialized organelles, both of which are typically enclosed in membranes. Prokaryotic cells, on the other hand, do not contain a nucleus and lack other membrane-bound organelles. So when you mention structural features in the diagram, look for presence of a nucleus and other organelles for eukaryotic cells and absence of these for prokaryotic cells.

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Why is it important to control the variables you are not testing ?

Answers

It is important because the results would not be reliable since other variables you are not testing could have been in affect.
Hope this helps(;

What type of muscle tissue is found in the heart? Compare the distinguishing properties of this muscle to other muscle tissue types.

Answers

The type of muscle found at the heart is the cardiac muscle tissue. This tissue has the phyical striped characteristic of a skeletal muscle tissue and works like a involuntary muscle because it works without our control

This type of tissue is packed wirh mitochondria which provides it with alot of energy. This is very crucial becaise the heart has to constantly beat

Final answer:

The heart consists of cardiac muscle tissue, which can contract on its own without nervous system stimulus, unlike other muscle tissues. Skeletal muscle, controlled by conscious decisions, moves the skeleton. On the other hand, smooth muscle is involuntary and is located in places such as digestive tract and blood vessels.

Explanation:

The type of muscle tissue found in the heart is called cardiac muscle. It is unique and different from other muscle tissues in that it has the ability to contract on its own without nervous system initiation, a property known as automaticity or inherent rhythmicity.

Comparatively, skeletal muscle tissue is associated with the skeletal system. It is voluntary, meaning its contractions can be consciously controlled. And like cardiac muscle, skeletal muscle is striated, or has a banded appearance due to the organized arrangement of proteins within the muscle cell.

The third type of muscle tissue is smooth muscle. Unlike the other two, it lacks striations and its contractions are involuntary. This tissue type is found in places like the walls of blood vessels and the digestive tract where it helps to propel food along.

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. Leila and Liam are twins and spent their 16th birthday at their favorite amusement park. After riding the biggest and fastest roller coaster in the park, Leila and Liam feel very dizzy and disoriented. Which of the following would play the biggest role in these feelings?

olfactory receptors
basilar membrane
semicircular canals
cones and rods
sensory receptors of the joints

Answers

The Semicircular Canals in their ears

The correct answer is C. Semicircular canals.

Explanation

The semicircular ducts are a part of the inner ear, they are small ducts that contain fluid inside. The semicircular ducts work when they undergo a movement, causing the liquid inside to move and touch the small hairs inside. These hairs send a nervous signal to the brain so that it determines how to maintain the body's balance.

An example of this is the case of Leila and Liam, who underwent a roller coaster movement, causing the liquid in their semicircular ducts to move and touch the hairs in the ducts, sending a nervous message to the brain, this continues even when they get off the roller coaster, that is why Leila and Liam continue to feel that sensation of movement and dizziness. So, the correct answer is C. Semicircular canals.

What is the main function of cuticle in plants?
1. It prevents water loss.
2. It absorbs sunlight.
3. It protects the plant from predators.

Answers

1. It prevents water loss is the correct answer

The Correct Answer is: A.It prevents water loss.


1. What caused dissolved iron to rust and deposit in banded iron formations?

a. outgassing

b.oxygen released by living cyanobacteria

c. huge amounts of rain

d. an asteroid impact

2. Which of these was the first source of oxygen in our atmosphere

a. Oxygen produced by living things on land

b. Oxygen released by volcanoes

c. Oxygen released by living cyanobacteria in the ocean which then was released into the atmosphere

d. the original accretion of the Earth

Answers

an original accretion of the earth

Oxygen released by living cyanobacteria caused dissolved iron to rust and deposit in banded iron formations. This implies the correct answer is B.

The first source of oxygen was the oxygen released by living cyanides in the ocean which then was released into the atmosphere. This implies the correct answer is C.

Further Explanation

Question 1:

Banded iron formations are the major part of sedimentary rock. These formations are of always of the earliest part of the earth’s history also known as Precambrian age.

The general theory is that banded irons layers were developed in seawater due to the oxygen that was released by cyanobacteria. The oxygen that was released then joins with dissolve irons to form insoluble iron oxide and a thin layer on the floor of the ocean.

Most of the oldest rock formations and linked with banded iron formations and they are made up of approximately 60% of global iron reserves.  Banded iron formations can be found in the following places: United States, Ukraine, South Africa and many more.

Question 2:

The first source of oxygen is oxygen released by living cyanides in the ocean which then was released into the atmosphere.

The first microbe to produce oxygen in our atmosphere is known as Cyanobacteria. Cyanobacteria or blue-green algae produce the first oxygen about 3.5 billion years ago by photosynthesis.

LEARN MORE

What caused dissolved iron to rust and deposit in banded iron formations? https://brainly.com/question/2389963One of the most recognizable corrosion reactions is the rusting of iron https://brainly.com/question/12520349

KEYWORDS:

banded iron formationscynobacteriaoxygenatmosphereocean

What is the most important organ in human body?

Answers

the heart

hope it's fine :P
every vital organ like brain,heart,lungs are important. of one is missing none works.

what is equal to Velocity change per second

Answers

Expedition/Acceleration is the rate of change for velocity and the velocity that changes per second.

Best of luck~ Sans

Answer:

Acceleration

Explanation:

The rate of change of velocity is known as acceleration. Acceleration is the rate of increase/decrease in motion, action or speed

Suppose the initial speed of any object is [tex]v_0[/tex] and the final speed of any object is [tex]v_f[/tex] and the object changes this speed in a time period of [tex]t[/tex] seconds, then the mathematical formula for acceleration would be

[tex]a= \frac{v_f-v_0}{t}[/tex]

where, "a" is the acceleration

The unit of acceleration if meter per second square.

Nearly all of the plant tissue called ______ is made up of cell walls. (fill in the blank)

Answers

The word that misses in the blank is cellulose. Remember that almost all of the plant tissue called cellulose is made up of the cell walls. This is a specialized sugar, and is not used for energy. Hope this can help you

Why do farmers want their plants to do as much photosynthesis as possible?

Answers

Farmers want their plants to photosynthesise as much as possible in order to increase their crop rate.

Without enough light, a plant cannot photosynthesise very quickly, even if there is plenty of water and carbon dioxide. Increasing the light intensity will boost the speed of photosynthesis.

Sometimes photosynthesis is limited by the concentration of carbon dioxide in the air. Even if there is plenty of light, a plant cannot photosynthesise if there is insufficient carbon dioxide.

If it gets too cold, the rate of photosynthesis will decrease. Plants cannot photosynthesise if it gets too hot.

Farmers can use their knowledge of these limiting factors to increase crop growth in greenhouses. They may use artificial light so that photosynthesis can continue beyond daylight hours, or in a higher-than-normal light intensity. The use of paraffin lamps inside a greenhouse increases the rate of photosynthesis because the burning paraffin produces carbon dioxide, and heat too.


Final answer:

Farmers aim to maximize photosynthesis in crops to increase food production and improve crop yield. Photosynthesis, reliant on sunlight, water, and CO₂, is crucial for plant growth and fruit production, impacting the overall success of agricultural activities.

Explanation:

Farmers want their plants to do as much photosynthesis as possible because it directly impacts food production and overall crop yield. Photosynthesis transforms sunlight into chemical energy, which plants use to grow and produce fruits, vegetables, and grains. The process is dependent on various factors including sunlight, water, and carbon dioxide (CO₂). Optimal photosynthesis conditions can be influenced by the environment's abiotic components, leading to high biomass production, which in turn supports a richer harvest and provides valuable resources such as habitat and food to other living beings. Specifically, crops like tomatoes require maximum sunlight for significant production, highlighting the importance of photosynthesis in agricultural success. In addition to sunlight, water plays a crucial role in photosynthesis by participating directly in the chemical process and helping to transport nutrients throughout the plant. However, both too little and too much water can adversely affect photosynthesis rates and plant growth. By maximizing photosynthesis, farmers can improve plant health, increase biomass production, and ultimately enhance the quantity and quality of their crops, effectively supporting both human and animal communities.

Hydrophones help scientists listen to and record sounds from the ocean. Which statement best describes how ocean water affects sound waves?

Answers

 If you're talking about sound waves in ocean water, the effect of high pressure (which is to increase the sound speed) overwhelms the effect of low temperature (which is to decrease the sound speed). 

WIlson's equation for the speed of sound in ocean water as a function of salinity, temperature, and pressure appeared in the Journal of the Acoustic Society of America in 1960. 


I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

Answer:

It should be: High water pressure increases the speed of sound.

All types of respiration starts with the process of _______________, where glucose is broken down to form pyruvic acid.

Answers

it would be glycolysis

What does the term carrying capacity describe?

Question 15 options:
The maximum number of birth rates for a population.
The ability of a population to accept new immigrants.
The population size that the environment can sustain.
The ratio of birth rates to death rates in a population.

Answers

The population size that the environment can sustain. Hoped i helped:)

Answer: The population size that the environment can sustain.

Explanation:    

The carrying capacity can be defined as the maximum number of individuals of the population of a species which an ecosystem can support and sustain in terms of availability of resources such as water, food, shelter and other needs. When the population of the species exceeds the carrying capacity of the ecosystem the population starts declining to maintain the number which a carrying capacity of the ecosystem can sustain. On the basis of the above information, The population size that the environment can sustain. is the correct option.

Are marsupials mammals that lay eggs?

Answers

No, marsupials are mammals like opossums, kangaroos, wombats, and bandicoots who all have pouches and give birth to live young that are not ready to live in the outside world until later as they are not fully developed. Therefore they live in their mothers pouches until they are mature enough. They mainly live in Australia, New Guinea and America.

Sascha notices that steam appears from water only when the water is very hot. What property of water explains this observation?

Water has a high vapor pressure.
Water is densest as a liquid.
Water has a low boiling point.
Water has a high heat capacity.

Answers

water has a high heat capacity is the correct answer

The answer is definately that water has a high heat capacity

Which type of gene is likely to be widely expressed in the body of someone who contracts the influenza virus?

Answers

The gene that controls production of white blood cells is likely to widely expressed.

Answer:

The gene that is likely to be widely expressed in the body of someone who contracts the influenza virus is:

The gene that controls the production of white blood cells.

Explanation:

The reason behind this is because the influenza family viruses attack the human body on a cellular level. Therefore, our immune system has to adapt to it and learn how to defeat them. Now, the cells that form part of the immune system are the white cells. That is the reason behind our answer.

1. What are some of the challenges that those working in wildlife rehabilitation face in treating animals?

Answers

Some challenges of those who work in wildlife are having to get use to the outdoor and mosquito bites, getting the animals use to them so they do not bite, and Getting used to heat

One of the greatest difficulties in wildlife rehabilitation is not being able to support every animal. Sometimes, despite doctors' and rehabbers' real efforts, animals are not able to be discharged. In order to survive in the wildlife and be releasable, animals require to be 100% healthy. If a bird could not fly, or a mammal could not see, wildlife rehabilitators could not free them back to the wild because they will not sustain.

Wild mammals don't have masters that pay the bills for their treatment. Most wildlife rehabilitators and dispensaries depend on charity from human sponsors to fund for the food, medications, and other supplies they require to care for wild animals. Finding the money required to treat and rehabilitate wildlife can be very challenging.

Injured or ill creatures in custody can be a menace to those attempting to help them. Birds of prey like falcons and owls have powerful feet with sharp hooks that can harm people. Many creatures like raccoons and even squirrels can nibble very hard.

meteorology is best defend as

Answers

It is best defined as the branch of science concerned with the processes and phenomena of the atmosphere, especially as a means of forecasting the weather.

Hope that helps :)
The study and observation of the weather

A collision with a large meteorite may have contributed to the mass extinction at the end of the _____ era.

Answers

Answer;

Mesozoic

A collision with a large meteorite may have contributed to the mass extinction at the end of the Mesozoic era.

Explanation;The Mesozoic Era is the era known as the age of the dinosaurs and lasted almost 180 million years. Mesozoic Era consist of three periods namely the Triassic, Jurassic, and Cretaceous periods. The beginning and the end of Mesozoic Era was marked by a mass-extinction. It is believed that the mass extinction was caused by a meteorite impact, that caused the end-,Mesozoic extinction. The mass extinction wiped about 95% of marine life and 70% of land life. This mass extinction caused the transition from the Paleozoic era to the Mesozoic era.

What do most expirements test?

Answers

it can never prove hypothesis it can only add suport
Final answer:

Most experiments test hypotheses through repeatable experiments. In biology, scientists test various hypotheses related to living organisms and their functions.

Explanation:

Most experiments test hypotheses by conducting repeatable experiments. In biology, for example, scientists conduct experiments to test various hypotheses related to living organisms and their functions. For instance, they may test the impact of different variables on the growth rate of a certain plant species. By conducting experiments and analyzing the results, scientists can gather evidence to support or refute their hypotheses.

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as you drive along the roadside, you and your friend notice a dead deer that apparently was struck by a car. Your friend comments that she has never seen such a fat deer. "Did you see the size of its abdomen? It was huge!" As a student of forensics, how would you explain to your friend why the abdominal region of the dead deer was so large? CSI

Answers

If it is the abdomen and not the stomach area i would say its from the heat. if you've ever seen a dead animal on the side of the road over the course of a few days, they start to swell from the sun beating down on them all day.

Answer : The size of abdomen appeared to be huge because it stored stomach and many visceral organs.

When the dead deer was spotted by the person it appeared to be much bigger than usual because when the deer was hit by the car it remained there for several hours or may be days and nobody cleared that; From the sun's heat which was falling on the dead deer's body the internal organs were heated up, making them swelled and enlarged than their usual size.

The slowest type of mass movement, which involves the lifting and contracting of soil particles over time, is called

a.) a rockslide
b.) an earthquake
c.) creep
d.) rockfall

Answers

HI there

i believe the answer is creep creep takes a long time to do its job so i believe this is your answer

hope this helped you!

which of the following ecosystem factors is considered biotic?
a.temperature range
b.predator
c.mineral types
d.water chemistry

Answers

The answer is B, predator. Thank you. 
Final answer:

In an ecosystem, a predator is considered a biotic factor, as it is a living organism that impacts other organisms in its environment. While temperature range, mineral types, and water chemistry are important, they are abiotic (non-living) factors.

Explanation:

In an ecosystem, factors can be either biotic (living) or abiotic (non-living). Out of the options given, predator is considered a biotic factor. Biotic factors are all the living organisms that inhabit an environment, including animals, plants, fungi, and bacteria. A predator is an example of a biotic factor because it is a living organism that impacts other organisms in the ecosystem through predation.

Other options like temperature range, mineral types, and water chemistry are considered abiotic factors because they are non-living factors that also play a major role in the ecosystem.

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Please Help Me!!!!!!!
Use Biological Evolution in a sentence

Answers

It is true that studies of animals show that they play only when the physical survival needs have been met; however, there is growing evidence that for children, play is crucial in terms of biological evolution as well as individual development. 

Justify "Chemical reactions occur faster with the presence of enzymes as long as the conditions are ideal"

Answers

enzymes make the requirement of activation energy be lower. it's not only faster, it requires less energy

The steady flow of electrons through a conductor is

Answers

The steady flow of electrons through a conductor is a electric current.


___________ of glucose produces glycogen, the storage form of sugar, found in the liver and muscles.
A)
Diffusion
B)
Lysis
C)
Polymerization
D)
Reoxygenation

Answers

The answer is C) Polymerization

Glycogen is a polysaccharide made up of glucose. It is a polymer so it is produced by polymerization of its basic units. Glycogen is the polymer (polysaccharide) produced by polymerization of glucose.

Do the trees in your area have much chlorophyll in them right now? Do you think the trees in your area will have more or less chlorophyll in three months than they did now?

Answers

The trees in my area have less chlorophyll, the thing that makes plants green, because we are currently in fall which is when trees start to "fall asleep" because winter is coming meaning there will be less sunlight and trees, therefore cannot produce enough glucose to sustain themselves, that's why they instead "fall asleep" and lose all their leaves, it's to store energy so they'll be ready to reproduce and continue with photosynthesis in the spring. They'll definitely have less chlorophyll because we'll be in the dead of winter.

Answer:

The trees in my area do have much chlorophyll, and are starting to turn more green now that the winter has passed. This is because it's currently spring. During this time there's more sunlight and many trees, along with enough glucose to sustain them. Now, photosynthesis is taking place, and trees are reproducing. So yes, I do think that in 3 months it'll be summer, and there will be even more sunlight and chloroplast in the trees.

Explanation:

Isn't it funny that now you have an answer if it's fall or spring where you live?

Don't write the exact same thing because I just gave this to my teacher in a-p-e-x in march 2021. So please, our teachers are smart.

Hope this helps! :D

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daphne was given a riddle to solve the sum of two consecutive positive integers is 71 find the two positive integers Anna waters her plants with salty water to help them grow better. Is her thinking correct? No. The salt will interfere with absorption of water and the plants will die. No. The salt will cause the water to diffuse out of the plants and they will wilt. Yes. Salt will increase the water uptake of the plant. Yes. Salt will provide the plant with sodium and chloride ions. Which of the following is a true statement about the map? The border between California and Nevada is a thin, black line; this indicates a state boundary. The border between California and Nevada is a thin, blue line; this indicates a natural river boundary. The border between California and Oregon is a thin, blue line; this indicates an international boundary. The border between California and Nevada is a thin, blue line; this indicates an international boundary. In two to three sentences, summarize Stalin's Paranoia and the actions that came about as a result Enlightenment writers often faced censorship because they a. wrote fiction. b. wrote in salons. c. supported traditional ideas. d. challenged the old order. Balance this equation. If a coefficient of "1" is required, choose "blank" for that box.C2H4 + O2 CO2 + H2O Jordan and Jake each work during the summer. Jordan earns $9 per hour at her job. Jordan also gets a $10 weekly allowance. Jordan displayed her earnings in a table. Hours: 0 1 2 3 4 5 6 7 8 Earnings: 10 19 28 37 46 55 64 73 82 Jake earns $6.50 per hour at his job. Jake also gets a $15 weekly allowance. Jake displayed his earnings in a graph. How many hours will it take for Jordan and Jake to earn the same amount of money? I am desperate!!! daniel team scored 40 points at the game danielscored 50% of the teams points how many poits did daniel scored Which is a product in the following chemical reaction? CH4 + 2O2 CO2 + 2H2OCH4H4H2OO2 In "I, Too," why does the speaker say "they" will be ashamed?A) because they are not as beautiful as the speaker B) because they realize that the person they dismissed is actually beautifulC) because they wish they were as intelligent as the speakerD) because they have their meals in the kitchen Which of the following polymers is found in cell membranes? a. lipids b. dna c. rna d. glucose Circle the analogy that BEST matches the bold words.CHRONICALLY: RARELYa) repeated : patternb) late : neverc) friends : familyd) easy : difficult The Old Kingdom, Middle Kingdom, and New Kingdom are significant because: they span the entire history of ancient Egyptthey span the entire history of Egypt, from ancient times until the presentthey are the only periods of Egyptian history during which the pharaohs ruled the landthey represent the periods of peace and prosperity during which the arts flourished the most How did the invention of rag paper aid the Zhou and Han dynasties?A.It aided the growing bureaucracies and their need for endless documentation.B.It allowed the expansion of the philosophy of legalism.C.It prompted construction designs for the Great Wall of China.D.It was used with the abacus for all simple math computations. What does paradox mean? To make a dark orange color , Ron Mixes 3 oz of red paint woth 2 oz of yellow paint . Write the ratio of red paint to yellow paint three ways . Let f(x) = 7x 13. find f1(x). (1 point)13x 77 over quantity of x plus 13quantity of x plus 13 over 71 over quantity 7 x minus 13 why is the killiing of american indians by european colonist and explorers between the 15 th and 19 th centuries consideed genocide Identify the type of conjunction in the following sentence.Jamie turned the air conditioner down; consequently, the house was cold when they returned.conjunctive adverbcoordinating conjunctioncorrelative conjunctionsubordinating conjunction List the major productivity changes in shipping during the colonial period:1. __________________________2.__________________________3.__________________________4.__________________________5.__________________________