What structures do all organisms have in common in the earliest stages of embryonic development
The early stages of embryonic development begin with fertilization. The process of fertilization is tightly controlled to ensure that only one sperm fuses with one egg. After fertilization, the zygote undergoes cleavage to form the blastula.
The formation of a zygote after fertilization and undifferentiated cell are common features during the earliest stages of embryo development.
In vertebrates, fertilization is the process by which two geminal cells fuse to form a zygote, which will develop into an adult organism.The cells are all in an undifferentiated state during the earliest stages of embryonic development.After this process, the cells begin to differentiate to form a defined structure known as gastrula.In conclusion, the formation of a zygote after fertilization and undifferentiated cell are common features during the earliest stages of embryo development.
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Cameron is a doctor treating a cancer patient, Billy is an archeologist dating a vase, and Isabelle is a geologist dating a layer of soil. Which isotopes would each person most likely use?
Sorry mate your question is very confusing
Do it again what is the question about
Answer:
B
Explanation:
What is a biodigester?
Pls answer...
Answer:
A system that biologically digests organic material
A biodigester is a system which biologically digest organic materials..
Define the following terms. A Emulsification. B Peristalsis. C Absorption. D Assimilation
Answer:
A] Emulsification - emulsification is the process of breaking down fat into smaller droplets which makes it easy for digestion.
B] Peristalsis - waves of muscular contraction that pushes food along the gut.
C] Absorption - process in which substances are taken in.
D] Assimilation - the process of absorbing minerals and other chemicals from food, usually for growth and repair of cells.
SOMEONEEE HELPPP MEEEE
Please help this will help me pass high school I just need this one answer please will like it
Answer:
B
Explanation:
What best describes the difference between anaerobic and aerobic respiration?
o Only aerobic respiration breaks down carbon dioxide.
Only aerobic respiration uses oxygen as a reactant.
O Only aerobic respiration occurs in humans.
o Only anaerobic respiration produces CO2.
Answer:
Aerobic processes in cellular respiration can only occur if oxygen is present.
Explanation:
Is rr genotype or phenotype
Answer:
Genotype
Explanation:
A plant with wrinkled seeds would have the following genotype: (rr).
PLS HELP ASAP DUE SOON PLS AND THANK U ILYSM IF U DO HELP.
Answer:
1. Yes and No. Speaking from the POV in which penguins are better of packed together than spread out since they are all focused on a specific region which is the southern hemisphere at the south pole I don't think spreading them out even when having the same exact species would help them survive since they need one another, but speaking in a different POV where multiple species are put in every cold region then yes it may work and it may also benefit in science fields to help ease the search of species and studies of them as well as the habitat of penguins themselves.
2. Penguins share many adaptations because of the idea of them only living in a cold, freezing region. Like, they spent half their time in water and the other half on land. Added to that, all penguins swim very fast due to webbed legs which helps them in surviving in a 100% water environment since Ice is technically frozen water. And they share many more adaptations all because of the cold region habitat they all share.
( I didn't really understand the 3rd one but Ill give it my own opinion )
3. Different geographical locations as I mentioned in the first question also speaks of how penguins wouldn't really survive much without being with their own species or their own type of penguins if that makes sense, although they are predators sometimes the environment might not give them the needed resources like food, warmth, strong legs to swim. Some baby penguins might grow up weak which would lead to weak physical structure which decreases the rate of survival because of not eating well nor keeping a healthy penguin routine that they usually do on the populated area of penguins in the southern hemisphere. So, weak physical structure leads to penguins not having their capabilities of being the predator in the environment and swimming as fast as others. Different environments and geographical locations may have an effect on this depending on penguin species but that's all I know.
I hope this helped :) .
Explanation:
"Immuno" refers to the immune system and deficiency means "a
lack of". What do you think immunodeficiency means and what might life be like for someone with
this problem?
Answer:
Given that, immunodeficiency could mean having a weak immune system. Which means the person would be prone to diseases. A person with immunodeficiency could be going through a hard time as they would have to make sure to stay healthy and be very health consious. They might also not go out to eat in restaurants due to the lack of cleanliness in the kitchens. If caught any disease they would have a hard time curing which could result to death at an unexpected age.
A row of elements on the periodic table is called a(n)
A. group.
B. period
C. Valence
D. orbital.
Answer:
B. Period
Explanation:
where are earthquakes most likely to occur?
A: Where a seismograph is located
B: human populations are densest
C: Where rock is at lowest temperature underground
D: Where rock experiences the most pressure underground
Most cells in the human body contain two sex chromosomes. Which type
of cell does not have two sex chromosomes?
Liver cell
Muscle cell
Nerve cell
Red blood cell
Answer:
liver cell
Explanation:
The liver parenchyma is primarily comprised of hepatocytes. Hepatocytes are polygonal epithelial cells with abundant eosinophilic, granular cytoplasm and large, centrally located round nuclei. Hepatocyte nuclei often contain a prominent nucleolus. Binucleated hepatocytes (= containing two nuclei) are not uncommon.
Why do some non-'ideal' traits exist in organisms?
Explanation:
They are helpful in mate selection rather than being mostly beneficial to survival
Why did the particles of insoluble titanium dioxide sink to the bottom?
Which group has the smallest dispersal distances
a) Seaweeds
b) Fish
c) Crabs
d) Marine Snails
Answer:
d) Marine Snails
Explanation:
Marine Snails has the smallest dispersal distance because of their slow mobility and stick to one place. These marine snails have very limited mobility when they are adults and spend their majority of lifetimes in a small geographical area. Dispersal distance refers to the distance a species can move from an existing place or population or the parent organism. According to this definition we can say that marine snails have the smallest dispersal distances.
A comparison of sexual and asexual reproduction is made by a group of students. Which statements accurately
support the argument that sexual reproduction is advantageous over asexual reproduction in many species? Select
all that apply.
A)
Sexual reproduction leads to greater mutation rate than asexual
reproduction
B)
C)
Sexual reproduction has a greater level of cell division than
asexual reproduction.
Sexual reproduction produces greater numbers of offspring than
asexual reproduction.
Sexual reproduction involves two parents which contribute
equally to the offspring's genetics.
Sexual reproduction involves meiosis and fertilization which
leads to increased genetic variation in the offspring.
D)
E)
Heredity and Reproduction
Answer:
D and E
Explanation:
Because two parents are involved, the rate of reproduction is lower in sexual reproduction, but it is beneficial to have increased genetic diversity in the offspring since the level of adaptations in phenotypes will be higher.
Hope it helped
The statements which accurately support the argument that procreation is advantageous over propagation in many species are given below:
Procreation involves two parents which contribute equally to the offspring's genetics.Procreation involves meiosis and fertilization which leads to increased genetic variation in the offspring.What do you mean by Species?Species may be defined as a group of organisms that can reproduce naturally with one another and create fertile offspring.
Due to the involvement of two parents, procreation increases the genetic diversity among organisms.
In procreation, clutch size is low but parental care is high. It means that this type of reproduction does not produce a large number of offspring.
Therefore, it is well described above.
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State four (4) differences between a plant cell and an animal
Can someone write the first paragraph
Hii!!
The purpose of mitosis is to create two new perfectly identical cells when either there is a need to replace old or damaged cells and to reproduce asexually by making new cells. Some organisms use mitosis to replace body parts. For example starfish replace lost arms by mitosis. Some organisms such as the hydra use mitosis to produce genetically identical offspring.
There are four stages of mitosis: prophase, metaphase, anaphase and telophase.
1) Prophase: chromatin into chromosomes, the nuclear envelope break down, chromosomes attach to spindle fibres by their centromeres
2) Metaphase: chromosomes line up along the metaphase plate (centre of the cell)
3) Anaphase: sister chromatids are pulled to opposite poles of the cell
4) Telophase: nuclear envelope reforms, chromosomes unfold into chromatin, cytokinesis can begin
● The order of the stages of mitosis can be remembered using the mnemonic PMAT.
Hope this helps!! if it has pls mark me as the brainliest Xd :D
Emest Rutherford's atomic model included a nucleus comprised of positive particles called protons. Later, James Chadwick discovered neutrons. How did
Chadwick's discovery change the atomic model?
A The new model showed a negatively charged nucleus.
B. The new model showed a neutrally charged nucleus
C. The new model showed a larger electron cloud.
D. The new model showed a nucleus with two types of particles
Answer:
D
Explanation:
It can't be A as nuclei must be positive.
It can't be B as nuclei must contain at least one proton, and no electrons.
Technically C may be true, but the question is asking about the nucleus. Not the electron cloud. Electrons aren't found in the nucleus. Only protons and neutrons.
help please!!! it’s due in 2 hours!
Explanation:
1.) The action of admitting someone into a secret and obscure society or group, typically with a ritual.
2.) The action or process of lengthening something.
3.) The action of termination something or the fact of being terminating.
can someome give me tje answer?
Answer:
100%
Explanation:
Homzyg. tall = TT
Homzyg. short = tt
This is the Punnett square:
| T | T
t | Tt | Tt
t | Tt | Tt
All the possible combinations are Tt, so its 100%.
II. Write TRUE if the statement is correct and FALSE if not.
11. The flower of mongo beans is self- pollinating.
12. Most ferns reproduce sexually using spores.
13. Pine tree has flowers.
14. Rose, santan , daisy can be reproduced through leaves.
Answer:
11. i don't know
12.false. Asexually
13.false. no flower
14.false. stems
Title: Does temperature have an effect on growth rate of crystals? what about leaving them covered or uncovered? Does dry air or moist air seem to grow more crystals
Hypothesis:
IF
THEN
BECAUSE
Help pls
Answer:
Temperature also affects the growth of crystals because "the higher the temperature, the warmer the crystal solution will be, and the faster its molecules will move. This movement allows them to evaporate more quickly, leaving particles behind to form into crystals.
Explanation:
A Warm and Light Atmosphere
Warm air temperature aids water evaporation, causing the crystals to grow more quickly. Crystals will still grow in cooler temperatures, but it will take much longer for the water to evaporate. Crystal growth also requires light.
What sentence that is true about Charles Darwin.
a. He was born in 1809.
b. He was an English naturalist.
c. He was 42 when he began the voyage on the Beagle.
d. The voyage lasted five years and took him around the
world
Answer:
I think it's D but I'm not sure
Which of the following could result if meiosis did not occur in the process of sexual reproduction?
A. Chromosomes would not be copied exactly.
B. Chromosomes would no longer contain genetic information.
C. Chromosome number would decrease with each generation.
D. Chromosome number would increase with each generation.
Answer:
B
They wouldnt have abilizy to propagate themselfs
The other option is "parent 1: RR; Parent w: rr
Answer:
Parent 1: Rr, Parent 2 Rr
Explanation:
Possible genotype for RR and rr is Rr
Possible genotypes for RR and Rr are RR and Rr
Because one of the offspring from parent 1 and 2 is rr, we can decide that Rr must be parent 2 because there would need to be one r from each parent.
If there are 250 puppies born for every 1,000 dogs in a year, what is the per capita birth rate?
Answer: d
Explanation:
Answer: 0.25 puppies
Explanation:
Per capita birth rate is calculated as individuals born per existing individual.
Please help! Just one question! :)
Answer:
semiconservative
Explanation:
Biotechnology helps decrease ______
by reducing amounts of chemicals absorbed from pesticides and herbicides
O shipping time
O taste
O spoilage
O pollution
Answer:
pollution I took the quiz