Answer:
prophase 1(Homologous chromosomes pair to form a tetrad.
prophase 1(Crossing-over may occur between the non-sister chromatids).
Metaphase 1 (Homologous chromosomes line up at the center of the cell.)
Anaphase 1 (Homologous pairs separate and move towards opposite ends of the cell)
Telophase 1 (A nuclear membrane forms and cytokinesis follows).
Metaphase 2 ( The haploid number of duplicated chromosomes line up at the metaphase plate.
Anaphase 2 (Sister chromatids separate and become daughter chromosomes that move to the poles)
Meiosis 2: Four haploid daughter cells are formed that are not genetically identical.
Explanation:
Meiosis is a type of cell division that gives rise to gametes ( offsprings). This type of cell division occurs only in the reproductive organs. A diploid cell has two sets of chromosomes: one from the female parent and the other one from the male parent. When the diploid cell undergoes meiosis, the chromosome replicate once and the nucleus and cell duplicate twice giving rise to four haploid gamete cells.
The phases of meiosis occurs in two step divisions. Homologous pairs separate during the first round cell division which occurs in MEIOSIS 1 while the sister chromatids separate in the second nuclear division called MEIOSIS 2.
In each round of division, cells go through four stages: PROPHASE, METAPHASE, ANAPHASE, and TELOPHASE. The specific events that occur in these stages are already listed in the above answer.
Generally, at the start of meiosis, each member of a homologous pair of chromosomes, which are made up of two chromatids, moves to lie side by side. While they are thus paired, genetic material is exchanged between the chromatids. This is known as CROSSING OVER.
When the nucleus divides for the first time, the chromosomes in a given pair( not the chromatids) separate and move to opposite ends of the cell. This results in only half the number of chromosomes going to each daughter cell.
During the second nuclear division, the chromatids separate and move to opposite ends of each daughter cell giving rise to four gamete cells, each with a haploid number of chromosomes.
Meiosis is the process through which haploid gametes are formed from a diploid germ cell. It takes place in two phases of four steps each: prophase, metaphase, anaphase and telophase.
---------------------------------
Through Meiosis, a diploid cell (2n) produces four haploid daughter cells (n).
After DNA replication there are two meiotic phases.
The first one is a reductive phase, in which homologous chromosomes separate.
In the second phase, the cell suffers a new, not reductive division.
1. In the first phase, Meiosis I:
Prophase I: Chromosomes condensate and become visible. Occurs crossing-over between homologous chromosomes. Crossin-over makes the daughter cells to be genetically different from the original one. Metaphase I: Homologous chromosomes randomly align in the equatorial plane. Anaphase I: In this phase occurs the division and independent separation of homologous pairs. Each chromosome migrates to different poles. This separation generates different chromosomal combinations in the daughter cells. Telophase I: Chromosomes of homologous pairs are already in the corresponding poles, and the nuclear membrane forms again in each pole.2. In the second phase, Meiosis II:
Prophase II: Chromosomes condensate again and become visible. Metaphase II: Chromosomes join the spindle apparatus and migrate to the equatorial plane, where they randomly line up. Sister chromatids are holden together until they reach the Anaphase. Anaphase II: Centromeres divide, chromatids get separated, and each of them goes forward an opposite cellular pole. Telophase II: Once in the poles, the chromosomes become lax again, and the nuclear membrane forms again.Cytokinesis occurs at the end of Meiosis II. The final products are four haploid cells different from the original one.
According to this information, the correct order would be as follows
Prophase 1: Homologous chromosomes pair to form a tetrad.Prophase 1: Crossing-over may occur between the non-sister chromatids.Metaphase 1: Homologous chromosomes line up at the center of the cell.
Anaphase 1: Homologous pairs separate and move towards opposite ends of the cell.Telophase 1: A nuclear membrane forms and cytokinesis follows.Metaphase 2: The haploid number of duplicated chromosomes line up at the metaphase plate.
Anaphase 2: Sister chromatids separate and become daughter chromosomes that move to the poles.Meiosis 2: Four haploid daughter cells are formed that are not genetically identical.
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Related link: https://brainly.com/question/7002092?referrer=searchResults
Regulates body activities using hormones...
A. Nervous
B. Excretory
C. Endocrine
D. Reproductive
84. The carries blood rich in nutrients and oxygen to the fetus.
Answer:
The umbilical cord? (might be wrong tho)
Answer:
The umbilical vein carries oxygenated, nutrient-rich blood from the placenta to the fetus, and the umbilical arteries carry deoxygenated, nutrient-depleted blood from the fetus to the placenta
Explanation:
hope it becomes helpful to you ☺️☺️
good luck
What Relative Dating technique refers to missing rock records?
Answer: Fossils and relative dating
Explanation: Land and rock experts have studied the order in which (things in rocks that lived a long time ago/old, outdated things) appeared and disappeared through time and rocks. This study is called biostratigraphy.
Answer:
Give that guy brainly ^
Explanation:
:)
All of the following are examples of convection currents, except
Answer:C, water flowing through pipes
Explanation:the answer is C because convection is when molecules are traveling from one place to another place instead of jiggling back and forth, so when water flow through the pipe it’s the substance that is moving which makes it wrong and an answer!
Answer:
C
Explanation:
Identify the 3D shape shown below.
Choose 1 answer:
Rectangular prism
Square pyramid
Triangular prism
The 3D figure is a triangular prism
Answer:
The answer is C (Triangular Prism)
Explanation:
If you wanted to study the effects of soil moisture and light intensity on the growth of soybeans and required a high ability to regulate these independent variables, what type of experiment would you choose?A. Laboratory experiment.
B. Field experiment.
C. Natural experiment.
D. Reference experiment.
Answer:
A
Explanation:
The correct answer would laboratory experiment.
In the laboratory, variables can be controlled as much as possible using relevant equipment unlike in natural habitats or field experiments. For example, the amount of water that each plant would receive can be measured using measuring cylinders and the time they are applied can also be fixed.
Field and natural experiments require that experimental procedures are carried out in the field under natural conditions. Consequently, variables such as the amount of moisture that gets into the soil or the amount of light a plant will receive will be extremely difficult to control. Precipitation time and the duration of light can also not be controlled.
The correct option is, therefore, A.
PLSSS IM BEGGING
Where do producers get energy to make sugars?
The air
The sun
Their food
The soil
Using genetic code table translate this mRNA sequence. AUG CUU AAG GGU CGU CAU UAG.
Answer:
Explanation: g
The temperature at which air becomes saturated with water vapor is called the _____.
the dew point
is the point were air is saturated with water vapour, which is the gaseous state of water.
hope it's perfect for you.
The nucleus of an atom comprises of _______________ and _______________
Answer: protons and neutrons
Explanation:
Answer:
positively charged protons and neutral charged neutrons.
Explanation:
As a plant grows, new root hair cells are formed from unspecialised cells.
How does an unspecialised cell become a new root hair cell?
Answer:
Root hairs appear in the root maturation zone and differentiate from unspecialised cells called trichoblasts.
Explanation:
Root hair arises as a small protrusion surrounded by a cell wall, they are found in the piliferous area; they can originate in unspecialised epidermal cells, in some called trichoblasts. The bump begins to elongate and moves away from the epidermis, forming root hair. The root hairs as they lengthen, it is seen that their content shows a polarized distribution, the apical part is constituted mainly by vesicles secreted by the Golgi apparatus that contain the precursors of the cell wall that are to be released by exocytosis. Trichoblasts can be arranged in different ways, there are roots where any of the cells that are part of the rhizodermis can give rise to a root hair. In other roots, trichoblasts and atricoblasts have been seen to be distinguished alternately along a row of cells.
Question 4
Place the following in correct developmental sequence:
1. reticulocyte
2. Proerythroblast
3. hemocytoblast
4. erythroblast
3.2.4.1.
3.1.4.2.
2.3.4.1.
2.1.3.4.
.3.1.4.2
-3. hemocytoblast
-1. reticulocyte
-4. erythroblast
-2. Proerythroblast
give me the definition of natural selection
a natural process that results in the survival and reproductive success of individuals or groups best adjusted to their environment and that leads to the perpetuation of genetic qualities best suited to that particular environment
Which of the following does not explain why if two people are exposed to the same high stress causing conditions, there is a likelihood that they will not be affected the same way? A) the two have different lifestyles B) some people are not at all affected by stress C) gene-environment interactions may affect the level of depression D) people react differently to stress E) presence of a specific gene variation
Answer:
Probably B
Explanation:
They all explain it, honestly, but B sounds the least like an answer they would accept as true. It's also kind of sus that they have 2 different answers about reacting differently to stress, and B is definitely the least likely of the two to be correct. Sorry I couldn't be more helpful, I'm only here because I searched for the answer myself. Good luck.
In humans, there is a dominant allele that causes vitiligo, where small-unpigmented spots appear on the body. Also, there is a recessive allele for another gene that caus- es albinism, which causes the entire body to be unpig- mented. Vitiligo cannot be seen in albinos. A man with vitiligo had an albino mother and normal father. If the man has a child by a phenotypically normal skinned woman who had an albino father, what is the probability of having a phenotypically normal child
Answer:
probability = 0
Explanation:
The probability of having a phenotypically normal child is = 0
This is because since the Paul has Vitiligo and the vitiligo ( allele ) is a dominant allele and hence the allele will be passed onto the Child ruling out the chance of the couple having a phenotypically normal child
How much of the world does the tropical rainforest biome currently cover?
Answer:
13 percent
Explanation:
Describe the difference between aerobic and anaerobic respiration;
including the steps, the amount of ATP produced in each step, and total
amount produced.
Answer:
aerobic respiration uses oxygen and the steps are: 1. glycolysis 2. Krebs cycle 3. oxidative phosphorylation
anaerobic respiration does not use oxygen and the steps are: 1. glycolysis 2. alcohol fermentation
Explanation:
I do not know the other 2
Which of the following characteristics only pertains to chloroplasts?
Answer:
Chloroplasts are a type of plastid—a round, oval, or disk-shaped body that is involved in the synthesis and storage of foodstuffs. Chloroplasts are distinguished from other types of plastids by their green colour, which results from the presence of two pigments, chlorophyll a and chlorophyll b.
Explanation:
I hope this helps and pls mark me brainliest :)
When energy is changed from one form to another with very little loss, the process is said to be
A) efficient
B) advantageous
C) transformed
Or d) excellent
Answer:
A
Explanation:
Efficiently
1. Why is California at hingher for earthquakes than North Dakota
Answer:
because California is located on the San Andreas Fault
Explanation:
California is one of the states that have higher seismic activity because it lies on an individual fault known as the San Andreas Fault. Faults are regions where two tectonic plates are moving with respect to one another, thereby they are prone to suffer earthquakes. The San Andreas Fault is a continental fault that extends approximately 800 miles (1,200 kilometers) through the US state. Conversely, earthquakes in North Dakota are uncommon because this state is located in the middle of a tectonic plate. The last earthquake in North Dakota had a magnitude of 3.3 (Richter Scale) and it happened almost 10 years ago (2012), in Williston.
1. Which statement best describes conservation?
A. use of natural resources
B. maintaining the life of ecosystem
C. wise use and preservation of resources
D. utilizing of earth's resources
2. Which human activity contributes to the destruction of forest?
A. reforestation
B. deforestation
C. protecting the forest against harmful activities
D. all of the above3. The following are ways to conserve Earth's resources, which one is NOT?
A proper waste disposal
B. reduce air and water pollution
C buy products made from animals
D. help raise funds for environmental conservation
4. Which of the following destroys coral reefs?
A building man-made fish sanctuaries
B. dynamite fishing
C waste dumping
D. both B and C
5. Ecosystem is an environment where both living and non-living
things exist and
with one another
A disagree
B. interact
C. compete
D. disconnected
1. Which statement best describes conservation?
C. wise use and preservation of resources
2. Which human activity contributes to the destruction of forest?
B. deforestation
3. The following are ways to conserve Earth's resources, which one is NOT?
C. buy products made from animals
4. Which of the following destroys coral reefs?
D. both B and C
5. Ecosystem is an environment where both living and non-living things exist and with one another
B. interact
Conservation is the careful protection and preservation of the environment. Option C is correct.
The activity of man that leads to the deforestation of the forest lands is deforestation. Hence the option B is correct. The conservation of the earth's resources depends on many factors but it does not on buying products made from animals. Hence the option C is correct. The factors that destroy the coral reefs are B and C that are waste dumping and dynamite fishing. The ecological unit of the ecosystem includes the biotic and abiotic forms in order to interact with each other. Hence the option B is correct.Learn more about the best describes conservation.
brainly.com/question/1619465.
Hi, please help me (it’s science)
The diagram models a hypothesis situation in which every location on earth would have 12 hour of daylight and 12 hours of darkness per day is earth orbit is perfect circle. Hence option B is correct.
What is hypothesis?Hypothesis is defined as a concept or assumption put forth for the sake of discussion and examined to see if it might be true. A hypothesis is seen as a wise guess or prediction that points the researcher in the right path as they attempt to respond to the research topic.
Earth rotates on its axis, or turns, once every 24 hours, carrying us all along with it. When we are on the side of the Earth that faces the Sun, we experience daylight. We are now on the side of the Earth that faces away from the Sun, and night has fallen.
Thus, the diagram models a hypothesis situation in which every location on earth would have 12 hour of daylight and 12 hours of darkness per day is earth orbit is perfect circle. Hence option B is correct.
To learn more about hypothesis, refer to the link below:
https://brainly.com/question/13025783
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Costa Rica, located in Central America, features a very high level of biodiversity due to its tropical climate and large range of habitats. As a result, Costa Rica has endless examples of population interactions lurking in its rain forests. Read about three of these interactions, and then complete the sentences that follow. SlothTickCoral snake Brown-throated sloths (Bradypus variegatus) are tree-dwelling mammals and one of the least active animals on earth. Sloths spend most of their time sleeping or eating young leaves from the trees they live in. The interaction between the sloths and the leaves they eat is an example of a relationship. In this example, sloths are that acquire their nutrients and energy from the they eat. The colors of coral snakes provide these animals with to avoid predation. Specifically, their coloration helps them . The interaction between the hosts and the ticks that live on them can be characterized as , because .
Answer:
The interaction between the sloths and the leaves they eat is an example of a predator-prey relationship. In this example, sloths are herbivores that acquire their nutrients and energy from the plants they eat. The colors of coral snakes provide these animals with mimicry to avoid predation. Specifically, their coloration helps them advertise their toxicity. The interaction between the hosts and the ticks that live on them can be characterized as parasitism, because one species feeds on the other.
Explanation:
Predator-prey relationships are those in which a specie feeds on another specie. The sloth is the predator that feeds on the leaves which are its prey. Herbivores feed on plants. Therefore, the sloth are rightly classified as herbivores.
Coral snakes are brightly colored with red, yellow, and black patches that warn potential predators of their toxicity. Ticks living on hosts are parasitic because the ticks feed on their host.
Match each stem or root to its description.
Fibrous
Herbaceous
Taproot
Woody
A group of beetles live in forest with medium brown tree trunks where these beetles like to hide. Most of the beetles are medium brown, but about 10% are grey. This beetle species is often prey for large birds that live in the forest. A new coal fired power plant opens in the area and the trees become covered with a layer or grey ash. What do you predict will happen to this beetle population
Answer:
it will decrease with cause of power plant
Explanation:
7. True or False. Transitional organisms are not actual species."
Answer:
False.
Explanation:
Transitional forms are species in their own right. They are called transitional forms because they possess traits, like fins, that are found in earlier fossil animals, but also possess traits, like limb bones, that are found in later fossil animals.
hope i helped:)
Scientists believe that there are three jeans what contribute to skin color in humans.
Which of these best describes the inheritance pattern of skin color?
A. Multiple allele in which offspring recessive three allele from each parent.
B. Multiple allele in which offspring recessive three allele from only one parent.
C. Polygenic in which offspring recessive three allele from each parent.
D. Polygenic in which offspring recessive three allele from only one parent.
Answer:
C. Polygenic in which offspring receive three allele from each parent.
Explanation:
In genetics, a polygenic inheritance is an inheritance that involves more than one gene i.e. more than one gene controls a particular trait. This is the case of the skin color trait in humans, which is controlled by three genes.
However, since each gene contains two alleles, each parent will contribute three alleles for the three genes to the development of an offspring i.e. three alleles from the father and three from the mother will result in three genes in the offspring, each containing two alleles.
Answer:D
Explanation:
How organisms get ATP out of the food they eat
3.
A behavioral adaptation when an animal becomes inactive in the winter is _____.
camouflage
migration
sleeping
hibernation
PLS PLS PLS PLS HELP ASAP DUE RIGHT NOW PLSSS
Which arrows show matter moving from a producer to an omnivore? Select all that apply.
A. The arrow between the phytoplankton and the clam
B. The arrow between the rockskipper and the peacock flounder
C. The arrow between the phytoplankton and the rockskipper
D. The arrow between the macroalgae and the triggerfish
E. The arrow between the macroalgae and the damselfish
Answer:
macro one and tiger fish
Explanation:
i think im right because the tiger fish eats both plants and animals
