Answer:
C. The amount of organisms
Explanation:
Producers produce food from inorganic matter, this then makes food for other organisms in an ecosystem. The amount of producers dictates how much food is available, and by that how many organisms can be present.
Read each of the sentences that describe a phase of meiosis. Place each sentence into the correct box.
Homologous chromosomes pair to form a tetrad.
Crossing-over may occur between the non-sister chromatids.
Homologous chromosomes line up at the center of the cell.
Homologous pairs separate and move towards opposite ends of the cell.
A nuclear membrane forms and cytokinesis follows.
The haploid number of duplicated chromosomes line up at the metaphase plate.
Sister chromatids separate and become daughter chromosomes that move to the poles.
Four haploid daughter cells are formed that are not genetically identical.
Prophase 1
Metaphase
Anaphase and Telophase !
Meiosis 11
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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One of the primary advantages of cell culture is the ability to isolate a single type of cell from a multicellular organism. How has this advance changed the study of biology?
Single-type cultures are easier and cheaper to maintain than cultures made of mixed cell types.
Scientists can completely avoid using animal or human test subjects during their experiments.
Cultures with single cell types behave in culture exactly as they would behave in a tissue or organ.
Scientists know that any response during an experiment is associated only with that cell type.
Answer:
Scientists know that any response during an experiment is associated only with that cell type.
Explanation:
A cell culture is a group of cells that develops from a single original cell. Biologists can use cell cultures to test cell responses under controlled environmental conditions in order to study interactions between cells, and different processes occurs in it. Cell culture is one of the major tools used in the study of physiology and effect of toxic substances on the cells.
Answer: The answer is D.
Explanation:
What is the main source of raw material for the production of plastics?
Answer:
Crude oil is the main source
Explanation:
hope it helps
Pls mark as brainlist
Why do we have to secure the inflated balloon
Answer:
cuz it will blow up xd need more secure
Answer:
it might fly away
Explanation:
Shura listed the steps for protein production in cells.
1. A strand of RNA is made.
2. RNA leaves the nucleus.
3. RNA moves to the ribosome.
4. A protein is made.
Which step is missing?
A. DNA unzips after step 1.
B. DNA unzips before step 1.
C. DNA is replicated after step 3.
D. DNA is replicated before step 3.
Answer:
B. DNA unzips before step 1.
Explanation:
This question is describing the process of gene expression, which is made up of two major stages namely; transcription and translation. Transcription is the process by which mRNA is synthesized from a DNA template while translation is the process where protein (amino acid sequence) is produced using the mRNA transcript.
This stages of gene expression has been summarized in the steps listed by Shura. However, prior to the formation of an mRNA molecule in step 1, the double stranded DNA has to unwind i.e. separate into single strands as initiated by the enzyme RNA polymerase. Therefore, the list should read as follows:
- DNA unzips
- A strand of RNA is made.
- RNA leaves the nucleus.
- RNA moves to the ribosome.
- A protein is made.
When you compare the percent similarity between nucleotide sequences for GAPDH with the percent similarity between protein sequences for GAPDH, what outcome would you predict?
a. Percent similarity of nucleotides will be identical to percent similarity of protein.
b. Percent similarity of nucleotides will be less than percent similarity of protein.
c. Percent similarity of nucleotides will be greater than percent similarity of protein.
Answer:
a. Percent similarity of nucleotides will be identical to percent similarity of protein.
Explanation:
In accordance to the central dogma of biology, PROTEINS are formed from the instructions contained in the nucleotide sequences of GENES. In other words, genes contain nucleotide sequences that holds information needed to produce proteins. This means that every protein is encoded by the nucleotides of a gene.
According to this question, nucleotide sequences of GAPDH will undergo gene expression to form protein sequences of GAPDH. Since GAPDH nucleotide sequences form GAPDH protein sequences, the percent similarity of nucleotides will be identical to percent similarity of protein.
Guess why most leaves are wide and thin.
Answer:
Due to their broad surface areas, green leaves can absorb more sunlight at a given time, and due to the thinness of the leaves, the light energy can easily penetrate the leaf surface and be trapped by the chloroplasts. This makes photosynthesis efficient. Therefore, green leaves are thin and broad.
Explanation:
Hope this helps you......
please do this. It is 100 points and im giving brainliest.
Answer:
pls see on book all answer see given
Which of the following are filled with synovial fluid?
a) articulated cartilage
b) menisci
c) bursar
d) ligaments
You were with your younger cousin playing at the park and he has mixed up his legos in the sand.
Explain how you could separate this mixture.
Answer:
You can use a tea net to separate the Legos and the sand. When you scoop up the sand into the net, the sand will be sifted away because it is smaller than the holes in the tea net. But, the LEGOs are much bigger, so they will remain inside the net.
Draw me a diagram of an iron molecule and a water molecule
Explanation:
cause it will be like this
Which of the following is true about temperate forests?
They receive little rain throughout the year.
The temperate forest experiences seasonal changes.
The temperate deciduous forest has cold summers and warm winters.
They are barren and have few trees.
Answer:
Temperate forests typically have winters that often reach below freezing, however even this is not always true. The East Coast forests retain their deciduous nature largely due to the excessive freezing days each winter, as the leaves often freeze over and are only designed to live for one season.
The true statement about temperate forests is : The temperate forest experiences seasonal changes ( B )
The temperate forest regions experiences a high level of rainfall and humidity, it is characterized with a variety of trees ( deciduous ) whom shed their leaves during winter due to the decrease in rainfall and sunlight during winter season.
The shedding of leaves during the winter and the blossom of trees during summer shows that the forest experiences seasonal changes .
Hence we can conclude that the true statement about temperate forest is that the forest experiences seasonal changes.
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You arrive at the scene of an accident where people are panicked and yelling. Three people appear to be injured. What action will you take FIRST?
Answer:
Go over to the panicked people and ask what happened.
Explanation:
I hope this helps you!
E
Since the 1960s, the Medicare and Medicaid programs have successfully
reduced discrimination against minorities in renting and housing.
increased the number of college graduates among all groups.
reduced the amount of military spending in the national budget.
O increased the number of people who have health insurance.
Answer:
The correct answer is - increased the number of people who have health insurance.
Explanation:
Medicare and Medicaid are the federal health insurance programs introduced during the early 60s to cover all the expenses on the health issues of people over 60 or above. It is controlled by the federal agency.
It is increased in great number since the 1960s which helps elderly people of the US to cover all the expenses they spend on their health issues and diseases.
Since the 1960s, Medicare and Medicaid programs have increased the number of people who have health insurance.
How does Medicare work?Established in 1966, Medicare is funded by Social Security and provides care for people over 65 who have contributed health tax payments during their working years. It also provides coverage for people with disabilities or conditions that prevent them from working.
From this information, we can conclude that since the 1960s, Medicare and Medicaid programs have increased the number of people who have health insurance.
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HELP PLS
Below is the 5' to 3' original strand of DNA. Please use the DNA from Sample #1 to
answer the questions below.
Sample #1
5'CAGGCT 3'
Create the 3' to 5' complementary DNA strand for sample #1 using the correct
base pairing rules.
Your answer
Transcribe the mRNA strand from the 3'to 5' complementary DNA strand. 1 point
Your answer
Formaldehyde is an organic compound. Each molecule includes two hydrogen (H) atoms, one oxygen (O) atom, and one carbon (C) atom. Below are the dot structures for each of these elements.
At left, a purple circle labeled H surrounded by two concentric circles, the inner with nothing on it, the outer with 1 small green spheres. In center, a purple circle labeled O surrounded by two concentric circles, the inner with 2 small green spheres, the outer with 6 small green spheres. At right, a purple circle labeled C surrounded by two concentric circles, the inner with 2 small green spheres, the outer with 4 small green spheres.
Which diagram shows how the covalent bonds most likely form in a formaldehyde molecule?
C connected above and below to H's by 1 line each. C also connected by two lines to O, which has 2 dots each above and below.
C connected above and below to H's by 1 line each. C also connected by three lines to O, which has 2 dots each above and below.
O connected above and below to H's by 1 line each. O also connected by two lines to C, which has 2 dots above.
O connected above and below to H's by 1 line each. O also connected by two lines to C, which has 2 dots each above and below.
Answer- H
| ..
C = O
| ..
H
Explanation: Correct on Edg 2020/2021.
Answer:
A.
Explanation:
se the information from the article to answer the question.
NEOs
When scientists discuss objects that might hit Earth, what term do they use to describe them as a group?
near-Earth objects
asteroids and comets
Shoemaker-Levy 9
celestial bodies
Answer:
A. near-Earth objects.
Explanation:
Science can be defined as a branch of intellectual and practical study which systematically observe a body of fact in relation to the structure and behavior of non-living and living organisms (animals, plants and humans) in the natural world through experiments.
When scientists discuss objects that might hit Earth, the term which they use to describe them as a group is near-Earth objects.
A near-Earth objects can be defined as a small solar system body such as comets and asteroids whose orbit draws it close or in proximity to the earth's orbit due to the gravitational force of attraction of nearby planetary bodies.
Basically, if the closest approach of a planetary body to the Sun is less than 1.3 AU it is considered to be a near-Earth objects.
Hence, near-Earth objects may pose a collision danger to planet earth.
Answer: A Near Earth objects
Explanation:
Use the information from the article to answer the question.
NEOs
When scientists discuss objects that might hit Earth, what term do they use to describe them as a group?
near-Earth objects
asteroids and comets
Shoemaker-Levy 9
celestial bodies
Many of us have been impacted by outbreaks of disease in our lifetimes. Throughout history, humans have battled outbreaks of disease; many have lost their lives to diseases before treatments and cures were discovered. Modern science and medicine have become efficient in developing vaccines and medications to control and treat outbreaks, but whether the diseases will ever truly be eradicated is in question. Considering how many of these infectious diseases exist and how easily they spread, it is important to remember safety issues to reduce and prevent transmission.
reflect over the past decade and recall a news-breaking infectious outbreak of a disease that made an impact on you. Please include a link to a news article or video related to your outbreak in your initial post. Include the following in your post:
Disease name
Infectious agent (is the disease bacterial, viral, or fungal? List the specific organism (genus species)
Mode of transmission
Signs and symptoms of the disease
Treatment (or treatments) available
Try not to duplicate another classmate’s topic (make your subject line is your disease so it is easy to check)
Explain how that story changed the way you interacted with people, family, or friends.
Answer:
ok
Explanation:
people make clothing using fibers that come from natural materials and from synthetic materials. How do these materials differ from one another?
how does shell color work to protect the egg from sunlight?
Answer:
Birds that live in cool climates lay darker eggs, as darker colors absorb more heat from the sunlight
Birds that live in hotter climates lay lighter eggs to prevent the egg from overheating.
The pigmentation acts to thermo-regulate the internal temperature of the egg, acting as a buffer between the embryo and the outside world. It does this by preventing overheating of the egg, through reflecting the sunlight off the pigmentation, rather than allowing it to be absorbed through the shell
3. Which organisms are consumers? (Select all that apply.)
coyote
snail
green algae
bacteria
coyote
snail
green algae
Plzzzzzzzzzzzzzzzzzzzzz
Answer: its diamond
Explanation:
The cross Lpq/lPQ x lpq/lpq is carried out and the L gene is found to be in the middle. what would be the geneotype of the double crossover gametes in this cross?
Answer:
PLQ (Double Recombinant gamete) plq (Double Recombinant gamete)Explanation:
Cross:
Parentals) pLq/PlQ x plq/plq
Gametes) pLq (Parental) plq (Parental)
PlQ (Parental)
pLQ (Recomb)
plQ (Recomb)
PLq (Recomb)
Plq (Recomb)
PLQ (Double Recom)
plq (Double Recom)
Parentals)
p----L-----qP.....l........QSimple recombinant)
Recombination occurs between p and L, OR between l and q.
P----L-----qp......l.....Qp----L-----QP.....l........qDouble recombinant)
Recombination occurs between p and L, AND between l and q.
p-----l------qP......L.......QPLZ QUICK!! WILL MARK BRAINLIEST!!
Which statement is accurate?
A) A gene consists of two traits.
B) An allele is one form of a gene.
C) Most alleles have many genes.
D) An allele is made up of two genes.
Answer:
the answer to this question would be D) An allele is made up of two genes.
Isabel is 16 years old and preparing to take a final exam. Her good friend has a list of the possible essay questions that were taken from the teacher's desk and asks Isabel if she would like to look at it. Isabel chooses not to look at the essay questions. According to Kohlberg, why might Isabel have made this decision? Be sure to describe the stages of Kohlberg's theory of moral development in your response.
Answer:
According to Kohlberg, Isabel might have made this decision in order to maintain social order.
Explanation:
There are six stages in Kohlberg's theory of moral development. They include;
Stage 1 Pre-conventional (Common among children under the age of 9)
Obedience and punishment orientation Self-interest orientationStage 2 Conventional (Common among pre-teens, teens, and some adults)
Interpersonal accord and conformity Authority and social-order maintaining orientation:This is the stage Isabel is in. Isabel recognizes that the law is against cheating and she reasons on how her own personal actions would negatively affect the society. Therefore, she choses to play her own role by desisting from cheating even if her friend is doing it.
Stage 3 Post-Conventional (rarely displayed by some adolescents and adults)
Social contract orientation Universal ethical principlesThe type of RNA that delivers amino acids to the ribosome during protein synthesis is tRNA.a) trueb) false
Answer:
A). True
Explanation:
tRNA, which means transfer RNA is one of the three types of RNA known in nature. The tRNA is found in the ribosome, where it plays a pivotal role in protein synthesis (translation). Transfer RNA is the RNA responsible for reading the nucleotides in the mRNA codon and carrying the amino acid that corresponds those codons to the ribosome.
The tRNA has a 3-dimensional structure that allows it to carry anticodon that reads codon and also carry amino acids on opposite ends. Hence, according to this question, tRNA is a type of RNA that delivers amino acids to the ribosome during protein synthesis.
If a person has a type A blood type, which antibodies would they have to have?
Answer:
B antibodies
Explanation:
The WBCs in the blood of that person would have A markers to identify the A antigens on the RBCs. So they would produce defense cells with B antibodies
You tell a story to a second person who tells it to a third person, and so on. As the story is retold, changes are introduced. Over time, the number of changes increases. How is this process an analogy for what happens to DNA over time? (Just 2-3 sentences)
40 points to whoever responds first
Answer:
Use Analogies You tell a story to a second person who tells it to a third person, and so on. As the story is retold, changes are introduced. Over time, the number of changes increases.
The story changes over time because of the way the teller and the listener communicating. The DNA of a newborn baby is a combination of their mom and dad. Every time the DNA changes it's because there is a new combination of two people.
The grouping of rocks as igneous, sedimentary, and metamorphic is based primarily upon
differences in what
Answer:
The correct answer is - texture and composition.
Explanation:
The classification of the three types of rocks as igneous, sedimentary, and metamorphic rocks is primarily based upon the components and the texture. The sizes and shapes of grains of the mineral and other components and how they interact are present are known as texture.
Igneous rocks - melted rock deep inside the Earth.
Sedimentary rocks - layers of sand, silt, dead plants, and decomposed organism and their skeletons.
Metamorphic rocks - changed by heat and pressure underground
In a histology section of the digestive tract, you observe that the mucosa is made of simple columnar epithelium and the tissue has three layers of smooth muscles. This section represents ________. In a histology section of the digestive tract, you observe that the mucosa is made of simple columnar epithelium and the tissue has three layers of smooth muscles. This section represents ________. duodenum large intestine stomach esophagus
Answer:
The correct answer is - stomach.
Explanation:
The stomach is the only part of the digestive tract among the duodenum, large intestine, stomach, and esophagus that has three layers of smooth muscle.
The duodenum, large intestine, and esophagus simple columnar epithelium, and others have two -layers of smooth muscles and have simple columnar epithelium. This suggests that the mucosa is the section of the stomach in the digestive tract
