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Don't miss is (Biology) There may be a lot but I assure you they are easy! (7th Grade)

10 questions with option choices

1. Chromosomes line up in the center of a cell during which phase?

a) anaphase

b) metaphase

c) prophase

d) telophase


2. Which stage of the cell cycle precedes cytokinesis?

a) G1

b) G2

c) interphase

d) mitosis


3. The figure represents which stage of mitosis? (Will be shown in attachment)

a) anaphase

b) metaphase

c) prophase

d) telophase

(Use this question for #4)


4. What forms during this phase?

a) centromere

b) furrow

c) prophase

d) two nuclei


5. What is the longest part of the the cell cycle?

a) anaphase

b) cytokinesis

c) interphase

d) mitosis


6. A plants root system is which level of organization?

a) cell

b) organ

c) organ system

d) tissue


7. Where is the meristem often found?

a) Liver cells

b) Muscle cells

c) tip of plant root

d) unicellular organism


8. Which is NOT a type of human tissue?

a) connective

b) meristem

c) muscle

d) nervous


9. Which are unspecialized cells?

a) blood cells

b) muscle cells

c) nerve cells

d) stem cells


10. Which level of organization completes a series of tasks?

a) cell

b) organ

c) organ system

d) tissue


That's it, thank you!!

Ima go eat, please help me though.

Stem cells are a special kind of cells due to their ability to duplicate and differentiate in different kinds of cells.

there are different kinds of stem cells. The main diference betwen them is the kind of cells they can differentiate into.

for example, when an embrioyo is develoment, the firs cell that is form after the coito is a totipotent stem cell, because it has the ability to diferenciate in every kind of cell in the body. Afer a few weeks, in bovines it would be aroun 8 days, the cells become pluripotent, because they can generate every cell in the body, but the placent. and when we become adults this cells are know as mesechymal (multipotent), that are cells that can diferenciate in certain kind of tissue

Answer:

Here is your answer.. hope it helps u have a great day ahead

Answer:

Case Studies, Checklists, Interviews, Observation sometimes, and Surveys or Questionnaires are all tools used to collect data. It is important to decide the tools for data collection because research is carried out in different ways and for different.

Explanation:

please mark me brainleast

Answer:

Both flowers and runners help a plant to reproduce.

Explanation:

Both flowers and runners help a plant to reproduce. While a flower help in sexual reproduction, a runner helps in asexual reproduction.

A flower has both male and female gamete at one place. When the pollen grains with in a flower reaches the female ovary, a new seed is produced  which has the potential to develop into new plant. In case of runner (which is a stem), the tip of the stem has the potential to grow into a new plant

Answer:

Both flowers and runners help a plant to reproduce

Colony Collapse Disorder (CCD) is a phenomenon characterized by the sudden disappearance of worker bees from beehives, leaving the queen and a few immature bees behind.

The causes of CCD are not fully understood, but prevailing hypotheses include pesticide exposure, parasites and diseases, poor nutrition, and various stress factors. These factors likely interact and contribute to the decline of honeybee populations.

Understanding CCD is crucial for implementing effective strategies to mitigate its impact, including promoting sustainable agricultural practices, reducing pesticide use, improving beekeeping management, and enhancing habitat and forage availability.

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Honeybees provide one of the most important ecosystem services: pollination - and they do this for free! We are experiencing huge losses in pollinator populations throughout the United States and the rest of the world. The decline is so great that many farmers now must import European honeybees to pollinate crops. In 2006, an emerging issue called Colony Collapse Disorder (CCD) caused massive declines in beehives. These declines are still a problem today. Respond to the following prompts in your initial post this week: 1. What is Colony Collapse Disorder and what are the prevailing hypotheses for what causes CCD?

Answer:

The density

Explanation:

The relationship between sickled hemoglobin (HbS) allele frequency and malaria endemicity in Africa can be best explained by the statement: When an area is holoendemic, the HbS allele frequency is between 0.52 and 4.04.

Sickle cell disease is a genetic disorder caused by a mutation in the gene that codes for hemoglobin. The HbS allele is responsible for the production of abnormal hemoglobin, leading to the characteristic sickling of red blood cells. However, individuals who carry one copy of the HbS allele exhibit increased resistance to malaria, a mosquito-borne infectious disease prevalent in Africa.

The map showing the allele frequency of HbS and malaria endemicity in Africa reveals an interesting pattern. In areas where malaria is holoendemic (high prevalence), the HbS allele frequency ranges from 0.52 to 4.04. This indicates that a moderate presence of the HbS allele is associated with a higher prevalence of malaria. It suggests that individuals carrying one copy of the HbS allele have a survival advantage in regions with intense malaria transmission.

Conversely, in areas that are malaria-free, the HbS allele frequency is relatively low, ranging from 0 to 4.04. This suggests that the HbS allele is not favored in regions without the selective pressure of malaria. In malaria-free areas, individuals without the HbS allele do not experience the detrimental effects associated with sickle cell disease, and therefore, the allele frequency remains low.

In summary, the statement "When an area is holoendemic, the HbS allele frequency is between 0.52 and 4.04" best explains the relationship between HbS allele frequency and malaria endemicity in Africa. This suggests that the presence of the HbS allele is positively correlated with the prevalence of malaria, indicating a selective advantage against the disease in holoendemic areas.

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Answer:

50/50

Explanation:

u never know if it will be a girl or a boy because it is natural to either one

HOPE THIS HELPS

Answer:50/50

Explanation:

it doesn't matter how many children you have or what gender they are you will always have a 50% percent chance

Answer:

40

Explanation:

it goes up by four each time

C. Due to lack of ADH receptors in the collecting duct

Diabetes insipidus is characterized by an abnormal urinary constituent related to the lack of antidiuretic hormone (ADH) receptors in the collecting duct. This condition causes the kidneys to be unable to properly concentrate urine, leading to excessive urination and increased thirst. The lack of ADH receptors in the collecting duct is the primary cause of this disorder, differentiating it from other urinary abnormalities like diabetes mellitus, glomerulonephritis, and hemoglobin-related issues.

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Answer:

A) Decreased K’eq - This is not correct. Enzymes lower the activation energy required for a reaction to occur, which leads to an increase in the rate of the reaction (k1) and a decrease in the equilibrium constant (Keq)

B) Increase k1 - This is correct. Enzymes lower the activation energy required for a reaction to occur, leading to an increase in the rate of the reaction (k1).

C) Increase ∆G‡ - This is not correct. Enzymes lower the activation energy required for a reaction to occur, which leads to a decrease in the standard free energy change (∆G‡)

D) More negative ∆G’° - This is not correct. Enzymes lower the activation energy required for a reaction to occur, which leads to a decrease in the standard free energy change (∆G‡) and as a result, ∆G'° will become less negative.

E) Increased k2 - This is not correct. Enzymes do not affect the rate constant for the reverse reaction (k2)

F) Decreased ∆G‡ - This is correct. Enzymes lower the activation energy required for a reaction to occur, which leads to a decrease in the standard free energy change (∆G‡)

G) Increased Keq - This is not correct. Enzymes lower the activation energy required for a reaction to occur, which leads to a decrease in the equilibrium constant (Keq)

In summary, enzymes catalyze reactions by lowering the activation energy required for a reaction to occur, leading to an increase in the rate of the reaction (k1) and a decrease in the standard free energy change (∆G‡) and equilibrium constant (Keq).

The enzyme that is catalysing the straightforward reaction has a lowered activation energy, increased k1, and increased k2.

Enzymes don't alter a biological reaction's equilibrium state, to put it briefly. G0 and Keq do not change. Instead, the enzyme speeds up the reaction by lowering the activation energy required for it to happen.

A catalyst accelerates the forward and backward reactions by the same precise amount. When the rates of the forward and back reactions are identical, dynamic equilibrium is reached. There is no requirement for a change in the position of equilibrium if a catalyst speeds up both reactions equally.

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Answer:

i think its Mesa

The accommodations on the space station would help prevent problems associated with weak muscles, requiring the astronaut to be helped from the spacecraft once back on Earth is B. Outfit the space station with exercise equipment.

The relationship between weak muscles in astronauts and long seasons in space is based on the fact that the attractive forces or gravity in space are lower than on earth, thereby muscles need to exercise in order to avoid the loss of muscle mass.

Therefore, with this data, we can see that the relationship between weak muscles and space are cemented on the observation that gravity considerably decreases outside the earth's atmosphere when compared to space.

Complete question:

An astronaut returns from six months on the space station. The astronaut’s muscles are weak, requiring the astronaut to be helped from the spacecraft once back on Earth. Which of the following accommodations on the space station would help prevent this problem?

Provide food that provides astronauts with more energy. 

Outfit the space station with exercise equipment. 

Increase the oxygen levels inside the space station. 

Design spacesuits that are lighter and easier to wear.

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Answer

One is a move and the other is a part of a state.

Explanation:

Answer:

The only difference, he explained, was that in the big bang scenario all the matter was created in one explosive beginning.

Organisms can adapt to different environments, however, this usually occurs over generations and at the population level. At the level of the individual, an example is mutations, in which the offspring may have different characteristics from the progeny. However, these adaptations of the offspring will either be detrimental or give an advantage depending on the environment in which it is

Because these changes occur gradually over generations, individual organisms cannot increase their fitness on their own. And although there are special cases in which an organism can adapt to environmental changes through a phenomenon called phenotypic plasticity, this is not common in all species and is not due to a genetic change in the individual. Therefore, the answer would be B (sometimes, it depends on where they are located if the adaptation is helpful or not).

In Griffith’s experiments, DNA made the harmless r cells grow capsules when exposed to heat-killed s cells.

An experiment is a study which is done to provide an answer to a research question or an observation.

Experiments are done to prove or disprove hypothesis about an observation.

In Griffith’s experiments, harmless r cells grew capsules when exposed to heat-killed s cells. This was because of the DNA which were responsible for production of the protein capsules.

In conclusion, DNA are used to synthesize proteins.

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The mRNA sequence for the given amino acid sequence "start-lys-asn-gly-phe-his-thr-arg-pro-gln-stop" is:

AUG AAA AAU GGU UUU CAU ACA CGG CCA CAG UAG

Amino acid sequences play a crucial role in the structure and function of proteins. Proteins are composed of long chains of amino acids, which are linked together by peptide bonds. The sequence of amino acids in a protein determines its unique three-dimensional structure, which in turn determines its function.

In mRNA, the start codon is AUG, which codes for methionine (Met) in the amino acid sequence. The stop codon is UAG, which does not code for any amino acid and signals the end of protein synthesis.

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Axonal transport is a crucial process in neurons that involves the movement of proteins within the axon. It is a bidirectional process, encompassing both retrograde and anterograde transport.

Axonal transport plays a vital role in maintaining the functionality and integrity of neurons. It allows for the transportation of essential proteins, including synaptic knob enzymes and proteins that help maintain the axolemma, throughout the entire length of the axon. This ensures proper communication between neurons and enables the axon to respond to various signals and stimuli.

The transport process is bidirectional, meaning that it occurs in both directions along the axon. Anterograde transport refers to the movement of proteins from the cell body towards the synaptic terminals, while retrograde transport involves the transport of molecules from the terminals back to the cell body. This bidirectional nature allows for the delivery of newly synthesized proteins to the appropriate locations within the axon and facilitates the removal of damaged or unnecessary proteins.

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Congenital periodic alternating nystagmus (PAN) is a type of involuntary eye movement that is present from birth and characterized by rhythmic oscillations of the eyes that alternate between left and right, often with a regular pattern.

It is thought to be caused by a disruption in the normal development of the part of the brain that controls eye movement. PAN can result in impaired vision and difficulty with activities such as reading and driving. Treatment may include visual aids or medications to alleviate symptoms.

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Answer:

Carbon dioxide and energy from the Sun is converted into sugar molecules(glucose)  and oxygen; ATP molecule

Explanation:

The best explanation for why extinctions are more likely with longer growing seasons in the simulation of Isle Royale is that larger populations of moose and wolves become more vulnerable to environmental fluctuations, increasing the chance of extinction.

In the simulation of Isle Royale, a longer growing season leads to more plants being available, which results in healthier moose populations on average. When moose are healthier, they can avoid wolves more effectively, leading to the extinction of the wolf population. However, this is not the primary explanation for the increased likelihood of extinction.

The main reason for the higher likelihood of extinctions with longer growing seasons is that larger populations of moose and wolves become more vulnerable to environmental fluctuations. During peak cycles, both moose and wolf populations grow larger. However, with a sufficient number of wolves, they are able to consume all available moose, which eventually leads to the extinction of both species. This cyclic relationship between moose and wolves, known as predator-prey dynamics, is influenced by the availability of food resources.

When the growing season is longer and more plants are available, it can support larger populations of moose. As a result, the moose population exceeds the carrying capacity of the island, and the competition for limited resources intensifies. This heightened competition, coupled with the cyclic nature of predator-prey dynamics, increases the chances of extinction for both moose and wolves.

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Answer:

c

Explanation:

for the genetic code is contained in the nucleus.

but this dose not apply to cells without a nucleus e.g. red blood cells...

If a person wanted to learn more about the genetic material of plant and animal cells, where would they look? A) on the cell wall / B)inside the chloroplasts / C) in the nucleus / D) in the lysosomes

Answer: (C in the nucleus)

btw K12 answer i got it right

A nurse providing care to a woman in labor should be aware that a cesarean birth is performed primarily for the benefit of the fetus.

The most likely statement to be associated with a breech presentation is "The fetal head is delivered last".Explanation:A cesarean birth is performed primarily for the benefit of the fetus due to many reasons such as a prolonged labor, a prolapsed umbilical cord, a cephalopelvic disproportion, placenta previa, and many other reasons. A cesarean birth is performed when there is a need for the baby to be delivered quickly.

The baby may be in distress and needs to be delivered immediately. A breech presentation refers to a baby who is not positioned head down in the mother's uterus. The baby's position during labor and delivery is a critical factor in whether or not a normal vaginal delivery is feasible. In a breech presentation, the fetal head is delivered last since the baby is not positioned head-down in the uterus.

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The ball looks black because it is absorbing all the visible light that is hitting it and reflecting none of it back.

Black ball is a term used in various sports, games, and competitive activities to describe a situation where a player or team has been excluded or disqualified from further participation. All objects absorb some wavelengths of light and reflect others, and the combination of reflected wavelengths is what gives the object its color. In the case of a black ball, it is absorbing all the visible wavelengths and therefore reflecting none, giving it the appearance of being black.This is because black objects are good absorbers and poor reflectors of light. As a result, the black ball appears black when viewed by the eye.

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Answer:

a) an ecosystem

Explanation:

The corals that construct reefs and the fish that live there have significant symbiotic relationships. Fishes depend on corals for food and habitat, while corals rely on fish grazing for reproductive success.

What is the relation between fish and coral?

Grouper, snapper, and lobster are just a few of the commercially significant fish species that rely on coral reefs for both food and refuge.

For billions of people worldwide, the fish that live and thrive on coral reefs provide a vital source of food.

Both in marine reserves and in places where fishing is permitted, a severe reduction in coral cover resulted in a simultaneous decline in fish biodiversity.

The abundance of more than 75% of reef fish species decreased, and 50% of them decreased to less than half of their previous levels.

Therefore, fish and coral represent a symbiotic relationship in an ecosystem.

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