For men, the period of physical and psychological change in the reproductive system is referred to as.
Spindle fibers
a. direct chromosome movement in cell division
b.are composed of thin protein filaments
c. are made by the centrioles
d. all of the choices are correct
Spindle fibers .are composed of thin protein filament. Thus, the correct option is B. The spindle is made up of microtubules, which are strong fibers that make up the cell's "skeleton." Its duty during mitosis is to arrange and move the chromosomes around. As the centrosomes separate, the spindle grows between them.
When the spindle starts to form?The mitotic spindle begins to collect and organize the chromosomes in late prophase (also known as prometaphase).
The cell will check to see if all of the chromosomes are at the metaphase plate, with their kinetochores appropriately connected to microtubules, before going to anaphase. This is known as the spindle checkpoint, and it ensures that when the sister chromatids separate in the next stage, they will split evenly across the two daughter cells. When a chromosome is misaligned or connected, the cell will stop dividing until the issue is resolved.
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Which factor is found in a scientific claim?
endorsement by famous scientists
data collection from only one facility
similar results in multiple tests of the claim
identical data across all tests of the claim
similar results in multiple tests of the claim is the correct option. thus option C is correct.
What do you mean by scientific claim?Scientific assertions are statements made in science based on an experiment. They're assertions just like you might see in other classes, but they are backed by experimental data you created, as well as the work of other scientists.
A scientific claim includes of similar outcomes in various tests of the claim.
Scientific procedures include observation, running experiments, inference etc.
A scientific claim is however deemed to be genuine when the outcomes of the experiment are replicable several times in any area of the world. The results are frequently shared with others to ensure that the many tests are run by different scientists to check its veracity.
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What is biodiversity?
a college for studying biology
all different types of organisms
all different types of sciences
a language used by biologists
Answer:
2.all different types of organisms
Answer:
B
Explanation:
The first living things to grow successfully on a newly formed sand dune are known as.
Pioneer organisms are the first living things to grow successfully on a newly formed sand dune.
What do you mean by primary succession?Plants and animals first inhabit a barren, lifeless area in primary succession, a type of ecological succession (the evolution of a biological community's ecological structure).
Pioneer species are the first species to arrive in a newly constructed environment, and through their interactions, they form a basic biological community. As additional species enter, the community becomes more complicated.
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Which organism should be the least common in an ecosystem
Answer:
If you had to guess the most abundant organism on the whole planet, you'd probably think of ants or, maybe, bacteria. But a newly discovered virus might trump them all. Pelagibacter ubique is often cited as the most common organism ever: it's a third of all the single-celled organisms in the ocean.
Explanation:
thangks
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Sarah and Alex have been dealing with an infestation of Chinch bugs on their farm for the past 5 years. They have called a pest control company to spray an insecticide, ChinchBeGone, over 20 times on their land. For the first year, the insect population decreased significantly but after some time, the insect population remained constant even after treatment.
Using the words below, name and describe the process that led to the Chinch bugs surviving the insecticide treatment.
- Genetic variation
- Mutation
- Selection
- Allele frequency
Answer:
I will say genetic variation because they probably never fully got rid of them(and all of their eggs) to begin with
Explanation:
exchange of useful chemicals between organisms and their abiotic environment is an example of what
The exchange of useful chemicals between organisms and their abiotic environment is an example of matter cycling.
What is the matter cycling?Matter cycling refers to the cyclic movement of matter between biotic factors and abiotic factors.
This process (matter cycling) is fundamental for the survival of organisms and health of an ecosystem.
In conclusion, the exchange of useful chemicals between organisms and their abiotic environment is an example of matter cycling.
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Please faster i need the answer now
Answer:
REACTANTS CARBON DIOXIDE+ OXYGEN
PRODUCTS:Glucose+Lactic Acid+Energy
6th grade student measured his heart rate at 94 beats per minute every minute every morning at the same time for two
Weeks. In his report he claimed he proved that 6th grader's hearts beat 94 times per minute. What is wrong with his
Report?
A. Human hearts do not beat that rapidly.
B He should have taken his heart rate many times over two weeks.
C. 6th graders hearts do not beat that slowly.
D.The student's sample size is too small to prove his claim.
Answer:
its A
Explanation:
Its impossible for a human to have a heart beat of 94 each minute
The statement that represents a wrong concept in his report is as follows:
Human hearts do not beat that rapidly.Thus, the correct option for this question is A.
What is Heart rate?Heart rate may be defined as a mechanism that significantly involves the number of times the heart beats within a certain time period generally in a minute. In a more simple sense, it may be characterized as the number of contractions of the heart per minute.
According to the context of this question, the normal rate of humans usually ranges from 60 to 100 beats per minute. But being a student of 6th standard, it is too higher because it is ranging from 60 to 80 per minute for that group of children specifically with respect to the capability of their cardiovascular stength.
Therefore, the correct option for this question is A.
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Which of the following is not associated with humoral immunity?
A cytotoxic T cells
B breast milk
C these are all correct
D antibodies
E B cells
Answer:
The answer is C
Explanation:
The __________ causes the stage to move upward or downward.
What is spermatogenesis and sporophyte?
Answer:
Explanation:
1. Production of sperm by meiosis
2. diploid generation which alternates with haploid (in plants)
Davy made a model of the water cycle by adding some water inside a plastic bag, sealing the bag, and placing it in a sunny area. he noticed that the level of the water went down, and then some droplets appeared on the sides of the bag. which part of the water cycle caused water droplets to form on the side of the plastic bag? condensation evaporation precipitation runoff
Davy made a model of the water cycle by adding some water inside a plastic bag, sealing the bag, and placing it in a sunny area. He noticed that the level of the water went down, and then some droplets appeared on the sides of the bag. which part of the water cycle caused water droplets to form on the side of the plastic bag?
(a) condensation (b) evaporation (c) precipitation runoff
The part of the water cycle that caused water droplets to form on the side of the plastic bag would be condensation.
What is condensation?It is a process whereby water vapor in the atmosphere condenses or turns back into liquid.
Condensation is as opposed to evaporation. The latter is a process whereby liquid water turns into vapor water. In other words, evaporation and condensation are words and opposites.
Both processes play a major role in the water cycle of the ecosystem.
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3. Cells divide, differentiate, or die. What is differentiation?
Answer:
Differentiation is when cells stop dividing to develop specialized structures such as a neuron developing an axon.
Explanation:
Its basically when cells stop dividing to specialize in structure and function.
How does water cycles involve biotic and abiotic factors?
Answer:
This recycling process involves both the living organisms (biotic components) and nonliving things (abiotic factors) in the ecosystem. Through biogeochemical cycles, water and other chemical elements are constantly being passed through living organisms to non-living matter and back again, over and over.
Explanation:
How does the sea ice in 2019 compare to the sea ice in 2012 during April?
The amount of sea ice in 2019 is considerably less than it was in 2012
The amount of sea ice in 2019 is considerably more than it was in 2012
The amount of sea ice in 2012 and 2019 were very similar
The total amount of sea ice showed a decline
The total amount of sea ice showed a decline from 2012 to 2019. The correct option would be D.
Graphical illustrationLooking at the graph, from February to June 2012, there is a decline in the amount of sea ice.
A similar decline in the amount of sea ice can be observed in the year 2019.
However, the sea ice levels for the various months in 2012 remain generally above the sea ice levels in the various months in 2019.
Thus, overall, one can say there is a general decline in the ice level from 2012 to 2019.
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If the process involved in cellular transport are not functioning properly, how is cellular homeostasis affected? In general terms, if the cell of an entire organ are not carrying out cellular transport properly, what is the result?
Answer:
Cell membranes enable organisms to maintain homeostasis by regulating the materials that may enter or leave a cell. Some materials easily cross the cell membrane without the input of energy; other materials require energy input in order to cross through the cell membrane.
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Improve the student's model of gas exchange by drawing the missing component.
Answer:
capillary
Explanation:
you should draw a capillary to show where gas exchange is occuring
How will building a road through the rainforest affect the plants and animals
Answer:
it will kill paints remove animal homes take more area that was for animals so they will fight over territory even more
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Question 16 (1 point)
(07.06 MC)
Which of the following best describes an example of a specific immune response to infectious agents? (1 point)
O a
Antibodies bind to antigens on the infectious agents, which are then destroyed by lymphocytes.
Ob
Phagocytes surround the infectious agents, and then engulf and destroy them.
The infectious agents cause the body to release histamine, which causes inflammation and swelling.
Sweat creates an acidic environment, which prevents reproduction of the infectious agents.
Answer:
antibodies bind to antigens on the infectious agent which are then destroyed by lymphocytes
The diagram shows the first part of a kidney tubule and its blood supply. During filtration, protein molecules do not pass through the wall of the glomerulus. Which part contains the highest concentration of protein? A
B
C
D
During filtration, the highest concentration of protein are generally found in the glomerulus capillary, which is labeled as B.
What is a kidney?A kidney refers to a pair of bean-shaped organ within the body of an organism which is typically responsible for the excretion of excess fluids as wastes. Also, the kidney is an organ that helps to filter blood and produce urine in vertebrates.
During filtration, the highest concentration of protein are generally found in the glomerulus capillary, which is labeled as B in the diagram shown in the image attached below.
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The cumulative work of many scientists can often be summarized as theories or laws. how is a theory different from a law
Answer:
A law is something in science that can be proved through experimenting. When the experiment is done properly, the same outcome will be achieved every time. A law does not attempt to explain why something is the way it is, it only states it.
A theory is an idea that has a large amount of scientific data backing it and is the accepted answer by most scientists, but there is no way to experiment on a scientific theory. A theory will never be able to become a law. A theory explains what it is describing.
1. Warm Up: How do scientists estimate how old fossils are (and thus, estimate
how long ago certain creatures were alive, and how long the earth has existed)?
Explain what you already know about this topic.
Help me
Answer:
Radiocarbon dating
Explanation:
Radiocarbon dating is a technique for determining the age of carbon-based materials derived from live beings. By measuring the quantity of carbon-14 in a sample and comparing it to an internationally accepted reference standard, an age may be determined. Radiocarbon dating is based on the basic principle that all living organisms absorb carbon from the atmosphere and food sources around them, including a small quantity of naturally radioactive carbon-14. When a plant or animal dies, it stops absorbing carbon, but the radioactive carbon it has stored decays.
Eye color is controlled by one gene. There are two alleles for this gene:
Brown (B) and blue (b). The brown allele is dominant and blue allele is
recessive, however the brown allele is incompletely dominant over the
blue. A heterozygous individual has green eyes. What offspring could be
produced if two green eyed individuals mate?
Answer:
There are 16 possible genotypes and phenotypes that are listed in the punnett square. The ratio of phenotype is -
Brown : green : blue :: 12:3:1
Explanation:
plato
A frog has more offspring than can survive on available resources.
Which is this an example?
Describe the effects of malnutrition on humans.
Answer:
Malnutrition can result in unplanned weight loss, a low body mass index (BMI) and vitamin and mineral deficiencies. This can leave you feeling tired, weak and affect your ability to recover from an illness. In the UK, evidence suggests that: 29% of people admitted to hospital are malnourished.
i also added my school notes :)
hope this helps :3
Answer:
Malnutrition can result in unplanned weight loss, a low body mass
Explanation:
no need
>:))ficiencies. This can leave you feeling tired, weak and affect your ability to recover from an illness. In the UK, evidence suggests that: 29% of people admitted to hospital are malnourished.
One tool scientists use to learn about the weather is radar. to use radar, a weather tower sends out radio waves and then detects the waves that are reflected back to the tower. how does radar tell scientists about the weather in a given area?
a. clouds at a higher temperature reflect more radio waves.
b. air at a lower pressure reflects fewer radio waves.
c. heavier rain or snow reflects more radio waves.
d. clouds that hold less moisture reflect more radio waves.
A radar can indicate to scientists the weather in a given area because rain or snow reflects more radio waves (Option C).
What is a weather radar?A weather radar is a device used in meteorology in order to predict weather conditions.
This device (weather radar) sends waves into the atmosphere in order to identify any type of precipitation.
In conclusion, a radar can indicate to scientists the weather in a given area because rain or snow reflects more radio waves (Option C).
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WILL MARK BRAINLIST!!
Answer:
its gonna be a female
Explanation:
While walking to the kitchen in the middle of the night, jamal tripped over an object that he could not see in the dark. which part of the cns sent a signal to help prevent jamal from falling? cerebrum hippocampus cerebellum brain stem
The part of the cns sent a signal to help prevent Jamal's fall was the cerebellum
How does the cerebellum act in balance?Balance and posture are the responsibility of the cerebellum, which coordinates body movements, uniting and articulating muscle movements so that they keep the body balanced and maintain its posture.
With this information, we can conclude that the part of the cns sent a signal to help prevent Jamal's fall was the cerebellum
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Answer:
i just took the test it is cerebellum also known as answer c
Explanation: