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Recently Posted Questions in Biology

Which is larger 8.5 or 8.27?

8.5 is the greater value.

hope this helps you

Where are traits stored in the nucleus?

Traits are located on "Chromosomes" in the nucleus

Hope this helps!

Three requirements of an efficient respiratory system

Respiratory surface must be moist so gasses can diffuse across cell membranes
cells lining respiratory surface are thin to optimize gas fusion
respiratory surface are must be large to allow for adequate gas exchange

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Which produces the sediments that ultimately lead to soil formation? A. rivers B. plants C. weathering D. rainfall

I think the correct answer from the choices listed above is option C. It is weathering that  produces the sediments that ultimately lead to soil formation. Weathering is the breaking down of rocks, soil, and minerals as well as wood and artificial materials through contact with the Earth's atmosphere, waters, and biological organisms.

Which of the following statements about tolerance range is true? a. Tolerance range is different for different organisms. b. The tolerance range is the total number of organisms that can be supported by an ecosystem. c. Tolerance range is affected by biotic factors in an ecosystem. d. The available water supply does not impact an organism’s tolerance range.

I think the correct answer from the choices listed above is option A. Tolerance range is different for different organisms. Animals can tolerate (or survive within) a certain range of a particular factor, but cannot survive if there is too much or too little of the factor.  But this range depends on the organism. Hope this answers the question.

Which of the following is not a use for a weather radar? a. forecasting weather b. locating precipitation c. determining type of precipitation d. measuring temperature

Answer: Measuring temperature

Explanation:

Weather radar is a weather surveillance device which is used to locate and detect the precipitation, calculate the motion of weather and estimate the weather condition. It is also not used to measure the weather conditions of a region.

It can measure the intensities of rain, snow and hail and other phenomena. It does not measure the temperature of the region.

The higher invertebrates are divided into two evolutionary lines, protostomes and deuterostomes. This division is based on which developmental feature? A.wether the blastopore ultimately develops into a mouth or an anus B. wether the embryonic cells undergo spiral or radial cleavage C. wether the coelom forms by splitting the mesoderm or through the pocket of the gut.

Answer:

A. whether the blastopore ultimately develops into a mouth or an anus

Explanation:

The higher invertebrates are divided into two evolutionary lines named protostomes and deuterostomes based on whether the blastopore ultimately develops into a mouth or an anus. Blastopore is the first developement opening of archenteron (rudimentary alimentary canal) which appears during gastrula stage. If during embryonic development, the blastopore develops into mouth then the animal is known as protostome whereas development of anus from blastopore will make the invertebrate a deuterostome.

Invertebrates like annelids, arthropods and molluscs are examples of protostomes while echinoderms are examples of deuterostomes.

Select the best description for each cycle: 1.Hydrologic A. photosynthesis and respiration 2.Rock B. erosion, deposition, metamorphism 3.Tectonic C. housed mostly in rock material 4.Carbon D. it's all about water 5.Nitrogen E. subduction, uplift, and mantle convection 6.Phosphorus F. it's all about special bacteria

The right matches are:

1.Hydrologic is matched with D. it's all about water

Hydrology is the science of the earth which is interested in the terrestrial branch of the water cycle, that is to say in the exchanges between the atmosphere, the terrestrial surface and its subsoil. We speak of hydrosphere to designate the part of the planet in which water is located.


2.Rock is matched with B. erosion, deposition, metamorphism

Rocks are natural materials generally solid and formed, essentially or entirely, by an assemblage of minerals, sometimes including fossils (especially in sedimentary rocks), glass resulting from the rapid cooling of a liquid (volcanism, friction .. .) or aggregates of other rocks. The rocks can be formed of a single mineral species (monomeral rocks) or of several (polymineral rocks):


3.Tectonic is matched with E. subduction, uplift, and mantle convection

Tectonics is the study of geological structures of kilometric scale and more, such as mountain ranges or sedimentary basins, and mechanisms that are responsible. This discipline is directly related to plate tectonics.

The lithosphere, the rigid outer shell of the Earth consisting of the crust and part of the upper mantle, is subdivided into plates, called tectonic or lithospheric plates.


4.Carbon is matched with A. photosynthesis and respiration

The 2 main carbon "reservoirs" most directly involved in this cycle are the atmospheric CO2 and the carbon constitutfs of living beings. During photosynthesis, CO2 and water combine (reduction reaction) under the effect of light energy (sun) to form carbohydrates.

Then, in all organisms, these carbohydrates are oxidized to reform water and CO2 during breathing. Part of the energy contained in carbohydrates is converted into ATP. Up to 35% of the CO2 fixed during photosynthesis is released during leaf respiration.


5.Nitrogen is matched with F. it's all about special bacteria

Special bacteria pick up nitrogen and release it in a form that can be assimilated by the plant

To be absorbed by the plant, the nitrogen present in the atmosphere in N2 form must undergo biological transformation processes carried out by microorganisms called nitrogen-fixing bacteria. These nitrogen-fixing bacteria have the main function of capturing the nitrogen present in the air, but also in the soil (thus limiting the losses in the aquifers), and to return it to the plant in an available and assimilable form. Nitrogen in soil is in NO3- form (soil nitrate) and nitrogen in air is in N2 form (atmospheric nitrogen).


6.Phosphorus is matched with C. housed mostly in rock material

Global phosphate mineral resources are estimated at more than 300 billion tonnes in 2014 (US Geological Survey). The largest sedimentary deposits are found in North Africa (Morocco), China, the Middle East and the United States. The exploited phosphorus deposits come mainly from sedimentary or marine deposits, but also magmatic deposits or guano from exotic marine birds.


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Arrange these energy sources from highest to lowest percentage of worldwide use. Fossil fuels Nuclear power Geothermal power

The correct order of arrangement of energy resources from highest to lowest usage world wide is fossil fuels, nuclear energy and geothermal energy.

A fossil fuel is a energy source formed by the dead remains of living organims over millions of years through the natural process. It includes the coal, petroleum and the natural gas which are the highly used energy resources all over the world. Nuclear energy is the energy generated during the fission or fusion of nuclear reactions which is used to generate electricity. It is one of the low carbon power methods to generate electricity. Geothermal energy is the thermal energy or the heat energy stored in the earth which is used to produce electricity.

Thus, fossil fuels forms the first energy resource to be highly used worldwide.

Which of the following body systems work together to get cells the nutrients they need to carry out cellular respiration ? A) the digestive and respiratory systems B) the respiratory and circulatory systems C)the digestive and circulatory systems D) the circulatory and excretory systems

I believe the correct answer from the choices listed above is option B. It would be the  respiratory and circulatory systems that work together to get cells the nutrients they need to carry out cellular respiration. They are responsible in providing oxygen and other nutrients throughout the body.

Which of the following may display two different grain sizes? a. metamorphic rock c. igneous rock b. sedimentary rock d. magma

Answer:

b. sedimentary rock

c. igneous rock

Sedimentary and igneous rocks may display two different pore size. According to a rough estimate the grain size of Sedimentary rocks is 5mm and grain size of igneous rock is 2mm.

One characteristics of all living organisms is that they

Breath oxygen and they are made up of 1+ living cells

The organism shown in the drawing usually reproduces through the _________ process called binary fission. A) asexual B) heterosexual C) isosexual D) sexual

The best and most correct answer among the choices provided by the question is the first choice or letter A. The organism shown in the drawing usually reproduces through the asexual process called binary fission. I hope my answers has come to your help. God bless and have a nice day ahead!

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Which best describes reproduction? Asexual reproduction may lead to an accumulation of mutations in the DNA. Sexual reproduction allows for diploid gametes to combine to increase genetic variation. Asexual reproduction leads to the formation of haploid gametes. Sexual reproduction allows for more gametes to be formed than asexual reproduction does.

The best and most correct answer among the choices provided by the question is the second choice. The statement "Sexual reproduction allows for diploid gametes to combine to increase genetic variation." best describes reproduction. I hope my answers has come to your help. God bless and have a nice day ahead!

Local topography and sea surface temperature contribute to differences in climate between various localities.

The correct answer for the given statement above would be true. Yes, it is true that local topography and sea surface temperature contribute to differences in climate between various localities. In fact, these factors contribute largely towards variations in the climate of places. Hope this answers the question.

Is blood sugar regulated by positive or negative feedback?

Blood Sugar regulates by negative feedback in order to keep the body in Homeostasis. 

Who postulated the “nature versus nurture” hypothesis? a.Charles Darwin b.Francis Galton c.Sigmund Freud d.Erik Erikson

I believe the correct answer from the choices listed above is option A. It is charles darwin who postulated the “nature versus nurture” hypothesis. The phrase nature and nurture relates to the relative importance of an individual's innate qualities as compared to an individual's personal experiences in causing individual differences, especially in behavioral traits. 

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Why do you think plasmids and bacterial cells are such important tools in genetic engineering?

Plasmids contain extra nucleoid genitic material. By virtue of plasmids bacteria have won their battle againt the miracle drugs like penicillin, streptromycin, asprin etc. Well genitic engineering retrieves their adapted and evolved tendencies to be applied for a long lasting cure.


I hope my answers has come to your help. God bless and have a nice day ahead!

The slowest type of mass movement, which involves the lifting and contracting of soil particles over time, is called a.) a rockslide b.) an earthquake c.) creep d.) rockfall

HI there

i believe the answer is creep creep takes a long time to do its job so i believe this is your answer

hope this helped you!

A bird stalks, kills, and then eats an insect. Based on its behavior, which pair of ecological terms describes the bird? herbivore, decomposer producer, heterotroph carnivore, consumer autotroph, herbivore

For the answer to the question above, A carnivore is an animal that gets food from killing and eating other animals. Carnivores generally eat herbivores, but can eat omnivores, and occasionally other carnivores. So my answer would be the third choice. Carnivore, Consumer.

The Gaia hypothesis is an example of _______. a. positive feedback b. negative feedback c. glacial episodes d. system overload

The Gaia hypothesis is an example of negative feedback.

Further Explanation:

Negative feedback is seen in Gaia hypothesis. This hypothesis is a theory given by James Lovelock stating that organisms interact with their inorganic environment to establish a complex system that will enable them to maintain and survive on the planet. Gaia hypothesis is a theory which is given by James Lovelock. This theory posits that the organic and inorganic components of earth evolved as a self-regulating system or a single living.

In the negative feedback mechanism, there is a negative correlation in between the process rate and the concentration. They control the process rate to prevent substance accumulation. Majorly negative feedback is involved to maintain the homeostasis in the environment. They help in achieving equilibrium state by going back to the normal state.

According to this theory, the living system on the planet automatically controlled atmospheric content, global temperature, ocean salinity, and other factors also which maintain their own habitability. This entity has controlled the self-regulatory negative feedback that helps in keeping the planet conditions within boundaries that are more favorable to an individual’s life.

Learn more:

  1. Learn more about cell organelle brainly.com/question/5923583
  2. Learn more about the diffusion brainly.com/question/1386629
  3. Learn more about the plant brainly.com/question/862697

Answer Details:

Grade: High School

Subject: Biology

Topic: Feedback Mechanism

Keywords:

Negative, feedback, Gaia hypothesis, organic, inorganic, substance, normal state, life, favorable, homeostasis, equilibrium, environment, accumulation, concentration.

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