The statement 'They have a string of nuclei' describes how the protozoan Stentor overcomes cell size limitations (Option b).
What are protozoans?The protozoans (kingdom Protista) are unicellular single-celled organisms that generally live in aquatic environments.
The protozoan Stentor is a type of filter-feeding organism, which is heterotrophic and contain cilia.
In conclusion, the statement 'They have a string of nuclei' describes how the protozoan Stentor overcomes cell size limitations (Option b).
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28. What is a ribosome? What is the function of a ribosome in a cell?
Answer:
Ribosomes are composed of special proteins and nucleic acids. A ribosome functions as a micro-machine for making proteins.
Explanation:
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Answer: a tiny particle present in huge quantities in the cytoplasm of living cells that is made up of RNA and related proteins. They transport RNA and bind messenger RNA to create polypeptides and proteins.
Explanation:
In balanced translocation heterozygotes, viable gametes and progeny are produced by which pattern(s) of chromosome segregation
Answer:straight
Explanation:
One of the benefits of the degeneracy of the genetic code is that:.
Answer:
degeneracy allows multiple codon triplets to code for a single amino acid.
Explanation:
Not sure of the options, but degeneracy allows multiple codon triplets to code for a single amino acid. Like UAU and UAC both code for tyrosine.
In an area of 3 square miles there are 27 bears. What is their population density?
A. 9 bears / square mile C. 24 bears / square mile
B. 81 bears / square mile D. 30 bears / square mile
Answer:
9 bears per square mile
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Drag each item to the correct location to indicate whether it describes the American or European weather model.
USA model predicts weather out to 10 days, 21 forecasts, four models, whereas European model is most accurate, with 51 forecasts and weather out to 16 days.
What are weather models?The weather models are defined as different models used to predict the weather around the world.
The Global Forecast System (GFS) model is developed by U.S. National Weather Service and consists of four separate models (atmosphere, ocean, land/soil, sea ice).
In conclusion, USA model predicts weather out to 10 days, 21 forecasts, four models, whereas European model is most accurate, with 51 forecasts and weather out to 16 days.
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Which of the following affects the outcome of an experiment?
a
Dependent variable
b
Control
c
Standard
d
Independent variable
Autotrophs and heterotrophs are classified according to their energy pathways autotrophs are able to-
Answer:
Autotrophs and heterotrophs are classified according to their energy pathways autotrophs are able to obtain energy from the sun and they produce their own food, whearas hetertrophs obtain food from other organism
Explanation:
Hope this helps
why we find the soft parts still
remaining in a Fossil, if it trapped
in amber, or ice?
Answer:
Why dont soft parts usually leave fossils?
The hard parts of organisms, such as bones, shells, and teeth have a better chance of becoming fossils than do softer parts. One reason for this is that scavengers generally do not eat these parts. Hard parts also decay more slowly than soft parts, giving more time for them to be buried.
Explanation:
yeah
Lichens are important to the environment because _____
A) they decompose carbon dioxide
B) they produce large amounts of oxygen
C) they recycle nutrients into the environment
D) All of the above
Answer:
D- all of the above
Explanation:
A dietitian wants to track the effect of varying amounts of protein on the muscle mass of her clients. The varying amounts of protein are a(n) _____, and the resultant muscle mass is a(n) _____.
3. What device is used to measure the radiation exposure of people working with radiation?
Answer:
Geiger counters are commonly used to measure the amount of radioactivity, but there are other types of detectors that may be used
Explanation:
A marine ecosystem is represented below. top carnivores, sharks, dolphins, albatross, third-level carnivores, squid, second-level carnivores, larger fish, decomposers first-level carnivorous consumers, juvenile stages of fish, jellyfish, crustaceans, and sea stars, herbivore consumers, zooplankton and cockles, primary producers, phytoplankton and seaweed, sunlight. What is lost to the environment at each of the trophic levels of this ecosystem
The question is as follows,
A marine ecosystem is represented below (you will find the image in the attached files).
- Decomposers
6) Top carnivore: sharks, dolphins, albatross
5) Third-level carnivores: squid
4) Second-level carnivores: larger fish
3) First-level carnivores: juvenile stages of fish, jellyfish, crustaceans, and sea stars
2) Herbivore: zooplankton and cockles
1) Primary producers: phytoplankton and seaweed
- Sun provides energy to producers
What is lost to the environment at each of the trophic levels of this ecosystem?
In a trophic web, 10% of a link's energy is transferred to the following link, and the other 90% dissipates to the environment as heat. The answer is heat.
What is the trophic web?The trophic web is the interaction between different organisms involving transference of energy when some of them feed on the other ones.
The ones placed at lower levels pass energy to the ones at the higher levels.
Organisms at each level feed on the preceding one and become food for the next one.
The first link corresponds to a producer organism -autotroph-.The following links are the consumers -heter0trophs-: herbivores and carnivores.The last links are the decomposers that degrade organic matter from dead organisms.Because it is a web, all organisms are in equilibrium until a change occurs. When a sudden change affects any of the involved links, there can be a cascade effect on the web.
Any change in a link population size (increasing or decreasing) will affect the superior links and the immediately anterior link.
What is the 10% rule?From the energy that reaches the Earth's surface, only 0.1 or 1% is absorbed by autotroph organisms.
This small percentage of energy flows through all organisms in the ecosystem -from autotrophs to heter0trophs- until it dissipates in the environment.
Only 10% of energy is transferred from one level to the next one. The remaining 90% is dissipated as heat to the environment. This assessment is called The 10% rule.
This rule states that only about 10% of the energy stored as biomass at one trophic level, ends up as biomass at the next trophic level.
The progressive reduction of energy determines the number of trophic levels (4 or 5).
Heat is lost to the environment at each of the trophic levels of this ecosystem.
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Please help would be very much appreciated
can you answer this question pls
Answer:
Tumor's are formed by a rapid cell division and is given many immature cells. But by preventing mitosis it will prevent the formation of growth of new cellls and will hence the growth of a tumor.
Hope this helps :))
Propose an action plan you would implement in your backyard or in your
neighborhood community to reduce a human impact on a local aquatic ecosystem. In
your action plan proposal, be sure to address the
questions below. Provide sufficient evidence from previous lessons and scientific
reasoning to answer the questions and support your proposed action plan.
1. Where and how it would be implemented? (2 pts.)
2 Why is it a good course of action in reducing a human impact on aquatic ecosystems from
your backyard or community? (2 pts.)
3. What is one way you would monitor your action plan to ensure that it is working to
reduce human impacts into the future? (2 pts.)
There are many ways by which we can reduce human impact in the local aquatic ecosystem.
What do you mean by aquatic ecosystem?Aquatic ecosystems include oceans, lakes, rivers, streams, estuaries, and wetlands. Within these aquatic ecosystems are living things that depend on the water for survival, such as fish, plants, and microorganisms.
It will be implemented on both backyard and aquatic ecosystem. It is good course of action so that organism of aquatic ecosystem have not suffered from the human activity like cleaniness of water, no mixing of chemicals and fishing.Constant checking of quality and population of aquatic organism will ensure that human impact get reduce on aquatic ecosystem.
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Which of the following phases ends just before cell division?
A. M phase
B. G1 phase
C. G2 phase
Answer:
C
Explanation:
The G2 phase ends just before cell division as it is considered as the last phase of the process of cell division. Thus, option C is correct.
What happens in different phase of cell cycle?In eukaryotic cells, the phases of the cell cycle are divided into two major phases, which are interphase and mitotic stage. During the mitotic stage, cell divides its DNA and cytoplasm into two equal parts, thereby forming two daughter cells.
Cell division is essential for organism growth, tissue repair, healing and regeneration, and reproduction. The process by which a parent cell divides into daughter cells is known as cell division. For both single-cell and multicellular organisms, cell division is essential. Cell division can directly increase the population of single-celled organisms like Amoeba or Paramecium.
Therefore, The G2 phase ends just before cell division as it is considered as the last phase of the process of cell division. Thus, option C is correct.
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what did Mendel's cross pollination of pea plants prove (50 points pls anwser)
a Different offspring do the same parents inherit different characteristics
b pea plants can have yellow seeds or green seeds
c genes are found on chromosomes in all cells of an organism
d cross-pollination creates plants with new characteristics
Answer:
a
Explanation:
Different offspring of the same parents inherit different characteristics.
Answer: A. Different offspring do the same parents inherit different characteristics
Select the correct answer from each drop-down menu. a species was added into a particular ecosystem to control the population of a prey species. this method of introducing a new species is called . the population of the added species increased, leading to an imbalance in the ecosystem. this increase happened because .
If a species was added into a particular ecosystem to control the population of a prey species, then this method is called biological augmentation.
What is biological augmentation?Biological augmentation is a process where a newly introduced species increase the number of individuals of another species.
In this case, the population of the added species increased, leading to the competition for resources increased in the ecosystem.In conclusion, If a species was added into a particular ecosystem to control the population of a prey species, then this method of introducing a new species is called biological augmentation.
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What does a transformed e. Coli cell contain that a normal e. Coli cell does not?.
A transformed e. Coli cell contain plasmid with an ampicillin resistant gene while a normal e. Coli cell does not.
What is a Transformed bacteria?This is the type of bacteria which has been modified through the introduction of a foreign DNA.
The DNA is introduced to the e.coli which then makes it to be ampicillin resistant for research works.
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Atoms of the same element with different numbers of neutrons are called ______.
A) Downstream
B) Meltdown
C) Turbine
D) Ethanol
E) Passive solar cooling
F) Utility
G) First Law of Energy
H) Refinery
I) Isotopes
J) Second Law of Energy
Answer: I) Isotopes
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How does the carbon locked in shells of marine organisms move back to the atmosphere?
A.
through subduction of deposits and volcanism
B.
through the process of respiration in these organisms
C.
through death and decomposition
D.
through the microbial process of ammonification
E.
through chemical reactions in acidifying oceans
IT'S NOT B OR C
Answer:
Explanation:
A.
through subduction of deposits and volcanism
3.2 The data in the table below was recorded during the investigation: Distance in cm 10 20 30 40 Rate of photosynthesis (Number of bubbles per minute) 27 23 16 7 50 2. 3.2.1 Identify: (a) the dependent and (b) independent variables in the experiment. (1) (1) 3.2.2. Draw a line graph to represent the data obtained during the experiment (6) (2) 3.2.3 What conclusion can be drawn from the results above?
Answer:
i dont konew
Explanation:
the main form of glucose repression in the lac operon is
Answer:
Extracellular glucose affects the lactose operon activation by inhibiting
8. food gives the body energy, which helps the body maintain homeostasis. in the
morning, an athlete eats a nutritious breakfast to get energy to exercise. what are the
main organ systems involved in the process of food from the athlete's breakfast being
broken down into nutrients and then delivered to the cells?
a. digestive and excretory systems.
b. digestive and circulatory systems.
c. nervous and excretory systems.
d. respiratory and circulatory systems.
a. digestive and excretory systems.
6. If an exothermic reaction has reached equilibrium, then increasing the temperature will
A. favor the forward reaction.
B. favor the reverse reaction.
C. favor both the forward and reverse reactions.
D. have no effect on the equilibrium.
If an exothermic reaction has reached equilibrium, then increasing the temperature will favor the reverse reaction. So, the correct option is B.
What do you mean by Exothermic reaction?Exothermic reactions are those reactions in which the energy or heat is liberated apart from the product.
Increasing the temperature of exothermic reactions causes a decline in the concentration of products while enhancing the concentration of reactants.
Therefore, if an exothermic reaction has reached equilibrium, then increasing the temperature will favor the reverse reaction.
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How is a facial expression similar to gene expression?
Explanation:
But researchers in Israel have done a study showing that families have characteristic facial expressions, ones even shared by blind members of the families. The results suggests that such expressions may be inherited and thus under some genetic control.
1. Briefly explain how multicellular organisms can develop from a single cell:
Answer:
Plants, animals and fungi are the most spectacular and complex achievements of this kind. There are essentially two ways to make a simple multicellular entity out of single cells: either a single cell divides and its offspring stick together, or several solitary cells aggregate to form a colony
Explanation:
what is needed to create a self-sustaining ecosystem inside of a dome?
Most falcons, a type of bird, lay two to four eggs at a time. Those falcons that produce fewer or more than this have reduced fitness. Which of the following selection best describes this?
a. directional selection
b. disruptive selection
c. stabilizing selection
Answer: C. Stabilizing selection
Explanation:
Give an example of a negative feedback loop.