Answer:
D. 204
Explanation:
proportion : 12/70 = 35/x
70(35)=12x
2450=12x
204.166667=x and round it to make it 204.
The best estimate of the number of fish in the pond is 204. Thus, option D is correct.
Calculation:
proportion : 12/70 = 35/x
70(35)=12x
2450=12x
204.166667=x and round it to make it 204.
What is average speed?Average speed has been defined as the total distance travelled in total time taken it means that we can calculate the average speed obtained by an object .
Mathematically,
Average Speed = Total distance travelled/Total time taken
It's S.I unit is meter/second
Average speed is a scalar quantity it means that it has only magnitude not direction.
Ecosystem has been the branch of science that deals with the study of relationship between living organisms and natural phenomena. Ecosystem has the system in which both living as well as nonliving organisms are present in a particular location.
Green plants contain chlorophyll and they prepare there own food in the presence of sunlight and the process is known as photosynthesis. In the process of photosynthesis light energy converted into chemical energy.
Therefore, The best estimate of the number of fish in the pond is 204. Thus, option D is correct.
Calculation:
proportion : 12/70 = 35/x
70(35)=12x
2450=12x
204.166667=x and round it to make it 204.
Learn more about average speed here:
https://brainly.com/question/12322912
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Is this statement true or false? The period before we have written records is called prehistory. true o false
Answer:true
Explanation:
Autism is a neurological disorder thought to be caused by mutant alleles of one or more genes. Scientists had been wondering why the number of children diagnosed as autistic increased dramatically in a decade, from 1 in 500 in 2002 to 1 in 88 in 2012. Researchers now think that they might have found at least part of the answer: Men are fathering children at later and later ages. A paper published in the journal Nature in 2012 showed a correlation between paternal age and the incidence of autism; the age of the mother was not a factor. How does this observation provide a possible explanation for the apparent increase in the rate of autism?
Answer:
There is an accumulation of genetic mutations in the DNA of sperms due to its constant mitosis.
Explanation:
The germinative cells that will become sperms are under constant mitosis. During this process, DNA mutations can happen and be transmitted from one generation of cells to the other as the years go by, and more cell divisions take place, more mutations the DNA in the sperm will have. When the number of mutations reaches a certain level, his child will express these mutations and have autism.
The egg of the mother is not a factor because the germinative cells in women are not under constant mitosis, so there is not an accumulation of gene mutations. Women are born with an exact number of eggs for all their life.
5)
Which statement is an example of an inference that a student makes to determine that this is likely a plant cell?
A)
The cell is too small to be seen by the eye.
B).
The cell appears to have a nucleus and vacuoles.
Eliminate
The cell appears to have a large area of cytoplasm.
D)
The cell appears to be rectangular in shape and has a cell wall.
Answer:
D) the cell appears to be in a rectangular shape and has a cell wall
Explanation:
animal cells don't have cell walls
What is the composition of hair?
Answer:
The hair is made up of 95% keratin, a fibrous, helicoidal protein (shaped like a helix) that forms part of the skin and all its appendages (body hair, nails, etc.). Keratin is synthesized by keratinocytes and is insoluble in water, thus ensuring impermeability and protection for the hair.
Explanation:
Which of the following is true of food webs?
a. Food webs don't actually exist in nature.
b. A food web shows the flow of decomposers
from producers to consumers and, finally, to
producers.
c. In food webs, detritivores break down organic
waste to return nutrients to the ecosystem.
d. When diagramming food chains and food
webs, the arrows should be drawn from the
lower trophic levels to the higher levels to
show the flow of energy.
e. As energy is moved up the food web, most of it
is conserved by the species in the next trophic
levels.
Answer:E
Explanation:
What happens to a watershed if it rains
Answer:eh water could either be drained into the soil or land on plants to become dew
Explanation:i searched up what a watershed was lol
A focus of environmental science not studied in ecology is the
Answer:
The influence of human activities on the environment
Explanation:
Anthropogenic activities may have negative effects on the environment by declining its biodiversity and by reducing natural resources. Human activities affect the environment through the use of fossil fuels (greenhouse gases), by contributing to the pollution of extensive areas, by overpopulation, eutrophication, deforestation, etc. The most significant effects of anthropogenic activities include the loss of biodiversity, climate change (global warming), habitat fragmentation, environmental degradation (e.g., ocean acidification), the introduction of invasive species, species extinction, etc.
Answer:
Ecology is the study of all organisms in an environment
Environmental science is the study of the interrelatedness of everything in that environment
Explanation:
what are 3 ways your skin protects you
Answer:
The skin protects us from microbes and the elements, helps regulate body temperature, and permits the sensations of touch, heat, and cold.
5. If a galaxy is moving away from us, what would happen to the wavelengths of light that we see? How
would that change what we see?
The visible light spectrum. Redshift and blueshift describe how light shifts toward shorter or longer wavelengths as objects in space (such as stars or galaxies) move closer or farther away from us. ... When an object moves away from us, the light is shifted to the red end of the spectrum, as its wavelengths get longer.
what follows a first quarter moon but comes before a full moon
Which of the following could not easily cross the plasma membrane? A. Water B. Carbon dioxide C. Oxygen D. All of the above could easily cross the plasma membrane.
Answer:D
Explanation:all of the above.
They are simple molecules that can cross the plasma membrane by passive diffusion.
Answer:
Water
Explanation:
Water needs osmosis but the other 2 can easily cross - my textbook
Who were the earliest Astronomers
Answer:
The Ancient Greeks developed astronomy, which they treated as a branch of mathematics, to a highly sophisticated level. The first geometrical, three-dimensional models to explain the apparent motion of the planets were developed in the 4th century BC by Eudoxus of Cnidus and Callippus of Cyzicus.
Explanation:
I hope it helped
Answer:
Most of the earliest Astronomers were the Ancient Greeks.
How do your interactions
with nonliving systems affect your
environment?
Explanation:
Interactions between different organisms are numerous and are usually described according to their positive (beneficial), negative or neutral effect on others.
The interactions between living things and their non living environment makes up a total ecosystem; understanding any one part of it requires knowledge of how that part interacts with the others. Ecosystems do not ‘collapse’ but do change in function, structure and composition over time due to natural or human disturbance (examples include the impact of drought, flooding, mowing and herbicides).
Which of the following statements regarding restriction enzymes is NOT true?
A) Most restriction enzymes recognize sequences of 20-25 bp in length.
B) Bacteria can add methyl groups to their DNA to prevent digestion by endogenous restriction enzymes.
C) Most restriction enzymes recognize palindromic sequences in host DNA.
D) Restriction enzymes may produce either sticky or blunt ends when digesting host DNA.
Answer:
The correct option is option A
Explanation:
Restriction enzymes are endocleases that cleave DNA fragment (of usually four, five or six nucleotide long) at specific sites to produce blunt or sticky ends. They recognize palindromic sequences of host DNA when cleaving the specific sites. The sequences below (on complementary strands) give an example of a palindromic sequences.
5'-CCC║GGG-3'
3'-GGG║CCC-5'
As can be seen above, when read from 5' to 3', the two sequences are the same despite being on opposing strands. And when cut between the guanine (G) and cytosine (C) (as shown above), it produces a blunt end. But when cut as shown below produces a sticky end.
5'- G║AATTC -3'
3'- CTTAA║G -5'
The explanation above shows options C and D are right while option A is wrong (hence the correct option).
Also, bacteria prevent their own DNA from been digested by restriction enzymes by adding methyl group to their restriction sites which prevents restriction enzymes from recognizing restriction sites of their DNA; this generally makes bacterial DNA to be highly methylated. This explanation makes option B right also.
What biome receives the least rainfall
Answer:
deserts
Desert biomes are the driest of all the biomes. In fact, the most important characteristic of a desert is that it receives very little rainfall. Most deserts receive less than 300 mm a year compared to rainforests, which receive over 2,000 mm.
Explanation:
Water molecules attract each other. Attraction between similar molecules is referred to as
Answer:
Explanation:
the attractive forces between similar molecules is referred as cohesive forces water molecule attract each other through cohesive forces and has strong cohesion because of strong hydrogen bonding
Carla, who is participating in a dichotic listening study, is asked to ignore any information that is presented to her right ear. She finds that she has no problem doing this except for when she thinks she hears her name in her right ear. Carla is experiencing:
a) the cocktail party effect.
b) blindsight
c) inattentional blindness
d) change blindness
A biomass pyramid of an ecosystem is shown.
Tertiary consumers
Secondary consumers
Primary consumers
Producers
Which statement provides the best explanation for the difference in biomass of organisms found at each trophic level?
A. Organisms at higher trophic levels have less energy available to them than organisms at lower trophic levels.
B. Organisms at higher trophic levels require smaller habitats than organisms at lower trophic levels.
c. Organisms at lower trophic levels provide less energy than organisms at higher trophic levels.
D. Organisms at lower trophic levels outcompete organisms at higher trophic levels.
Answer:A
Explanation:
The statement provides the best explanation for the difference in biomass of organisms found at each trophic level is: organisms at higher trophic levels have less energy available to them than organisms at lower trophic levels.
WHAT IS TROPHIC LEVEL:Trophic level of an organism refers to the position of the organism in the flow of energy in an ecosystem. Organisms feed on one another in an ecosystem to obtain energy needed for their metabolic activities. More energy is contained in lower trophic levels than that of higher trophic levels. This means that, according to this question, more energy is in the producers than tertiary consumers.Therefore, the statement provides the best explanation for the difference in biomass of organisms found at each trophic level is: organisms at higher trophic levels have less energy available to them than organisms at lower trophic levels.
Learn more about trophic level at: https://brainly.com/question/13267087
Diagram of exhalations
Answer:
Explanation:
Which of the following is NOT a function of proteins?
Answer:
the following is not a function of protein is glucose
Question 10 (2 points)
(01.03 LC)
If a box on a pan balance reads 10 kg, you can be confident that the number represents the object's
(2 points)
Оа
hardness
Ob
mass
ос
temperature
Od
weight
Submit
Saved at 5:48 am
Time left for this
assessment:
11:20
Answer:
mass
Explanation:
because the unit kg is S.I unit of mass
3. Which people require knowledge of Earth science and chemistry in order to do their job? astronauts O chefs O artists O sound technicians
Answer:
astronauts
Explanation:
An astronaut is a trained personnel who is authorized to work for the spacecraft and works related to space travel. Academic subjects related to the study of the astronaut are electrical engineering, astrophysics, biochemistry, aeronautics, and geology. The astronauts' works are inclined towards performing experiments, launching satellites, and exploring the space.
How do I explain this? ‘The plant shows the characteristic responding to environment because...’
phototropism : shoot grows upwards in response to light stimulus.
hidrotropism : roots grow to the area with the highest water concentration.
geotropism : a coordinated process which shoot grows against gravity while root grows down the gravity.
please help...Which statement about the Sun is true? A:The Sun makes energy on the inside. B:The Sun uses energy from the planets. C:The Sun reflects energy off the stars. D:The Sun takes energy from outer space.
Which foods would have the following nutrient test results? (results shown below)
a. beef, peanut butter, tuna
b. apple juice, honey, orange juice
c. candy, table sugar, cola
d. pasta, bread, crackers
What makes amino acids different from each other?
A) Amino group
B) Carboxyl group
C) Hydrogen atom
D) Side chain
Can somebody help me ASAP , I’m timed!
Answer:
B.
Explanation:
B. carbon decays relatively quickly.
Science question:
Explain the differences between crystal and crystallization
what is it called when an environmental factor changes the shape of an enzyme so that it no longer works to catalyze a reaction? a) killing the enzyme b) lowering the activation energy c) induced fit d) denaturing the enzyme
Answer:
c) infused fit
is correct option ...
Answer:
[tex]\boxed {\tt D. \ Denaturing \ the \ enzyme }[/tex]
Explanation:
Enzymes are special proteins that speed up chemical reactions. They have specific shapes that correlate to their functions. They also have optimal temperature and pH ranges. They should be in the range for the best results.
If an enzyme is placed in an extreme temperature or pH, the enzyme will become denatured. The enzyme will fold in a different way and its unique shape will be altered. As a result, the enzyme will slow down or stop working.
Therefore, the correct answer is D. denaturing the enzyme.
Worksheet 5 Cell Division for students answerkey from umuc
Answer:
binary fission,meiosis and
mitosis,