Answer:
Each level in the food chain is called a trophic level.The different trophic levels are primary producers, primary consumers, secondary consumers, tertiary consumers and quaternaty consumers.
Which of the following statements is NOT one of the principle observations upon which Darwin based his theory of natural selection?
a. The population size of a species would increase exponentially if all individuals that were born reproduced successfully
b. Populations tend to remain stable in size, aside from seasonal fluctuations
c. Environmental resources are limited
d. Individuals in a population vary extensively in their characteristics
e. Most of the variation observed among individuals in a population is due to environmental causes; thus, very little variation is heritable (passed on from parent to offspring)
question; both trypanosoma and plasmodium are different in .......
a) type of nucleus
b) ability to move
c) mode of nutrition
d) phylum they belong to
Answer:
mode of nutrition
Explanation:
hope it helps you
Which type of data would be categorized as quantitative?A.A survey of opinions about a politicianB.A newspaper article calling for changes to a local lawC.A database of test scores for a group of studentsD.A collection of essays describing life in a small town
Answer:
C.A database of test scores for a group of students
Explanation:
Quantitative data measures things and records values as numerical data. Only option C that measures test scores records values as numerical data.
Rest are qualitative.
Which is the answer a b or c.
it's option A
hope it helps...!!!
Which of the following does NOT
cause the urban heat island
effect?
A. impervious surfaces
B. air conditioning units
C. fuel combustion
D. lots of vegetation
Answer:
D. Lots of vegetation
Explanation:
Urban heat islands form when cities replace natural land cover with dense concentrations of heat-absorbing pavement, buildings, and other surfaces. This has the impact of raising energy prices (for example, air conditioning), air pollution levels, and heat-related sickness and mortality.
Explanation:
it's d lots of vegetarian
Explain why the radiolabel was present in the homogenate. Describe the role of light in the synthesis of ATP and NADPH and how the absence of light may have affected this process
During photosynthesis, light excites electrons in the photosystems and it is used to generate ATP and NADPH.
What is photosynthesis?Photosynthesis is a series of chemical reactions used by plants to generate carbohydrates by means of light energy (solar radiation).
During this process, light excites electrons in the photocenters and this energy can be converted to chemical energy via ATP and NADPH production.
In conclusion, during photosynthesis, light excites electrons in the photosystems and it is used to generate ATP and NADPH.
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total saturation of protein transporters for a given solute in the renal tubules would result in __________.
Answer:
absence of that solute from the urine
Explanation:
A protein transporter is involved in the transportation of the ions and the molecules. If a membrane protein transporter gets totally saturated in the renal tubules, then that solute will appear in the urine.
What are transport proteins?Transport proteins are the transporters that move the molecules, ions, and macromolecules in and out of the cell. They carry the molecules and substances across the biological membrane and allow their diffusion.
If a transport protein saturates a solute totally in the renal tubules, then that solute will get secreted in the urine as they are easily soluble in the water and the fluid of the excretion system.
Therefore, the solute will get excreted in the urine.
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what is living and nonliving in this environment
Answer:
Living: Fishes, Plants, micro-organisms etc.
Non-Living: Rocks, Clouds, Water, Air etc.
Explanation:
An object is considered as living if it has the ability to grow, and reproduce.
Otherwise, the object is considered non-living.
4.2
A plant was placed in water containing black dye. After 24 hours the
plant was removed and sections were taken from the root and the
stem.
Which diagram shows the results?
(2)
A
**
root
stem
root
stem
C
D
root
stem
root
stem
Answer:
d
Explanation:
because maths innit fam
A plant was placed in water containing black dye. After 24 hours the
plant was removed and sections were taken from the root and the
stem. In the root, cambium part will get stained and in the stem, cortex will be stained from dye so the correct option is D.
What is cambium and cortex in plant root and stem?Cambium is a layer of continuous dividing cells between xylem and phloem tissues which is responsible for the secondary growth of stems and roots. A cortex is an outer layer of a root or stem in a plant, located below the epidermis but outside of the vascular bundles.
The conduction (uptake) of water in a plant stem takes place through the xylem.
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how does diffusion helps in absorption of minerals by roots????
Answer:
The soil water enters from the higher concentration to the lower concentration by the process of diffusion.
Distinguish how an animal welfare activist would most likely feel about the animals’ housing and training in the following scenario.
A traveling circus uses a number of animals in its act, including a tiger and a small herd of elephants. When traveling, the tiger gets its own car and attendants who feed it regularly. The elephants are dispersed among three cars and each has a number of attendants who feed and clean up the elephants’ waste. To train the animals, the circus hires animal trainers who use whips to teach the animals how to behave in the ring.
Answer:
using whips on animals is not a desirable activity, as well as circus' being notorious for the mistreatment of animals, I think anybody who had these animals welfare in mind would disapprove of this scenario
Explanation: my Best guess with the contect given
Where would a region of nonpolar amino acids be in a folded protein?
in the secondary structure within the ß pleated sheet
in the secondary structure within the a helix
in the tertiary structure within the core of the protein
in the tertiary structure as part of side chains linked by hydrogen bonds
Answer:
third option should be correct
Explanation:
What is a mutation? a a misinterpretation of the daughter strand b a break down of the mRNA structures in the cell c any change in the nucleotide sequence d a function of the ribosome
Mutation can be defined as any change in the nucleotide sequence. That is option C.
What is nucleotide sequence?Nucleotide sequence can be defined as the sequence of bases that are arranged in a particular form which contains instructions for the synthesis of proteins in a cell.
When there is a change in this sequence, mutation is said to have occurred.
Therefore, Mutation can be defined as any change in the nucleotide sequence.
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DO 6. Choose the best answer.
The global swapping of people, ideas, technology, and goods was
the Columbian Exchange
O mercantilism
Humanism
feudalism
Answer:
Columbian Exchange
Explanation:
I looked up definitions and information on all the option words, Columbian Exchange seems to be a fit for the answer.
If the membrane was completely permeable,the concentration inside the cell would be about the same as the outside. Give reason?
If the cell membrane is permeable to some solute, this means the solute is free to move in or out of the cell, depending on its concentration gradient. The solute will move by diffusion from the area with high concentration to the area with low concentration. So if the concentration of this solute is higher outside of the cell compared to the inside, then it will move into the cell until its concentration is equal on both sides.
What shuffles genes and increases genetic variation in gametes during meiosis, when these homologous pairs are paired up ?
Meiosis is referred to as reduction division as it divides the chromosome number in half. Crossing over or recombination is the main reason of shuffled genes and increased genetic variation in gametes in meiotic cell division as the homologous pairs are paired up during prophase.
What is crossing over?Crossing over is referred to as the exchange of genes of DNA between paired homologous chromosomes. It actually occurs during the development of egg and sperm cells i.e., during meiosis.
It is an enzyme-mediated step, in which the exchange of genetic material takes place between non-sister chromatids of homologous chromosomes.
It actually occurs at the pachytene stage of prophase I of meiosis cell division.
Thus, it can be concluded that the crossing over is the main reason of shuffled genes and increased genetic variation.
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What is a zygote and how is it formed
Answer:
A zygote is a fertilized ovum. The germ cells undergo meiosis to reach a haploid state (n) as part of spermatogenesis and oogenesis. The sperm and the unfertilized ovum reinstates a chromosome set in zygote in a diploid state (2n).
After fusing with the sperm, the second stage of meiosis takes place for separation of chromatids. Post-fertilization, mitosis of the zygote is initiated which develops into a mature offspring exhibiting characteristics of its parent.
Explanation:
The zygote stage development occurs in the first week of fertilization. The genome of the zygote is the combination of DNA in each gamete and contains all the genetic information required to form an individual.
Answer:
Zygote is a diploid cell resulting from the fusion of two haploid gametes
it forms when a sperm penetrates the outer surface of an egg.
Which statements is true about organ systems in the human body?
Choose 1 answer:
(A) if one organ system fails, a different organ system can take its place.
(B) all organ systems carry out the same functions in the human body.
(C) organ systems interact to allow the body to live and grow.
Answer:
That is depend upon the proper function of the body
Hope it will help you to understand and help you to choose your answer yourself Thankyou
Sulfates are considered secondary pollutants because.
Sulfates are considered secondary pollutants because they result from the transformation of primary pollutants.
Reason: Primary pollutants are pollutants emitted directly into the environment while secondary pollutants are emitted after they are formed in the atmosphere.
Hope that helps!
Please help me please 20 points and ill give brainlyest!
Answer:
The correct answer is b not sure Baka
an apple falls out of a tree if gravity is the action force that is acting on it what would the reaction force be?
A) momentum
B) air resistance
C) thermal velocity
D) anti-gravity
Answer:
B) Air Resistance
Explanation:
A reaction force is the opposite of an action force, so what is opposing gravity? Momentum certainly isn't in this instance of the apple falling. Thermal velocity isn't, and anti gravity is a hypothetical phenomenon.
Answer:
B) air resistance
Explanation:
When an falls out of a tree, gravity is acting downwards, and the reaction force which counters it is air resistance.
Describe the two factors that influence the rate of weathering of rock
Answer:
rainfall and the hot temperature
Explanation:
High temperatures and a lot of rainfall increase the rate of chemical weathering.
Hope This Helped
Which combinations of traits would be possible in future generations if the genes for fur color and eye color assort independently? Select all possibilities.
Answer:
the answer would be black fur, black eyes and white fur , red eyes
Explanation:
difference between accomodation and pupil reflex?
Answer:
The pupillary light reflex compensates for changes in illumination level, whereas the accommodation responses compensate for changes in eye-to-object-viewed distance.
Explanation:
Hope this helped!
Question 7 of 10
When would a forest be sustainable?
A. When supply and demand are both zero
B. When demand increases while supply stays the same
C. When demand exceeds supply
D. When supply exceeds demand
S
Answer:
D. When supply exceeds demand
Explanation:
If you have more woods than current demand, you can save some wood to sell later and conserve the trees. This way it would be sustainable for long time.
How does the number of chromosomes in a human liver cell compare to the number of chromosomes in a human brain cell?
a
The number of chromosomes in both cells is equal.
b
The liver cell has fewer chromosomes than the brain cell.
c
The liver cell has more chromosomes than the brain cell.
d
The number of chromosomes in each cell type varies between individuals.
Answer:
A
Explanation:
All organs in the human body have the same number of chromosomes.
which body system tells the skeletal system to move?
How is a scientific experiment different from other investigations.
Explanation:
An experiment is a type of investigation, the most involved and accurate type. An experiment follows a set template of how to run. Scientists running experiments also have a question, but they predict the outcome by making a hypothesis.
20 POINTS!!
Which part of the eye contracts in bright light and expands in dim light?
retina
cornea
lens
iris
Answer:iris
hope this helps
Answer:Iris
Explanation:
Just took the test
Which mechanism of gene expression regulation is the fastest but most energy demanding of the cell?.
Answer:
Post-translational control.
Explanation:
Because this mode involves modification of an already synthesized protein, it is the fastest in terms of regulating the activity of the gene product.
