Answer:
the number that below the perch in the food chain is 5,000 units of DDT
Explanation:
The computation of the DDT accumulated in its body is shown below:
= 100 units minnows × 50
= 5,000 units of DDT
hence, the number that below the perch in the food chain is 5,000 units of DDT
Therefore the same would be considered
Which statement is incorrect about the Geologic Time Scale? A Life was not present when the Earth was still cooling. B Prokaryotes showed up on Earth long before any long reptiles and Small plants. C Modern humans arrived later than reptiles and small plants D Dinosaurs showed up just after the Earth was created.
Prokaryotes showed up on Earth long before any long reptiles and Small plants statement is incorrect about the Geologic Time Scale
what are the characteristic features of prokaryotic cell ?Prokaryotic cells are microorganisms include Bacteria and Archaea while other photosynthetic prokaryotes are cyanobacteria which do photosynthesis.
A prokaryotic cell is a single membrane bound cell where all the metabolic reactions occur within the cytoplasm, free-living or parasites in nature, they lack nuclear membrane.
In prokaryotes the organelles like Mitochondria, Golgi bodies, chloroplast, and lysosomes are absent, whereas genetic material is present as a single chromosome;
The prokaryotic cell divide by binary fission where as the sexual mode of reproduction involves conjugation.
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Guys answer please Guys I need help in biology in DNAnalyse
Which period of time had MORE carbon: pre-industrial or post-industrial revolution?
Why are interactions between species so important to the survival of one or more species? Give an example. I
Answer:
Okay, this one is pretty in-depth, but it's an example none the less.
Explanation:
Take bees, plants, deer, and wolves. All of which are technically species. One is a producer, and three of them are consumers. Bees pollinate plants. The bees now have their food, and the plants are reproducing. The plants are food for the deer. The deer are eating, surviving, and reproducing. The deer are then eaten by the wolves. There ya go. Hope this helps.
Why don’t rivers run straight?
Answer:
Rivers don't run straight because water flows in the least path of resistance
Explanation:
It is small disturbances in topography that set off reactions that alter the path of a river Any kind of weakening of the sediment on one side of a river due to animal activity it could also be because of soil erosion, or human activity can draw the motion of the water towards that side.
Species like fish and turtles have many predators. These species produce more offspring than will survive. Which of the following correctly addresses an advantage and disadvantage of the overproduction of offspring?
Species have an increased chance of survival and parents are able to care for the young.
Competition of resources in the environment is reduced and species have a decreased chance of survival.
Overproduction of one species can threaten another species and species can become resistant to medicine.
Populations of species have increased genetic variation and competition for resources in the environment is increased.
Answer:
D?? I hope this helps.
Explanation:
The researchers set up experimental and control microcosms, or small artificial ecosystems, to measure the release of minerals from rocks. First, they placed rock fragments of volcanic origin, either granite or andesite, into small glass containers. Then they made a suspension of water and macerated (chopped and crushed) moss of the species Physcomitrella patens. They added this mixture of water and moss to the experimental microcosms. For the control microcosms, they filtered out the moss and just added the water. After 130 days, they measured the amounts of various minerals found in the water in the control microcosms and in the water and moss in the experimental microcosms. How did the setup of the control and experimental microcosms differ
Answer:
The correct answer is - Control microcosms did not contain living moss, while experimental microcosms did contain living moss.
Explanation:
The difference between the control microcosms and experiment Microcosms is, the presence of the living moss in the experimental group whereas the control group does not contain living moss.
The independent variable in this research setting is the presence or absence of the living moss and for the control group, the mosses are filtered out and only added the water.
Why is the population of different deciduous tree species limited during winter time?
Answer:
Because trees don't produce food during the winter, they don't have the energy that it takes to maintain their leaves. ... This chemical triggers the tree to shed its leaves and to halt all growth to save energy.
Explanation:
when an organism reproduces through asexual reproduction, how many parent organisms contribute DNA to the offspring?
Answer:
Asexual reproduction produces offspring from just one parent. These offspring are genetically identical to that one parent.
Explanation:
Which brand contains the smallest DNA fragments?
What term describes the technique that was used to generate the results shown in the figure
Answer:
2) C) band C
3) B) PCR
Explanation:
When a crocodile has birds in its mouth, what symbolic relationship does it represent?
Answer:
The symbiotic relationship between the crocodile and the plover bird is exemplary of two organisms working together. The plover bird flies inside the crocodile's mouth, which may seem dangerous for the bird and food for the crocodile
Explanation:
Which of the following is NOT a primary mineral?
A. Mica
B. Feldspar
C. Quartz
D. Limestone
Answer:
D
Explanation:
limestone isn't a primary mineral
What determines what dreams a person has when they sleep?
I need help on this
Answer:
The amount of sleep people get is a huge factor in the determination of dreams a person has. Lack of sleep causes your brain to become more active than it should be at night. For example, if you hadn't had enough sleep, you're more likely to have nightmares or vividly dream.
Probably what the person will experience later on in their life, or what they think about is what determines their dreams~
I hope this helped!~ Have a great day~
~Keiji❤
Please remember to eat, you are valid and someone loves you~!
Gigi was trying to classify an animal as a mammal. What would be the best characteristic of a mammal?
A. having lungs to breathe B. giving birth to live young C. giving milk to its young D. having an endoskeleton
Answer:
Giving milk to its young
Answer:
C
Explanation:
Mammals are the only class of animals that feeds their young with milk they produce which is called mammalian milk or "True Milk".
According to Darwin, what is evolution?
Answer:
Darwin defined evolution as "descent with modification," the idea that species change over time, give rise to new species, and share a common ancestor.
Use your own words to summarize the steps of the specific immune response. Identify each step and the function of the immune cell involved in that step
Answer: The steps of a specific immune response includes: antigen recognition --> antigen presentation--> clonal expansion--> attack.
Explanation:
In the resistance of the body to infection, the human body has the ability to develop extremely powerful specific immunity against individual invading agents such as lethal bacteria, viruses, toxins and even foreign tissues from other animals. A typical example of a specific immunity is the ADAPTIVE or ACQUIRED IMMUNITY. This is defined as the immunity caused by a special immune system that forms antibodies and/ or activate lymphocytes that attack ans destroy the specific invading organisms or toxins.
There are two types of adaptive immunity which include the cell mediated immunity and the antibody mediated immunity.
The steps and the cells involved in these specific immune response includes:
--> ANTIGEN RECOGNITION: these invading organisms or agents contains one or more specific chemical compounds in its makeup that are different from all other compounds. These substances are called ANTIGENS. The T -lymphocytes and the B- lymphocytes are able to recognise and be sensitized by these antigen particles.
--> ANTIGEN PRESENTATION: These antigens need to be presented to the T- lymphocytes unlike the B- lymphocytes that bind antigen particles without having to be presented by any antigen presenting cell. Example of antigen presenting cell is the MACROPHAGES. they present the antigen to T-lymphocytes by engulfing and digesting the antigen which they transport the most antigenic fragment to their own cell membrane where it is displayed on their surface.
--> CLONAL EXPANSION: After presentation of the antigen to the T- lymphocytes, it stimulates the division and proliferation of the T- lymphocytes to produce specialised T- lymphocytes which will attack the original antigen in different ways.
--> ATTACK: After clonal expansion of T-lymphocytes the specialised T- lymphocyte cells produce initiates different attacks. These cells include:
• Memory T- cells: these long-lived cells survive after the threat has been neutralised and provide specific immunity by responding rapidly to another encounter with the same antigen.
• Cytotoxic T- cell: they directly inactivate any invading target cell and release powerful toxins.
• Helper T-cells: These cells produce special chemicals called cytokines which support and promote Cytotoxic T-lymphocytes and macrophages.
•suppressor T-cells: These cells act as 'brakes', turning off activated T- lymphocytes thereby limiting the powerful and potentially damaging effects of the immune response.
All organisms in the kingdom Fungi can be described by which of these characteristics?
Answer: multicellular? try that i'm not 100% sure
Explanation:
Answer:
B. Cell wall made of chitin
Explanation:
Chitin is something that only fungi have.
yall please help me!!!
If your name were a scientific name, which part would be the species?
Answer:
The first part of the name
Explanation:
The first part of the name indicates what the species belongs to.
Explain why tongue rolling ability is a discontinuous variation
Since tongue rolling ability is determined by a single gene with two separate alleles—the dominant allele, which codes for tongue rolling ability, and the recessive allele, which codes for tongue rolling incapacity—tongue rolling ability is a discontinuous variation.
What is Tongue rolling ability?The hereditary characteristic known as tongue rolling ability controls whether or not a person can roll their tongue into a tube shape. This characteristic is frequently used as an illustration of a straightforward hereditary trait with discontinuous variation since there are only two possible outcomes: either a person rolls their tongue or they do not.
Either a person has the recessive allele, which prevents them from rolling their tongue, or they have the dominant allele, which allows them to roll their tongue. There is no intermediate or in-between trait, and the presence or absence of the dominant allele is a distinct, plainly observable phenotype.
Therefore, the capacity for tongue rolling is an illustration of a discontinuous variation.
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Since sun can filter to the bottom of a pond because it is shallower than a lake, what would you find at the bottom of a pond that you won't find at the bottom of a lake? A. Rocks B. Fish C. Plants D.Mud
Answer:
The correct answer is - C. Plants.
Explanation:
As we know and also given that the pond is usually smaller and shallower than a lake. Due to this reason, ponds have plants growing on the bottom of them from one side to the other as they get enough light as there is only the photic zone in ponds.
In lakes, there are various zones present and the lakes are deep and big to the ponds and the bottom of the lakes did not get sunlight. Plants require sunlight to grow and lakes are usually too deep to get the sunlight for plants to grow on the bottom.
I need help quick please and thank you
Answer:
Honey, we need to read the passage in order to help you answer the questions :)
Explanation:
Which is the BIGGER (less specific) group? *
A. Phylum
B. Kingdom
C. Species
Answer:
C
Explanation:
These groups, from largest to smallest are Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.
Which of the following scenarios represents change to an ecosystem brought about by biotic factors?
a.
a wildfire caused by lightning striking a tree
b.
a flood caused by a severe storm
c.
a landslide caused by cattle overgrazing
d.
a volcano
Please select the best answer from the choices provided
A
B
C
D
Answer:
C
Explanation:
Based on the cladogram shown in the
image, which group has a common
trait that all the other groups share?
Answer: I put Mammals, The victim was not stubbed.
Explanation: im not really sure about but the final answer for the presentation/assignment is "Professor Astro used a cougar attack in the kitchen"
Describe the borders of Israel after the 1948 War?
Answer:
Israel borders Egypt, Jordan, Lebanon, Syria, and the Palestinian territories of West Bank and the Gaza Strip; it shares maritime borders with Cyprus.
Explanation:
yayy boom
A(n) what is a chemical produced by one animal to influence the
behavior of another animal of the same species?
Explanation:
The answer is ( faramones). for mating purposes..
What is cyclone?
Hey any body here
#Pari here.
Answer:
yes I m there
Explanation:
what happened
Biology I (20 points)
Help :/
An error in gamete formation results in a zygote with an XXY chromosome combination. Which characteristic of an individual is affected by this combination?
Answer:
The XY chromosomes refer to the gender chromosomes and a mutation to where a child is born with XXY chromosomes would mean that the child Would have Klinefelter syndrome. A child with XX chromosomes is a female and a child with XY chromosomes is a male. The mutation has an extra gamete.
I hope this helps! :)
The correct answer for the given question about Klinefelter syndrome is Sex characteristics Traits.
What is Klinefelter syndrome?The XY chromosomes are the gender chromosomes, and Klinefelter syndrome would result from a mutation that caused a kid to be born with XXY chromosomes. When a male kid is born with extra X chromosomes, this condition develops.One X and one Y chromosome make up the majority of male, and an additional chromosome might give a male various different physical characteristics.When the genetic material breaks unevenly in the egg, an additional X chromosome is created. It may also manifest if the sperm's genetic material divides unevenly.Thus we can conclude that such condition will be called as Klinefelter syndrome as Sex characteristics Traits gets affected.
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in prophase 1 of meiosis, crossing over results in
Answer:
Crossing over results in Genetic Recombination.
Explanation: