Answer:
1. DDT may alter the central nervous system of the animals living in an ecosystem contaminated with this synthetic insecticide, thereby affecting their food relationships
2. Yes, indeed it has been shown that the incidence of deaths by cancer is significantly higher in areas where DDT is used as an insecticide. Moreover, it also been shown that this compound alters the endocrine system of most animals.
3. DDT is a synthetic biomolecule insoluble in water and persistent in the environment, and it is therefore a severely hazardous formulation. Persistent organic pollutants include synthetic organochlorine pesticides (for example, DDT), industrial chemicals, especially toxic polychlorinated biphenyls such as those used in insulating fluids for transformers and capacitors and industrial hazardous substances, including polychlorinated dibenzo-p-dioxins (PCDD) and dibenzofurans (PCDF).
Explanation:
Dichlorodiphenyltrichloroethane (DDT) is an organochlorine substance originally used as an insecticide, which became infamous due to its environmental impacts. In 1972, the US banned the use of DDT; however, there are countries that still use it as an insecticide for the control of mosquitoes in endemic malaria areas.
Coyotes and Wolves both live in North America. They share similar habitats
and feed on similar prey. However, coyote have adapted to live in urban
areas while wolves have not. Are these species ecological equivalents?
(Explain your decision with at least two sentences) *
Answer:Wolves are adept at hunting and killing deer, while the smaller coyotes are strong at seeking and eating fawns.
Explanation:
Could a desert form at 45°N latitude?
Answer: No, deserts are found at 30 degrees latitude
Explanation:
Most of the world's deserts are located near 30 degrees north latitude and 30 degrees south latitude, where the heated equatorial air begins to descend. ... As moist air passes over a mountain range, it expands and cools, precipitating most of its moisture as it rises.
Organisms that obtain nutrients by breaking down dead and decaying plants and animals are called *
1. autotrophs
2. producers
3. decomposers
4. omnivores
Answer:
decompose
Explanation:
Why do some flowers have so many pollen grains and ovules?
Answer:
The underlying as- sumption is that larger pollen grains contain more nutrients than smaller ones, at least those that store starch, and this allows their pollen tubes to grow through deep stigmas that can not be traversed by pollen tubes from small pollen grains. Pollen number and duration of stigma receptivity.
Explanation:
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List five cell organelles and describe their function.
Answer:
Ribosomes are tiny organelles that contain RNA and specific proteins within the cytoplasm. Within the cell, ribosomes are directly involved in the manufacture of proteins by using their RNA and amino acids.
This process involves decoding the information contained in the mRNA and using amino acids to produce the required proteins.
Mitochondria are some of the largest organelles within a cell.
Compared to some of the other organelles, mitochondria contain DNA which makes them semiautonomous. Mitochondria also contain a double-membrane with the inner membrane folding to form cristae.
Also known as the powerhouse, mitochondria play an important role in respiration where they generate ATP (adenosine triphosphate) from substrates in the presence of oxygen. Using their DNA, mitochondria are able to encode for some of the components they require to perform their functions.
The plasma membrane is the organelle that encapsulates the contents of the cell. Apart from encapsulating cell contents, the plasma membrane also plays a vital role in regulating the movement of substances in and out of the cell.
As such, it is actively involved in such both passive and active transportation to and from the cell. These processes also help maintain balance even when conditions outside the cell change.
The plasma membrane is made up of two layers of phospholipids (phospholipids bilayer).
Found in eukaryotic cells, Endoplasmic reticulum (ER) is the organelle that forms an interconnected network of flattened sacs (cisternae). Like some of the other organelles found in eukaryotes, ER is enclosed in a membrane. The ER is divided into two regions that vary in structure and function.
These include:
Smooth endoplasmic reticulum - The smooth ER is named so because it lacks a ribosome on its surface. As a result, it is more smooth in appearance as compared to the rough ER. It is involved in the synthesis of lipids (e.g. phospholipids) and carbohydrates that are used to build the cell membrane.
What is a major source of energy for cellular processes in both plants and animals
How is the proximal convoluted tubule different from the distal convoluted tubule?.
The proximal convoluted tubule different from the distal convoluted tubules in that;
The proximal convoluted tubule is longer and more convoluted while the distal convoluted tubule is shorter and less convoluted The proximal tubules are more eosinophilic than the distal tubules. What is proximal convoluted tubule?There are two types of tubule, proximal and distal convoluted tubules.
Proximal convulated tubule is a type of tubule that helps in the functioning of the kidneys.
It helps to absorp materials like glucose, salts, proteins and ions.
Therefore, The proximal convoluted tubule is longer while the distal convoluted tubule is shorter and less convoluted.
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Which action is an important part of a scientific methods
A. Teaching others
B. Making hypotheses
C. Traveling to distant places
D. Using calculators
Answer: the correct answer is b
Explanation: the reason being is the fact that it is an actually part of the scientific method. all of the steps are question, research, hypothesise, experiment, observation, conclusion, and communicate.
The action which is important part of a scientific method is traveling to distant places. Thus, option C is correct.
What are scientific methods?Scientific method is a method of accumulating knowledge which is characterized by the development of science since 17 th century.
Scientific method involves correct observation, hypothesis, and points what is observed and at last congnitive assumptions interprets the observation.
The main steps or basic steps in the process of scientific method are constructing observing the observation, asking questions, than form hypothesis, after that prediction is made, and testing of prediction is done.
Therefore, the action which is important part of a scientific method is traveling to distant places. Thus, option C is correct.
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The overall equation for the cellular respiration of glucose is:.
Answer:
Carbon dioxide + Water Glucose (sugar) + Oxygen
Explanation:
can also be written as CO2 + H2O C6H12O6 + 6O2
What is the principal enzyme involved in dna replication.
Answer:
DNA polymerase
Explanation: :)
The enzyme joins nucleotides to synthesize a new two strand of DNA. DNA replication is called proofreads because each new DNA molecule is made up.
Periodic table showing three rows. Row 1: boron (B), carbon (C), nitrogen (N), oxygen (P), fluorine (F), neon (Ne). Row 2: aluminum (Al), silicon (Si), phosphorus (P), sulfur (S), chlorine (cl), argon (Ar). Row 3: gallium (Ga), germanium (Ge), arsenic (As), selenium (Se), bromine (Br), krypton (Kr).
Which of the following elements has properties similar to S?
worth 60 points
Answer:
Oxygen and Selenium
Explanation:
Elements will have similar chemical properties if they have the same amount of valence electrons. Core electrons are not evaluated when comparing chemical properties.
Oxygen (O), Sulfur (S), and Selenium (Se) have 6 valence electrons each. They will have the similar chemical properties.
Which of the following is not a parenting style? A. Authoritarian B. Disorganized C. Authoritative D. Permissive Please select the best answer from the choices provided A B C D.
Answer:
B. Disorganized
Explanation:
Let's go through each one:
A: An Authoritarian is an overly strict parent.
B: Disorganized isn't a parenting style.
C: Authoritative is the middle between permissive and authoritarian.
D: Permissive is an overly nice and allowing parent.
Answer:
B. Disorganized
Explanation:
This is because if you look up the four types of parenting styles, this isn't listed in it.
Access to potable water is most heavily limited by _______. A. Money b. Precipitation c. Raw water supplies d. Climate Please select the best answer from the choices provided A B C D.
Access to potable water is most heavily limited by money.
The correct option is A, money.
What is potable water?
Potable water is the water that is safe for drinking purposes.
Water is very necessary for life, and clean and potable water is also important for good health.
Every person is not able to get clean water.
Poor people can not afford to get water all the time.
Thus, the correct option is A.
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I neeed help Starfish are invertebrates, which means they don't have which of the following body parts?
A. Mouth
B. Brain
C. Arms
D. Backbone
Answer:
D. backbone is the answer
3 A butterfly has a wingspan of 62 mm. Charlie is asked to draw the butterfly with a magnification of x 5. What should the wingspan be on Charlie's drawing?
domain.
a
Single-celled extremophiles that lack a nucleus would be classified in the
a. Eukarya
b. Bacteria
c. Archaea
Answer:
[C] Archaea
Explanation:
Single-Celled and lack a nucleus = prokaryotic organisms (that is, organisms whose cells lack a defined nucleus)
Most extremophiles are single-celled micro-organisms belonging to two domains of life – bacteria and archaea.
[RevyBreeze]
Describe the function of each organelle.
Vacuoles
Mitochondrion
Lysosomes
Cell membrane
Answer:
vacules- to hold waste prodcuts
mitochondrion- creates the chemical energy to power the cell's biochemical reactions
lysosomes- to break down excess or worn out parts of the cells
cell membrane- regulates what enters and exits the cell
a chemist takes a polysaccharide and turns it into many disaccharide. what reaction has the chemist performed and what must he add
Answer:
hydrolysis
Explanation:
Water must be added to break the bonds in a polysaccharide, in order to become disaccharides and eventually monosaccharides.
Polysaccharides are composed of long polymerics of the monomeric sugars joined by linkages. A polysaccharide can be converted into a disaccharide by adding water through hydrolysis.
What is hydrolysis?The hydrolysis reaction is the chemical reaction that involves the breaking of chemical bonds by adding water molecules. The water acts as a nucleophile that eliminates, substitutes, and performs another process to break the bonds.
The polysaccharides are made by linking the monomers of the sugar that can be converted into disaccharides by adding water to the reaction so that it breaks the linkages between the sugar molecules to produce two sugar molecule structures. The large molecules produce smaller molecules.
Therefore, polysaccharides can be converted into disaccharides by adding water.
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Stromatolites are single celled prokaryotic bacteria cells.
True
False
True. They were originally formed by the growth of layer upon layer of cyanobacteria, a single-celled photosynthesizing microbe that lives today in a wide range of environments ranging from the shallow shelf to lakes, rivers, and even soils. It is a prokaryote, with no nucleus.
why do people share there own experiences even if no one ever cares?
The partial pressure of oxygen in arterial blood is approximately:.
Answer:
between 75 mmHg and 100 mmHg
Explanation:
Which describes a fungus–plant root association?
a. an independent relationship
b. disease-fighting
c. symbiotic mutualism
d. a decomposing relationship
Answer: c. symbiotic mutualism
Explanation:
Mutualism is a symbiotic relationship in which both species benefit
Classify to the kingdom level an organism that has organ systems, lacks cell walls, and ingests food.
climbing roots are found in ?
Answer:
Betle or Piper Betle
Explanation:
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A doctor talks with a patient who broke her arm. Which model should the doctor use to describe the injury?
artist's drawing of an arm
2D model of the skeletal system
photograph of dissected pig
plastic bone
Answer:
2d model of the skeletal system
Explanation:
this way they can see where it is relevant to other bones
Which of the following is a particle with a positive electrical charge?
Protron
Electron
Positron
Neutron
Answer:
Protron
Explanation:
Every proton has a positive charge, every electron has no charge, and every neutron has no charge. There is no such thing as a positron. I hope i help! :)
What are the advantages and disadvantages of slash-and-burn agriculture
A zygote is related to a blastocyst by the process of meiosis. cleavage division. fertilization. ovulation.
Answer:
It is the location for egg fertilization.
Explanation:
Answer:
CLEAVAGE DIVISION
Explanation:
Its not ovulation. Hope this helped!
A cube has a volume of 343 cubic centimeters. The length, width, and
the height of the figure are equal. What are the cube's dimensions?
Photosynthesis is the process by which plants synthesizes.....
1.) Food
2.) Oxygen
3.) water
Answer:
2. o2
Explanation:
Answer:
food
Explanation:
Photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy.
in short it is a process by which plants synthesize FOOD