DDT is a pesticide that has been used worldwide over the past 50 years. DDT is used to prevent insects from destroying crops and as an insecticide used to kill disease-carrying insects. In 1972, the U.S. Environmental Protection Agency (EPA) began monitoring DDT usage. They conducted studies that analyzed ice layers from existing glaciers and these studies revealed that DDT was at its highest recorded levels 10 years after it was banned from being used. Which statement best describes why environmental monitoring for DDT was performed? Group of answer choices
A. To evaluate in what ways DDT impacts an ecosystem
B. To determine if DDT would cause serious harm to human populations
C. To predict if all chemicals are harmful to local pollinator insect populations
D. To ensure all chemicals are banned as soon as possible to protect public health

Answers

Answer 1

Answer:

I think B or C but mainly C

Explanation:


Related Questions

Define organic evolution​

Answers

Answer:

Organic evolution is the theory that more recent types of plants and animals have their origins in other pre-existing forms and that the distinguishable differences between ancestors and descendents are due to modifications in successive generations.

Explanation:

Answer:

Organic evolution is the theory that more recent types of plants and animals have their origins in other pre-existing forms and that the distinguishable differences between ancestors and descendents are due to modifications in successive generations.

Explanation:

What is an example of organic evolution?  of Organic evolution produces genetic modifications in a species or inside a cluster of species with time. Examples of this phenomena are Evidence of missing links in Archaeopteryx, wings of birds and insects – analogous organs.

Which of the following does not describe hormones in the body? I’ll mark the correct answer a brainliest

A. they are mediator molecules released in one part of the body but regulating the activity of cells in other parts of the body

B. most hormones enter interstitial fluid and then the bloodstream

C. hormones acts on muscles and glands only

D. hormones exert their effects by binding to receptors on or in the "target" cells

Answers

I think its C. hormones act on muscles and glands only. Because hormones act on cells, tissues, organs etc. So this is incorrect and the rest of them are correct.

Which layer is between the mesosphere and the inner core? (7 points)

a
Asthenosphere

b
Crust

c
Lithosphere

d
Outer Core

Answers

Answer:

i think its otter core im not sure

Explanation:

doing the test rn i will be back and say if its wrong or not

Answer:outer core

Explanation:

NEED HELP WITH HOMEWORK!!!
The mutation that causes sickle cell is:
1. deletion
2. Addition
3. substitution
4.Unpoint

Answers

Sickle cell disease is caused by a mutation in the hemoglobin-Beta Gene found in a chromosome 11. Hemoglobin transports oxygen from the lungs to other parts of the body. Red blood cells with normal hemoglobin (hemoglobin A) are smooth and round and glide through blood vessels.

help please i beg i don’t know

Answers

Answer:B, D

Explanation:

When the roller coaster starts flying down the hill, it gains kinetic energy and loses potential energy.

What do cells do with the products produced by cellular respiration?
A.
Carbon dioxide and water can be excreted and the energy is used by the cell.
B.
Glucose and carbon dioxide can be excreted and the energy is used by the cell.
C.
Carbon dioxide and oxygen can be excreted and the energy is used by the cell.
D.
Glucose and oxygen can be excreted and the energy is used by the cell.

Answers

Answer:

Ok

Explanation:

I believe the answer is D

Answer:

A

Explanation:

Carbon dioxide and water can be excreted and the energy is used by the cell

Energy conversion in which sunlight, water and carbon dioxide is converted into oxygen
and glucose.

Answers

Answer:

Photosynthesis

Explanation:

2. The researchers in the film spent a month collecting and identifying various species of animals and plants. These species were then added to a database of all species in Gorongosa. Provide two (2) reasons why building a species database will be useful for the restoration project.

Answers

Answer:

Importance of building specie database, for restoration projects.

Explanation:

Restoration implies human intervention, for renewing - degraded ecosystems & habitats.

Building species data base is important for this, as - wildlife is an integral part of habitat. Understanding their favourable living ambience in ecosystem - like temperature, humidity, sunlight & water access and migration patterns is important - in effort to restore environment in real sense.

What would a doctor most likely observe in a patient with a disease affecting the muscular system? ​

Answers

Answer:

I would say difficulty standing or lifting objects.

Explanation:

To see if muscles are intact.

A student is asked to design an investigation which will cause an object to have motion that matches the graph she was given.
Which of the following investigations would yield results which match the graph? (DOK 3, AKS 8a)
O A The student will push a ball up a ramp and allow it to roll back down.
OB. The student will push a ball on a smooth, flat surface and then on a rough surface.
OC. The student will push a ball on a smooth, flat surface, it rolls at a constant speed for a short time and then down a rough hill.
D. The student will release a ball down a smooth hill, it rolls at a constant speed for a short time, and then rolls onto a rough surface.

Answers

The answer is A. The answer's A because the ball is still in motion.

What does the diagram represent

Answers

Answer:

I wanna say C but im not sure.

Explanation:

What brain structures regulate events in the ovaries and uterus?

Answers

Answer:

The Pituitary and Ovarian Hormones Control the Ovarian Cycle

Explanation:

FSH and LH stimulate ovarian follicles to grow. As the follicles grow, they begin to secrete estrogen. During this phase of the cycle, the increasing levels of estrogen feed back on the pituitary to inhibit the release of additional FSH and LH.

es and Moion Assessment (Luncn)
12of25
While waiting for the bus you take a seat on the metal bench at the bus stop. The bench feels very cold to you. Why? (AKS 7c DOK 2)
A The warmth in your hands is being transferred to the bench via conduction.
OB. The warmth in your hands is being transferred to the bench via convection.
Oc. The coldness of the bench is being transferred to your hands via conduction.
OD. The coldness of the bench is being transferred to your hands via convection.

Answers

B the warmth from your hands us being transferred

Answer:

C the answer is def c

Explanation:

Please help. What safeguards are in place to protect Americans from unsafe food? Are these methods science-based?

Answers

Answer: The FDA and USDA cerate food safety programs, safeguards to protect Americans, to protect people from unsafe food. The FDA has monitoring programs for pathogens, naturaltoxins, pesticides, etc.; their methods are science-based.

The safeguards that are placed to protect Americans from unsafe food are FDA and USDA. FDA means food and drug administrator and USDA means U.S. department of agriculture.

What are FDA and USDA?

FDA stands for food and drug administrator. It is a health and food department to ensure public health and to check the food items that the citizens are consuming.

USDA stands for The United States Department of Agriculture. The department is responsible for making the laws regarding food quality, and they also develop new qualities of fruits and vegetables.

These departments are based on scientific research and methods. Many scientists work under this to save people from having bad food.

Thus, The FDA and USDA are the safeguards set up to protect Americans from tainted food.

To learn more about FDA and USDA, refer to the below link:

https://brainly.com/question/21469257

#SPJ2

Long legs (L) in racing horses is dominant to short legs (l). Good muscle tone (G) is dominant to weak muscle tone (g). Determine the phenotypes of the F1 generation resulting from a cross between a heterozygous long legged, weak muscled horse and a heterozygous long legged, strong horse

Answers

Answer:

See the answer below

Explanation:

Long leg (L) is dominant over short leg (l) and Good muscles (G) is dominant over weak muscles (g).

Heterozygous long leg, weak muscle = Llgg

Heterozygous long leg, strong muscle = LlGg

       Llgg    x    LlGg

Offspring:

2 LLGg - Long leg, strong muscle

4 LlGg -  Long leg, strong muscle

2 LLgg - Long leg, weak muscle

4 Llgg - long leg, weak muscle

2 llGg - short leg, strong muscle

2 llgg - short leg, weak muscle

Ratio of offspring with long leg and strong muscle = 6/16 or 3/8

Ratio of offspring with long leg and weak muscle = 6/16 or 3/8

Ratio of offspring with short leg and strong muscle = 2/16 or 1/8

Ratio of offspring with short leg and weak muscle = 2/16 or 1/8

The F1 generation resulting from a cross between a heterozygous long-legged, weak muscled horse and a heterozygous long-legged, strong horse

3/8- long leg and good muscle tone3/8- long leg and good muscle tone3/8- long leg and weak muscle tone3/8- long leg and good muscle tone3/8- long leg and weak muscle tone1/-8- shirt leg and good muscle tone3/8- long leg and good muscle tone3/8- long leg and weak muscle tone1/-8- shirt leg and good muscle tone1/8- short leg and weak muscle tone

Given:Long legs (L) in racing horses is dominant to short legs (l)Good muscle tone (G) is dominant to weak muscle tone (g)Cross:a heterozygous long-legged, weak muscled horse - Llgga heterozygous long-legged, strong horse - LlGg

Llgg X LlGg

Gametes:

Lg, lg and LG, LG, lG, lg

Punnett square:

attached as image

F1- phenotypes:

3/8- long leg and good muscle tone

3/8- long leg and weak muscle tone 1/-8- shirt leg and good muscle tone 1/8- short leg and weak muscle tone

Learn more about dominant trait:

brainly.com/question/2114747

True or False: An element is a substance that is made up of one type of atom.

Answers

Answer: true : A pure substance is something that occurs in nature. An element is made up of one type of atom only and cannot be split further. A compound has the combined properties of the elements from which it is made. Atoms show the macro properties of an element.

Explanation:

It is true .

Have a nice day.

The bullfrog, Rana catesbeiana, is most closely related to

Answers

Answer: It is most related to a spotted chorus frog

I hope this helps, and Happy Holidays! :)

Answer:

The bullfrog, Rana catesbeiana, is most closely related to the spotted chorus frog, Pseudacris clarki Asian flying frog, Polypedates leucomystax.

Cell walls in plants provide_______
1) Water storage
2) Control of cell function
3) Structural support

Answers

Answer:

3.

Explanation:

Plant cell walls primarily provide mechanical support for cells and collectively form the skeleton of the plant.

Answer:

the answer is choice 3

Explanation:

hoped I helped

In pea plants the allele for tall plants in dominant to the allele for short plants, and the allele for purple flower colour is dominant to the allele for white flower colour. What is the genotype of a short plant produced from a cross between a true-breeding purple flowered pea plant and a true-breeding white flowered pea plant? *
1.TTPP
2.ttpp
3.ttPP
4.ttPp
5.TtPp

Answers

Answer:

The correct answer is - 4. ttPp

Explanation:

Given - tall is dominant over short pea plant

let assume T is dominant and t is short which is recessive

Similarly, P for dominant purple flower and p for white flower

The offspring has a short plant which means it has both t allele or recessive allele for the height of a plant by the cross of a true-breeding purple and true-breeding white:

    P   P

p   Pp Pp

p   Pp Pp

This means the offspring would have a heterozygous case for the genotype of the flower of the pea plant

Thus, the correct answer is ttPp

Can someone please help me out I’ll give the brainliest!!

Answers

Answer:

its Bo

Explanation:

but it is possible to have both

Answer:

BO

explanation:

It all depends on the mothers type but its most possible that its BO

If your oxygen levels are too low, your respiration rate would _________.
increase or decrease

Answers

your respiration rate would increase

Name any four animals which take careof their babies​

Answers

Answer:

Peguins, Elephants, Orangutans, Octopi

Explanation:

Hope this helps :)

-Octopi litterally starve themselves for their children when nesscary it's cute-

-For the first full month of life, baby orangutans never let go of their mother-

-All the female adults in a elephant herd take turns watching the baby-

-Dad emperor peguins take care of their children for two months while the momma is out at sea replenshing herself, in both egg and baby form-

LOTS OF POINTS!?!?!The first part is just the dissolving of the carbon dioxide and water from groundwater, cloud, or rain making Type Here(H2CO3). FILL IN THE TYPE HERE PART!?!?!?

Answers

what’s the question and what part ?
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