In a local park, several environmental changes are noted; crayfish eggs in the lake are fewer than normal. When tested, the water from the lake has an elevated level of aluminum. What addition to the lake is the most likely cause of these conditions?
A)
acid rain
B)
lead from batteries
C)
sulfur dioxide particulates from a near-by factory
D)
carbon monoxide from cars near-by
E)
increased ozone from sun exposure

Answers

Answer 1

Answer:

B) lead from batteries

Explanation:

I think this is right


Related Questions

identifying organisms and assigning names to them comprises the activity called________​

Answers

Answer:

Binomial naming system

Explanation:

To find - identifying organisms and assigning names to them comprises the activity called ?

Solution -

The answer is - Binomial naming system

Reason -

The binomial naming system is the system used to name species.

Each species is given a name that consists of two parts.

The first part is the Genus to which the species belongs and the second part is the species name.

Find the volume.
7 in
7 in
9 in

Answers

Answer:

441 in^3

hope this helps

have a good day :)

Explanation:

Answer:
441
Explanation:
multiply

formula to calculate marginal rate of substitution ​

Answers

Answer:

(MRSxy) = ∆Y/ ∆X

Explanation:

A man with type O blood and a woman with type AB blood get married. What is the probability that they will have a child with type O blood? Prove your answer with a Punnett square.

Answers

Answer: o% chance

Explanation:

What percentage of businesses are sole proprietorships?
Ob
25 percent
40 percent
75 percent
98 percent
Od

Answers

Answer:

73.1 percent=75 %

Explanation:

Sole proprietorships comprise the majority of all business forms. According to Census data, 73.1 percent of all businesses were sole proprietorships (20.3 million firms). 13.1 percent of all businesses were S corporations (3.65 million firms), and about 8 percent were partnerships (2.2 million firms

Stacy has two fruits one is scaly with a few buds and the other has a hairy structure. Which parts of the vegetable plant did she buy?

Answers

Answer:

So, the first part of Stacy's vegetable is definitely turbous stem. The other part must be root, because it has hairy structures. These hair-like structures have function in the absorption of water and minerals from the soil.

what is evolution?...​

Answers

Answer:

Evolution is an adjustment of the heritable attributes of natural populaces over progressive ages. These attributes are the outflows of qualities that are given from parent to posterity during generation. There are also three main types of evolution: divergent, convergent, and parallel evolution.

Explanation:

A group of researchers wants to determine the most effective antibiotic for killing the disease causing bacteria E. coli. They select 5 different antibiotics and determine how many cells were killed at the end of the experiment. The dependent variable in this experiment would be

Answers

Answer:

Number of cells killed at the end of the experiment

Explanation:

In research, the dependent variable is one whose value is dependent on another variable - a variable that is supplied by the researcher during the course of the experiment which is also known as the independent variable.

In this case, since the main objective of the research was to determine the most effective antibiotic against the E. coli, the variable that is supplied by the researcher (the independent variable) is, therefore, the different antibiotics while the variable whose value varies based on which of the antibiotics is introduced is the number of dead bacterial cells.

Therefore, the dependent variable is the number of cells killed by each antibiotic.

I NEED HELP ASAP
Describe a cause of aerosol (particulate matter) pollution; then briefly explain its effect on human health.

Answers

A major cause of aerosol pollution is the burning of fossil fuels, such as coal, oil, and natural gas for transportation, energy production, and industrial processes.

What is aerosol pollution?

Aerosol pollution is also known as particulate matter pollution. It refers to the presence of tiny solid and liquid particles which are known as particulate matter, in the air. These particles can come from a variety of sources, including vehicle exhaust, industrial processes, construction activities, wildfires, and dust storms.

Aerosol pollution can various harmful effects on human health, as the tiny particles can easily penetrate deep into the lungs and bloodstream when inhaled. Exposure to high levels of aerosol pollution has been linked to a range of health problems, including respiratory and cardiovascular diseases, cancer, and premature death.

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A (n) ... is a type of Chemical bond in which a strong mutual attraction forms between ions in opposite charge

Answers

Answer:

ionic bond

Explanation:

Explanation:

Ionic. bond is the the answer .

Why Mollusca lost segmentation?

Answers

The ancestors of the Mollusca phylum did not lose segmentation; they never developed it in the first place. Based on their evolutionary development, early species were able to survive without segmentation.

List and briefly describe the chemical sequence of events in the fight-or-flight response to a threatening situation from the binding of epinephrine at the receptor site to readiness for another situation.

Answers

Answer:

Binding taking place at the receptor site

G protein activates in the cell membrane

Conversion of GDP → GTP

Activation of adenylate cycles

Cyclic production of AMP → ADP

Initiation of the desired reaction in regard to the original message

Cyclic restoration of AMP → ATP

Explanation:

The description of the mechanism:

Right off the bat, epinephrine attaches to a molecule called a receptor (beta-adrenergic protein).

G protein, which is found on the inner side of the plasma membrane, is activated when epinephrine binds to it.

The GDP-carrying Alpha subunit of G protein is isolated during activation. After that, the GDP is translated to GTP.

Adenylate cyclase is then activated by GTP.

The only enzyme that can catalyze the transformation of ATP to CAMP is adenylate cyclase (Cyclic adenosine monophosphate). As a result, the CAMP molecule (secondary messenger) is produced.

CAMP stimulates protein kinase A, and the cycle repeats till the glycogen phosphorylase enzyme is triggered.

After that, the cyclic amp is brought back and restored.

In a eukaryotic cell in mitotic S-phase, a spontaneous DNA double-strand break occurred due to replication fork collapse. Genetic analysis indicates that the break was repaired by a non-crossover mechanism resulting in a stable genome. The DNA repair process responsible for this outcome was:

Answers

Answer: The DNA repair process was called recombination repair.

Explanation: A sister or homologous chromatide is used to generate recombination and be repaired in this sort of cases.

what the persentage chance that the offspring will be dwart plant yellow fruit

Answers

Answer:

Yellow fruit and dwarf vines are recessive traits in tomatoes. Red fruit and tall vines are dominant. Complete a Punnett square and answer the questions for a completely dominant red and tall plant crossed with a heterozygous red and dwarf plant.

naCI forms what when placed into water

Answers

Answer:

When salt is mixed with water, the salt dissolves because the covalent bonds of water are stronger than the ionic bonds in the salt molecules.

Explanation:

na+ plus cl- plus heat

salt stays the same but adds some heat

There are 434 trees in a 12 square meter area. What is the population density?

Answers

Answer:

36 1/6

Explanation:

434÷12=36 1/6

population density is number of trees in one square meter

g Cells called ________ influence development by controlling the fate of other cells in their local environment

Answers

Answer:

Neighboring Cells

Explanation:

Neighboring Cells are known to be the type of cells that influence development by controlling the fate of other cells in their local environment.

Typically Neighboring cells through the process often referred to as Induction simply influence the development of other cells nearby or in their local environment. This process of cell influence is either by direct cell-cell contact or through the release of practice chemical signals.

Hence, in this case, the correct answer is "Neighboring Cells."

Suppose we have one true-breeding strain of tomato that produces red fruit. Suppose we also have a true-breeding strain of tomato that produces yellow fruit. We KNOW that a single gene is responsible for fruit color, and that the red allele is dominant to the yellow allele. If you make an F2 cross, what proportion of those fruits would you expect to be yellow

Answers

Answer:

1/4 or 25%

Explanation:

Let us assume that the fruit color trait in the tomato is represented by R and r. The dominant color red would be represented by R while the recessive color yellow would r.

If a true-breeding red fruit tomato (RR) is crossed with a true-breeding yellow fruit tomato (rr), the F1 would be thus:

             RR    x    rr

          Rr   Rr   Rr   Rr

Since R is dominant over r, all the F1 offspring would produce red fruits with the genotype Rr.

At F2:

               Rr    x    Rr

           RR   Rr   Rr   rr

RR and Rr = red

rr = yellow

Hence, the proportion of the F2 offspring expected to be yellow would be 1/4 or 25%.

Which of the following species would have the greatest chance of going extinct?(1 point)

a species with a fast reproduction rate and lots of genetic variation living in a changing environment

a species with a fast reproduction rate and lots of genetic variation living in a stable environment

a species with a slow reproduction rate and very little genetic variation living in a changing environment

a species with a slow reproduction rate and very little genetic variation living in a stable environment

Answers

The species that would have the greatest chance of going extinct is the species with the slow reproduction rate and little genetic variation. Because they won’t reproduce as fast and then when they do reproduce they will be almost the exact same and will live in an environment that changes which would mean they would be able to change and adapt with it .

Extinction of the species refers to the death of the total species from the planet. The species with a slow reproduction rate and little hereditable variability habiting changing conditions will extinct first.

What factors influences the extinction rate?

Many biological factors affect the survival of the organism as they play the most crucial role in the life and death of the species. The organism's reproduction rate, genetic modification and variability affect the survival of the organism.

The species that have a high rate of reproduction and high genetic variation can survive and continue their lineage when the surrounding habitat or the environment is altered or modified as they have better traits and characters.

The species in a changing environment with slow reproducing capability and very less genetic modification and variation will reduce the survival and adaptation chances of the organism and are more likely to go extinct first compared to the other organisms.

Therefore, option c, slow reproduction and less genetic variation in the species will go extinct first.

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The atmosphere has become less polluted over time.
Please select the best answer from the choices provided

True or false

Answers

Answer:

False your answer is = False

False is the answer

How is a lake succession different from the succession of an open field?

Answers

Answer:

Lake Succession (Research suggests a different model: a lake may undergo hundreds of years with little succession, with brief episodes of rapid change.) 1.An open lake or pond experiences a drought of one or more decades and the water level falls.

Explanation:

About how long did it take to grow the last 20 cells?

Answers

The rate of cell growth is increasing,its takes about 20 hours to grow 10 ells ,but it only takes 2-3 hr to grow the last 20 cellsExtend your thinking: In living organisms, the cell cycle is closely regulated.

1. Place these events in the correct order to show
the cause-and-effect relationships that lead
to algae blooms.
a. decomposers that break down dead
algae take in oxygen for cellular
respiration
b. lack of oxygen causes fish and other
aquatic organisms to die
c. excess nutrients from fertilizer are
transported by rain to nearby bodies of
water
d. people overfertilize crops and lawns
e. algae overgrow, become overcrowded,
and die
f. excess nitrogen and phosphorus leads
to overgrowth of algae

Answers

The overgrowth of microscopic algae is an algal bloom. The correct order is people overfertilize, excess nutrients transported by rain to nearby water bodies, excess nitrogen and phosphorus leads to algal bloom, algae overgrow, become overcrowded, decomposers that break down dead algae take in oxygen for cellular respiration and finally lack of oxygen causes death of fish and other aquatic life.

What are algal bloom?

The overgrowth of microscopic algae or algae-like bacteria in fresh or salt, waters is referred to as algal bloom.

Depending on the type that cause it, an algal bloom may produce bad-smelling, foam, or a paint-like slick.

According to the given scenario, the correct order will be:

People overfertilize crops and lawns.Excess nutrients from fertilizer are transported by rain to nearby water bodies.Excess nitrogen and phosphorus leads to overgrowth of algaeAlgae overgrow, become overcrowded, and die.Decomposers that break down dead algae take in oxygen for cellular respiration.Lack of oxygen causes fish and other aquatic organisms to die.

Thus, this was the correct order of events to show the cause-and-effect relationships that leads to algal bloom.

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A biologist grows bacterial cultures to see if there is a relationship between time and growth rate. Here are the data. Which hypothesis test would you use to see if there a relationship between growth rates and time

Answers

Answer:

Direct relationship.

Explanation:

There is direct relationship between growth rates and time which means growth rate of organism increases with the passage of time. Direct relationship means if one increases the other automatically increases and if one decreases, the other also decreases. The growth of bacteria becomes double when more time passes and vice versa. After every 20 minutes, the population of bacteria becomes double.

A stem cell that has the potential to differentiate into any cell derived from either the endoderm, ectoderm, or mesoderm lineage or into extraembryonic tissues, such as the placenta, has the property of being:

Answers

Answer:

Totipotential.

Explanation:

There are different cell potencies. A totipotent cell is a stem cell that can divide itself and differentiate in any cell that the organism needs. That is to say, endodermal cells, ectodermal cells, mesodermal cells, or extra-embryonic tissues. As cells differentiate themselves, they can gradually lose their potential. The cell's category that follows is pluripotent cells. These are stem cells that can only differentiate into ectoderm cells, endoderm cells, or mesoderm cells. Then we have multipotent cells, which differentiate into tissue cells. The next category is oligopotent cells. They give a limited number of specific cells, and lastly unipotent cells, only differentiate in one type of cell.

Are there telomeres on both the leading and lagging strand of DNA?

Answers

Answer:

To prevent the loss of genes as chromosome ends wear down, the tips of eukaryotic chromosomes have specialized DNA “caps” called telomeres. The overhang at the leading strand end of the chromosome is actually generated by enzymes that cut away part of the DNA 1start superscript, 1, end superscript

Maintaining high global biodiversity is important to provide ecosystem services to humans. Describe one cultural ecosystem service provided by diverse ecosystems.

Answers

Answer:

Ecosystem services of provision or supply

Explanation:

Ecosystem services

When talking about ecosystem services, we are referring to the benefits that ecosystems provide us. There are four types of ecosystem services:  

Provision or supply:

These are the products obtained by nature to be used or consumed, directly or with previous processing. Among them, we might mention food, clear freshwater, fertile soils, geotic materials (such as salt), raw materials (that can be used for clothing, construction), renewable fuels, biochemical compounds, pharmacological/medicinal resources, among others. Provisioning service has an impact on the economy, as many of these products are used to commercialize.  

Regulation:

Refers to ecological processes that improve life. Among others, we might mention climate regulation, CO² absorption, water purification, air purification, erosion control, natural disaster avoidance such as flooding, soil fertility maintenance, waste recycling, pests/plagues control, etc.  

Cultural:

Refers to not the material benefits. Ecosystems also provide a recreational place or area to spend time, to learn, provide a spiritual/religious space, are a source of inspiration. Ecosystems are considered to be cultural patrimony. Ecosystems are the source of scientific knowledge.

Support:

Involves ecological processes needed for the production of the other three previously mentioned services. There are five different support services:

→ Soil formation

→ Photosynthesis

→ Primary production

→ Nutrients cycles

→ Water cycle

Under certain circumstances, regulation services can also be considered support services.

Support service affects human beings indirectly, or direct but causing an effect in a long-term period.  

What is one type of light that can be used for photosynthesis

Answers

Answer:

The majority of green light is useful in photosynthesis. The relative quantum efficiency curve (Photo 1) shows how efficiently plants use wavelengths between 300 and 800 nm. Green light is the least efficiently used color of light in the visible spectrum.

If a heterozygous type A (ABO blood type) male crossed with a type O female, what would be the phenotypic ratio of type A: type B: type AB: and type O in the offspring?

Answers

Answer:

2/4 A and 2/4 O

Explanation:

The Earth's core has an estimated temperature between

Answers

Answer:

5,700 to 6700

Explanation:

The temperature at the inner core's surface is estimated to be approximately 5,700 K (5,430 °C; 9,800 °F), which is about the temperature at the surface of the Sun.
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