What effect would an increase in duckweed have on a pond ecosystem ?
A. The duck population would decrease due to a lower food supply

B. The fish population would increase due to an increased food supply

C. The underwater plant population would decrease due to decreased sunlight

d. The algae population would increase due to higher levels of oxygen in the water.

Answers

Answer 1

Answer:

c

Explanation:

Answer 2

Answer:

B.

Explanation:


Related Questions

what is an antibodies , please don't use internet

Answers

Explanation:

Antibody

Drug class

Description

An antibody, also known as an immunoglobulin, is a large, Y-shaped protein used by the immune system to identify and neutralize foreign objects such as pathogenic bacteria and viruses. The antibody recognizes a unique molecule of the pathogen, called an antigen. 

Explanation:

An antibody is a protein produced by the body's immune system when it detects harmful substances, called antigens.

What was the first eon of the Precambrian?

Archean

Paleozoic

Hadean

Answers

Answer:

The Archean Eon was preceded by the Hadean Eon, an informal division of geologic time spanning from about 4.6 billion to 4 billion years ago and characterized by Earth's initial formation. Records of Earth's primitive atmosphere and oceans emerge in the earliest Archean (Eoarchean Era).

Answer:

the Hadean Eon

Explanation:

C
¿Cuál es la probabilidad (En porciento de que alguno de los ratones sea de color
blanco

Answers

Answer:

En un concurso la probabilidad de ganar el premio A es 0,5 la probabilidad de ganar el premio B es 0,15 mientras que la probabilidad de ganar los dos regalos es de 0,05. Calcula la probabilidad de no ganar ningún regalo.

which of the following would astronomers most likely measure in light-years distance between stars distance between the earth and the moon?

Answers

Answer:

Astronomical unit usually refers to that unit which represents the mean distance starting from the center of the earth to the center of the sun. The distance from the sun to all the planets and other astronomical bodies are represented in the astronomical unit. It is denoted by AU. This unit is mainly used by the Planetary scientists and the Astronomers, as it is helpful in understanding the relative distance between two objects in the solar system.

Explanation:

Answer:

distance between stars  

Explanation:

The distance between the Earth and the stars is enormous. As a result, larger units like light-years are useful for expressing these distances. When a star is eight light-years away from the Earth, the light from that star takes eight years to reach us. To put it another way, the light that we see today originated from that star eight years ago.  

The astronomical unit usually refers to the unit that indicates the average distance between the earth's center and the sun's center. The astronomical unit represents the distance between the sun and all of the planets and other celestial bodies. AU is the abbreviation for it. Planetary scientists and astronomers mostly utilize this unit because it aids in determining the relative distance between two objects in the solar system.

Learn more about light-years

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A place where two tectonic plates slide laterally past each other is called a_______ boundary and is often associated with _______ faults​

Answers

Explanation:

When two tectonic plates slide past each other, the place where they meet is a transform or lateral fault. The San Andreas Fault is one of the best examples of lateral plate motion

Two parents have eyebrows that are connected (unibrow). This describes their phenotype. The unibrow is a recessive trait. What is their genotype?

Answers

Their genotype would be heterozygous

Can the carrying capacity of an ecosystem change?​

Answers

Answer:

no the carrying capacity of an ecosystem can't change

it is literally impossible hope it helps you have a good day please mark me as brain list

Answer:

No carrying capacity of an ecosystem doesn't change.

Explanation:

Each organism that lives there will have a different carrying capacity, one that interacts with everything around it. If the climate changes and the resources a particular animal needs for food drop, for example, that change in carrying capacity for one species will affect other populations in the area.

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1.The ____________________________________is your first line of defense and its generally impermeable to bacteria and viruses. It also secretes antibacterial ________________________________.
2.  Any substance the body reacts against is called an_________________________________ and can be anything from unhealthy body cells, bacteria or viruses,  or poisonous substances called _____________________________.
3.  Antibiotics are effective against ____________________________infections, but have no effect on most _______________________________infections.
4. Skin, inflammation, stomach acid, and fever are all non-specific parts of the _________________________________immune system.
5. The _________________________immune system is also called "specific" and includes T cells and B cells.
6. The scientific word for ANY white blood cell is _____________________________.
7. The specific immune system has 2 main parts - _________________________________which involves fighting off pathogens in the fluids of the body and ____________________________where infected body cells are destroyed. 
8.  _______________________________are most involved in humoral and _________________________________are in charge of cell-mediated responses. 
9. The T-cell in charge of coordinating the entire immune response is ___________________________________while _________________________________destroys infected body cells. 
10. B-cells are in charge of _________________________________production. 
11. The lymphatic system is composed of tubes and 500-600 lymph __________________, which are full of lymphocytes and filter and clean body tissue fluid before putting it back into the bloodstream in the chest.

Answers

2. Antigen
Toxins
3. Some bacterial infections
Viral
4. Innate immune system
5. Adaptive
6. Leukocytes
7. Humoral response
Cell mediated response
8. B cells
T cells
9. Helper T cell
Cytotoxic T cell
10. Antibody production.

Sample 2 was taken from a nasal swab of a family member who has been having sinus infections. What course of antibiotics would you recommend?

Answers

Answer:

Amoxicillin

Explanation:

Amoxicillin (Amoxil) is a commonly prescribed antibiotic which can cure acute sinus infections. Amoxicillin-clavulanate (Augmentin) is often prescribed by the doctor for a bacterial sinus infection. Take antibiotics as long as your doctor has prescribed in order to get rid completely from the infection and in order to reduce the chances of infection up to zero. They may be taken from 3 to 28 days depending on the time of antibiotic for sinus infection.

17. To produce the same intensity and color of light, you can choose from a 60-watt incandescent bulb, a 17-watt compact fluorescent bulb, or a 10 watt LED bulbWhich is the most energy efficient?
a. The incandescent bulb.
b. The compact fluorescent FL) bulb.
c. The LED bulb

Answers

Answer:

10 watt LED bulb.

Explanation:

The most energy efficient is 10 watt LED bulb because it produces more light by consuming less amount of energy. If a substance is more efficient so it consumes less amount of energy for doing its work while on the other hand, less efficient substances uses high amount of energy for doing its work so that's why we can say that  10 watt LED bulb is more efficient its as compared to incandescent bulb and a 17-watt compact fluorescent bulb which uses high amount of energy.

What is affected by the electrical signal sent by the fourth structure of the reflex arc?(This will be the fifth structure in the arc.)

Answers

Answer:

The effector organ is affected by the fourth structure of the reflex arc.

Explanation:

When talking about the reflex arc, we refer to the sequence of events that occur for the body to react to an external stimulus.

In general terms, the peripheric nervous system receives information from a stimulus coming from the external environment. This information is sent to the central nervous system, where it is processed. From the CNS, another signal is sent as a response to the stimulus. This mechanism is known as the reflex arc.

Five elements compose the reflex arc, which are receptors, three types of neurons, and effectors.

There are three types of neurons involved in the mechanism:

• Afferent or sensorial neurons

• Interneurons

• Efferent or motor neurons

Action:

Ascending branch

The stimulus reaches the body and is received by the specialized sensory receptors. Information is received by these receptors and converted from stimuli energy (temperature, pressure, light, etc.) to action potential energy. Afferent neurons, placed in the dermis and epidermis, receive information from receptors, react and send the information to the central nervous system as nerve impulses.

Descending branch

Once the information reaches the central nervous system, it is processed by the interneurons that analyze it before sending a response. Interneurons manage many sensorial signals, evaluate and compare them, and send a motor response.

Efferent neurons receive information from the interneurons and are stimulated to carry these new signals from the central nervous system to the cells of the effector organs. The effector organ can be a muscle or a gland.

Finally, the target tissue responds to the stimulus as a contraction, if it is a muscle, or as hormones release if it is a gland.

Which of the following is TRUE about igneous rocks?

A. do not contain fossils
B. do not contain crystals
C. May contain layers​

Answers

Igneous rocks are formed in magma or lava.
1. When an ingenious rocks are formed in lava( magma but outside) there are called extrusive rock, they have no layers, plan by one color which is black and is smooth.
2.When an igneous rock is formed in magma( underground ) it’s Intrusive rock, they have sediments not layers, different color, and is not smooth. But rarely have fossils.
So the answer is A.

I hope this helped have a nice day

Macrophages are responsible for which functions?
Select all that apply.
initiating an immune response
alerting the body of foreign invasion
removing harmful substances
o providing oxygen to the body

Answers

Answer:

B.

Explanation:

Macrophages are specialized cells involved in the detection, phagocytosis and destruction of bacteria and other harmful organisms. In addition, they can also present antigens to T cells and initiate inflammation by releasing molecules (known as cytokines) that activate other cells.

Hope this helps :)

Answer:

A. initiating an immune response

B. alerting the body of foreign invasion

C. removing harmful substances

Explanation:

hope this helps!!


Which of the following is the best solution to meet energy demands while protecting the
environment? A. grow more corn to produce ethanol. B. build more nuclear power plants. C. find and
burn new sources of oil and coal. D. improve energy efficiency and reduce energy waste.

Answers

Answer:

a

Explanation:

When the heart is working inside the body, the job of the atria is to
A. Increase the blood pressure
B. Regulate the heartbeat
C. Suck blood from the incoming veins
D. Fill the Ventricles

Answers

Answer:

D. Fill the ventricles.

Explanation:

The medical definition is "an anatomical cavity or passage especially : a chamber of the heart that receives blood from the veins and forces it into a ventricle or ventricles."

Answer:

Hello There!!

Explanation:

The answer is D. Fill the Ventricles.

hope this helps,have a great day!!

~Pinky~

HELP MEEEE WILL GIVE BRAINLIEST

Answers

Answer:

3

Explanation:

now brainliest plsssssssssss

Explain why biodiversity is essential to the health of an ecosystem Think about the complex interactions in an ecosystem and how different types of organisms respond to stable or unstable conditions Include evidence of factors that affect biodiversity and scientific reasoning to support your explanation​

Answers

Answer:

Biodiversity is very essential to the health of an ecosystem.

Explanation:

Biodiversity is essential to the health of an ecosystem because biodiversity provides functioning ecosystems that provides oxygen, clean air, clean water, pollination of plants, pest control, wastewater treatment and many ecosystem services. The change of temperature of the environment greatly affect the organisms because the organisms needs specific environment for growth and development. Habitat change, climate change, invasive species, overexploitation, and pollution are the factors that affect biodiversity. These factors causes increase or decrease in the biodiversity of the ecosystem.

Which of the following organisms can have all of the energy it uses to move, grow, and survive traced back to radiant energy from the Sun?
a tree
a human
a flower
a bacterium
a fish

Answers

Answer:

a tree and a flower

Explanation:

Answer:

Ummmm, all of them?

Hope this helps!

Explanation:

PLZ HELP THIS IS DUE TODAY!!!

Why is figure 3 more helpful than figure 2?

Answers

Answer:

You are more easily able to see the correlation between the two values

Explanation:

Which of the following is most likely to cause the greatest decrease in the snake population?
Choose 1 answer:
A
A decrease in the mice population
B
A decrease in the hawk population
An increase in the grasshopper population
A decrease in the vulture population

Answers

Answer:

I believe the answer is A: a decrease in the mice population

Answer:

Maybe A

Explanation:

Because due to the fact that there is a shortage in mice might cause a decrease in snake population


.True or False: Most mutations are neutral; they have little or no effect.

Answers

The majority of mutations have neither negative nor positive effects on the organism in which they occur.

Answer:

true

Explanation:

the majority of mutations are neutral in their effects on the organisms in which they occur . beneficial mutations may become more common through natural selection. harmful mutations may cause genetic disorders or cancer :))

does anyone know how to mark someone Brainllest?

Answers

Answer:

it should say it on the answer box

Explanation:

Propose THREE environmental variables (two abiotic and one biotic) that could explain why millipedes are found more frequently under logs.

Answers

Answer:

1. Millipedes can find food easily under logs. 2. Millipedes can stay out of hot environments under a log. 3. Millipedes can stay away from predators under a log.

what makes water impure describe one way of removing soluble in impurities from water​

Answers

Process # 1. Removal of Suspended & Dissolved Impurities:

Removal of coarse, dispersed and colloidal impurities from water is known as clarification. These impurities may be removed either by filtration or by sedimentation.

which one ? A? B? C? D?

Answers

Answer:

b

Explanation:

maybe something else too but B for sure

Question : Define the term ,' Lava'.​

Answers

Answer:

Lava, according to Oxford Dictionary, is defined as

"hot molten or semifluid rock erupted from a volcano or fissure, or solid rock resulting from cooling of this."

Explanation:

I hope this helps!

Answer:

lava is a hot molten liquid of coal of fire which are erupted during volcano eruption.it occurs naturally which temperature is high no one afford its temperature. almost all got dry.

Which of the following statements concerning emotions is true?
A.
Chemical signals from the endocrine system can affect your mood.
B.
A lack of activity by the endocrine system will always make you anxious.
C.
The endocrine system cannot regulate emotion.
D.
Over activity of the endocrine system will always make you depressed.

Answers

Answer:

A. chemical signals from the endocrine system can affect your mood

why does water enter the paramecium
please answer asap !!!!

Answers

Answer:

As paramecium lives in fresh water, it has the problem of water being transported into it because of osmosis.

Explanation:

osmosis is the movement of any solvent through a selectively permeable membrane into an area of higher solute concentration, the result of which will be an equalizing of solute concentration on either side of the membrane.

Answer:

. Their cytoplasm contains a greater concentration of solutes than their surroundings and so they absorb water by osmosis

Explanation:

Paramecium and amoeba live in fresh water.The excess water is collected into a contractile vacuole which swells and finally expels water through an opening in the cell membrane.

Questions

Which of the following will occur if a plant
species is exposed to an environment that
exceeds its tolerance range?
Choose an answer
The species will change its tolerance
range.
The species will not be affected.
The species will be stressed.
The species will continue to thrive.

Answers

the species will be stressed

1. Explain the origin of the word biology.

Answers

The word biology comes from the Greek word bios, meaning life, and logos, meaning study.

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