Which experiment should be conducted as a field investigation?

Answers

Answer 1
Observing changes in the nesting behavior of wood ducks

Related Questions

How is water traveling underground to lost Lake?

Answers

Answer: Water becomes the part of the aquifer.

Explanation:

Water from rain, snow fall, river, lakes, ponds, ocean, irrigation field, and from other sources become the part of the ground water or aquifer. The water seep into the soil or rocks and deposited as reservoir of water underground. The underground water when exposed to the surface can become the part of the lost lake or any other water body. Thus the source of lost lake can be determined this way by tracking the distance covered by the ground water.

Can you please with this question?

Answers

Answer:

deletion

Explanation:

AAC GGC AAA CGA TTG ---> ACG GGC AA? CGA TTG

The bolded portion represents where the mutation occured.

As you can see the nitrogenous base adenine was completely removed from the codon

When a nitrogenous base gets removed it is known as a deletion mutation

Which of the following describes what happened to wetlands after agricultural expansion?
A: They were drained for irrigation.
B: They became polluted from mining.
C: They were converted to swampland.
D: They were used for railroad pathways.

Answers

The answer to this question is C

Natural selection is driven by which of these? *
A.Mutations
B.Genes
C.Population size
D,Selected pressures
NEED THIS QUICK

Answers

I think the answer is b
the answer will be B

Identify ALL of the functions of proteins. Structure and is found in tendons, bones, and ligaments. Communication and works as chemical messengers such as hormones. Defense as in antibodies. Transportation and are embedded in the cell membrane to allow substances to move across the cell membrane. Enzymes that lower the activation energy of a reaction. Contraction to allow muscle and cell contraction/movement. Eicosanoid such as in regulation of blood pressure or inflammation. Steroids such as cholesterol. Glycogen for energy storage in muscles.

Answers

Answer:

Structure and is found in tendons, bones, and ligaments.

Communication and works as chemical messengers such as hormones.

Defense as in antibodies.

Transportation and are embedded in the cell membrane to allow substances to move across the cell membrane.

Enzymes that lower the activation energy of a reaction.

Contraction to allow muscle and cell contraction/movement.

Explanation:

Proteins serve many functions in living organisms.

Structure: The most abundant protein in mammals is collagen and is found throughout the body. In a major component of connective tissue such as skin, ligaments, and tendons providing strength and elasticity to these tissues. It is found also mineralized in bones and teeth.

Proteins function as hormones which are chemical messengers that mediate many cellular responses in the body. For example, the hormone insulin is a protein.

Proteins functions in the body's immune system as antibodies which recognize and initiate immune responses against diseases. The immunoglobulin such as immunoglobulin A and G are proteins.

Proteins serves as transporters to move substances across the cell memebrane. Some are found as peripheral or integral membrane proteins. Examples of transport proteins are the glucose transporters, Glut-1, Glut-2 and Glut-4 transporters.

Enzymes are proteins which catalyse the chemical reactions tanking place in an organisms. Various enzymes in the body include the hydrolases, the ligands, the leases, etc.

Contraction of the actin filaments of the muscle which are proteins, allow muscle and cell contraction bringing about movement.

A Note on the other options.

Eicosanoids are lipid molecules which serve various functions such as in regulation of blood pressure or inflammation.

Steroids such as cholesterol are lipid-derived molecules.

Glycogen for energy storage in muscles is a storage form of glucose, a carbohydrate.

3. Which part of a flower devel-
ops into a fruit? into a seed?

Answers

Answer: ovary

Explanation:Once pollen gets to the ovary within the flower, the ovary develops into a fruit. The ovules inside the ovary develop into seeds inside of this fruit.

Explicaciónes el ovulo fencundado de la flor

Highly toxic chemicals that persist in the environment have been associated with disruption of the: immune system. reproductive system. nervous system. All of these are correct.

Answers

Answer:

All of these are correct.

Explanation:

Immune system, reproductive system and nervous system are adversely affected by the contact of highly toxic chemicals because toxic chemicals have materials which is harmful for the cells that the cause of cell death or damaged the structure of the cell due to which the cell can't perform its function efficiently. All the system i.e. Immune system, reproductive system and nervous system are made up of cells so if the cells are damaged by these toxic chemicals the body systems are also negatively affected.

Facilitated diffusion requires
A. a protein pump, energy, and a concentration gradient.

B. no energy, net osmotic movement, and a protein pump.

C. a concentration gradient, a protein channel, and no energy.

Answers

Answer:

A.

Explanation:

TutorialDiffusionDiffusion means that the net movement of particles (molecules) is from an area of high concentration to low concentration.

Graph of the simple and facilitated diffusion taking into account the rate of uptake and the concentration

If the particles can move through the lipid bilayer by simple diffusion, then there is no limit to the number that can fit through the membrane. The rate of diffusion increases linearly as we add more particles to one side of the membrane.

If the particles can only pass through protein channels, then the rate of diffusion is determined by the number of channels as well as the number of particles.

Once the channels operate at their maximal rate, a further increase in particle numbers no longer increases the apparent rate of diffusion. At this limited rate we describe the protein channel as being saturated.

The cartoon illustrates several points about facilitated diffusion. The particles are more concentrated on one side of the membrane, and yet they can move in both directions. However, the net movement is from high particle concentration to low. If the number of particles gets so high on one side of the membrane that they interfere with diffusion through the protein channel, then we observe a limit to the rate of diffusion at the point of saturation.

Illustration of facilitated diffusionanimation used with permission of the Virtual Cell Web PageProblem 7 | Answer | Problem 8The Biology Project > Cell Biology > Cell Membranes > Problem Set

The Biology ProjectDepartment of Biochemistry and Molecular BiophysicsUniversity of ArizonaMay 2002Revised: August 2004Contact the Development Team

Simple diffusion does not require energy: facilitated diffusion requires a source of ATP. Simple diffusion can only move material in the direction of a concentration gradient; facilitated diffusion moves materials with and against a concertion gradient.

Answer:

C. a concentration gradient, a protein channel, and no energy.

Explanation:

Facilitated diffusion requires a concentration gradient, a protein channel, and no energy.

Match each of the following terms with its definition. 1. Mitosisa) The dense, active protoplasm found in the center of the cell 2. Nucleusb) The watery fluid that surrounds the nucleus of the cell and is needed for growth, reproduction, and self-repair 3. Cytoplasm c) The process of cell reproduction of human tissues that occurs when the cell divides into two identical cells 4. Cell membrane d) The part of the cell that encloses the protoplasm and permits soluble substances to enter and leave the cell

Answers

Answer:

1. Mitosis c) The process of cell reproduction of human tissues that occurs when the cell divides into two identical cells

2. Nucleus a) The dense, active protoplasm found in the center of the cell

3. Cytoplasm b) The watery fluid that surrounds the nucleus of the cell and is needed for growth, reproduction, and self-repair

4. Cell membrane d) The part of the cell that encloses the protoplasm and permits soluble substances to enter and leave the cell

Explanation:

Mitosis is the process that undergoes a cell to give two new identical cells. This is how our body makes or renovates tissues.The nucleus is the part of the cell that contains the DNA, which is necessary to synthesize the proteins that the cell and our body need. It is in the center of the cell and has a nuclear membrane that separates it from the rest of the organelles.The cytoplasm is a solution that surrounds the nucleus, and it contains the rest of the organelles that the cell needs for its functions. The cell membrane is the structure that encloses all the cytoplasm and the nucleus. It is made of phospholipids, proteins, and cholesterol, which allows the passage of certain substances.

Explain the effect carbon has on climate​

Answers

Carbon dioxide is a greenhouse gas: a gas that absorbs and radiates heat. ... But increases in greenhouse gases have tipped the Earth's energy budget out of balance, trapping additional heat and raising Earth's average temperature. Carbon dioxide is the most important of Earth's long-lived greenhouse gases.

the increase to heart rate is a normal homeostatic response and allows for an adjustment of the body's set point during exercise. Identify one other response that your body makes to help maintain homeostasis for a "set point" that can't be adjusted & Describe why it does that. *

Answers

Answer:

it increases oxygen levels and decrease carbon dioxide levels

Help!!!

The burning fossil fuels has increased the carbon dioxide content of the atmosphere.What is the possible effect that the increased amount of carbon dioxide is likely to have on our planet?
A. A warmer climate
B. A cooler climate
C. Lower relative humidity
D. More ozone in the atmosphere​

Answers

A a warmer climate because of the carbon dioxide in the atmosphere.

Answer:

A warmer climate

Explanation:

will mark brainlist, help please!

Answers

Answer:

C

Explanation:

The selective serotonin uptake inhibitors, like the antidepressants Prozac, Zoloft, or Paxil, result in increased levels of serotonin at synapses, which may _____ initially but then lead to _____.

Answers

Answer:

increase anxiety; decreased vulnerability to overreact to stress

Explanation:

Serotonin (5-HT) is a natural neurotransmitter that carries signals between nerve cells (neurons) throughout the body. This neurotransmitter (serotonin) is responsible for regulating many biological functions (e.g., mood, digestion, sleep, etc). Moreover, it has been shown that there is an association between low cerebrospinal fluid 5-hydroxyindole-acetic acid (5-HIAA, the principal serotonin metabolite in the brain) levels and the risk of developing depression or destructive behaviors. In addition, serotonin concentration can also be elevated in situations of anxiety and/or stress. Antidepressants such as Prozac, Zoloft and Paxil act as serotonin uptake inhibitors that increase serotonin concentration at the synaptic site. Like other drugs, these antidepressants may lead to increase anxiety and decrease the vulnerability to react to stress by downregulating sensitivity to serotonin released during natural stress situations.

what is a waning moon

Answers

Answer:

A period where a new moon will go to a full moon

Explanation:

The phase lasts from the Third Quarter Moon's semicircle until it disappears from view at New Moon. Waning means that it's shrinking and getting smaller, while crescent refers to the curved sickle shape.

Which of the following is a subatomic particle located inside the nucleus of
an atom?
o
A. Electron
o
B. Neutron
C. lon
D. Positron

Answers

The answer is :

B. Neutron

En un tanque de agua se sumerge un diapasón que vibra con una frecuencia de 600Hz. Las ondas sonoras resultantes en el agua tienen una longitud de onda de 2,5m. ¿Cuál es la velocidad del sonido en el agua?

Answers

Answer:

1500 ms-1

Explanation:

La velocidad de una onda se obtiene de;

Velocidad de onda = frecuencia * longitud de onda

Cuándo;

Frecuencia = 600 Hz

Longitud de onda = 2,5 m

Luego se deduce que la velocidad del sonido en el agua = 600 Hz * 2,5 m = 1500 ms-1

Methods farmers use to increase crop production from their land

Answers

Explanation:

Consider these 9 tips, techniques, and methods regarding how to increase your corn crop yield

Plant Early, Plant Effectively. ...

Practice Seasonal Soil Rotation. ...

Know The Yield Potential. ...

Always Scout Your Fields. ...

Ensure Proper Water Drainage. ...

Utilize Fertilizers. ...

Test Your Soil. ...

Weed Early and Often.

In a lever, 120 N load is attached at a distance of 20 cm from the fulcrum. If this effort is used to lift 50 kg weight then, the load distance is:!?​

Answers

Answer:

The load distance is 4.9 cm

Explanation:

Given;

Effort applied to the lever, E = 120 N

Load overcame by the effort, L = 50 kg = 50 x 9.8 = 490 N

distance of the effort from the fulcrum, e = 20 cm

let the distance of the load from the fulcrum = d

The following simple set-up is used to illustrate this lever;

  -----------------------------Δ-------------------------------

 ↓          20cm                             d                   ↓

120 N                                                                490 N

Lever operates on the principle of moment, so take moment about the pivot (fulcrum);

490(d) = 120(20)

d = (120 x 20) / (490)

d = 4.9 cm

Therefore, the load distance is 4.9 cm

PLEASE HELP!! ANSWER THE BIOLOGY QUESTION!!!

Answers

answer is H, this for proof and males (XY) females (XX) good luck :)

Answer:

option c

Explanation:

The genes that can give you red-green color blindness are passed down on the X chromosome. Since it's passed down on the X chromosome, red-green color blindness is more common in men. This is because: Males have only 1 X chromosome, from their mother.

Where does an avocado plant get carbon atoms to make proteins? *

Air
Water
Soil
Sunlight

Answers

Answer:

i believe it is A: air because carbon comes from air so if they take in the air to maike it they are also taking in carbon

Explanation:

Kdkdkslslslsosoxosososowowowo air

What kind of cells does mitosis make?
Choose THREE.

Answers

Answer:

Mitosis is used to produce daughter cells that are genetically identical to the parent cells. The cell copies - or 'replicates' - its chromosomes, and then splits the copied chromosomes equally to make sure that each daughter cell has a full set.

Explanation:

Why are protein so fragile

Answers

Levels of selective constraint vary among proteins. Although strong constraint on a protein is often attributed to its functional importance, evolutionary rate may also be limited if a protein is fragile, such that a large proportion of amino acid replacements reduce its fitness. To determine the relative contributions of essentiality and fragility to selective constraint, we compared relationships of selection against nonsense mutations (snon) and selection against missense mutations (smis) to protein sequence conservation (Ka).

3.
If a hawk eats 30% of the weasel population, weasels eat 30% of the mouse population, and
mice eat 20% of the wheat plants, calculate the total numbers of each organism that exist in
this ecosystem
a. Start by finding how many weasels there are to support the one hawk
i. # of weasels eaten 7.3 = total weasels
ii. total weasels x # of mice needed / .3 = total mice
iii. total mice x # of wheat plants needed / .2 = total wheat plants

Answers

Answer:

a. Approximately 1,003 weasels, 3,345 mice and 16,729 wheat plants per one hawk are in the ecosystem

Explanation:

The percentage of the weasel population eaten by a hawk = 30%

The percentage of the mouse population eaten by a weasel = 30%

The percentage of the wheat plants population eaten by a mice = 20%

a. One hawk needs 330 kJ of energy per day, which gives 330 kJ × 365 = 120,450 kJ per year

Let 'x' represent the number of weasels to support one hawk, we have;

0.3 × x = 120,450 kJ/year/(400 kJ) = 301.125

x = 301.125/0.3 = 1,003.75

The number of weasels required to support one hawk per year ≈ 1,003 weasels

The total weasels ≈ 1,003

ii) The number of mice needed, y = x/0.3 = 1,003.75/0.3 = 3,345.8[tex]\overline 3[/tex]

The total mice, y ≈ 3,345 mice

iii) The number of wheat flower needed, z = y/0.2

∴ The number of wheat flower needed, z = 3,345.8[tex]\overline 3[/tex]/0.2 ≈ 16,729.1[tex]\overline 6[/tex]

The total wheat plants ≈ 16,729.


Much of our world is made up of plants, soil, and water. What do you think is important about these three things? How do they
interrelate?

Answers

Answer:

si  s plantas no lrspiermo xsdaa

Explanation:

Select the correct answer. Which form of birth control could people use without altering hormonal systems or blocking sperm from fertilizing an egg

Answers

Answer:

Fertility awareness

Explanation:

Fertility awareness involves the woman being observant about different pointers during her menstrual cycle. This method is not the safest.

Studies have shown that a woman is less likely to get pregnant few days after completing her menstruation but very fertile around 12-14 days before her next period comes up.

This form of birth control doesn’t involve altering hormonal systems or blocking sperm from fertilizing an egg

how many legs does a baby mouse have ease i need help​

Answers

Answer:

Mice have four legs, four feet and one tail per unit-mouse.

Answer:

yes of course mouse have four leg

What is the importance of organizing organism?

Answers

Answer:

It is necessary to classify organisms because It helps in the identification of living organisms as well as in understanding the diversity of living organisms. Classification helps us to learn about different kinds of plants and animals, their features, similarities and differences

2.Which of the following is the appropriate time for pruning fruit trees?
a. winter and summer
b. every other year
c. fall and spring
d. throughout the year

Answers

the answer is c hope that helped

Answer:

I believe it's C

How do barnacles eat? Do you think barnacles are able to eat when out of water? Why?

Answers

Answer:

When the tide goes out, the barnacle closes shop to conserve moisture. As the tide comes in, a muscle opens up these four plates, and the feathery legs of the barnacle sift the water for food.

please follow me and mark me as brainlist

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