Answer:
Test a known bloodstain as a positive control and a blank (filter paper) as a negative control (see interpretation of results to determine a positive and negative result).
ANSWER ASAPP
Explain the movement of particles in each state of matter.
Answer:
Gas:
assumes the shape and volume of its container ; particles can move past one anothercompressible ; lots of free space between particlesflows easily ; particles can move past one anotherLiquid:
assumes the shape of the part of the container which it occupies ; particles can move/slide past one anothernot easily compressible ; little free space between particlesflows easily ; particles can move/slide past one anotherSolid:
retains a fixed volume and shape; rigid - particles locked into placenot easily compressible ; little free space between particlesdoes not flow easily ; rigid - particles cannot move/slide past one anotherParticles in a:
1. gas are well separated with no regular arrangement.
2. liquid are close together with no regular arrangement.
3. solid are tightly packed, usually in a regular pattern.
Particles in a:
1. gas vibrate and move freely at high speeds.
2.liquid vibrate, move about, and slide past each other.
3. solid vibrate (jiggle) but generally do not move from place to place
hope that this helps :)
Bacteria are surrounded by?
Answer:
Structurally, a typical bacterium usually consists of (1) a cytoplasmic membrane surrounded by a peptidoglycan cell wall and maybe an outer membrane, (2) a fluid cytoplasm containing a nuclear region (nucleoid) and numerous ribosomes; and (3) often various external structures such as a glycocalyx, flagella, and pili.
Explanation:
Select all possible answers: which of the following are
organelles?
a. centriole
b. ribosomes
c. mitochondria
d. cytoplasm
Answer:
B and c I think
Explanation:
Organelles in animal cells include the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, vesicles, and vacuoles. Ribosomes are organelles in eukaryotic cells.
PLS HELP A student has four snails, four sprigs of Elodea, eight test tubes of bromothymol blue, and two rooms (light and dark). The student wants to know what gases are produced by the snails and Elodea in light and dark conditions. Assuming the student only has time for one experiment, what setup will yield the most complete data? All test tubes contain bromothymol blue. Experiment 1: Light room with test tubes A to D. A contains 1 snail. B contains Elodea. C is empty. D contains 1 snail and Elodea. Dark room with test tubes E to H. E contains 1 snail. F contains Elodea. G is empty. H contains 1 snail and Elodea. Experiment 2: Light room with test tubes A to D. Each test tube contains 1 snail. Dark room with test tubes E to H. Each test tube contains Elodea. Experiment 3: Light room with test tubes A to D. Each test tube contains 1 snail and Elodea. Dark room with test tubes E to H. Each test tube is empty. Experiment 4: Light room with test tubes A to D. A contains 2 snails and Elodea. B contains 1 snail. C and D are empty. Dark room with test tubes E to H. E contains Elodea. F contains 1 snail and Elodea. G and H are empty. a. Experiment 1 b. Experiment 2 c. Experiment 3 d. Experiment 4
Answer:
Its A Experiment 1
Explanation:
Read the sentence.
The tracking party followed their prey to the river, but there they lost the trail, even though they had several bloodhounds with them.
What type of sentence is this?
Answer:
Run on sentence
Explanation: Too much commas no periods, Much appreciated if Brainliest thanks
Answer:
D: a compound-complex sentence
In which direction is friction applied?
Answer:
horizontally?????
What's the independent and the dependent variable ??
Answer:
ruler
Explanation:
ANSWER QUICK PLS!!
What part of a greenhouse is similar to the greenhouse gases in Earth's atmosphere?
- the plants
- the glass
- the soil
- the sunlight
After Gerry mows his lawn, he often puts the grass clippings into his flower garden. How will this affect his garden?
A. It will decrease the amount of carbon in the soil and decrease the amount of carbon dioxide released by decomposers.
B. It will increase the amount of carbon in the soil and decrease the amount of carbon dioxide released by decomposers.
C. It will decrease the amount of carbon in the soil and increase the amount of carbon dioxide released by decomposers.
D. It will increase the amount of carbon in the soil and increase the amount of carbon dioxide released by decomposers.
Answer:
D.
Explanation:
I don't really have an explanation for this but here is the answer!! <3
what helps plant cells divide and is located primarily in roots and fruits?
Answer:
The answer is cytokinin
Explanation:
Cytokinin is a plant hormone located in roots and fruits and it promotes cell division.
Black walnut trees produce a nontoxic chemical that becomes highly toxic when it is exposed to air or soil. How does this chemical help black walnut trees compete with plants growing nearby?
Answer:
By attracting herbivores to the other plants
Explanation:
Which amino acid is least likely to form hydrogen bonds?
Answer:
6 amino acids
Explanation:
6 amino acids (asparagine, glutamine, histidine, serine, threonine and tyrosine) have both hydrogen donor and acceptor atoms in their side chains.
Why do sea urchins have spines (spikes)
Answer:
they are used for protection, maneuvering, and to trap food for consumption
Explanation:The spikes of the sea urchin are used for protection, to move about, and to trap food particles that are floating around in the water.
Do autotrophs need to carry out cellular respiration? Why or why not?
Answer:
Yes, autotrophs need to carry out cellular respiration.
Explanation:
Autotrophs make their own food. ... Many autotrophs make food through the process of photosynthesis, in which light energy from the sun is changed to chemical energy that is stored in glucose. All organisms use cellular respiration to break down glucose, release its energy.
In a water molecule, shared electrons spend more time
around the oxygen atom than the hydrogen atoms. As a
result, the oxygen atom is
slightly negative.
• very negative.
slightly positive.
• very positive
which of the following are protective barriers that are part of the body's immune system
ANSWER FAST PLEASE According to Dalton’s theory, why are carbon and oxygen differ.ent elements?
According to the Dalton's theory, carbon and oxygen are different elements because they are made up of different atoms which have different numbers of proton and neutrons.
What is Dalton's theory?John Dalton proposed his modern theory of atoms in 1803. He discovered atom, which is the smallest unit of particle. This theory is also known as the atomic theory of matter.
In this theory, he stated that every single atom of an element, such as sodium, is same as the other atoms of the same element. He also stated that the atoms of one element differ from the atoms of other elements. This theory is mostly found to be true. For example: A sodium atom is different from a carbon atom.
However, his theory was found to be found as the atoms present in the elements are found to be divisible into even smaller particles like protons, neutrons, and electrons.
Learn more about elements here:
https://brainly.com/question/14347616
#SPJ2
what caused the movement of ocean currents?
Answer:
The heating up and cooling down of water. The winds also have effects
Explanation:
What element is always present in a nucleic acid but is never present in a carbohydrate or amino acid
Carbon Sulfur
Proteins Always Sometimes
Carbohydrates Always Never
Nucleic Acids Always Never
Lipids Always Never
How are plant and animal cells similar?
Answer:
both are eukaryotic cells
Answer:
they both are eukaryotic cells
they both contain membrane-bound organelles
both have mitochondria, vacuoles, cytoplasm, ribosomes, endoplasmic reticulum, and Golgi apparatus
how does the concentration of electrolytes in and outside a cell control the movement of water
Answer:
Maintaining an isotonic environment for the cell ensures that the cell does not shrink or swell due to water.
Explanation:
If the cell was in a hypotonic solution, water would rush in the cell causing it to burst, and if it was in a hypertonic solution it would cause water to move out of the cell, causing the cell to shrivel. It is important that the cell is always in a solution with an almost equal electrolyte solution inside the cell
What type of transport involves the movement of a substance from high to low concentration directly across the membrane? *
Answer:
Passive Transport
Explanation:
Diffusion is a type of passive transport. Diffusion through a permeable membrane moves a substance from an area of high concentration (extracellular fluid, in this case) down its concentration gradient (into the cytoplasm).
Coastal wetlands are ecologically important because they do all of which of the following a. reduce the impact of storms coming inland b. harbor a low level of biodiversity c. help to destroy nutrients d. provide important habitats for only terrestrial species e. repel large aquatic reptiles
Answer: The answer is e
Explanation:
Adult giraffes eat about 75 pounds of food in a day. On average, an area can provide 450 pounds of food per day for giraffes.
Based on this information only, what is the carrying capacity for adult giraffes in this area?
6
75
375
450
Answer: the carrying capacity for adult giraffes in this area is: 6.
Explanation: [ 450 pounds divided by 75 = 6. ]
Fun Fact - Giraffes can drink up to 10 gallons of water a day and spend 16-20 hours a day feeding, their favorite food is Acacia Leaves.
Adult giraffes eat 75 pounds of food in a day. On average, an area can provide 450 pounds of food per day for giraffes.
The carrying capacity for adult giraffes in this area are 6.
How the carrying capacity for giraffes in given area is determined?Adult giraffes eat = 75 pounds of food per dayArea provides = 450 pounds food per dayso, carrying capacity for giraffes in the area equals,
food provided by are per day\ food eater by giraffes in a day
=450\75
= 6.
Hereby, carrying capacity of giraffes in this area is measured.
To know more about carrying capacity :
https://brainly.com/question/11242862
#SPJ2
WILL MARK BRAINLIEST!!!1PLZ HELP!!!
Answer:
gamma rays, ultraviolet waves, microwaves
Explanation:
can anybody help me with this?
Answer:
presence of sugar means that the outside of the fruits is less dilute (more concentrated in sugar than water) than the inside of the fruits
in osmosis (diffusion of water molecules), water molecules have a net movement from a more dilute substance to a less dilute substance
sugar is the less dilute substance, so water is drawn out of the fruits and mixes with the sugar around them
the sugar dissolves in water, creating a sugar solution
this results in fruits with less water inside them, and surrounded by sugar solution
Hope this helps :)))
Answer:
the grass hopper lives on land the fish lives in water.
both can see
Explanation:
What kinds of things might scientist measure in a mine or well???
Answer:
In wells Scientist measure dissolved oxygen, or DO (pronounced dee-oh).
The kind of thing that might scientist measure in a mine or well is the amount of dissolved oxygen. It is also named DO.
What is the responsibility of Scientists?Scientists are widely responsible for conducting and communicating scientific works on the basis of their respect, integrity, fairness, transparency, and trustworthiness. They always considered the consequences of new knowledge and its application.
According to the context of this question, scientists perform their role for the betterment of society, reliability, and efficiency of human beings with full concentration.
The amount of dissolved oxygen delivers the significance of nutrients present in a well or mine. Scientists conduct and gather research perspectives in order to gain knowledge in a particular area.
Therefore, the kind of thing that might scientist measure in a mine or well is the amount of dissolved oxygen.
To learn more about Scientists, refer to the link:
https://brainly.com/question/507522
#SPJ2
Search...
Which of the following
structures allows glucose
molecules to move through
the process of facilitated
diffusion?
Answer:
what are the choices
Explanation:
Determine the averages of the runners
Answer:
Jaylyn Fly's average is 11
Suzy Swoosh's average is 10.9
Suhain Sprint's average is 10.4
Explanation:
When you need to find an average, you just need to add the numbers up and then divide by the total number of values you added.
A car drives 150 m to the east then backtracks 30 m to the west. Describe the mathematical operation you will use to determine the net movement of the car.
Answer:
Subtraction operation
The car's displacement is 120 m west
Explanation:
Given;
first motion of the car as 150 m east
second motion of the car as 30 m west
The mathematical operation that will be used to determine the net movement of the car is subtraction operation.
The net movement of the car is the car's displacement.
Displacement is given by;
D = final position - initial position
D = 30 m - 150 m
D = - 120 m
The negative sign is direction = west ward direction
Thus, the car's displacement = 120 m west