Answer:
Simple Diffusion across the Cell (Plasma) Membrane. The structure of the lipid bilayer allows small, uncharged substances such as oxygen and carbon dioxide, and hydrophobic molecules such as lipids, to pass through the cell membrane, down their concentration gradient, by simple diffusion.
Explanation:
A bird population nested along the banks of a river and fed off fish. After new homes were built along the river, the bird population declined. A change to which limiting factor was most likely responsible?
space
water
weather
sunlight
Why do most people think mutations are dangerous?"
You are working in a lab trying to identify a new organism. It looks like a plant, but it could be a fungus. Which of the following tests would NOT be useful in determining which it is?
A. Testing to see if part of the organism grows underground
B. Testing it for Chloroplasts
C. Testing it to see if it absorbs food from the soil
D. Testing it for Chitin
Testing to see if part of the organism grows underground would not be useful in determining whether it is a plant or a fungus.
How other tests would help in determining the organism?Testing it for chloroplastsPlant and green algal cells have a structure called a chloroplast, which is where photosynthesis takes place.A plastid is a sort of body that is formed like a disk, an oval, or a circle and is used to synthesize and store food. Chloroplasts are one type of plastids. The green color of chloroplasts sets them apart from other types of plastids.If the given organism shows a positive test for chloroplast then it is a plant otherwise fungus.Testing to see if it absorbs food from the soilAlmost the majority of the water and nutrients consumed by terrestrial plants are taken up by their roots from the soil.Therefore if the given organism absorbs nutrients from the soil then it is a plant.Testing it for ChitinMost fungi, contain chitin. Alpha-chitin makes up the majority of these fungi's cell walls.If the given organism shows a positive test for chitin then it is a fungus.
Learn more about the test for plants and fungi here:
https://brainly.com/question/13910047
#SPJ2
Match the columns:
1. attaches bones to bones and muscles to bones
2. insulates against heat loss
3. forms the fibrous joint capsule
4. makes up the intervertebral discs
5. composes basement membranes; a soft packaging tissue with a jellylike matrix
6. forms the larynx, the costal cartilages of the ribs, and the embryonic skeleton
7. provides a flexible framework for the external ear
8. provides levers for muscles to act on
9. forms the walls of large arteries
Key
a. adipose connective tissue
b. areolar connective tissue
c. dense irregular connective tissue
d. dense regular connective tissue
e. elastic cartilage
f. elastic connective tissue
g. fibrocartilage
h. hyaline cartilage
i. osseous tissue
Answer:
I have matched them below
Explanation:
each of the columns have been properly matched below:
1. attaches bones to bones and muscles to bones = d. dense regular connective tissue
2. insulates against heat loss = a. adipose connective tissue
3. forms the fibrous joint capsule =
c. dense irregular connective tissue
4. makes up the intervertebral discs = g. fibrocartilage
5. composes basement membranes; a soft packaging tissue with a jellylike matrix = b. areolar connective tissue
6. forms the larynx, the costal cartilages of the ribs, and the embryonic skeleton = h. hyaline cartilage
7. provides a flexible framework for the external ear = e. elastic cartilage
8. provides levers for muscles to act on = i. osseous tissue
9. forms the walls of large arteries = elastic connective tissue
1. Identify the layer of the atmosphere that is constantly being hit by photons, has very low pressure, and temperatures that decrease from 120° Celsius to -80° Celsius as you move down through the layer.
Answer:
Mesosphere
Explanation:
The Mesosphere is a layer of the atmosphere that is above the Stratosphere and below the Thermosphere. This is the third layer of the atmosphere. Some of its characteristics include;
1. It is constantly being hit by photons: These photons are in the form of meteors that constantly hit this layer of the atmosphere. Meteors which are particles of dust release light energy that makes them visible to the human eyes as shooting stars.
2. The layer is characterized by very low pressure. This makes the air here thin and as the altitude increases, the air becomes very cold.
3. Temperatures decrease from 120° Celsius to -80° Celsius as you move down through the layer: The temperature in this layer decreases as the altitude increases.
The Siamese cat breed has a light colored body and dark colored head, tail, and feet, all of which are called points. The Burmese cat breed has a dark colored body and points that are almost the same color as the body. Crossing Siamese with Burmese can produce the Tonkinese cat breed, which has coat and point color that is intermediate to the Siamese and Burmese parents.
In all three breeds, a temperature sensitive enzyme is responsible for the dark coloration of the points. However, it is active only at the extremes of the body where it is coolest. Select the statements that are true regarding the evidence of incomplete dominance and incomplete penetrance in these breeds.
a. Intermediate coat color in Tonkinese demonstrates incomplete dominance.
b. Development of points in Tonkinese demonstrates incomplete penetrance.
c. Light coat color in Siamese demonstrates incomplete penetrance.
d. Darker color at the extremes of the body in Tonkinese demonstrates incomplete dominance.
Answer:
Correct answer is A and B.
Explanation:
Because the Tonkinese breed has a coat that is intermediate to the coat color of the Siamese and Burmese, we can say that this demonstrates incomplete dominance which means that the dominant allele does not have the ability to completely mute the recessive allele in the phenotype.
This is also true because of the development points on the coat of the Tonkinese breed.
So the correct answer is A and B.
I hope this answer helps.
how are babies produced specifically?
Answer:
Babies are made when special cells called sperm (produced by men) combine with cells called eggs (produced by women) in a process called conception. Each of these cells is produced by a process called meiosis which makes cells containing half the information of the parent.
plz mark brainliest
Answer:
when a dude's swimmers hit up a lady's egg a baby forms inside of the girl and 9 months later it comes out the same way it came in
Explanation:
Imao
Question 16 (1 point)
Which solution will have the highest concentration?
a: Mix 4 ml solvent with 21 mL solute.
b: Mix 4 mL solute with 21 mL solvent.
c: Mix 10 mL solute with 10 mL solvent
3. How many times can the nuclear DNA replicate during the life cycle of a cell? *
Always
Only once
Twice
Many times
plants need carbon dioxide to survive, plants get this gas from ________, which is something all living things (organisms) need.
Answer:
the air
Explanation:
If a person's blood pressure is too high or too low, how might the other organ systems in their body be affected?
Answer:
When blood pressure is too high, organs and blood vessels can be damaged. High blood pressure can even cause rupture of a blood vessel and lead to bleeding or other complications. When blood pressure is too low, not enough blood reaches all parts of the body.
Explanation:
Someone help!!! Plz plz
The ability of water to act as a solvent for so many substances is due to its _______.
Answer:
The ability of water to act as a solvent for so many substances is due to its structure, it can dissolve many ionic and polar molecules
Explanation:
polar nature Water's tendency to share electrons unequally makes it a polar molecule. The slight charge on either side of the water molecule allows it to bond (create a solution) with any atom with a positive or negative charge.
Hope this helps
What is photosynthesis?
Photosynthesis is the process by which plants
use energy from sunlight to produce food.
Without photosynthesis, life on Earth simply would not be possible.
Without photosynthesis, we would not be able to breathe
because it gives off the oxygen that we breathe into our lungs.
Which is the best definition of directional selection?
- a process by which two species can no longer reproduce
- a process by which one of the extreme variations of a trait is favored
- a process by which individuals with either extreme of a trait are favored
- a process by which average individuals in a population are favored
Answer:
a process by which one of the extreme variations of a trait is favored
Explanation:yous welcome
Answer:
A process by which one of the extreme vartion of a trait is favored
What are the male and female reproductive parts of a flower
Answer:
Structure. As a plant's reproductive part, a flower contains a stmen (male flower part) or pistil (female flower part), or both, plus accessory parts such as sepals, petals, and nectar glands .
i really hope i help you
Muscle cells contract using ATP. There is little ATP in your blood stream. How do your muscle cells get ATP they need to contract and move you?
Answer: Aerobic ATP Production
Explanation: During everyday activities and light exercise, the mitochondria of muscle fibers produce ATP in a process called aerobic respiration. Aerobic respiration requires the presence of oxygen to break down food energy (usually glucose and fat) to generate ATP for muscle contractions
list 5 specific examples of density dependent limiting factors
on khan academy are four of them
Sensation is the process of:
Answer:
Sensation is the process through which senses pick up visual, auditory and other senses and then transmit to brain
Hope this helps
The chart below compares the characteristics of four different cells.
CHART OF CELL CHARACTERISTICS
Cell Z
Cell W
Present
Cell Y
Absent
Characteristic
Nucleus
Cell Membrane
Chloroplast
Cytoplasm
Cell Wall
Present
Absent
Present
Present
Cell X
Present
Present
Present
Present
Present
Present
Absent
Present
Present
Present
Present
Absent
Present
Absent
Which cell most likely represents a plant cell?
A. Cell W
B. Cell X
C. Cell Y
D. Cell z
Answer:
b. cell x because it has chloroplast.
Which part of the plant and animal cells in the animals does cellular respiration take place
cellular respiration in eukaryotic cells takes place in the mitochondria. Both animal cells and plant cells depend on cellular respiration for their energy needs, because both animal cells and plant cells need ATP.
what is an annealing
Which of the following examples of membrane transport requires energy from ATP?
a. Movement of Nations from a lower concentration inside the cell to a higher concentration outside of the cell
b. Movement of glucose molecules from a higher concentration outside of the cell to a lower concentration inside of the cell
c. Movement of water into a cell
d. None of the above
Answer:
Active transport uses energy to transport molecules across the plasma membrane. This uses energy from ATP. They also use pumps to get molecules in or out of the cell. Passive Transport does NOT use energy to transport molecules across the membrane.
Explanation:
what are the various characters of living beings
Answer:
All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing. When viewed together, these eight characteristics serve to define life.
Explanation:
What are the characteristics of living beings?
Although nonliving things may show some of these characteristic traits, only living things show all of them.
Organization. Living things are highly organized, meaning they contain specialized, coordinated parts. ...
Metabolism. ...
Homeostasis. ...
Growth. ...
Reproduction. ...
Response. ...
Evolution.
In which column on the chart below would the information below best fit for a mode of reproduction, CANNOT REPRODUCE WITHOUT A HOST?
Answer:
B. Virus.
Explanation:
Hello.
In this case, since bacteria (A.) reproduce via asexual reproduction via mitosis and the animal (D.) and vegetal (C.) cells could reproduce via sexual or asexual reproduction depending on the organism, they do not need a host to start the replication of the DNA and therefore reproduce. In such a way, it is widely known that viruses need a host that facilitates the replication of their DNA or RNA (depending on the virus) since they only have their genetic information but they do not have neither the RNA nor the DNA polymerase that favor such process, that is why they need a host.
Best regards.
You have discovered a very small amount of dna from an ancient organism that you want to save and study. what is the very first thing you should do to allow you to study this dna in the lab?
Answer:
PCR amplify the DNA
Explanation:
glass shattering in to pieces
bubblegum being stretched
a piece of metal expanding due to heat
These are all examples of
A) phase change.
B) chemical change.
C) physical change.
D) temperature change.
Answer:
I think it’s physical change, because the objects aren’t changing into another substance, just changing their physical shape. Hope this helps!
Explanation:
Brainliest?
Answer:
1. 4.
Explanation:
Data supports your claim.
True
False
Answer:
true
Explanation:
because the data needs sometimes to support you
HELPPPPP!!!! PLZZZZZZZ!!!!
EXPLAIN PLEASE I DONT UNDERSTAND
A runner has a speed of 25 m/s. They see the finish line and speed up to 30 m/s. This happens in 5 seconds. If the runner has a mass of 75 kg, with what force did the runner cross the finish line? Show all work to receive full credit.
I know the answer is 75N but I don't know how to get 75N
Given parameters:
Initial velocity = 25m/s
Final velocity = 30m/s
Time = 5m/s
Mass of runner = 75kg
Unknown:
Force to finish the race = ?
Solution:
Force is defined as a pull or push on a body. According to Newton's first law, we can mathematically express force as the product of mass and acceleration;
Force = mass x acceleration
But we know that acceleration is the change in velocity with time, so;
Acceleration = [tex]\frac{Final velocity - Initial velocity}{time}[/tex]
So, force;
Force = mass x [tex]\frac{Final velocity - Initial velocity}{time}[/tex]
Input the parameters and solve;
Force = 75 x [tex]\frac{30 -25}{5}[/tex] = 75N
The runner crosses the line with a force of 75N
Which phrase best describes the independent variable in an experiment?
Answer:
In a scientific experiment, the dependent variable is the variable that is being tested and then measured. The answer referenced in D, the variable that is manipulated, is referring to the independent variable.
Explanation:
The independent variable is the thing you are changing in your experiment (eg.the temperature).