D. Hydrogen bonds............
Answer:
D. Hydrogen bonds
Explanation:
Hydrogen bonds holds the two strands of DNA together.
please answer all :)
Answer:
i) Rusting occurs the least in tubes 2 and 3 because either of air and water which are necessary for rusting is absent in the two tubes respectively.
ii) Rusting occurs most in tube 1 because both air and water which are necessary for rusting are present.
Explanation:
Rusting is a chemical change which involves a redox reaction. During the process of rusting, metallic iron is oxidized to hydrated iron (iii) oxide by oxygen present in air.
For rusting to take place effectively, each of these three factors mist be available: metallic iron, oxygen and water.
In the figure above, the iron nails in the three tester tubes will rust to different extents based on the availability of the three factors.
In test tube 1, the iron nails will rust the most because all the three factors: metallic iron, oxygen present in air, and water are abundantly present.
In test tube 2, the iron nails will rust the least or not at all because boiling of water removes dissolved oxygen from water and the oil layer above the boiled water prevents entry of oxygen from air. Thus, the nail do not rust because one of the three factors for rusting to take place, in this instance, oxygen is absent.
In test tube 3, the iron nails rusts the least or not at all as well because moisture or water is absent. Calcium chloride, a drying agent removes all the moisture from inside the tube. Hence, even though air is present, rusting do not occur as there is no moisture or water present.
Tim and Jan have freckles but their son Mike does not have. Show with a punnete square how this is possible. Tim and Jan have two more children, what is the probability that both will have freckles?.
Answer:
Parents are heterozygous for the trait, and this is how they got a child with no freckles.The probability that the two other children will have freckles is 9/16Explanation:
Due to technical problems, you will find the complete explanation in the attached file.
Which phrase describes the relative age of a rock?
Answer:
Uses the law of superposition to determine which rock is older or younger.
Explanation:
Relative age refers to the age of the rock when compared to other rocks. The law of superposition was developed by Nicholas Steno. In this process, you determine which rock layer is older or younger in terms of the sequence they were laid out or layers were formed. This law states that the lower the layer, the older the rock layer is as compared to those on top of it.
Label the following topographic map. Click on a label below the map to select it, and then click on the appropriate box on the map to place the label. (Increments for contour lines is 50 feet).
Choices:
River Flow East
Depression
2650 feet
Sleep Area
Based on the information, it can be inferred that the concepts are organized from left to right as follows: Depression, Sleep area, River Flow East, and 2650 feet.
How to identify the correct space for each concept?To locate each concept in the correct space we must know how to read a topographic map. In this case, the depression would be the first concept because in the shaded area the contour lines are shown very close, this is generally related to a depression area in which the slope is very pronounced.
On the other hand, the sleeping area is at the top of the mountain at the bottom of the image because a flat region is shown on the top of the mountain.
Additionally, the blue line through the topographic map represents a river so this could be labeled River Flow East. Finally, the contour line that is at 2650 feet high would be the last space considering that each line represents an increase (or decrease) of 50 feet.
Learn more about topography in: https://brainly.com/question/2279445
#SPJ1
The end result of technology is best described as:
O A. the result of a type of scientific experiment.
O B. the growth of new political ideas through science.
O C. controversial new ideas questioned by society.
O D. products or processes that help solve problems.
Answer:
D. products or processes that help solve problems.
Explanation:
What word is used to describe plant cells placed in a hypotonic solution?
Answer:
The answer is Plasmolysis
The word that is used to describe plant cells placed in a hypotonic solution is known as Turgidity.
What is a Hypotonic solution?A Hypotonic solution may be defined as a type of solution that significantly has osmotic pressure lower than that of another solution to which it is compared. This type of solution normally contains a lower amount of solute.
According to the context of this question, when a plant cell is placed in a hypotonic solution, water will flow through it by the process of osmosis from the solution into the plant cell. This leads to cause the cell to expand or swell. But as the cell wall of the plant is very rigid, it keeps the cell from bursting.
Therefore, the word that is used to describe plant cells placed in a hypotonic solution is known as Turgidity.
To learn more about Hypotonic solutions, refer to the link:
https://brainly.com/question/122954
#SPJ2
What is one advantage of sexual reproduction?
A. offspring show more genetic variation
B. offspring are identical to parents
C. offspring need only one parent
D. more offspring are born
Answer:
B
Explanation:
Organisms produced by sexual reproduction have two parents and are genetically similar to both but not identical to either. it produces variation in the offspring. the species can adapt to new environments due to variation, which gives them a survival advantage.
Exercise Multiple Choice Question 1. A cell has mitochondria, centrosome with centrioles, nucleus and other cell organelles. Based on this information, this cell could be a cell of A. an apple B. a yeast. C a cat. D a flower.
Answer:
Cat
it contain centrioles which is present in animal cell
8. The process that occurs only in the small intestine to increase the absorption of
food and nutrients by mixing food.
A. Digestion
C. Absorption
B. Peristalsis
D.
Answer: C. Absorption
Explanation:
Hope it helps if not sorry
good thinks about space travel being done with private businesses
Answer:
I don't think is plausible and well encouraged as it wastes cost which is not easy to earn by companies
You are an aquatic biologist studying a small lake. The stream that drains into this lake runs by croplands. You are detecting a pesticide called atrazine in the insects and worms that live in the lake. The predatory birds such as herons and egrets have very high concentrations of atrazine in their blood. The birds prey on the frogs and small fish. What condition best explains the high atrazine level in the birds?
The condition best explains the high atrazine level in the birds is biological magnification. The correct option is D.
What is biological magnification?Biological magnification is the occurrence of any chemical in the body of a living organism than in outer space or the environment. The chemicals can be toxins or pesticides. They are present within the tolerant level in the tissue.
Here, the atrazine level is high in frogs and small fish than in the surrounding water, which is going in birds.
Thus, option D. biological magnification is correct.
The full question is attached in the image below:
Learn more about biological magnification, here:
https://brainly.com/question/14315613
#SPJ2
Classify the chemical equations as being balanced or not balanced.
Answer:
a balanced equation can be seen when number of moles of a certain atom on the right hand side equals to number of moles of that atom on the left hand side
Answer:
I hope this helps
Explanation:
Oxygen has an atomic number of 8. The n=1 energy level has two electrons, and the n = 2 energy level has six electrons. Oxygen's valence is _______.
● +2
● -2
● +1
● -1
Answer:
Oxygen's valence is +2
the answer is +2
I hope this helps
Answer:
● -2
Explanation:
Oxygen needs to gain 2 more electrons to have 8 electrons in outer most shell (octet rule). Gaining electrons makes you negative thus, oxygen gains 2 electrons and has valence of -2.
deepali here!!!
What is precipitation reaction???
Answer:
When 2 or more liquids chemically combine to form a solid
Explanation:
During respiration, animals excrete it as a gas known as
Answer:
carbon dioxide
hope it helps
The invention of the microscope led to the discovery of the cell by Robert Hooke. While looking at cork, Hooke observed the box-shaped structures, which he called "cells" because they reminded him of the cells (rooms) found in monasteries. This discovery led to the development of the cell theory. Credit for developing the cell theory is usually given to two scientists. Theodor Schwann and Matthias Schleiden. The cell theory was then proposed by Theodor Schwann in 1839. There are three parts to this theory: living organisms are made up of cells, cells are the basic structural unit of all organisms, and all cells come from pre-existing cells. Which of these is supported by the tenets of the cell theory? Select ALL that apply. les )) A) Energy flow occurs within cells. B) Mitosis produces identical daughter cells. C) Living organisms can be unicellular or multicellular. D) DNA is copied and passed between cells during cell division. E) Single-celled bacteria grow and then divide in half to make new bacteria.
Living organisms are made up of cells, cells are the structural unit of all organisms, cells come from pre-existing cells Energy flow occurs within cells.
What are the main points of cell theory?The main points of cell theory are:
All living things are made up of cells.Cells are the raw building blocks of life.All cells come from preexisting cells through the cycle of cell division.Energy flow occurs within cells.Thus, cells come from pre-existing cells Energy flow occurs within cells.
To learn more about cell theory click here:
https://brainly.com/question/1468725
What pigment do plants use as a catalyst for photosynthesis?
A. Water
B. Cyanobacteria
C. Chlorophyll
D. Carbon dioxide
Answer:
Chlorophylls are natural green pigments ubiquitously present in plant kingdom, which play an important role in photosynthetic process, a vital function for life on Earth.
Explanation:
Your turn. Now you have to find the right answer based off my explanation
Answer:
C. Chlorophyll
Explanation:
Chlorophyll is the pigment, that plants use as a catalyst for photosynthesis.
Part E
Explain your justification for the changes in trait distribution between years 1 and 10. What do you think will happen to the population by year 15?
Answer:
It will continue to rise.
Explanation:
Genetic variation results in the changes in trait over the period of time. Hence, traits do change over the years, but it is a gradual process. The population will become more stable due to successful traits.
What is genetic variation?Genetic variation refers to the changes in the genotype of an individual. It imparts stability to the population. Genetic variation results from meiotic cell division where recombination of gene produces genetic exchange of heredity material.
Those traits which are successful in nature that means those variations which provide stability to the organism in any environment are favoured. Organisms with such variations adapt, survive and further reproduce to continue their existence. Such traits are transmitted to the progeny as well.
Thus, gradual accumulation of changes in traits contribute to a more stable population over the span of years.
Therefore, changes in traits are important in determining the track of evolution on earth.
Learn more about traits, here:
https://brainly.com/question/1463051
#SPJ2
I really need help on this question and nooo links the question is in the screenshot
biomagnification
eutrophication
global warming
biogeochemical cycles
Two children and their dog are outside. The children are skating, and the dog is eating. It begins to rain, and the children and dog rush inside so quickly that it causes them to breathe more rapidly. When they are inside, the children dry their hair using towels, and the dog dries it's fur by shaking it's fur.
Look at the list of actions below:
1. The children skating
2. The dog eating
3. The children breathing more rapidly
4. The dog breathing more rapidly
5. The children using towels to dry their hair
6. The dog shaking it's fur to dry it's fur
Which actions best represent inherited behaviors?
A - 2,3,4,6
B - 2,4,6
C - 1,5
D - 1,2,3,4,5,6
Which microscope were cells first observed?
Answer:
Leeuwenhoek made his own microscope lenses, and he was so good at it that his microscope was more powerful than other microscopes of his day. In fact, Leeuwenhoek's microscope was almost as strong as modern light microscopes.
Explanation:
Hope this helps you
And your Answer is Best management practices (BMPs) are methods that have been determined to be the most effective and practical means of preventing or reducing non-point source pollution to help achieve water quality goals. BMPS includes both measures to prevent pollution and measures to mitigate the pollution.
Answer:
Use Fertilizers Wisely.
Apply Pesticides Wisely.
Use Landscaping Practices that Prevent Erosion.
Wash Your Vehicle Wisely.
Dispose of Pet Waste.
Use and Dispose of Household Chemicals Safely.
Evaluate Existing Roads
Which of the following could be reasons why population sizes may reach and maintain plateaus? Select the three (3) that apply.
Answer:
limits in food supply
competition with other species
competition for space
How do roots and seeds get oxygen to produce energy through cellular respiration?
A. from the water
B. from fertilizer
C. the soil must contain oxygen
D. the leaves send oxygen to the roots
Answer:
C. the soil must contain oxygen
Explanation:
Roots of plant take oxygen from air that is present in-between the particles of soil.
Don't fail me now brainly!!!!
21. For each of the following, state the type of input energy and the useful output
energy.
a. battery
b. gas-powered weed-eater
c. bedside lamp
d. horn on a bicycle
Input Energy
Useful Output Energy
4
Battery
Gas-Powered Weed-eater
Bedside lamp
Horn on a bicycle
Answer:
Explanation:
if you get the nintindo 64 throw it out a window then call the garbage man hit the folks den shake his hand he will give you the math answer and you have to cll hm on the newest flip phone out right now
what is a genotype
A.)an organism's combination of genes for a trait
B.)the collection of dominant genes in an organism
c.) the ratio of dominant to recessive genes in an individual
D.) an organism's appearance as a result of its genes
Answer:
The answer is B
Explanation:
because that contains dominant genes
Scientists have observed the exponential growth of lionfish in the Caribbean Sea. Which of these predictions about the future of the lionfish
population is the most likely to occur?
А.
The lionfish population will continue growing exponentially indefinitely
В.
A limiting factor will cause the growth of the lionfish population to slow down, forming a pattern of logistic growth
ооо
C. A limiting factor will cause the lionfish population to decline rapidly, and eventually decrease to near zero.
D
The lionfish population will enter a cycle of increasing and decreasing numbers, typical of many predators and prey.
Answer:
B
Explanation:
thank me later :)
Answer:
answer is D
Explanation:
I got it right in exam
What information did you include in your response? Multiple Choice
A. Crossing over is the process by which genetic material is exchanged by non-sister chromatids during meiosis.
B. Crossing over results in a new combination of genetic information for the cell for a specific trait.
C. Crossing over ensures that organisms are not identical from generation to generation.
D. Genetic recombination allows for a variation in genetic material that is passed through the generations.
Only you can answer this unless the last response is given.
Answer:
click any answer and it will be correct
Explanation:
What are some nonlethal solutions to the problem of wolves attacking cattle and sheep?
Answer:Fences, loud alarms, and keeping animals in a safe space
Explanation:
This animal represents what kind of body symmetry?
- asymmetry
- radial symmetry
- bilateral symmetry
Answer:
Bilateral symmetry
Explanation:
the property of being divisible into symmetrical halves on either side of a unique plane. I am pretty sure itis this one, hope i helped you!
