Answer:
Gradually, as generations of elephants continued to selectively use and develop their trunks.
Explanation:
Jean-Baptiste Lamarck was famous French Naturalist. He was a soldier, a biologist and an academic. He gave an early theory of evolution known as the theory of Lamarckism.
It was Lamarck who first believed that elephants earlier had small trunks. But eventual when there was scarcity of food and water, the elephants stretched out its trunk to reached out for food such as trees and also water. And as a result their offspring inherited long and powerful trunk.
In his theory of Lamarckism, he believed that the species passes on its traits to the offspring which they acquired through their use in their lifetime. In this case, the elephants might have used their trunks in such a way that they became long and strong over time and they passed tis trait to their babies.
how plants and animals get the matter they need to survive.
Answer:
Plants are able to use the energy from sunlight to produce sugars, which are a source of energy and matter. On the other hand, an animal cannot make its own food, so it eats plants and other animals.
Explanation:
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Answer:
it controls which substances enter and leave the cell
Explanation:
Answer:
may be the strength and stiffness
when are chromosomes (dna) copied?
Answer:
Interphase begins with G1 (G stands for gap) phase. During this phase, the cell makes a variety of proteins that are needed for DNA replication. During S phase, which follows G1 phase, all of the chromosomes are replicated. Following replication, each chromosome now consists of two sister chromatids.
Have a good day. :)
Answer:
Chromosome replication
Explanation:
Chromosome replication is a key event during the cell cycle that must be completed before a cell divides. To reproduce successfully, every cell must replicate its chromosome and distinguish these sister chromosomes from one another.
can some one plz help me on this question its hard :( ill give brainliest
A specific characteristic that an organism can pass on to its offspring through its genes is called a
Answer: A Trait
Explanation:
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Use the images below to answer the question. 2. What makes all of the samples different from each other?
Answer:
Shape and structure.
Explanation:
The difference in shape and structure of these pictures is responsible for the difference from each other. The organisms present in these pictures are different in their size, shape and composition of their body. Some are small and some are large, some are living while the others are non-living, some are very hard whereas the others are soft and fleshy. So the organisms present in these samples are different from each other in a variety of ways i.e. size, shape and body structure.
500pt biologiofyyyyy
Answer:
Im sorry this isnt the answer You may report me if you wish
Explanation:
I know i may be unwanted here but I just want you to know that you are incredible and that I love you for you! You are special to everyone you meet, and should not change who you are. I know your life may be tough, but you are strong and can get through it!
TRUE OR FALSE!!!
______ 1. Before most cell divisions, most cells donot increase in size.
______ 2. During cell division, one of the daughtercells gets all of the larger chromosomes, and the other daughter cell gets allof the smaller chromosomes.
______ 3. The number of chromosomes in a cell is duplicatedbefore the beginning of mitosis.
______ 4. Many species of bacteria have a single circularchromosome that consists of double stranded DNA.
______ 5. Under ideal conditions, some bacteria canreproduce every 20 seconds.
Answer:
1. true
Explanation:
Which of the following best predicts and justifies how the proportion of the Tibetan population with big blood vessels living in the mountains will change over the next 1,000 years (assuming conditions remain stable)?
Question 2 options:
I predict that the proportion of individuals with big blood vessels living in the mountains will decrease because there is a variation in blood vessel size and those with the smaller blood vessels can store more red blood cells than larger vessels, so more oxygen can be moved to the body cells. Therefore, they have a better chance of surviving and passing this trait on to their offspring.
I predict that the proportion of individuals with big blood vessels living in the mountains will stay the same because there is a variation in blood vessel size and that variation will remain in a population. The is what is so cool about humans, we are all so unique.
I predict that the proportion of individuals with big blood vessels living in the mountains will increase because there is a variation in blood vessel size and those with the bigger blood vessels can deliver more oxygen to the body cells and therefore have a better chance of surviving and passing this trait on to their offspring.
I predict that over 1,000 years, the proportion of individuals with big blood vessels living in the mountains will not change because a change can’t happen to an individual, an individual can only increase the amount of red blood cells it makes, not its blood vessels.
Answer:
Over 1,000 years, the proportion of individuals with big blood vessels living in the mountains will not change because a change can’t happen to an individual, an individual can only increase the number of red blood cells it makes, not its blood vessels.
Explanation:
Evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection
What is blood vessels?
The blood vessels are the components of the circulatory system that transport blood throughout the human body.
I predict that over 1,000 years, the proportion of individuals with big blood vessels living in the mountains will not change because a change can’t happen to an individual, an individual can only increase the amount of red blood cells it makes, not its blood vessels.
Hence, option D is correct.
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Which diseases would individuals have the greatest difficulty preventing in themselves?
Answer: Cystic fibrosis-genes
Explanation:
Trust me that’s the answer
Bacteria are only able to be produced from other bacteria already existing on earth.
Which theory best describes this?
Answer:
Bacteria reproduce by binary fission. In this process the bacterium, which is a single cell, divides into two identical daughter cells. Binary fission begins when the DNA of the bacterium divides into two (replicates). Bacteria do not grow and multiply the same way as animals or humans. They take in nutrients and reproduce by dividing – one bacteria splits and becomes two bacteria, two become four, four become eight and so on.
Explanation:
Help me with this please
5. Why is the ileum long and coiled?
Answer:
The huge length gives an adequate opportunity to the body to process the food and concentrate greatest sustenance while the various finger-like projections called villi alongside miniature villi increment the surface region for assimilation.
Explanation:
I hope this helps u! :D
What type of animal is a platypus related to?
No links pls
Answer:
Echidna
Hope this Help!~
soooooooooooo like its Echidna
(PLEASE HELP!!!) Suppose scientists genetically modified a species of algae to produce more oil. This algal species reproduces asexually. Will all of the offspring of the genetically-modified algae also produce more oil? How do you know?
Answer:
Yes all of the offspring of the genetically-modified algae would produce more oil.
Explanation:
When an organism is genetically-modified to reproduce asexually, it makes exact copies of itself since it is the only one passing genes whereas if normal sex were to occur and both parents would pass 50%-50% of their genes down to the child.
Pleas e Brainlyiest if you answer
Answer:
B
Explanation:
Answer:
The second option (i think)
Explanation:
Chromosomes are the things that make organisms what they are. They carry all of the information used to help a cell grow, thrive, and reproduce. Chromosomes are made up of DNA. Segments of DNA in specific patterns are called genes.
Label the chart correctly
A. transportation
B. transcription
C. translation
D. transpiration
2.
A.transportation
B. transcription
C. translation
D.transpiration
3.
A. DNA
B. mRNA
C. Amino Acid
D. Protein
4.
A. DNA
B. mRNA
C. Amino Acid
D. Protein
5.
A. cytoplasm
B. nucleus
C. plasma membrane
D. ribosome
6.
A. DNA
B. mRNA
C. Amino Acid
D. Protein
7.
A. copies
B. returns
C. sends
8.
A. cytoplasm
B. nucleus
C. plasma membrane
D. ribosome
9.
A. DNA
B. mRNA
C. Amino Acid
D. Protein
10.
A. DNA
B. mRNA
C. Amino Acid
D. Protein
11.
A. alive
B. dead
Answer:c
Explanation:
1) Which of the following are scales of
ecosystems?
a. Micro
b. Macro
C. Messo
d. Ecotone
Answer:
Messo
Explanation:
Which surface was warmer during the month of October? The pond or the sidewalk?
Answer:
The pond was warmer during the month of October.
Explanation:
Water has a high specific heat capacity, therefore more heat is required to change its temperature. This is why aquatic life is able to stay alive even when temperatures drop drastically. The sidewalk however, will more than likely adapt to the temperature change quickly as concrete does not have a very high specific heat capacity.
Which of the following is evidence that a chemical reaction has taken place?
Check all that apply. *
- unexpected color change
- release/absorb heat energy
- melt from solid to liquid
- solid precipitate forms
- gas bubbles form
Answer:
color change
release/absorb energy
solid precipitate forms
gas bubbles.
The wrong answer is melt from solid to liquid.
A plant cell contains a large membrane bound, sac-like structure that stores materials such as water, salts, proteins, and carbohydrates. When this sac-like structure is full it makes the cell rigid, which enables a plant to stand up straight. This sac-like structure is most likely what organelle?
A. nucleus
B. vacuole
C. chloroplast
D. mitochondrion
How does acid rain (deposition) form and travel to effect the environment?
Answer:
The ecological effects of acid rain are most clearly seen in aquatic environments, such as streams, lakes, and marshes where it can be harmful to fish and other wildlife. As it flows through the soil, acidic rain water can leach aluminum from soil clay particles and then flow into streams and lakes.
Explanation:
A black chicken and a white chicken are crossed. What is the probability that they will have erminette chicks?
Answer:
[tex]Probability = 100\%[/tex]
Explanation:
Given
Crossing of a black chicken and a white chicken
Required
The probability of having erminette chicks
The genotype of a black chicken is represented as: BB
The genotype of a white chicken is represented as: WW
The genotype of an erminette chicken is represented as: BW
Using a Punnett square, we have:
[tex]\begin{array}{ccc}{} & {B} & {B} & {W} & {BW} & {BW} & {W} & {BW} & {BW}\ \end{array}[/tex]
The result of crossing the two chicken gives 4 BW out of a total of 4
i.e 4 erminette chickens out of 4 possible chickens
So, the probability is:
[tex]Probability = \frac{4}{4}[/tex]
[tex]Probability = 1[/tex]
Represent as percentage:
[tex]Probability = 100\%[/tex]
A planet has less mass than a galaxy and more mass than the star it orbits.
True
False
Answer:
False is your answer
Find the measure of 3.
an adaptation is
A - how an organism evolves during its own lifetime
B - any trait an organism possesses
C - a gene an organism has
D - a trait that helps an organism survive in its environment
1. Place the letters in the correct order for DNA replication (a, b, c): ___
a. Daughter strands are formed using complementary base pairing.
b. DNA unwinds
c. The DNA of the daughter strands winds together with its parent strand.
2.Why is DNA replication called “semi-conservative”? ___
3.What enzyme unwinds or unzips the parent strand? ___
4.What enzyme connects the new bases to the old bases in the DNA template? ___
5.___DNA replication results in two DNA molecules,
a. each with two new strands
b. one with two new strands and one with 2 original strands
c. each with two original strands
d. each with one new strand and one original strand
6.___DNA replication is said to be semiconservative because:
a. both RNA and DNA synthesis are involved in the process.
b. part of the telomere is lost during each round of replication.
c. a new double helix contains one old and one new strand.
d. each new strand is complementary, not identical, to its template
Explanation:
1. b-a-c
2. Because in each of the new pair of double stranded DNA formed after replication, a parent strand is present in each.
3. Helicase
4. DNA Polymerase
5. Option D
6. Option C
Fossil fuels store energy from the sun as
Fuels, including fossil fuels, are energy sources. Fossil fuels are powered by solar energy, which also powers photosynthesis, which transforms carbon dioxide and water into the fundamental constituents of prehistoric plants and animals.
What Fossil fuels store energy from the sun?Biomass, fossil fuels, as well as some renewable energies like wind and solar power, are all derived from the sun. Simple solar energy in a secondary form is what fossil fuels are.
This energy is then released millions of years later, when these plants have transformed into fossil fuels.
Therefore, Simple solar energy in a secondary form is what fossil fuels are. Through photosynthesis, the sun's initial energy is collected and stored in chemical bonds as plants develop.
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what is the movement that helps the movement of undigested food through the large intestine?
Answer:
Food moves through your GI tract by a process called peristalsis. The large, hollow organs of your GI tract contain a layer of muscle that enables their walls to move. The movement pushes food and liquid through your GI tract and mixes the contents within each organ.
Explanation:
hope it help a little
How can a person cannot taste PTC I'd both of their parents have the ability to taste PTC?
Answer:
the parents are (Tt) and each passed down the recessive allele so the child is (tt)
Explanation:
