A population of birds eats nuts and seeds. Some birds have larger beaks, and some have smaller beaks. A pair of birds usually produces four or five offspring each year. After several yeaers of little rain, the seeds became larger and larger. The birds with larger beaks were better at cracking these seeds. After several generations, the average beak size in the population increased. Bird beak size increasing after several generations is: a. decent with modification. b. variation. c. overproduction. d. adaptation

Answers

Answer 1

As far as I can tell, the answer would be D. Adaptation. The birds are evolving to adapt to their environment, and as such, their beaks are getting larger to crack larger seeds.


Related Questions

Which of the following can Jamie offer as evidence that supports the cell theory, based on these slides?
SC.912.L.14.1
All cells come from parent cells that exchange DNA.
All living things are composed of single cells or multiple cells.
All cells grow and develop until they reach a certain size, at which point they die.
All cells are equipped with structures that enable motion, such as pseudopods or flagella.

Answers

Answer b

Explanation: Since “The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells.”

All living things are composed of single cells or multiple cells. Therefore, option B is correct.

What is cell theory?

Cell theory is given by Schleiden and Schwann. According to this theory, cells make up every biological entity; they are the basic building block of life, and all life originates from earlier forms of life. Today, the cell idea has become one of the guiding concepts of biology due to its widespread acceptance.

A cell is the lowest form of life. This indicates that a cell cannot be divided into smaller units and yet be considered to be alive. An entire organism, such as a person, can be divided into smaller parts, such as organ systems, organs, and tissues.

Organisms can be unicellular or multicellular. Therefore, option B is correct.

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Imagine sperm and egg cells have 46 chromosomes like other cells in the body. That
is they have 46 chromosomes when a sperm cells fertilizes an egg cell. Would that
affect the total number of chromosomes in their offspring or children? Tell why or why
not.

Answers

Answer:

When an egg and sperm having 46 chromosomes similar to the body cells, their fertilization produces offsprings or children with 92 chromosomes which are double number of chromosomes as compared to parent cell. So they are not similar to parents. As we know that fertilization is the process of fusion of gametes and paring up of chromosomes. The offsprings are different from their parents in having more chromosome sets.

Explanation:

In one or two paragraphs, compare and contrast surface ocean currents and deep water ocean currents in terms of causes and characteristics.
Please!!!

Answers

Answer:

Surface ocean currents

Surface currents refer to movement of the top layer of ocean water. Surface water flows in to replace the sinking water, which in turn becomes cold and salty enough to sink.

examples of surface ocean currents are California Current (Cal) in the Pacific ocean basin and the Canary Current (Can) in the Atlantic ocean basin.

Deep ocean currents

Deep-water currents describe water movement patterns far below the ocean’s surface and the influence of the wind. When ocean water freezes, forming sea ice, salt is left behind causing surrounding seawater to become saltier and denser. Dense-cold-salty water sinks to the ocean bottom. 

Mankind has used biotechnology in agriculture, food production, and medicine for thousands of years. As advances are made in biotechnology, it is important to make informed decisions in order to avoid the hazards associated with which of the following?

Answers

Answer:

D dangerous organisms

Explanation:

i’m almost 100% positive if not then it’s probably A global warming

What is a model..???

Answers

What kind of model there is many kinds

Answer:

two definitions 1 a person trying in something to show pepole like dresses

2 a modle in science so scienntist can see and go wow this is what it is like the dinosur museum the t rex is a modle of how it would look like

Explanation:

hope it helps keep on questioning on lol

Which of the following is table sugar?
glucose

fructose

sucrose

galactose

lactose

Answers

Answer:

sucrose & galactose

Galactose is the correct answer

I need to answer ASAP Pls

Answers

Answer:

separate during meiosis l

Explanation:

yan Napo Ang answer Sana makatutulong

Fill in the blank with correct term or phrase to complete each sentence.
19. In eukaryotes, transcription takes place in the________
20. Transcription begins when________
binds to the gene's promoter.
21. RNA polymerase adds complementary_________
as it "reads" the gene.
22.
___________is a strand of nucleotides that carries the DNA message from the nucleus to the ribosomes.
23.
_____________are the part of DNA that is transcribed into mRNA.
24.
______________are the part of DNA that is not transcribed into mRNA.

Answers

Answer:

19) nucleus

20) RNA polymerase

21) DNA / RNA nucleotides

22) The mRNA molecule

23) Templates

24) Introns

Explanation:

Select the correct statement(s) about angiosperm seeds. Select all that apply. Select all that apply. The embryo in an angiosperm seed is the offspring of the sporophyte plant. All structures in an angiosperm seed are diploid. An angiosperm seed contains structures contributed by three generations of plants.

Answers

Answer:

An angiosperm seed contains structures contributed by three generations of plants.

Explanation:

The spermatophytes, also known as phanerogams, represent a group of seeded plants that have developed special structures for reproduction. This group (spermatophytes) consists of gymnosperms or 'naked seeds', and angiosperms or 'enclosed seeds'. The seed is an organ generated from the ovule after fertilization by the pollen grain, which gives rise to a seedling during the process of germination. In flowering plants, seeds are generated by a process of double fertilization and consist of three tissues: 1-an embryo (generally diploid) formed by repeated mitotic division of the zygote cell, 2- an endosperm tissue (generally triploid, 3n) that nourishes the embryo during its growth, and 3-a seed coat generated from the integuments of the ovule. In angiosperms, seeds consist of three generations: the gametophyte that provides nutrients to the embryo, the embryo, and the seed coat which is generated from the parental tissue (sporophyte).

10. Imagine a seesaw, like on a children's playground. Which of the following drawings of a seesaw best represents equilibrium? Explain. help pleaseee​

Answers

Answer:

the first one

Explanation:

equilibrium- a state of physical balance.

so the first one looks the most balanced on both sides

Also if you look up "equilibrium seesaw" you see pictures that look similar to the first one

Name 4 body structures composed of protein

Answers

Collagen protein fibers are located in many parts of the body, including the muscles, tendons, ligaments, and bones. Collagen and another protein called elastin are often found together.

In one experiment, the heart rate of a mollusk at rest was measured at 0.3 cycles/s. How many times did the mollusk's heart beat in 1 min?

Answers

Answer:

18 times

Explanation:

Heart rate = 0.3 cycles/s

Heart rate = [tex]\frac{number of cycles}{time}[/tex]

number of cycles = heart rate x time

But, 1 min = 60 seconds

⇒ number of cycles = 0.3 x 60

                                  = 18

Thus, the number of times that the Mollusk's heart beat in 1 min is 18.

Select the correct text in the passage.
Pick out the sentences that correctly describe marine mammals.
Marine mammals are endothermic, or warm-blooded. Species such as whales breathe air though their gills. They have a thick layer of blubber
that helps maintain buoyancy. They can stay underwater indefinitely. Dolphins are a type of toothed whale. Baleen whales feed on large fish
and sometimes seals.

Answers

Marine mammals are endothermic. I think that's the correct answer 'cause they can produce their own body heat (which therefore means that they are warm-blooded) and they can keep at a stable temperature even in harsh conditions. Plus, whales don't have gills b/c they are mammals (and mammals don't have gills), not all mammals have blubber (it's mainly penguins and seals), marine mammals can stay underwater for a long amount of time...but they eventually need to come up for air, and baleen acts like a "filter"; it "filter" and separates the water from the krill/microorganisms.

Hope this helps! :)

If something is at risk of dying out, it is:
O
extinct
O endangered

Answers

answered: endangered
endangered because extinct means there totally dead

Radiation that is redshifted has the peaks of its waves
A.with more energy
B.closer together
C.both closer together and with more energy
D.farther apart

Answers

Answer:

A) With More Energy

Explanation:

Answer:

D

Explanation:

i never get anything wrong ever

discuss why apes are considered the most closely related organisms to humans. Use evidence to back up your answer.

Answers

Answer:

Apes are considered the most closely related organisms to humans because we share so much dna. For example, we share 99% of our DNA with Chimpanzees. On average, human beings share 65% of our dna with other mammals but apes are a much higher percentage, on average in the higher 90's.

Explanation:

A protein isolated from a thermophilic bacterium shows a molecular weight of 160 kD when eluted from a size-exclusion chromatography column, but when the purified protein is run on an SDS-PAGE gel, a single band of 80 kD is observed. These results tell us that the protein is eluting from the size-exclusion column as a

Answers

Answer:

as a dimer consisting of two identical monomers (80 kDa subunits) that are packed together via hydrophobic interactions

Explanation:

SDS-PAGE (sodium dodecyl sulphate–polyacrylamide gel electrophoresis), is an electrophoretic methodology used to separate proteins that have a molecular weight between 5 to 250 kDa. SDS is a well-known ionic detergent that is able to break hydrophobic interactions and hydrogen bonds. Moreover, size-exclusion chromatography is a filtration technique that separates molecules in solution according to their molecular size. In this case, SDS-PAGE showed that the target protein is composed of two identical subunits (monomers) of 80 kDa each, which were separated by the detergent and formed one single band in the SDS-PAGE gel.

Short tails (T) are dominant to long tails (t). What is the probability of a long-tailed mouse in the cross Tt x tt?
25%
50%
O 75%
O 100%

Answers

Answer:

50%

Explanation:

if you do a punnett  square you get two Tt and two tt. so two tt is half, which means half will be long-tailed tt, so 50%

50% of the mouse offsprings will have long tail.

According to this question, a gene coding for tail length in mouse is involved. The allele for short tails (T) are dominant to long tails (t).

In a cross between Tt (short tail) × tt (long tail), the following gametes will be produced by each parent:

Tt - T and ttt - t and t

Crossing these gametes in a punnet square (see attached image), the following offsprings of mouse will be produced: Tt, Tt, tt and tt.

Tt (2) = Short tail mice (50%)tt (2) = long tail mice (50%)

Therefore, 50% of the mouse offsprings will have long tail.

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5. Dieting often leads to weight gain.
True
False

Answers

Answer:

the answer is false. Dieting usually leads to weight loss.

Describe the metabolism of chemoautotrophs. What makes them different from photoautotrophs in terms of how they make chemical energy?

Answers

Phototrophs are organisms that capture light energy and convert it to chemical energy inside their cell.

Chemotrophs, on the other hand, do not get their energy from carbon. These are organisms that break down either organic or inorganic molecules to supply energy for the cell through chemosynthesis.

If the anticodon of a molecule of tRNA has the sequence GAU, what was the original DNA sequence?

Answers

Answer:

CTA

Explanation:

DNA to RNa

A---> T

C--> G

RNa to dna

A--> U

C---> G

If the anticodon of one molecule of tRNA contains the sequence GAU, then CTA was the original DNA sequence.

What is DNA sequencing?

DNA sequencing is defined as the laboratory procedure used to determine the exact sequence or order of the four building blocks or bases that make up DNA. Information that is stored in DNA in a code which is formed by arranging the four bases which are adenine, cytosine, guanine and thymine which are identified by letters A, C, G and T in different order.

Within double-stranded DNA, nitrogenous bases on one strand pair with complementary bases on the other strand. A always pairs with T, and C always pairs with G, during DNA replication, the two strands separate into a double helix.

Sequence of tRNA is GAU, so the DNA sequence is CTA as C complements to G, A to T and U to A as in RNA Uracil is present in the place of thymine.

Thus, if the anticodon of one molecule of tRNA contains the sequence GAU, then CTA was the original DNA sequence.

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match the correct word to its definition

Answers

Meiosis is the first one on top. Mitosis is the second one and dna is the last one

Which of these is NOT a job of the root of the plant?

A.
to hold the plant in place
B.
to make food
C.
to take in water and minerals from the soil

Answers

Answer:

"The roots of the plant do not make the food. Thus, the answer to this question is letter B. The roots hold the plant in place and through them the minerals and water from the soil. The roots is also involved in the vegetative reproduction and competitions with other plants."

Answer:

B. To make food.

Explanation:

The roots of a plant take water and minerals from the soil but they are not responsible for making the food for the plant. The roots supply what is needed to do so.



Answer and I will give you brainiliest

**Please only surely answer**​

Answers

Bones in the inner ear

The hair cells are located in the cochlea which is situated in the temporal bone

Answer:

Semicircular canals

Your welcome!!

How do the different components of the system interact? How do organisms live, grow, respond to their environment, and reproduce?`

Answers

Each individual body system works in conjunction with other body systems. Each of your body systems relies on the others to work well. All living organisms are made of cells.. organisms to stimuli from their environment and actively maintain their internal environment through homeostasis. They grow and reproduce, transferring their genetic information to their offspring.

What happened during the Industrial revolution video?

Answers

Answer:

I need a link to watch the video

Answer:

Here's is your ans pic

Explanation:

Tq

Which biogeochemical cycle includes the exoskeleton and shells of marine organisms as a reservoir?
A.
carbon
B.
nitrogen
C.
sulfur
D.
oxygen

(its not oxygen)

Answers

Answer:

I think it is oxygen

Hope this helped

ALL THE BEST !!

How many grams of water are in 8.16 x 1022
molecules?

Answers

So you have to multiply the two numbers together so the answer would be 83.3952

What describes gneiss?

Answers

Gneiss is a high grade metamorphic rock, meaning that it has been subjected to higher temperatures and pressures than schist. It is formed by the metamorphosis of granite, or sedimentary rock. Gneiss displays distinct foliation, representing alternating layers composed of different minerals.

Gneiss is a type of metamorphic rock that is formed by high pressure and temperature caused by the earth's surface.

What are metamorphic rocks?

Metamorphic rocks are those rocks that are formed when other rocks are introduced under high temperatures and pressure that is exerted by the layers of the earth. There are three types of metamorphic rocks.

Since gneiss is a high-grade metamorphic rock, it has undergone more intense heat and pressure than schist. It is created through the transformation of sedimentary rock, such as granite.

Gneiss has distinctive foliation or alternate layers made of various minerals. This rock comes under the metamorphic regional type of rock.

Therefore, Gneiss rocks are those metamorphic rocks that are formed on convergent plate boundaries.

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HELP PLEASE ASAP.
Why do stems have bark? What does the phloem do?

Answers

Answer:In old stems the epidermal layer, cortex, and primary phloem become separated from the inner tissues by thicker formations of cork. Due to the thickening cork layer these cells die because they do not receive water and nutrients. This dead layer is the rough corky bark that forms around tree trunks and other stems.

Explanation: wikipedia.

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