Answer:
the first option
Explanation:
As the soil gets darker, brown beetles become easily recognised by predators (like birds) and will be eaten. Black beetles however, are better camouflaged and will less likely be spotted by the birds. Black beetles will survive and interbreed, allowing the recessive allele to be passed on to upcoming generations.
Selective pressure is what makes the genetic pool shift toward a particular genotype with a particular phenotype (recessive black in this case) that gives the new generations a selective advantage. They're more likely to survive and reproduce. Survival of the fittest.
Genotype- the genetic makeup of an organism (eg: the recessive gene for black; bb)
Phenotype- physical feature of an organism as determined by the genotype (the colour black)
Selective pressures will increase the number of brown beetles. The correct option is 2.
What is Selective pressure?Any factor that reduces or increases reproductive success in a subset of a population may exert evolutionary pressure, selective pressure, or selection pressure, thereby driving natural selection.
Selection pressure can be defined as a force that causes an organism to evolve in a specific direction.
It is not a physical force, but rather an interaction between natural variation in a species and environmental factors that causes certain forms to have an advantage over others.
A beetle species can be either black or brown in color. A single gene determines the color of the beetle, and black is recessive to brown.
The soil in the area has darkened and taken on the color of black beetles. Brown beetle populations will increase as a result of selective pressures.
Thus, the correct option is 2.
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please help me i don’t know nun of this
Answer:
A and A
Explanation:
Answer:
idek
Explanation:
The study of fossil succession allows
O matching of similarly-aged rocks from different outcrops
O the study of habits of extinct mammals
O recognition of the kings of the beasts in past times
O absolute dating of fossil-bearing strata
Amoebas are single-celled organisms
Explanation:
no amoebas are multi cellular
Answer:
true
...brainliest plz
If a cell in G1 phase has 4 chromosomes, how many chromosomes will it have by the end of meiosis?
Answer:
G1 phase (Gap 1) - Cellular contents excluding the chromosomes, are duplicated. II. S phase (DNA Synthesis) - Each of the 46 chromosomes are duplicated by the cell. III.
Explanation:
*WORTH 12 POINTS * Punnett squares show all of the following except __________.
A. all of the possible traits an organism can have
B. the possible outcomes for the genotype of an offspring
C. the possible outcomes for the genotype of an offspring
D. the genotype of the father for a specific trait
Answer:
D
Explanation
Because you are attempting to find out about the offspring not the parents.
Consider that basilosaurus lived in the ocean, how has the environment of this location changed since basilosaurus lived?
Answer:
Explanation:
This is because basilosaurus lived in the aquatic region with it sturdy slippers and long body.There was change in the environment due to the shifting that occur to tectonic plates and marking a portion of the land to move to a higher altitude or block the inflow of water from being in the deserted place.
Why did the dinosaur extinction have a happy ending for us? PLEAASEE!!
Explanation:
because if they were still alive today then our species would be endangered
People who have leukemia, a cancer that affects white blood cells, are often given Cytarabine. This drug inhibits the synthesis of DNA. Which phase of the cell cycle is most affected by Cytarabine?
A
Interphase
B
Cytokinesis
C
Prophase
D
Anaphase
Answer:
I think interphase because fna synthesis happens within the s-phase of the cell cylce and 5he s phase is suring interphase and not mitosis
The phase of the cell cycle which is most affected by Cytarabine is the Interphase. Thus, the correct option is A.
What is the cell cycle?The cell cycle may be defined as the entire sequence of events happening from the end of one nuclear division to the beginning of the next. The entire cell cycle can be divided into two phases.
The InterphaseThe M-phase (division phase).As per the question, the drug Cytarabine inhibits the synthesis of DNA, it definitely inhibits the interphase of the cell cycle. This is because the synthesis of DNA occurs in the S-phase of the cell cycle which is a substage of the interphase.
Therefore, the interphase of the cell cycle must be affected by the drug Cytarabine. Thus, the correct option for this question is A.
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Alright, I’m begging someone for help plz
How does the attachment of spindle fibers differ between mitosis and meiosis I?
In mitosis, the spindle fibers from two poles attach to each chromosome but in meiosis I, the spindle fibers from only ONE pole attaches to the chromosome.
WHAT IS MITOSIS AND MEIOSIS?
Mitosis and meiosis are two kinds of cell divisions. Mitosis involves separation of a single parent cell to produce two genetically identical cells while meiosis involves the separation of a single parent cell to produce four genetically different daughter cells.WHAT IS SPINDLE FIBER?
Spindle fibers are structures that emanate from centrosome organelles and responsible for the separation of chromosomes during karyokinesis (nuclear division). During the two cellular divisions (mitosis and meiosis), spindle fibers attach to the centromeres of each chromosome in order to align and eventually divide them.However, in mitosis, spindle fibers from two opposite poles attach to each chromosome but in meiosis I, the spindle fibers from only ONE pole attaches to the chromosome.
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55 POINTS!! PLEASE HELP ME
Explanation:
1. granatic
2. basaltic
Answer:
1. B
2. A
Explanation:
T
A
A
C
G
C
A
G
What is the order of bases that will compliment this side of a DNA strand
Answer:
A, T, T, G, C, G, T, C
Explanation:
A becomes a T
T becomes a A
C becomes a G
G becomes a C
What do you think the primary_impacts (the first and most major effects) of the earthquake would
have been?
2 Although it was not one of the most powerful earthquakes that has ever taken place; a lot of people
died in the insident in Pakistan-administered Kashmir. What features of the area do you think might
have contributed to the high death rate?
3
Many international agencies and the British military were involved in the aid effort after the
earthquake. What kind of aid and assistance do you think the British military would have been
involved in providing?
Answer:
Hi friend
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Why is the timing of a mutation in relation to fertilization important in whether it can be passed onto offspring?
Answer:
Since all cells in our body contain DNA, there are lots of places for mutation to occur; however, some mutations cannot be passed on to the offspring and do not matter for evolution.
Explanation:
I hope this answers your question...
biology question below
Answer:
chromatin
Explanation:
Chromosomes are made up of a DNA-protein complex called chromatin that is organized into subunits called nucleosomes.
An energy pyramid shows the amount of available at each feeding level in an ecosystem.
Answer:
I don't know about it. which subject and which class is this
11 A scientist transfers a fragment of genetic material from one organism to
another organism of a different species. What is this process called?
F artificial selection
H genetic engineering
I asexual reproduction
G selective breeding
Answer:
H) Genteic Engineering
This is due today!
Alice and her friends looked at a bunch of ladybugs. They noticed the ladybugs had different numbers of spots. They each had different ideas about why the numbers of spots were different.
This is what they said: Which person do you agree with the most?
A) Karen: I think they must all be different species of ladybugs.
B)Troy: I think each ladybug has the same number of spots as its parents.
C)Isaac: I think it depends on the age of the ladybugs. As they get older they add more spots.
D)Fred: I think it has to do with the sex of the ladybug. Males will add more spots to compete for the females.
E) Andrea: I think it depends on what each ladybug was born with.
F) Alice: I think they change their number of spots when there is a need for them to do so.
Explain your thinking. Describe your ideas about why the ladybugs look different.
Why are DNA fingerprints are more reliable than hand fingerprints in solving crimes.
How can a change in structure to an organisms' cell negatively effect that organism?
Organisms under the taxonomic group Animalia are
A. sometimes multicellular autotrophs.
B. sometimes unicellular heterotrophs.
c. all multicellular heterotrophs.
D. all unicellular autotrophs.
Answer:
D
Explanation:
Animals:
Eukaryote
Multicellular
Consumer/Heterotroph
Sexual reproduction
Meiosis has
cell divisions, while mitosis only has?
what stores and delivers nutrients throughout the cell and transports waste to the cell membrane
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Vacuoles store water, food, and waste. The endoplasmic reticulum (ER) is a series of tunnels throughout the cytoplasm. They transport proteins from one part of the cell to another. Ribosomes are the protein factories of the cell.
Hope it helps uh...The organelle that is responsible for storing and transporting nutrients through the cells is Vacuoles.
Vacuoles are also know as storage containers, they act as a storage organ in the body. This storage organ helps to transport food substances /molecules in the cell. Vacuoles are composed of enzymes, they help to hold water an food molecules. Vacuoles also help to remove waste substances that are harmful to the body.
The vacuole helps to keep balance in the body as they help to keep useful molecules and also get rid of waste substances.
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What's the total number of different arrangements in dna molecule with 2 base pairs?
Answer:
23
Explanation:
need help on number 6
Answer:
CAG- GTG- GAC- TGA- GGA- CTT- CTC
Dna complementary strand would be
GTC- CAC- CTG- ACT- CCT- GAA- GAG
Mark brainiest, please
In the oldest fossils found in Bitter Springs (Cyanobacteria), why can we only find the remains of single celled organisms
Answer:
Due to presence at early days of the planet.
Explanation:
We only find the remains of single celled organisms in the oldest fossils because the single celled organisms are the organisms that were present in the early days of this planet. These single celled microbes were present about 3.7 billion years ago while on the other hand, the oldest rocks are only a little older i. e. 3.8 billion years so these single celled organisms are considered as oldest fossils on this planet.
need help asap
- 20 points , includes .
Answer:
D
Explanation:
Everything in there pollutes the environment.
Explain how spirogyra is also called green algae reproduces in water.
Answer: Spirogyras are filamentous green algae, named for their spiraling chloroplasts. Each cell of the filaments features a large central vacuole, within which the nucleus is suspended by fine strands of cytoplasm
Explanation:
A human cell that has 46 chromosomes would have __ daughter cells that each have __ chromosomes after mitosis.
Answer:
2 daughter cells, 46 chromosomes
Explanation:
Mitosis is reproduction of somatic cells, or body cells. It's end product will always be 2 daughter cells, each identical to one another, therefore meaning, it will also have the same number of chromosomes!
Answer: one daughter cells and each have 23
Explanation: mitosis is the first then meiosis
Which cell organelle is used to move fluid across the outside of the cell
membrane?
A.Chloroplast
B.Cytoplasm
C.Flagella
D.Cilia
Answer:
im going to say either c or d or both
Explanation:
sorry if im wrong
Answer:
b)cytoplasm is the one that moves the fluid.