"REAL ANSWERS ONLY" BRAINLIEST Which competition is direct and interspecific?(1 point)

a fern and maple tree seedling competing for sunlight

peacocks attracting a mate

birch tree seedlings competing for sunlight

a hyena and cheetah fighting over a carcass

Suppose the mosquito population in an area increases. Which organism may also experience a population increase?(1 point)

bats

squirrels

rabbits

deer

A mutation is any(1 point)

change in the amino acid sequence.

change in the DNA sequence that leads to an advantageous outcome.

change in the DNA sequence.

change in the DNA sequence that leads to a disadvantageous outcome.

Why is genetic variation among individuals beneficial?(1 point)

Genetic variation leads to more new traits in the population which means evolution can occur faster.

More genetic variation means higher rate of survival versus species that have less genetic variation.

Genetic variation staves off extinction because it creates a fit population.

Some individuals will have inherited traits that give them a competitive advantage that make them more likely to survive and reproduce.

What is the term used to describe having a trait that can be passed on to subsequent generations that increases the organism’s ability to survive in its environment and reproduce?(1 point)

natural selection

adaptation

fitness

genetic variation

What is the term used for genetic mutations that may result in neutral or even negative outcomes?(1 point)

genetic drift

artificial selection

genetic modification

natural selection

How are genetic modification and artificial selection similar?(1 point)

Both involve hybridization.

Both result from human influences.

Both result from natural selection.

Both involve crossbreeding.

The “great dying,” which saw 96% of all species extinct, was partially caused by(1 point)

an asteroid impact.

bacteria producing large amounts of toxic methane.

algae consuming too much oxygen from the ocean.

lower levels of carbon dioxide in the air.

Which situation is an example of altruistic behavior?(1 point)

A child shares an apple.

A child eats an apple.

A child throws away an apple.

A child steals an apple.

1) B

2) A

3) C

4) C

5) A

6) A

7) B

8) A

9) D

Explanation:

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

transcription is a process in which information is rewritten. it is something our cells must do, in a more specialized and narrowly defined way. in biology, transcription is the process of copying out the dna sequence of a gene in the similar alphabet of rna. it needs to happen in the nucleus because that's where the dna is. dna is always inside the nucleus unless the cell is dividing.

transcription is the first step in gene expression, which involves copying a gene's dna sequence to make an rna molecule. transcription is performed by rna polymerases. it has three stages: initiation, elongation, and termination. rna molecules must be processed after transcription in eukaryotes.

explanation:

long version:

the protein synthesis consists two processes which are, transcription and translation. transcription takes place in the nucleus. it uses dna as a template to make an rna molecule. rna then leaves the nucleus and goes to a ribosome in the cytoplasm, where translation occurs. transcription is the first part of the central dogma of molecular biology: dna → rna. it is the transfer of genetic instructions in dna to messenger rna (mrna). during transcription, a strand of mrna is made that is complementary to a strand of dna.  

these three stages are:

  initiation: in which   is the beginning of transcription.occuring when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

    elongation: in which is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

    termination: in which is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.