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pshichka [43]
3 years ago
5

What structure in the heart keeps the blood from flowing in the right direction?

Biology
2 answers:
ASHA 777 [7]3 years ago
6 0

Answer:

The valves The heart has four valves - one for each chamber of the heart. The valves keep blood moving through the heart in the right direction.

Explanation:

it is right hope this helps

Novosadov [1.4K]3 years ago
5 0

Answer:

The answer is The valves The heart has four valves - one for each chamber of the heart. The valves keep blood moving through the heart in the right direction.

Explanation:

i hope i helped you very much

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How many codons equals 1 amino acid?
kondaur [170]

Answer:

Explanation: The nucleotide triplet that encodes an amino acid is called a codon. Each group of three nucleotides encodes one amino acid. Since there are 64 combinations of 4 nucleotides taken three at a time and only 20 amino acids, the code is degenerate (more than one codon per amino acid, in most cases)

6 0
3 years ago
A major point of understanding natural selection is that not all organisms in a
fomenos

Answer:

Fitness enable organism to survive in the particular environment.

Explanation:

Fitness of organisms is the characteristics which able the organisms to survive in harsh environmental condition and in the process of natural selection. Organisms which are better suited to their environment will survive and reproduce in that particular environment which leads to increase in the population of the organisms. Organisms having more fitness have more chances to survive in that environment whereas those organisms having lower fitness, can't survive and removed from that environment.

5 0
3 years ago
Plzzzzz help
Levart [38]

The scientific method includes the problem statement, previous knowledge, hypothesis and goals, methodology, results, and discusion/conclusion. The correct option is C.  form a <u><em>conclusion.</em></u>

----------------

The scientific method is a research method that consists of s<em>ystematic observations, measures, experimentation, analysis, and verification of a hypothesis.</em> It is based on reproducibility and refutability.  

When conducting an experiment, you need to consider,

Definition and problem statement. The question for which there is not an answer yet. A question the investigator wants to answer.

Theoretical framework. Antecedents from other investigations. Previous knowledge about the study object is always required for a better understanding.

The main goal of the study is basically what the investigator wants to find out.

Hypothesis formulation. The researcher makes a hypothesis to predict or make a conjecture -not verified and which requires corroboration- about what is going on or expected to happen.  

Identification of the study groups, involved variables -independent, dependent, and control-.

Methodology description. Steps needed to get data.

Results. It includes data statistical analysis. This step involves testing the observations.

Discussion and Conclusion, through which the hypothesis might be rejected or accepted.

In the exposed example, the researcher has already collected field data, and made analysis.

Probably, the marine biologist noticed, while analyzing the results, that turtles lay eggs from May to October. But there might have been a biotic or abiotic factor threatening the survival of the eggs during august.  

According to the analysis the researcher concluded that the <em>nest season</em><em> involves monthes between may and october, and august turns to be the most</em><em> critical month </em><em>for nesting. </em>

<em />

<em>The correct option is C. </em>

<em />

<em>-----------------------------------------------</em>

<em />

<em>You can learn more about </em><em>Scientific Method </em><em>at</em>

<em>brainly.com/question/7508826</em>

<em />

4 0
3 years ago
Why is heartwood darker in color than sapwood?
andrey2020 [161]
A it is closer to the heart
6 0
3 years ago
True or false: Sex cells are haploid because they only contain one set of unpaired chromosomes.
patriot [66]

Answer:

true

Explanation:

remember- Haploid it sounds like half, so when you think of half, always think of sex chromosomes.  23 chrom.

   diploid- well its the other one so yeah  46 chrom.

4 0
3 years ago
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