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mars1129 [50]
3 years ago
6

Why does the heart need so many parts?

Biology
1 answer:
Hunter-Best [27]3 years ago
5 0
Each part of the heart is responsible for a certian aspect of how you live-- your blood (pumped through your heart) oxygenates your blood, and ensures that has the nutrients you need to survive. It also carries away waste.  Without each of these intricate pieces, you wouldn't be able to survive.
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For an organism to be considered to have the greatest level of fitness
Assoli18 [71]

Answer:

b

Explanation:

it must survive to reproduce

4 0
3 years ago
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when you perform a dihybrid cross with two heterozygous individuals for the two traits, what is the expected phenotypic ratio?
Sergeu [11.5K]

Answer:

9:3:3:1

Explanation:

A dihybrid cross tracks two traits. Both parents are heterozygous, and one allele for each trait exhibits complete dominance *. This means that both parents have recessive alleles, but exhibit the dominant phenotype. The phenotype ratio predicted for dihybrid cross is 9:3:3:1. (There's a calculator on google that show the outcomes just to let ya know) hope it's correct .

8 0
3 years ago
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The process of phagocytosis involve all of the following except
evablogger [386]

Hello, I figured your question was missing its options so I went online to find them. Here they are:

The process of phagocytosis involves all of the following EXCEPT :

a. adhesion.

b. secretion of cytotoxins.

c. elimination.

d. vesicle fusion.

e. chemotaxis.

Answer:

The correct answer is: b) secretion of cytotoxins.

Explanation:

Phagocytosis is a mechanism performed by cells in which the plasma membrane engulfs a large particle. Phagocytosis is used by cells in the immune system to ingest pathogens like viruses and bacteria.

Phagocytosis consists of many steps:

  1. activation - the phagocytes that were resting are activated in the inflammatory response when a pathogen enters the body.
  2. chemotaxis  - this refers to the process in which the phagocyte moves to the pathogen by following the chemical factors released by these germs.
  3. adhesion - the phagocyte attaches to the pathogen.
  4. ingestion /vesicle fusion - the phagocyte sends pseudopods to engulf the pathogen, and places it in a phagosome, which is an endocytic vesicle. The phagosome and the phagocyte will fuse so the pathogen gets inside.
  5. elimination - the pathogen is destroyed in the phagocyte by the lysosomes present in it.

<u>The</u><u> secretion of cytotoxins</u><u> is not a part of the phagocytosis, and is a process exclusive to </u><u>T cells</u><u> (leukocytes that lack the ability to phagocyte).</u>

5 0
3 years ago
As a result of the Human Genome Project, a gene map of the entire human genome was produced. A gene map shows
kirza4 [7]

Answer:

A gene map shows how the chromosomes of genes are arranged in a particular space. This allows the researcher to know how certain traits can be inherited based on the pattern they show.

Explanation:

Gene maps may be generated through: <em>physical mapping or genetic mapping. </em>Physical mapping uses the technique of molecular biology while genetic mapping utilizes genes.

This can also be used to identify disease genes, since these are caused by abnormalities in the human's genome. It allows analysis in order to identify or predict what causes mutation.

So, this explains the answer.

3 0
3 years ago
About how many typical amino acids are found in proteins?
rosijanka [135]

Answer:

B probably I think but I'm not sure

3 0
3 years ago
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