1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nuetrik [128]
3 years ago
9

How does blood enter and exit the heart?

Biology
2 answers:
Irina-Kira [14]3 years ago
8 0
Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. ... As the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated
Naily [24]3 years ago
5 0
Super vena cava
Inferior vena cava
Right atrium
Tricuspid valve
Right ventricle
Pulmonic valve
Pulmonary artery
Lungs
Pulmonary vein
Left atrium
Bicuspid valve
Left ventricle
Aortic valve
Aorta
Rest of the body
You might be interested in
Let P = purple flowers and p = white, and T = tall plants and t = dwarf. What combinations of gametes could be produced by a het
kirill [66]

Answer:

The combinations of gametes that could be produced from heterozygous individuals for both traits are PT, Pt, pT and pt.

Explanation:

An individual is heterozygous for two traits, flower color and stem height, with a PpTt (dihybrid) genotype and a phenotype showing the dominant traits, purple flowers and tall stem.

The genes of this individual for the above-mentioned traits contain different alleles, and taking into account the independent segregation of characters, the alleles present in its gametes could be:

  • <em>Both dominant alleles: PT </em>
  • <em>One dominant and one recessive allele Pt or pT </em>
  • <em>Both recessive alleles: pt </em>

Therefore, the traits of its offspring will depend on the alleles for those traits present in the gamete to which they are combined.

6 0
3 years ago
Why are fences put along some beaches ?
kvv77 [185]

The answer is; B

Sometimes winds carry the sand of the beaches causing erosion. The fences act as breakers of this wind erosion. As wind tries to carry the sand, they encounter the fence and 'break'. Therefore, the sand is deposited along the fence forming a sand dune. These dunes also form protection from storm surges.

6 0
3 years ago
4. What type of charge does a<br> proton have?
DedPeter [7]

Answer: Positive charge of 1

Explanation: This is because it is believed that it is from the charge of the quarks that make up the nucleons which are protons and neutrons.

8 0
3 years ago
Read 2 more answers
En un cruce entre peces naranjas y peces grises se obtiene una generación (f1) de 50% peces grises . Realice el cruce y explique
Ilya [14]

Answer:

Uno de los progenitores es heterocigoto para color naranja (Nn) y el otro parental es homocigoto recesivo para gris (nn). Al haber una cruza entre un homocigoto recesivo y un heterocigoto, la 50% de la progenie expresa color naranja (Nn), mientras que el otro 50% expresa color gris (nn).

Explanation:

<u>Datos disponibles:</u>

  • Cruce entre peces naranjas y peces grises
  • 50% de la F1 son peces grises
  • Naranja dominante sobre gris

Podemos nombrar el alelo dominante para color naranja <em>N</em>, y al alelo recesivo  para color gris <em>n</em>.

Para que en un cruce entre dos fenotipos distintos, el 50% de la primer camada exprese uno de estos fenotipos, entonces uno de los parentales debe ser heterocigoto, mientras que el otro parental debe ser homocigoto recesivo. De esta forma 50% de la primera generación expresara uno de los fenotipos, mientras que el otro 50% expresará el otro fenotipo.

Supongamos que uno de los parentales lleva el genotipo <em>Nn</em>, y el otro parental es <em>nn</em>.

Cruce:

Parental)      Nn    x     nn

Gametas)   N    n       n    n

Fenotipos) Naranja     Gris

Cuadro de Punnett)      N           n

                            n       Nn         nn

                            n       Nn         nn

F1)  2/4 = 1/2 = 50% de la progenie tendrá genotipo heterocigoto, Nn

     2/4 = 1/2 = 50% de la progenie tendrá genotipo homocigota recesivo,    

     nn

     50% de la progenie será color naranja (Nn)

     50% de la progenie será color gris (nn)

               

3 0
3 years ago
How does autotroph get its food?
Anon25 [30]
It makes it own food that why its called an AUTOtroph
4 0
3 years ago
Other questions:
  • Which of the following can be said about the use of agriculture?
    6·2 answers
  • Describe the differences in the way the sand castle is changed by an ocean wave and by Dylan stomping on it
    11·1 answer
  • Ecology - Describe how environmental changes may produce behavioral, physiological, morphological, or adaptive responses in orga
    10·1 answer
  • The notrogen cycle could not exist without what?​
    14·1 answer
  • The combined observations of Mattias Schleiden, Theodor Schwann and Rudolph Virchow resulted in the formation of the cell theory
    7·1 answer
  • How can invasive species alter an ecosystems food web?
    13·1 answer
  • Every HIV particle contains two RNA molecules. If two genes from one RNA moleculebecome detached and then, as a unit, get attach
    13·1 answer
  • Farmers are excited to learn that scientists have discovered that if the Proton Pyrophosphatase pump is in an area where the con
    7·2 answers
  • What is the energy transformation of a flashlight?
    6·1 answer
  • Which statements describe incomplete dominance? Select three options.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!