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Blababa [14]
3 years ago
8

Why are enzymes important to cells? they help bring about chemical reactions. they store large quantities of energy. they provid

e structural support. they form the two layers of membranes. description?
Biology
2 answers:
Paladinen [302]3 years ago
8 0
They help bring about chemical reactions
densk [106]3 years ago
4 0

they help bring about chemical reactions

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What is periderm and protoderm and where do they originate from in a new plant ?
Sati [7]
Periderm is the corky outer layer of a plant stem which the plant creates as a result of an injury or infection so as to protect itself further. Protoderm is the thin layer which covers embryos, as well as the root and stems, and later produces epidermis, which is the outer layer of tissue of plants (anywhere where periderm doesn't cover them).
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The women marries a man with alleles Bb for eye color what color eyes does the man have
Inga [223]
Brown because Bb or BB represents brown eyes while bb represents blue eyes
5 0
3 years ago
At which type of tectonic plate boundary is a volcano least likely to occur?
Arlecino [84]

Answer:

Hotspot

Explanation:

Volcanoes can form in three different places: a convergent boundary, a divergent boundary, or a hot spot.

-At a convergent plate boundary, two plates collide and form a subduction zone. In the subduction zone, the denser, heavier plate goes below the more buoyant plate. The plate that goes under is subjected to immense heat and pressure and melts to form magma. This magma is less dense than the surrounding solid rock and rises to the surface through cracks in the plates to form a volcano.

- Volcanoes will form along divergent plate boundaries. A divergent boundary is when the plates move apart from each other. When the plates part, magma from under either plate rises and forms a volcano.

-A hotspot is the third place a volcano can form. This particular type is the least common. Hot spots are when thermal plumes from deep in the Earth rises. This heat, combined with the lower pressure at the bottom of the lithosphere, causes magma to form. The magma, as we discussed, is less dense than the surrounding solid crust and rises to the surface through cracks and channels and then erupts at the surface to form a volcano.

6 0
3 years ago
A brief contraction of all muscle fibers in a motor unit in response to a single action potential moving down the somatic motor
ad-work [718]

Answer:

Muscular tissue

7 0
3 years ago
Una raza de gallinas, denominada andaluza, presenta plumajes de tres colores negro, blanco y azul. El azul resulta de la combina
Anna007 [38]

Answer:

a) Genotipo: 50% = 1/2 Nn    -     Fenotipo: 50% = 1/2 Plumaje Azul

                     50% = 1/2 NN   -                       50% = 1/2 Plumaje Negro

b) Genotipo: 50% = 2/4 = 1/2 Nn    -     Fenotipo: 50% = 1/2 Plumaje Azul

                     25% = 1/4 NN                                    25% = 1/4 Plumaje Negro

                     25% = 1/4 nn                                     25% = 1/4 Plumaje Blanco

c) Genotipo:  50% = 1/2 Nn    -     Fenotipo: 50% = 1/2 Plumaje Azul

                     50% = 1/2 nn   -                       50% = 1/2 Plumaje Blanco

Explanation:

Datos:

Llamaremos al Gen para color del plumaje: N

Alelo dominante N para color negro

Alelo recesivo n para color blanco

Animales con genotipo homocigota para alelo dominante, NN, expresan plumaje negro

Animales con genotipo homocigota recesivo, nn, expresan plumaje blanco

Animales con genotipo heterozigota, Nn, expresan color azul.

Este es un ejemplo de dominancia incompleta, en la cual ninguno de los dos alelos domina completamente al otro. El alelo dominante, en este caso N, no puede cubrir el efecto del alelo recesivo, n. Los desendientes, entonces, poseen un fenotipo intermedio entre los dos fenotipos parentales, que en este caso es el color azul en el plumaje.

Entonces:

a) Plumaje azul x plumaje negro.

Parental) Nn   x   NN

Gametas) N   n   N   N

Cuadrado de Punnet)   N        n

                             N     NN     Nn

                             N     NN     Nn

F1) 1/2 de la progenie es homocigota dominante, NN, color negro

     1/2 de la progenie es heterocigota, Nn, con plumaje color azul

b) Plumaje azul x plumaje azul.

Parental) Nn   x   Nn

Gametas) N   n   N   n

Cuadrado de Punnet)   N        n

                             N      NN     Nn

                             n      Nn      nn

F1) 1/4 de la progenie es homocigota dominante, NN, color negro

     2/4=1/2 de la progenie es heterocigota, Nn, con plumaje color azul

     1/4 de la progenie es homocigota recesivo, nn, con plumaje blanco

c) Plumaje azul x plumaje blanco

Parental) Nn   x   nn

Gametas) N   n   n   n

Cuadrado de Punnet)   N         n

                             n      Nn        nn

                             n      Nn        nn

F1)  1/2 de la progenie es homocigota recesivo, nn, color blanco

     1/2 de la progenie es heterocigota, Nn, con plumaje color azul

4 0
3 years ago
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