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Rashid [163]
3 years ago
6

DOES ANYONE HERE UNDERSTAND PLATE TECTONICS, BECASUE I DONT AND I NEED HELP ASAP, PLEASE HELP ME PLEASE!!!!!

Biology
1 answer:
Ksenya-84 [330]3 years ago
4 0

I will help u ask the question and I will help u if u need help asap

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¿Por qué la aparición de la comunicación celular fue un paso clave en la evolución de los organismos multicelulares?
Deffense [45]

Answer:La transición de formas de vida unicelulares a multicelulares ha ocurrido en más de una ocasión a lo largo de la evolución. Las plantas, las algas marrones, los hongos y los animales han adquirido estilos de vida multicelulares de forma independiente y convergente.

La aparición de los animales representó un paso evolutivo clave en la historia de la vida. El desarrollo embrionario y todas las funciones que requiere la vida multicelular se hallan conservados en todos los animales, desde las esponjas a los humanos.

La secuenciación de los genomas de las especies unicelulares más cercanas a los animales ha revelado que estas ya contenían muchos de los genes necesarios para la multicelularidad. Estos habrían sido reutilizados para nuevas funciones multicelulares en el ancestro común de todos los animales.

Explanation:

7 0
3 years ago
Sickle cell anaemia is an inherited autosomal recessive
alekssr [168]

Answer:

1/8 (12.5%)

Explanation:

An autosomal recessive disease is an inherited disease in which an individual need to receive both defective alleles at the same gene <em>locus</em> to be expressed in the phenotype. In this case, both parents are carriers of the recessive mutant allele associated with the sickle cell anaemia trait, thereby both parents are heterozygous, ie., each parent has one copy of the normal allele 'H' and one copy of the defective mutant allele 'h' associated with this condition. In consequence, their first child has a 1/4 (25%) chance of having sickle-cell anaemia. Moreover, the chance of having a girl is 1/2 and the chance of having a boy is 1/2, thereby the final chance of having a girl sickle cell anaemia individual is 1/4 x 1/2 = 1/8 (12.5%).

- Parental cross for sickle cell anaemia trait = Hh x Hh >>

- F1 = 1/4 HH (normal); 1/2 Hh (normal); 1/4 hh (sickle cell anaemia) >>  

- Sex proportion of sickle cell anaemia individuals =  1/8 female sickle cell anaemia individuals + 1/8 male sickle cell anaemia individuals (1/8 + 1/8 = 1/4)

3 0
3 years ago
Lenny came face-to-face with a young bear while hiking in the sierra nevada mountains. his sensory input traveled to his cerebra
DaniilM [7]

The sensory input initiated from the spinal cord before reaching to the brain . The information firstly goes to first order neuron where it receives impulses from skin and then transferred to the spinal cord.

Some sensory pathways consists of chain of neuron that transfer from receptor organ then to cerebral cortex that is responsible the perception of sensations. Sensory input is converted into electrical signals are known as nerve impulse.

This nerve impulse are transmitted into into brain. The correct order is Receptors - Sensory neuron- Spinal cord - Motor neuron- Muscle.

Impulse are the strong desire to act or that causes something to happen or happen more quickly.

To learn more about impulse here

brainly.com/question/16980676

#SPJ4

7 0
1 year ago
The presence of an appropriate enzyme affects only the __________.
iVinArrow [24]

Answer;

-The rate of the reaction;

The presence of an enzyme affects only the rate of the reaction.

Explanation;

-Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.

-Additionally, the rate of a chemical reaction increases as the substrate concentration increases. Enzymes can greatly speed up the rate of a reaction. However, enzymes become saturated when the substrate concentration is high.


4 0
3 years ago
What is typically studied when analyzing not-yet-born (or unhatched) animals? (1 point)
TiliK225 [7]
This would be an example of embryological development.
3 0
3 years ago
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