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Temka [501]
3 years ago
8

WILL PICK BRANLIEST!! EACH ONE IS ONE OF THE FOUR CHOICES ON THE BOTTOM

Biology
1 answer:
lilavasa [31]3 years ago
8 0

prophase I : homologous chromosomes are paired

metaphase I : the centrosome replicates

anaphase I: homologous chromosomes are separated

telophase I : nuclear envelopes form around separated chromosomes

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Q40.is a proposed explanation for an observation.
Tcecarenko [31]

Answer:

C. Hypothesis

Explanation:

Hypothesis is a proposed explanation for a certain occurrence and when the explanation is conclusive, then it becomes a theory.

3 0
2 years ago
Si una población crece mucho otra vez después de un cuello de botella con el paso del tiempo aumentará diversidad genética ¿por
sammy [17]

Answer:

los mecanismos capaces de generar diversidad actúan para incrementar la variabilidad genética en la población que sufrió el cuello de botella

Explanation:

Un cuello de botella se refiere a una reducción drástica en el tamaño de una población (por ejemplo, debido a una catástrofe natural). Un cuello de botella es un fenómeno que está asociado a la ​reducción en la variación genética y fijación de ciertos alelos en la población resultante, lo cual es causado por la deriva genética, es decir, debido al muestreo al azar de los individuos que formarán la población en la siguiente generación. Paulatinamente, los mecanismos capaces de generar variabilidad genética aumentarán nuevamente la diversidad de la población que sufrió el cuello de botella. En una población de reproducción sexual, la variación genética se genera mediante cuatro procesos diferentes: 1-mutación (es decir, la aparición de nuevos alelos debido a alteraciones en la secuencia de ADN); 2-recombinación (es decir, el intercambio de información genética entre cromátidas no hermanas durante la meiosis); 3-segregación independiente de cromosomas durante la meiosis (capaz de producir nuevas combinaciones de alelos) y 4-fertilización al azar (lo cual también incrementa el número de combinaciones entre gametos que darán lugar a un nuevo individuo).

4 0
2 years ago
Using no more than 14 propositions, list the functions, structure, and distribution of the lymphatic vessels and describe the me
sveticcg [70]

The lymphatic vessels are thin-walled valvular structures, composed of lymphangions, which carry the lymph from the tissues, via the lymph nodes, to the bloodstream. For this reason, they are analogous to veins and venules.

The lymphatic network is present throughout the body with the exception of the central nervous system and non-vascularized tissues.

It is separated in two circuits: one for the upper right quarter of the body, and one for the rest.

The lymphatic channels join together to form lymphatic vessels more and more voluminous.

Finally, The lymph is drained by two large collectors:

* The right lymphatic canal

* The thoracic duct.

All lymphatics thus end up in the upper vena cava system by two separate circuits.

8 0
2 years ago
Which nutrient can supply the body with energy? quizlet
MrRa [10]

Answer:

Carbohydrates

Explanation:

hope it helps

7 0
2 years ago
Regis, a 6-year-old, can correctly name objects, catch a ball and throw it, and write his abcs in proper sequence. his younger b
andre [41]
Hello, sorry this is a little late.

I believe the correct answer to your question would be "Regis' brain has experienced greater myelination than Mark's."

I hope this helps, and have a great day :)
8 0
3 years ago
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