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Lena [83]
3 years ago
8

What evidence links echinoderms, hemichordates and chordates to the same evolutionary lineage?

Biology
1 answer:
sleet_krkn [62]3 years ago
5 0

Answer:

Embryological evidence

Explanation:

Deuterostomes is a group that includes echinoderms, hemichordates, and chordates. Although these animals exhibit a wide variety of body plans, they share a mouth secondarily formed during embryo development, which it is believed to be an evolutionarily derived character present between a common ancestor and all its descendants (i.e., a synapomorphy). This oral cavity is formed by the invagination of the ectoderm layer opposite to the blastopore of the gastrula.

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Which diagram below shows DNA from a haploid nucleus
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Please pay attention in class next time but I will explain a haploid has one pair of chromosomes while diploids have two pairs
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3 years ago
Which part of the microscope supports both the ocular lens and the revolving nosepiece?
ycow [4]

The part of the microscope that supports both the ocular lens and the revolving nosepiece is called the <u>head.</u>

The microscope is a device that is used to examine smaller-sized objects that can not be seen with bare eyes.

The most commonly used microscopic devices are the electron microscope and light microscope.

Due to its high resolving power and powerful lenses, it can see small objects of sizes ranging between 10^-3 millimeters and 0.2 micrometers.

Moreover, it is used to see objects at uni and multi-cellular level allowing the scientists to observe organelles such as mitochondria and nuclei in a cell.

If you need to learn more about microscopes click here:

brainly.com/question/820911

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3 0
1 year 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
3 years ago
Which statement(s) is(are) likely to be true about this cell?
Olin [163]

Answer:

B

Explanation:

As there are lots of mitochondria within the diagram it is very unlikely that diffusion occurs. only active transport occurs. cells within the root do not look like the diagram shown thus the statement I and IV are true.

5 0
3 years ago
Which characteristic can be inherited?
Ket [755]
A should be it, its because if your parents had long toes ,itll be passed down to you

5 0
4 years ago
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