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jeka57 [31]
3 years ago
8

I’m stuck please help!

Biology
2 answers:
sergejj [24]3 years ago
7 0

Answer:

A nucleus. Prokaryotes have no nucleus, thier genetic material is free floating in the cytoplasm

Klio2033 [76]3 years ago
6 0

Answer:

Nucleus (C)

Explanation:

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¿Qué evidencias ocurrieron en el medio ambiente que llevaron a la evolución de un ojo complejo a partir de una versión más simpl
VLD [36.1K]

Answer:

- Evidencia: registro fósil

- Función: capacidad de distinguir depredadores  

Explanation:

Un ojo compuesto es una órgano sensorial altamente especializado compuesto por unas estructuras conocidas como omatidios, las cuales están a su vez compuestas por células fotorreceptoras. La superficie externa de un omatidio es una lente hexagonal, debajo de la cual se encuentra una lente cónica capaz de captar la onda lumínica. La evidencia más importante de animales con ojos complejos que habitaron el planeta hace millones de años fue el descubrimiento de un ojo fosilizado en un crustáceo (aprox. 515 millones de años atrás). El ojo de este animal estaba compuesto por miles de lentes. Interesantemente, las lentes del centro del ojo compuesto se destacaban por su mayor sensibilidad, lo cual se cree le conferían a este crustáceo la habilidad de distinguir mejor estructuras y formas en ambientes oscuros. En consecuencia, este descubrimiento soporta la idea de la evolución temprana de la vista como una característica fundamental que le habría conferido a una especie de crustáceo la posibilidad de distinguir fácilmente a sus depredadores.

3 0
3 years ago
What is the history of species of the Galapagos Islands?
Len [333]
The species history of the Galapagos Islands is mainly talking about the birds finches that is discovered by Charles Darwin and is said to have 13 different bird species that have different size and structure of finches for their kind of living on how these birds are to gather their food to eat and survive
5 0
3 years ago
does mold produce a toxin to kill bacteria? Or does mold prevent the growth of bacteria on a petri dish?
marin [14]
It produces a toxin to kill bacteria
5 0
3 years ago
Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains 5 liters of natural oil for every 3 liters of
ELEN [110]

Answer:

Total 495 liters of natural oil are needed.

Explanation:

It is given that Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains 5 liters of natural oil for every 3 liters of synthetic oil.

It means the ratio of natural oil and synthetic oil is

\frac{\text{Natural oil}}{\text{Petrolyn motor oil}}=\frac{5}{5+3}=\frac{5}{8}

Let in order to make 792 liters of Petrolyn oil he needs x liters of natural oil.

It means the ratio of natural oil and synthetic oil is

\frac{\text{Natural oil}}{\text{Petrolyn motor oil}}=\frac{x}{792}

Equate both ratios,

\frac{x}{792}=\frac{5}{8}

On cross multiplication we get

8\times x=5\times 792

8x=3960

Divide both sides by 8.

x=\frac{3960}{8}

x=495

Therefore total 495 liters of natural oil are needed.

6 0
3 years ago
1.what is an unintended consequence of using cardboard to cover the grass?
Serga [27]
1- the grass dies due to lack of food, from lack of photosynthesis from lack of sunlight 
2- you danger the enviroment 
6 0
3 years ago
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