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Sauron [17]
3 years ago
5

If you live on a river delta or coastline, you may not be able to eat the local shellfish because of high levels of toxins prese

nt in the water. Why?
Biology
1 answer:
ch4aika [34]3 years ago
3 0

Answer: Shell fish is used as a biological indicator of pollution.

Explanation:

The clams, mussels and shellfishes are some of the organism which can be used as a biological indicator of the pollution.

This is so because they have the ability to filter and concentrate the pollutants such as pesticides, and other pollutants in water.

These organisms can be toxic to people as it includes pollutants. This can be a early warning that the nearby water is getting highly polluted.

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A large asteroid impact occurs, kicking up dust that blocks the Sun and prevents plants from photosynthesizing. What would most
snow_lady [41]

Answer:

Many species would eventually die off because they lack a food source.

Explanation:

<u>Photosynthesis can be defined simply as the biological process of using light to synthesize food (in the form of glucose). It is a process that takes place in plants and involves the synthesis of sugar using inorganic products such as water and carbon dioxide.</u>

6CO_2 + 6H_20 + (energy) → C_6H_1_2O_6 + 6O_2

The process consists of two stages namely;

  • Light reaction
  • Light independent reaction.

The products from the light reaction are utilized in the light-independent reaction.

<em>Hence, without light energy, the process of photosynthesis cannot proceed and plants will not be able to manufacture foods. Without foods, many plant species would die off. </em>

7 0
3 years ago
Pls !<br> Help!<br> How does the length of interphase compare to the length of cell division?
miv72 [106K]

Answer:

Usually, cells will take between 5 and 6 hours to complete S phase. G2 is shorter, lasting only 3 to 4 hours in most cells. In sum, then, interphase generally takes between 18 and 20 hours. Mitosis, during which the cell makes preparations for and completes cell division only takes about 2 hours.

Explanation:

7 0
3 years ago
LO NECESITO URGENTEMENTE, PORFAVOR AYUDENME INSTRUCCIONES: lee el siguiente texto y completa las ideas con las siguientes palabr
Andre45 [30]

Answer:

La reproducción sexual consisten en la unión de dos gametos uno femenino y otro masculino, para formar un nuevo individuo con características provenientes de ambos progenitores. Los gametos son células especializadas que se forman por un proceso meiótico y tienen en su núcleo la mitad de la información genética de un organismo, por lo que reciben el nombre de células haploides de manera que cuando se une sus cromosomas se forman células diploides característico de la especie. La característica más importante de este tipo de reproducción es la variación genética que implica que los descendientes tengan características de sus dos progenitores, por lo que son diferentes a ellos. El proceso en el que se une las células sexuales se le conoce como fecundación. En los animales esta pude ser interna o externa.

Explanation:

Los gametos (óvulos y espermatozoides) son células germinales especializadas que se desarrollan a partir de un proceso llamado gametogénesis (espermatogénesis en machos y ovogénesis en hembras). El proceso de gametogénesis implica un tipo de división celular llamado 'meiosis' donde la cantidad de cromosomas se reduce a la mitad. En humanos, el número cromosómico diploide (2n) de 46 cromosomas se reduce a un número haploide (n) de 23 cromosomas. La fecundación es el proceso por el cual los gametos se fusionan durante la reproducción sexual para producir un cigoto diploide. En la reproducción sexual, el aumento de la variación genética en la progenie es un resultado de tres procesos diferentes: la unión aleatoria entre gametos durante la fecundación, la distribución independiente de los cromosomas durante la gametogénesis y el entrecruzamiento (recombinación o crossing over) entre cromátidas de cromosomas homólogos durante la meiosis. Finalmente, en animales, la fecundación puede ser interna, la cual se produce mediante la unión de los gametos dentro del cuerpo de la hembra (por ejemplo, gallina, leona, cebra, etc.), o fecundación externa, donde la fusión de gametos se produce en el ambiente externo (por ejemplo en peces, sapos, ranas, etc.).

6 0
3 years ago
What is the definition of oceanography?
kenny6666 [7]
Hi there!

The definition of Oceanography is -

The study of the Ocean.

Hope this helps!

~Alexa
6 0
3 years ago
which is true ? A.All organisms obtain water through food B.some substances must be dissolved in water before they can be used C
tankabanditka [31]
B. some substances must be dissolved in water before they can be used
6 0
3 years ago
Read 2 more answers
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