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GrogVix [38]
3 years ago
10

Fossils reveal that __ are the fish organisms with bony skeletons.

Biology
1 answer:
torisob [31]3 years ago
6 0

Answer: The main skeletal element is the vertebral column, composed of articulating vertebrae which are lightweight yet strong.

Explanation:

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The bacteria have an initial concentration of 1000 cells/cm3 . Each cell divides once every 30 minutes. Calculate how long it wi
Levart [38]

It will take <u>120 minutes</u> for the concentration to become > 15000 cells/cm³

<u>Given data:</u>

Initial concentration ( density ) = 1000 cells / cm³

Target/final concentration = > 15,000 cells /cm³

<h3 /><h3>Calculating the concentration every 30 minutes </h3><h3 />

<em>note</em><em> : Given that each cell divides every 30 minutes </em>

  • <u>After the first 30 minutes </u>

Concentration = 2000 cells / cm³

  • <u>After 60 minutes </u>

concentration = 4000 cells / cm³

  • <u>After 90 minutes </u>

concentration = 8000 cells / cm³

  • <u>After 120 minutes </u>

concentration = 16000 cells / cm³

Therefore after 120 minutes the concentration of the cells will be greater than 15000 cells/cm³ ( i.e. 16000 cells/cm³ )

Learn more about concentration : brainly.com/question/17206790

4 0
2 years ago
The chromosomes are arranged in their respective _________________________________ pairs. In humans, this displays 22 pairs of _
Tasya [4]

Answer:

The chromosomes are arranged in their respective homologous  pairs. In humans, this displays 22 pairs of autosomes and 1 pair of sex chromosome.

Explanation:

Chromosomes that are similar in their size and shape and also display similar genetic traits and carry the same genetic information are paired together. These are known as homologous chromosomes. These chromosomes carry different variations of similar genes in them. In humans there are 46 chromosomes in total. These chromosomes are paired and form 23 homologous pairs. Among these 23 homologous pairs, 22 pairs are autosomes and one pair are the sex chromosomes which are either (XX or XY). The sex chromosomes determine the sex of an individual. XX chromosomes represent a female and XY chromosomes represent a male.

Learn more about autosomes here:

brainly.com/question/19426394

#SPJ4

7 0
1 year ago
Which of the three primary germ layers generates most of the cells in the developing mammalian forelimb? which germ layer genera
almond37 [142]
Germ layer is a primary layer of cells found in the embryo. The three primary germ layers that generate most of the cells in the developing mammalian forelimb are ectoderm, mesoderm and endoderm.
Ectoderm forms the outer component of a mammalian body such as skin, hair, etc. Endoderm forms the inner layer that comprises of the linings of digestive system, lungs and thyroid. Mesoderm is the middle layer that forms the skeletal system, heart, etc.
Neural tube is generated by the inward folding of the ectoderm. This process is called neurulation. Ectoderm also forms neural crest.
4 0
3 years ago
Do you consider scientific truth as objective and universal? Explain your answer.
Irina18 [472]

Explanation:

Tahukah kamu, mengapa motor berhenti di depan lampu merah?

karena motornya direm. Coba kalau nggak direm bisa bahaya tuh.

Tebak binatang apa yang jago renang?

Bebek. Kalau ikan bukan renang tapi menyelam

Kenapa di rel kereta api ditaruh batu?

Soalnya kalau ditaruh duit nanti pada diambil.

5 0
2 years ago
What is the main function of the respiratory system of a frog?
hammer [34]
It absorbs oxygen while at the same time releases carbon dioxide across its surface 
7 0
2 years ago
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