1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vichka [17]
3 years ago
15

Complex, invertebrate, life forms are common as fossils beginning with marine strata of Cambrian age. How long ago did the Cambr

ian period begin?
Biology
1 answer:
eimsori [14]3 years ago
4 0

Answer:

The beginning of Cambrian period was about 541 million years ago and ends about 484.5 million years ago.

Explanation:

Cambrian period is a geographical period that appears in Paleozoic Era and lasts at Phanerozoic Eon to the beginning of Ordovician Period and the name was given as most of the sedimentary deposits were found at that period The majority of living organism includes unicellular or some multi cellular complex life forms.

Most live forms were aquatic and arthropods were the most dominant animals in the water that are known by studying the fossil records.The species adapt themselves to change with the environmental variations.

Animals like <em>Protichnites</em> and <em>Climactichnites</em> were found during this period.

The fossil records also suggested the presence of euthycarcinoides that are the extinct arthropod species.

You might be interested in
a medical student divides a cadavers thorax into halves by cutting along the sagittal plane. This cut will divide the thorax int
wlad13 [49]

Answer:

A sagittal plane is an anatomical plane which divides the body into right and left halves. The thorax would be divided  in left and right sections.

5 0
3 years ago
Life is based on cells. What do you think of this statement?​
Diano4ka-milaya [45]

Answer:

what's the statements? can you please post it

3 0
3 years ago
(a) (1) State similar characteristics between the sea teak leaf and the weeping willow leaf
m_a_m_a [10]

1. Answer:

Both these leaves are quite similar because of their physical appearance. <em>The sea teak leaf and weeping willow leaf are narrow and elongated. However, a weeping willow leaf has tapered edges. </em>

The scientific names of sea teak and weeping willow plants are Podocarpus polystachyus and Salix babylonica.

  • The leaves of both these plants are simple regardless of their receptive compound appearance. This is due to the presence of complex vein structure on the leaf.

2. Answer:

<u>There many differences between sea teak leaf and weeping willow leaf.</u>

Sea teak leaf is 3-10 cm long while weeping willow leaf is only 6 cm long.  

Sea teak leaves are bright green and shiny while weeping willow leaves are green at top and white at the bottom.

<em>The bark of weeping willow can be used to obtain various medicines. Meanwhile, the leaves of sea teak plants are chewed to ease pain of joints. </em>

<u>Weeping willow trees are found in areas of China, South-West Asia and Europe. </u>

<u>Sea Teak trees are found in Indonesia, Malaysia etc.</u>

4 0
3 years ago
What is a niche?<br><br> i need answers!!!
Neko [114]

Answer: a niche is a role that an organism plays in an environment. If you want a dictionary definition, here it is.

Explanation:

a position or role taken by a kind of organism within its community. Such a position may be occupied by different organisms in different localities, e.g., antelopes in Africa and kangaroos in Australia

4 0
3 years ago
.
Bas_tet [7]

Answer:

<em>s</em><em>m</em><em>a</em><em>l</em><em>l</em><em>e</em><em>s</em><em>t</em><em> </em>

<em>p</em><em>l</em><em>a</em><em>n</em><em>e</em><em>t</em><em> </em><em>e</em><em>a</em><em>r</em><em>t</em><em>h</em>

<em>U</em><em>s</em><em>A</em>

<em>n</em><em>e</em><em>w</em><em> </em><em>y</em><em>o</em><em>r</em><em>k</em><em> </em><em>s</em><em>t</em><em>a</em><em>t</em><em>e</em>

<em>l</em><em>a</em><em>r</em><em>g</em><em>e</em><em>s</em><em>t</em>

<em>t</em><em>h</em><em>e</em><em> </em><em>s</em><em>o</em><em>l</em><em>a</em><em>r</em><em> </em><em>s</em><em>y</em><em>s</em><em>t</em><em>e</em><em>m</em>

<em>n</em><em>o</em><em>r</em><em>t</em><em>h</em><em> </em><em>a</em><em>m</em><em>e</em><em>r</em><em>i</em><em>c</em><em>a</em>

<em>u</em><em>n</em><em>i</em><em>v</em><em>e</em><em>r</em><em>s</em><em>e</em>

<em>m</em><em>i</em><em>l</em><em>k</em><em>y</em><em> </em><em>w</em><em>a</em><em>y</em><em> </em><em>g</em><em>a</em><em>l</em><em>a</em><em>x</em><em>y</em>

Explanation:

is this a riddle or something or it is a work

7 0
3 years ago
Other questions:
  • A student uses a balance to determine the mass of a feather. Which is most likely to be the correct measurement?
    12·1 answer
  • Science question <br> Plz help<br><br> The question number 3
    12·1 answer
  • Platelets are also called ________.
    5·1 answer
  • Which of the following best describes how genes produce traits in an organism? A. Genes are produced by chromosomes during trans
    9·2 answers
  • You decide to go on vacation in the mountains, where you are staying in a cabin. Unfortunately, when you turn on the water in th
    9·1 answer
  • What happens in prophase 1 meiosis
    5·1 answer
  • What is the primary difference between prokaryotic and eukaryotic cells?
    13·1 answer
  • What function does a nueron perform in a human body
    9·1 answer
  • How does the climate change that scientist are observing now compare with climate change in the past?
    9·1 answer
  • 2
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!