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
Nadya [2.5K]
3 years ago
7

What event marked the end of the Cretaceous Period?

Biology
2 answers:
xeze [42]3 years ago
8 0

Answer:

Cretaceous–Paleogene extinction event

Explanation:

The Cretaceous–Paleogene extinction event, also known as the Cretaceous–Tertiary extinction, was a sudden mass extinction

iragen [17]3 years ago
4 0

Answer: the great extinction

Explanation:  which the dinosaurs died out, except for the birds, of course.

You might be interested in
Place the events in the correct order:
Alecsey [184]

Answer:

1. Chromatin condense into chromosomes.

4. Homologous chromosomes pair up (formation of tetrads).

5. Homologous chromosomes separate and move to poles.

2. Sister chromatids separate.

3. Chromosomes unravel in to chromatin.

Explanation:

This question portrays the process of meiosis in a cell. The ordered sequence of events in the options are:

1. Chromatin condense into chromosomes - This process occurs in the Prophase stage. Prior to the cell division, the nuclear material is found as Chromatin material. This Chromatin material then undergoes condensation to form visible chromosomes.

4. Homologous chromosomes pair up (formation of tetrads) - This process also occurs during the Prophase stage of meiosis I. In this stage, homologous chromosomes (similar but non-identical chromosomes received from each parent) are paired up side by side to form a structure known as TETRAD or BIVALENT.

5. Homologous chromosomes separate and move to poles - This process characterizes the Anaphase stage of meiosis I. Homologous chromosomes are pulled apart to opposite poles of the cell by spindle microtubules.

2. Sister chromatids separate - After meiosis I, meiosis II involving sister chromatids instead of homologous chromosomes follows. In the Anaphase stage of meiosis II specifically, sister chromatids are pulled apart towards opposite poles of the cell.

3. Chromosomes unravel in to chromatin - After the whole division process i.e. karyokinesis (division of the nuclear material), the chromosomes begin to unravel to form the CHROMATIN threads once again. This process occurs in the Telophase stage of meiosis.

5 0
3 years ago
What is the current theory of the origin of life
DerKrebs [107]
The origin of life<span> on Earth is a set of paradoxes. In order for </span>life<span> to have gotten started, there must have been a genetic molecule something like DNA or RNA capable of passing along blueprints for making proteins, the work horse molecules of </span>life<span>.</span>
5 0
3 years ago
Which main plant tissue is shown in green?<br> dermal<br> ground<br> vascular<br> meristem
Maksim231197 [3]
<u>Ground tissue</u>, which is also known as cortex, is the main plant tissue shown in green in the image.
8 0
3 years ago
Read 2 more answers
Take a few minutes to look at pictures of humans and humpback whales. You can look for the images on the Internet or look throug
7nadin3 [17]

Answer:

their are the characteristics of the similar term of physical feature

8 0
3 years ago
What daughter isotope does uranium-238 become when it decays?
andrew11 [14]
<span>The end product of the radioactive decay of uranium is a non-radioactive lead isotope.

Hope this helps please award brainly :)
</span>
4 0
3 years ago
Other questions:
  • Which statement is a valid claim that could be made using the data in the graph?
    6·2 answers
  • which organic compounds would be the best to analyze in order to determine if two species are closely related?
    7·1 answer
  • Which experiment should be considered as a field investigation
    6·1 answer
  • In one town, some people support a proposal to
    10·1 answer
  • What did people rely on rivers for during the eighteenth century? Select the three correct answers.
    6·2 answers
  • Imagine that you are a doctor. During your last shift, 20 babies were born. 10 had blue eyes, and 10 had brown eyes. 15 had roun
    15·1 answer
  • Deep vein thrombosis
    7·1 answer
  • What is photolysis? Define it.​
    10·2 answers
  • Draw the DNA strand separating down the middle is in the beginning of DNA replication
    6·1 answer
  • Explain why a fossil record is not 100% accurate
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!