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d1i1m1o1n [39]
3 years ago
11

What do checkpoints do in the cell cycle? *

Biology
1 answer:
natta225 [31]3 years ago
7 0

Answer:A checkpoint is a stage in the eukaryotic cell cycle at which the cell examines internal and external cues and "decides" whether or not to move forward with division.

Explanation: Easy Peasy

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motikmotik

Answer:

<em><u>D. The first flowering plants were introduced toward the end of the Mesozoic era.</u></em>

<em><u /></em>

Explanation:

Following the Paleozoic Era, the Mesozoic Era or <em>Age of Conifers</em> began approximately 250 million years ago. This major geological era brought about the ancestors of many of the plant and animal groups still in existence today.

The Mesozoic era is marked by 3 divisions:

  1. the Triassic Period,
  2. the Jurassic Period,
  3. and the Cretaceous Period.

Animals and plants slowly recovered  after the mass extinction in the Permian-Triassic extinction that led to the eradication of most aquatic marine species. They evolved to exploit varying niches in their environment, leading to a boom in terrestrial animals. Over time the planet's increasingly warm climate, abundant in atmospheric oxygen and carbon dioxide, contributed to the growth of diverse megaflora, that rapidly dominated the planet's terrestrial biosphere.

By the end of the <em>Mesozoic Era</em>, in the Cretaceous period, flowering plants (angiosperms) largely replaced the dominant seed ferns of the <em>Triassic</em>, and the conifers, cycads and gymnosperms of the <em>Jurassic</em>.

<em>Varied dispersal  mechanisms in angiosperms co-evolved with the evolution of certain types of fauna. Plants used animal life, including herbivorous reptiles and early mammal-like species to disperse large seeds.</em>

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3 years ago
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If substances A and B are both in the solid phase and are at the same energy level, which of the two substances will need to hav
Keith_Richards [23]
Look at the photo for reference if you still need help unless you haven’t gotten it yet.

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3 years ago
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Please help very easy 5th grade work giving brainliest
strojnjashka [21]

Answer:

pretty sure its A hope this helps!

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_____ mimic the process of natural evolution to generate solutions to optimization and search problems.
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Search algorithms are used to generate solutions to optimization and search problems.

Search algorithms that mimic the process of natural evolution. Search algorithms can be used to generate solutions to optimization and search problems using techniques such as <em>mutation, selection, crossover, and chromosome</em>.

Find out more at: brainly.com/question/12946457

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2 years ago
PLEASE HELP PLEASE!!!! DOES ANYONE SOMEONE NAMED HIROJABAMI!?!?!? PLEASE HELP!!!!.....
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Answer:

well I dnt know

btw thanks for ur points I really needed that.

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