This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Today, there are over 270,000 plant species with conductive tissues and material flow systems known ... (Read 292 times)

kaid0807

  • Hero Member
  • *****
  • Posts: 515
on: Jul 14, 2018
Today, there are over 270,000 plant species with conductive tissues and material flow systems known as
 
  A) vascular plants. B) xeriphytes. C) blue-green algae. D) cyanobacteria.

Question 2

The gaseous oxygen in Earth's early atmosphere was a by-product of
 
  A) photosynthesis.
  B) photochemical reactions breaking down ozone (O3 ) to form oxygen (O2 ).
  C) volcanic outgassing.
  D) decay of organic matter.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Jevvish

  • Sr. Member
  • ****
  • Posts: 326
Reply #1 on: Jul 14, 2018
Answer to Question 1

A

Answer to Question 2

A


kaid0807

  • Hero Member
  • *****
  • Posts: 515
Reply #2 on: Jul 14, 2018
Thank you :)


Jevvish

  • Sr. Member
  • ****
  • Posts: 326
Reply #3 on: Jul 14, 2018
Happy to help you


« previous next »
 

Did you know?

The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

Did you know?

Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Did you know?

Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

These species are all at risk of extinction. Species with “slow” life-h These species are all at risk of extinction. Species with “slow” life-h
Benign prostatic hyperplasia. The condition results when an inner capsule of nonfunctional prostate Benign prostatic hyperplasia. The condition results when an inner capsule of nonfunctional prostate
Plant Plant
In one-male group species, extra males typically reside in all-male “bachelor” groups. These are Han In one-male group species, extra males typically reside in all-male “bachelor” groups. These are Han
Video: Cardiac Cycle (Part 4 of 4)

For a complete list of videos, visit our video library