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
Snezhnost [94]
2 years ago
15

Classes of pteridophytes​

Biology
1 answer:
irga5000 [103]2 years ago
4 0

Answer:

There are four classes, namely:

Psilopsida.

Lycopsida.

Sphenopsida.

Pteropsida.

Explanation:

You might be interested in
why do the three species have similarities and differences in their body structures, and how can Xiao use the structures to dete
Luba_88 [7]

Answer:

Xiao can use these structures to create a similarity matrix that enables to differentiate between synapomorphies and homoplasies .

Explanation:

A synapomorphy is a trait that has been inherited from the same ancestor, this trait enables to establish a relation of homology between two or more species; while a homoplasy is an analog structure that doesn't have homology.

3 0
3 years ago
Looking at an ocean, how do we know if the water is heavy or light?
Nikitich [7]

Answer:

Depend on how much water there is

Explanation:

6 0
2 years ago
Read 2 more answers
6. Calculate the kinetic energy of a baseball thrown by Aroldis Chapman, who holds the world record for fastest pitch. The baseb
GrogVix [38]

Answer:

D

Explanation:

=122

5 0
2 years ago
The most abundant element in the atmosphere can also be found in ?
arsen [322]
The most abundant element in the atmosphere can also be is nitrogen since nitrogen gas accounts for about 78% of the atmospheric gases. Beans and whey protein are, of course, high in protein, and a fundamental component of proteins at the molecular level is a nitrogen-containing group called an amine group.
7 0
2 years ago
Read 2 more answers
What are two factors that can affect an enzyme from working or become denatured
Klio2033 [76]
The activity of an Enzyme is affected by its environmental conditions. Changing these alter the rate of reaction caused by the enzyme. In nature organisms adjust the conditions of their enzymes to produce an Optimum rate of reaction where necessary or they may have enzymes which are adapted to function well in extreme conditions where they live.
6 0
3 years ago
Other questions:
  • Explain what the international research team discovered and where this discovery is located in the body.
    11·2 answers
  • What statement best compares photosynthesis and cellular respiration?
    10·2 answers
  • A heat lamp can transfer ___ to baby chicks using light waves?
    11·1 answer
  • N ________ a single sperm cell from the man is injected using a microscopic needle, directly into each harvested egg from the wo
    9·1 answer
  • Which statement about relative potential energy of electrons is correct?
    8·2 answers
  • Gregor Mendel used pea plants that were heterozygous for each of two traits seed color and seed shape
    15·1 answer
  • Chromosomes are duplicated during what stage of the cell cycle?
    14·1 answer
  • Which sequence shows increasing complexity of ecological organizations
    7·1 answer
  • How does the liver help in maintaining homeostasis
    7·1 answer
  • Which statement about organs is TRUE?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!