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]
3 years ago
15

Classes of pteridophytes​

Biology
1 answer:
irga5000 [103]3 years ago
4 0

Answer:

There are four classes, namely:

Psilopsida.

Lycopsida.

Sphenopsida.

Pteropsida.

Explanation:

You might be interested in
Opinions on eugenics? also with facts <3
Maslowich
What? is this for points or?
3 0
3 years ago
When observing a bird skin cell in g2 under a microscope, you count 160 total chromatids. how many chromosomes does a male chick
zloy xaker [14]
When a cell is in G2 phase, it has already doubled in S phase its DNA, meaning that for each chromosome we have two chromatids -> 2n(number of chromosomes)×2(number of chromatids per chromosome)=number of chromatids.
If 160 is the number of chromatids on G2 phase of a chicken cell, it means that the cell has 80 chromosomes (2n), and after meiosis, process to form a sperm cell, will only have 40 chromosomes (n).
4 0
3 years ago
Which processes can happen to rocks?
Ksivusya [100]

Answer:

weathering.

Explanation:

3 0
1 year ago
Read 2 more answers
Name the process through which energy is Incorporated in the ecosystem?​
gulaghasi [49]

Answer:

photosynthesis

Energy enters the ecosystem via sunlight as solar energy. Primary producers (a.k.a., the first trophic level) turn that solar energy into chemical energy via photosynthesis. Common examples are land plants, photosynthetic bacteria and algae

7 0
3 years ago
2. Which two classes make up the majority of crustaceans?
Naddika [18.5K]

Answer:here's 5:

Remipiedia

Cephalocardia

Branchiopoda

Maxillopoda

Mulacostraca

Explanation:

7 0
3 years ago
Other questions:
  • All of the following processes require the cell to use atp energy,except
    10·2 answers
  • A group of scientists in alaska notices that not only have atmospheric co2 levels increased at their sampling site but so too ha
    15·1 answer
  • Which part of the brain is associated with conscious thought
    11·1 answer
  • Where do you find the DNA in our cells?
    7·1 answer
  • Visible sunspots vary in number according to a cycle of how many years?
    7·2 answers
  • Two competing hypotheses to account for the increase in the number of Hox genes from the last common ancestor of bilaterians to
    11·1 answer
  • A white flower is pp.What is its genotype?
    15·2 answers
  • The charaterists jupture nd saturan share
    5·1 answer
  • Which of the following is a skin sensory receptor for touch?
    5·1 answer
  • Why is over farming a threat to the health of humans?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!