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
Natalka [10]
3 years ago
7

During which period did mammals first appear? A. Pleistocene B. Carboniferous C. Cretaceous D. Jurassic

Biology
2 answers:
Sloan [31]3 years ago
7 0
D JURASSIC PERIOD BECAUSE THEY CAME UP WHEN DINOSAURS CAME
kifflom [539]3 years ago
3 0
D.........The Jurassic Period.
You might be interested in
Any two differences between plant cells and animal cells
Natali5045456 [20]

Answer:

A plant cell is surrounded by rigid cell wall whereas animal cell does not have cell wall. Presence of a large vacuole in plant cell, which is small in animal cell. Plant cells are larger than animal cells. Plant cells have plastids whereas animal cells do not have plastids.

8 0
3 years ago
Read 2 more answers
The earth liberation front (elf) is an example of what type of organization?
erma4kov [3.2K]
ELF or the Earth Liberation Front is a group of individuals engaging in action like economic sabotage and the guerilla welfare in order for the exploitation as well as the destruction of the environment would stop. Hope this is the answer on this question.
8 0
3 years ago
What is the typical F2 ratio in the case of dominant epistasis?
inysia [295]

Answer:

12:3:1

Explanation:

<em>The typical F2 ratio in cases of dominant epistasis is 12:3:1.</em>

<u>The epistasis is a form of gene interaction in which an allele in one locus interacts with and modifies the effects of alleles in another locus</u>. There are different types of epistasis depending on the type of alleles that are interacting. These include:

  • Dominant/simple epistasis: Here, a dominant allele on one locus suppresses the expression of both alleles on another locus irrespective of whether they are dominant or recessive. Instead of the Mendelian dihybrid F2 ratio of 9:3:3:1, what is obtained is 12:3:1. Examples of this type of gene interaction are found in seed coat color in barley, skin color in mice, etc.
  • Other types of epistasis include <em>recessive epistasis (9:3:4), dominant inhibitory epistasis (13:3), duplicate recessive epistasis (9:7), duplicate dominant epistasis (15:1), and polymeric gene interaction (9:6:1).</em>
5 0
3 years ago
Explain blood curculation in human body in brief (in 100 words)​
bekas [8.4K]
Circulatory system pumps blood from the heart to the lungs to get oxygen. The heart then sends oxygenated blood through arteries to the rest of the body. The veins carry oxygen-poor blood back to the heart to start the circulation process over. Your circulatory system is critical to healthy organs, muscles and tissues.
4 0
2 years ago
An allogenic skin graft allows a person with a burn to receive skin from a donor. Patients are often given drugs to suppress the
yKpoI14uk [10]
To prevent rejection of the skin
7 0
3 years ago
Other questions:
  • If a plant cell completes the cell cycle in 24 hour, how many cells will be produced in a week? PLEASE EXPLAINNNNN
    13·2 answers
  • what are types of professional journals that explain how scientific developments are communicated to the scientific world
    8·1 answer
  • carbon dioxide helps to trap the Sun’s heat inside the atmosphere. What might happen to temperatures on Earth if your prediction
    11·2 answers
  • La mitocondria.<br> . La célula<br> . Los virusç<br> Las bacterias<br> cual es el mas grande?
    13·1 answer
  • True or false are sun is now the main sequence of its life cycle
    8·1 answer
  • If a variety of light colored moths and dark colored moths lived in a forest of trees with a lighter colored bark and the enviro
    13·1 answer
  • What surround the nucleus during the interphase
    15·1 answer
  • Which of the following are an example of stimuli? Check all that apply.
    11·2 answers
  • What is a group of similar cells that perform the same function?
    6·1 answer
  • Hurry help!
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!