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
svet-max [94.6K]
3 years ago
15

1. Scientists believe that ancient ancestors of all animals were (1 point) A) single-celled prokaryotes that reproduced asexuall

y. B) single-celled eukaryotes that sometimes grew in colonies. C) multicellular organisms that were probably autotrophic. D) multicellular organisms with an alternation of generations lifecycle. 2. The Cambrian Explosion resulted in the evolution of the first (1 point) A) dinosaurs and mammals. B) representatives of most animal phyla. C) bacteria. D) land animals.
Biology
2 answers:
nignag [31]3 years ago
5 0

1. The correct answer is option B, single-celled eukaryotes that sometimes grew in colonies

Reason – Single celled species are originally the main ancestors of all animals because after evolution and classification, these species evolved into multicellular organisms which later on further diversified into different generas, species and classes. Living in colonies allowed these single celled species to produce sexually

2. The correct answer is option B, representatives of most animal phyla

Reason – The cambarian explosion is considered as the most evolutionary phase in the Earth’s history. All major animal body plans including Ctenophora, Poriferas, Cindaria, Chordata, Hemichordata, Echinodermata, Nematoda, Artropoda, Platyhelminthes, Mollusca, Annelida, Brachiopoda etc. occurred during this period.  

Bess [88]3 years ago
4 0
Scientists believe that ancient ancestors of all animals were single celled eukaryotes that sometimes grew in colonies. The correct option among all the options that are given in the question is the second option or option "B".

The Cambrian Explosion resulted in the evolution of the first representatives of most animal phyla. The correct option among all the options that are given in the question is option "B".
You might be interested in
The theory of endosymbiosis suggests that ______.
WINSTONCH [101]
The theory of endosymbiosis suggests that a<span> primitive aerobic prokaryote was engulfed by a larger anaerobic prokaryote. C

HOPE THIS HELPS! ^_^</span>
5 0
3 years ago
In Linneaus's book Systema Naturae, minerals were originally included while classifying living things. But, minerals were later
Archy [21]

Answer:

D. New interpretations are a part of science.

hope this helps :)

6 0
2 years ago
Read 2 more answers
What are the reactants for oxidation reaction?
Alexxx [7]

The reactant that brings about the oxidation is called the oxidising agent, and that reagent is itself reduced by the reducing agent.

Oxidation occurs when a reactant loses electrons during the reaction. Reduction occurs when a reactant gains electrons during the reaction. This often occurs when metals are reacted with acid.

Oxidation is loss of electrons (OIL RIG). Therefore, an oxidising agent takes electrons from that other substance. Therefore, an oxidising agent must gain electrons.

Oxidation happens when an atom loses one or more electrons during a chemical reaction, meaning that its oxidation number increases. This is because the atom loses the negative charge of the electron, which is similar to gaining a positive charge, increasing the oxidation number.

To know more about oxidation click here

brainly.com/question/25886015

#SPJ4

6 0
1 year ago
I'LL GIVE BRAINLIEST IF YOU EXPLAIN THE ANSWER: <br><br> CHOOSE TWO
RoseWind [281]
B and D. The xylem and the phloem make up the vascular tissue of plants and transport water, sugar, and other important substances around a plant.

The cells that die are emptied, leaving hollow cell walls with their ends open, thus forming pipe-like structures

Hope this helps
3 0
3 years ago
PLEASE help with these! I still have a lot more questions I need help with too, if nyone can help please do, thank you!!
olga2289 [7]
8)the answer is c
9)the answer is d
5 0
3 years ago
Read 2 more answers
Other questions:
  • What is the effect a nervous system disorder to the respiratory system?
    15·1 answer
  • What is the ability to cause change?
    10·2 answers
  • After staring at a blue light for a few minutes, yoko shifts her gaze to a white wall and experiences an afterimage in the color
    7·1 answer
  • Most Volcanoes are located at?
    6·1 answer
  • What are four sources of minerals?
    11·2 answers
  • Why do living things store energy in lipids instead of carbohydrates??
    10·1 answer
  • What makes the cell theory a scientific theory?
    8·1 answer
  • Which theory best explains the present arrangement of continents oceans and landforms on earth
    12·2 answers
  • Visual and hearing receptors are irreplaceable, but the taste and olfactory receptors are continuously renewed True False
    12·1 answer
  • In this activity, you will write a description of the terrarium model you created to represent the different systems (spheres) o
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!