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
maria [59]
3 years ago
15

During what geological period do the angiosperms become more common?

Biology
2 answers:
Zielflug [23.3K]3 years ago
6 0

Your answer is D cretaceous

Anni [7]3 years ago
5 0
D.) Cretaceous. Took place roughly 144 million years ago give or take. Followed the Jurassic Park era. 
You might be interested in
Most of a cell's molecules can be classified as belonging to one of four major classes: lipids, carbohydrates, nucleotides, or a
goblinko [34]

Answer:

Diagram, in attachments

Explanation:

From the left side of the screen to the right,that is from a structure with a sugar structure with two other molecules  attached to it.

The first molecular structure is Nucleotides. Reasons it contains the middle ribose sugar(5-carbon)connected to the phosphate group and  Nitrogenous bases.This is the structure of nucleotides  and when this is joined by phosphodiester bond between one a nucleotide, to the phosphate group of another  nucleotide molecule  it forms a nucleic acid molecule.

The second structure from left to right with  long carbon chains, it is  a lipid.That js an Ester formed from the reaction of fatty acids with alcohol glycerol.

However, the presence of Phophate group in structure makes it different from a normal tryglycerides.The phosphate group has replaced  one of the  the three fatty acid molecules.Therefore it is called Phospholipid.With one hydropholic ends(phosphate ends) and the hyrophobic end the  carbon chain,with one unsaturated. The lipids molecules are held together my ester bonds.

The next structure is the protein structure(dipeptide).Genrally amino acid is made up of the central Alpha carbon connected on the right by the Carbonyl group(coo-) on the left by the Amine(NH2) group.The R-group which determines the type of amino acids  and hyrdogen atom.In the above structure condensation reaction  has occurred between the hydrogen atom  of  the amine group and carbonyl group of the other amino unit to form a dipeptide.The  bond formed from the condensation is the peptide bond.

The last structure on the far right are the carbohydrate -ring structure and the straight chains.The functional groups of the CHO  -Carbonyl group and hydroxyl group are glues to this.

3 0
3 years ago
A valid scientific investigation must be able to be
san4es73 [151]
Answer: in order for a scientific investigation to be valid A hypothesis must be tested throughout a Scientific investigation that can gather evidence and support it.

Explanation: in any scientific investigation you have to have a testable hypothesis, without your hypothesis it’s not really a scientific investigation.


Hope this helped!
7 0
2 years ago
Which statement describes the relationship between the deer and the bear on the food web?
nalin [4]
The answer is A, as bears don’t eat deer, but they both eat plants.

Heterotrophs are animals.

Autotrophs are plants.

Hope this helps!
3 0
3 years ago
Applying fungicides to plants may result in the plants showing signs of phosphorus deficiency. What is the most likely explanati
Umnica [9.8K]

Answer:

The fungicide destroys mycorrhizal symbionts.

Explanation:

Mycorrhizal symbionts is the symbiotic association that is present between plants and fungi. Plants provide food materials in the form of sugar to the fungi while fungi fixes phosphorus for the plant that is present in the soil in unavailable form. When fungicide is sprayed, it kills the fungi present in the soil and deficiency of phosphorus occurs in plants.

3 0
2 years ago
What are the unique characteristics of the water molecule ?
galina1969 [7]
The answer is: It keeps you Hydrated 
7 0
3 years ago
Other questions:
  • Succession is the process of change in the biodiversity of an ecosystem over time. one type of succession is a process that brin
    11·1 answer
  • Organisms in the same ecosystem are all _______.
    5·2 answers
  • Scientists follow a specific series of steps known as the ____________ to help answer questions about the natural world.
    12·1 answer
  • Norway is a country famous for its fjords true or false
    6·2 answers
  • Which nerve is responsible for weakness in climbing stairs or jumping?
    13·1 answer
  • Will give Brainiest!
    8·2 answers
  • during mitosis and meiosis, DNA is duplicated, chromosomes separate, and cytoplasm divides. how are mitosis and meiosis differen
    6·1 answer
  • Since plant matter generates heat as it decomposes, where would a fire be most likely to start in the piles of grass?
    11·1 answer
  • What is a Compost? helphelphelp ​
    8·1 answer
  • In which part of the food chain is each of the algae?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!