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
netineya [11]
3 years ago
11

What observation led researchers to propose that chloroplasts evolved from cyanobacteria? A) Both produce proteins. B) Both cont

ain mitochondria. C) Both provide structure to cells. D) Both perform photosynthesis.
Biology
2 answers:
MissTica3 years ago
8 0

Answer:

D

Explanation:

edge

a_sh-v [17]3 years ago
4 0
(D) Both perform photosynthesis is the observation that led researchers to propose that chloroplasts evolved from cyanobacteria.
Chloroplasts is the area where photosynthesis takes place. It is a green organelle in a plant cell. Pigments called the chloros in a chlorophyll are needed for the photosynthesis.
Cyanobacteria or blue-gree algae contains a blue photosynthetic pigment and a chlorophyll for photosynthesis.
You might be interested in
A pregnant woman has come to the emergency department with complaints of nasal congestion and epistaxis. What is the correct int
lys-0071 [83]

Answer:

It should be noted the options for the question are not complete. But the answer is,

As capillaries become engorged, the upper respiratory tract is affected by the subsequent edema and hyperemia, which causes these conditions, seen commonly during pregnancy.

Explanation:

Nasal congestion is a situation where the nasal passage become blocked. This is due to the swollen of the tiny blood vessel lining the nose. This is because the  blood vessels have been inflamed.

There are many methods which can be adopted to relieve it.Some of them are

* Drinking lots of fluid

* Breathe in steam from a container with warm water

* using vaporizer

* Avoiding chlorinated pools.

Epistaxis is known to be bleeding from the nose. This can be caused by been exposed to dry air, which can cause the damage of the tiny blood vessels.

One of the methods that can be use as treatment is cauterization.  This is the use of chemical swabs to cautirize the nose , and this eventually seals the damaged blood vessels.

This is an emergency situation in a pregnant woman because, it may may reduce the amount of oxygen required by the unborn baby.

5 0
3 years ago
Answer first and correct for brainly
Nimfa-mama [501]

Answer:

chemical, mechanical, electrical

Explanation:

8 0
3 years ago
Based on the body structures of these animals, which two conclusions are scientifically sound?
svetlana [45]

Answer:

either A , D

Explanation:

all for have a vertabrae,although the gorilla and the chimpanzee do show signifacant same structure.

6 0
3 years ago
Read 2 more answers
Which is an adaptation that helped plants survive on land?
ANEK [815]

Answer:

Formation of cuticles. (A P E X)

Explanation:

6 0
4 years ago
Phenylketonuria causes a severe cognitive disability due to the inability to metabolize phenylalanine. It is an autosomal recess
Schach [20]

Answer:

The frequency of the carriers (heterozygotes) in Massachusetts is 0.018

Explanation:

Due to technical problems, you will find the complete explanation in the attached files

Download pdf
5 0
3 years ago
Other questions:
  • __________ describes an allele that is masked by a dominant allele.
    15·2 answers
  • 1. DNA replication produces two identical DNA molecules, called , which separate during mitosis. 2. After chromosomes condense,
    8·1 answer
  • What implications do these new understandings have on how we educate and rehabilitate adolescents?
    11·1 answer
  • What is the function of the organelle labeled number 9 in the image above?
    9·1 answer
  • Which best describes a gene
    13·2 answers
  • Which of the following processes removes CO2 from the atmosphere?
    10·1 answer
  • Which of the following is not a possible pollutant?
    7·2 answers
  • What does genetic drift mean ?
    5·2 answers
  • Phenotype and genotype of this punnet square?<br><br>​
    6·2 answers
  • ( PLEASE HURRY, WILL GIVE BRAINLIEST IF CORRECT )
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!