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
qaws [65]
4 years ago
11

A student encounters a pondweed that appears to be a charophyte. Which of the following features would help the student determin

e whether the sample comes from a charophyte or from some other type of green alga?
A) molecular structure of enzymes inside the chloroplasts and presence of phragmoplasts
B) molecular structure of enzymes inside the chloroplasts and rings of cellulose-synthesizing complexes
C) structure of sperm cells and presence of phragmoplasts
D) structure of sperm cells, presence of phragmoplasts, and rings of cellulose-synthesizing complexes
Biology
1 answer:
strojnjashka [21]4 years ago
5 0

Answer:

Option D, structure of sperm cells, presence of phragmoplasts, and rings of cellulose-synthesizing complexes

Explanation:

The cells of Charophyte contain several chloroplast and nuclei and thus they are known as coenocytic.

The structure of their sperm is very similar to that of the plants on land which make it distinctive from other fresh water algae. The sperm has flagella that makes it motile.

Only one of the Charophyta species uses the phragmoplast method of cell division just like plants

Like land plants, charophytes' plasma membrane has distinctive rings of cellulose-synthesizing complexes which synthesizes cellulose microfibrils

Hence, option D is correct

You might be interested in
30. One cause of muscle soreness is
xenn [34]

Answer:

c. lactic acid fermentation

Explanation:

If we did alcoholic fermentation, working out would make us feel drunk, not sore. This is only done by yeasts (a type of fungus) and bacteria. Glycolysis is simply an anaerobic process that occurs with fermentation and also regular aerobic respiration. It doesn't cause any soreness on its own. The Krebs cycle is the second major part to cellular respiration; it produces 6 NADH's, 2 FADH2's, 4 CO2's and 2 ATP; it's not involved in creating any soreness, as cell respiration does not create soreness. That leaves lactic acid fermentation, which we, bacteria, yeasts, and other organisms do. This is what we do when we run out of ample oxygen while doing some strenuous activity. Glycolysis is done with it. Glycolysis, however, relies on NAD+ to create ATP we need to maintain the same level of activity, lactic acid is produced as it accepts the 2 electrons and [H+] NAD+  should accept.

4 0
3 years ago
Read 2 more answers
Organisms contain different levels of organization within their bodies. Arachnoidiscus ehrenbergi, pictured below, is a single-c
Ivanshal [37]

Answer:

Cell level organization

Explanation:

Organisms are composed of different level of organizations like atomic level, molecular level, cell level, tissue level, organ  level, system level after which whole organism if formed.

If we talk about <u>Arachnoidiscus</u> <u>ehrenbergi </u> it is one celled organism belonging to a group of algae. If we talk about human stomach it is an organ made up of several tissues which in-turn are made up of several cells.

So what is common in both?

It is a cell that is common in both, because cell is the basic unit for life of <u>Arachnoidiscus</u> <u>ehrenbergi </u>and a unit of the composition of whole stomach.


Hope it help!

6 0
4 years ago
Lesson 2 energy flow in ecosystems quiz
frosja888 [35]
Evehhdndjydudrjhfudusuhrhfudatvehfisyye
4 0
3 years ago
21.) What two criteria must be met before scientists can use radiocarbon dating?
kap26 [50]

21. There must be enough sample to test properly.22. Asteroid impact may be a better term than meteorite collision.The impact made the atmosphere opaquer by filling it with dust, and indirectly, smoke, from fires touched off by hot impact debris. Since the atmosphere admitted much less sunlight, photosynthesis and plant productivity were curtailed, with disastrous results, especially for those with the greatest energy requirements, the dinosaurs. Of course, many dinosaurs were killed directly by the impact in areas nearest the Yucatan zero e.g. North America
4 0
4 years ago
Transgenic animals have foreign DNA, therefore, a change in _________ and phenotype may occur.
Rom4ik [11]
A change in their genotype....
5 0
4 years ago
Read 2 more answers
Other questions:
  • _______ is usually measured in cubic meters per second.
    10·2 answers
  • Living cells cannot use heat to provide the activation energy for biochemical reactions because ________. Which choice(s) comple
    15·1 answer
  • Unlike incomplete metamorphosis, complete metamorphosis
    8·1 answer
  • Earthworms, which are land invertebrates, and caecilians, which are amphibians, have evolved with traits that enable them to bur
    13·1 answer
  • In humans, different cell types, such as smooth muscle cells, have specific structures and roles that they play in the body. Mos
    8·1 answer
  • Why would a more diverse habitat be more resilient disease, flooding, and invasion?
    7·1 answer
  • How do the sporophyte and gametophyte generations compare in a conifer?
    5·1 answer
  • What is an adaptation?
    8·2 answers
  • Thinking about Mendel’s earlier studies, does the gene that determines the shape of a seed have anything to do with the seed col
    9·1 answer
  • Single-celled organisms with cell walls do not have contractile vacuoles. Suggest why.​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!