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olga_2 [115]
3 years ago
9

1. Which of the following correctly describes homeostasis in protists?

Biology
2 answers:
SOVA2 [1]3 years ago
6 0
B) Vacuoles allow water to enter and exit the paramecium. 
Please let me know if you need more help!
fgiga [73]3 years ago
5 0

The answer would be B have a great day!

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Can someone plz help me? ;(
just olya [345]

Answer:

C

Explanation:

D in my opinion wouldn't be correct because a vaccine is for if you come in contact with the sickness you are more protected and helps build immunity. So healthy people get them to try and build immunity against said vaccine. Like if you have the flu, your body is fighting. In the Flu vaccine parts of the flu are in the vaccine to help your body learn to become immune. So option C.

Sorry if this is confusing, hope it helps!

8 0
2 years ago
Read 2 more answers
The fact that choanoflagellates and collar cells of sponges resemble each other supports the inference that ________. Group of a
antoniya [11.8K]

Answer:

choanoflagellates and sponges are sister groups

Explanation:

The choanoflagellates are small unicellular organisms belonging to the Protista kingdom. These microorganisms are collared flagellates morphologically similar to the choanocyte cells of animal sponges, which have a central flagellum surrounded by a collar of microvilli. In consequence, it has been suggested that choanoflagellates may represent the closest living relatives of primitive metazoans (i.e., they are sister groups to sponges). This hypothesis has recently been supported by both molecular phylogenetic and comparative genomic analyses.

6 0
2 years ago
A mutation in a G-protein prevents the alpha-subunit from dissociating from the beta/gamma-subunit. What effect will this have o
Ymorist [56]

Answer:

the pathway will be under-expressed.

  • the alpha subunit helps to bind with either GDP or GTP. when the α subunit is bound with GDP, it will be bound to β and γ subunits and thus forms an inactive state for G-protein.
  • when the alpha subunit binds with the GTP, it becomes activated and dissociates β and γ subunits.

if G-protein Coupled Receptor is unable from dissociating β and γ subunits, then the pathway will go under expression.  

The chemical qualities of the alpha subunit allow it to bind easily to one of two guanine subunits, GDP or GTP. The protein thus has two functional formations. When GDP is bound to the alpha subunit, the alpha subunit remains bound to the beta-gamma subunit to form an inactive trimeric protein.

G-proteins, cAMP, and Ion Channel Opening. The alpha subunit activates adenylate cyclase, in purple, and loses GTP. Adenylate cyclase converts ATP to cyclic AMP, which then activates Protein Kinase, shown in blue. Protein Kinase phosphorylates an ion channel, letting sodium ions rush into the cell.

As a result of the ligand binding to its site on the G-protein-linked receptor, A) the G-protein changes conformation and GTP replaces the GDP on the alpha subunit. ... Inactivation of the alpha subunit occurs when its own phosphorylase activity removes a phosphate from the GTP.

8 0
3 years ago
Which of the following best describes the solar radiation absorbed by and radiated from earth
KiRa [710]
I would say your answer is <span><span>The Earth’s surface is responsible for a small fraction of heat radiation to space</span>
</span>
3 0
3 years ago
Read 2 more answers
Name the red pigment inside red blood cells that help to carry oxygen.
Ksju [112]

Answer:

Hemoglobin.pulmonary artery.

Explanation:

1. about hemoglobin.Hemoglobin is the protein inside red blood cells. It carries oxygen.

2. about pulmonary artery.The pulmonary artery is a big artery that comes from the heart. It splits into two main branches, and brings blood from the heart to the lungs. At the lungs, the blood picks up oxygen and drops off carbon dioxide. The blood then returns to the heart through the pulmonary veins.

3. There exist a concentration difference of carbon dioxide and oxygen inside the alveoli and capillaries due to which the diffusion of the two gases takes place. The carbon dioxide moves from the blood to the alveoli sac and the oxygen moves from the sacs to the blood.

3 0
11 months ago
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