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Akimi4 [234]
2 years ago
7

The Helper T-Lymphocyte expresses ______________ and ______________ on its surface. Select an answer and submit. For keyboard na

vigation, use the up/down arrow keys to select an answer. a CD-4; T-cell receptor b CD-8; T-cell receptor c Class II MHC; CD-4 d Class II MHC; CD-8 e Class II MHC; T cell receptorThe Helper T-Lymphocyte expresses ______________ and ______________ on its surface. Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a CD-4; T-cell receptor b CD-8; T-cell receptor c Class II MHC; CD-4 d Class II MHC; CD-8 e Class II MHC; T cell receptor
Biology
1 answer:
ehidna [41]2 years ago
7 0

Answer:

Jbih if

Explanation:

.

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In prehistoric times volcanic eruptions caused mass extinctions of many species of marine organisms attached to the ocean floor.
djyliett [7]

Answer: A). Volcanic eruptions change the pH and temperature of the ocean.

Explanation:

Volcanic eruption from an oceanic floor likely to release gases, sediments which can be of high temperature. The sediements will increase the turbidity in the water and will change the pH and the high temperature may not be tolerated by plants and animals. This may be the result of extinction of many species of marine ecosystem.

8 0
3 years ago
How does severe weather in earth's atmosphere affect earth's geosphere
Ket [755]
Severe weather has some major factors of erosion, for example, rain can strip away rock and sand combined with wind can do the same.
6 0
3 years ago
Examples of how humans negatively affect local ecosystems are
iogann1982 [59]

Answer:

<u>A.  Building dams, deforestation cutting down trees), adding point sources to nearby streams to allow for run-off, building roads and structures, and salting roads.</u>

Explanation:

Removing non-native species from the environment helps the native ants to thrive without having any changes in the ecosystem effect them (i.e. new invasive animal).

Creating laws to prohibit fishing from local streams helps keep the fish alive and allowing them to continue to use this stream.

Planting trees and other plants to attract native species helps secure and grow the ecosystem of that area.

<em>This leaves </em><em>A</em><em> </em><u><em>as the answer.</em></u>

<u><em /></u>

Hope that helps you!

5 0
3 years ago
If a lab fire erupts, immediately *
steposvetlana [31]

Answer:

notify your teacher

Explanation:

5 0
3 years ago
Read 2 more answers
susie just squished a cockroach and its pale yellow hemolymph squirted out on the floor. if susie analyzed the hemolymph, she wo
FinnZ [79.3K]

Except Erythrocytes, <u>because insects do not have the Red Blood Cells</u>.

Erythrocytes- Red blood cells, also known as erythrocytes or RBCs, are biconcave, anucleate cells that contain <u>hemoglobin </u>and carry oxygen and carbon dioxide between the lungs and organs. Erythropoiesis, a process in the red bone marrow, is what creates them.

Hemoglobin- The protein molecule known as hemoglobin is found in red blood cells and is responsible for transporting oxygen from the lungs to the body's <u>tissues </u>and carbon dioxide from the tissues back to the lungs. Four linked protein molecules (globulin chains) make up the hemoglobin molecule.

A collection of cells with similar structures and functions is referred to as a tissue.

To know more about the Erythrocytes, click on the below link,

brainly.com/question/16794540

#SPJ4

5 0
2 years ago
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