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iren [92.7K]
3 years ago
7

33. Which is a characteristic of vertebrates? O exposed nervous system O O cephalized O open circulatory system O single-celled​

Biology
2 answers:
Gennadij [26K]3 years ago
8 0

Answer:

the characteristic of vertebrates from the following is

  • exposed nervous system
Ede4ka [16]3 years ago
6 0

Answer:

Its A: exposed nervous system

Explanation:

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C4 plants are thought to be more efficient than c3 plants because they
postnew [5]

Answer:

C4 plant are capable to deal with photorespiration

Explanation:

C4 are more efficient than the C3 plants because the C4 have a mechanism to deal with the photorespiration. C4 combat photorespiration by fixing the intial carbon dioxide between mesophyll and bundle-sheath cells (in space)and calcin cycle. The light dependent process and the calvin cycle are separate in C4 plants. Also C4 plants can adapt easily to even hot sunny environment

7 0
3 years ago
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What is a front?<br><br> -Air Masses and Fronts 9th grade science- <br> HELP ASAP
frez [133]

A air front is typically a transition zone between two unique temperature/humidity. Usually, one front would push the other away (typically if summer is hot, then the warm front will push away the cold, and for the winter, if it's cold, it's the opposite).

A stationary front, on the other hand, is when there is no change in the over all temperature for the region(s), and a occluded front is when the fronts mix, where it is followed by rain and a equillibrium of the temperature, whether to a warmer or cooler overall temperature.

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5 0
2 years ago
The removal of soil or sediment by wind and moving water or ice is called
GuDViN [60]

Hello!


Your answer would be erosion.


Erosion means to "move" sediments through wind, water, etc.

Weathering means to break down something.

Decomposition means to decay.


Hope this helps! Have a amazing day! ~Pooch ♥

3 0
3 years ago
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Which of the statements regarding the cell cycle is true? Group of answer choices It is regulated by cyclins and CDKs. Different
MA_775_DIABLO [31]

Answer:

All of these choices are correct.

Explanation:

Cell cycle is the process of growth and division of cell. It comprises of interphase and mitosis. In interphase the cell grows, replicates its genomic content and prepares itself for division. In mitosis the division occurs.

Cell cycle is controlled by a group of kinases called as Cyclin dependent Kinases (CDKs). They act by phosphorylating their substrates. They are of various types like Cdk1, Cdk2, Cdk4 etc. They become active when they bind to a regulatory protein called cyclin. They are also of various types like Cyclin A, Cyclin B, Cyclin C etc. Level of cyclin and corresponding CDK increases and decreases according to the stage of cell cycle. For example in S phase of cell cycle concentration of cyclin A and E shoots up. CDK2 is able to bind to these cyclin molecules and hence it becomes active.

Cell cycle has major checkpoints where the condition of cell is analysed before it proceeds to the next stage of cycle. If any abnormality is detected, repair mechanism is activated or the cell is killed. Checkpoints do not allow cell cycle to proceed in damaged cells.

p53 is a tumor suppressor protein which can halt cell cycle when it detects some abnormality in cell. It usually acts in G1/S checkpoint (before the DNA replication starts in cell) and G2/M checkpoint (before the cell division begins). Hence, all of the above statements are true.

7 0
4 years ago
In which types of relationship do both species always benefit
maxonik [38]

Answer:

Mutualism is the type of relationship where both of the species benefit from the other.

6 0
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