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My name is Ann [436]
3 years ago
12

What are some features of birds that reflect how they may have evolved from dinosaurs

Biology
1 answer:
ankoles [38]3 years ago
8 0

Some features might be feathers, thin bones, they are lighter to make flying easier.

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Which is a way for the body to conserve water during periods of heavy sweating?
Diano4ka-milaya [45]
It can filter less water out of the blood.!
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3 years ago
What is a physical or mental representation of an object or an event
jeka94
Physical is something you can have/ hold and mental is something in ur head that you can't see or hold.

4 0
3 years ago
The regulation of gene expression in individual cells coordinates the development of multicellular organisms, ensuring that tiss
Pie

Answer:

Following Statements are true.

1. Cells receive molecular signals that communicate their position in relation to other cells.

3. Differential gene expression affects the developmental process in animals.

4. Positional information controls pattern formation.

6. Homeotic genes code for transcription factors that control the development of segment-specific body parts.

Explanation:

The formation of an eukaryotic organisms's spatial organization which includes organ formation and tissue arrangement is called as Pattern formation.

Molecular signals are received by cell. This phenomenon collectively refereed as positional information. Through this phenomenon cells are informed about their locomotion with respect to body axes and other cells. Regulation of pattern formation is controlled by Positional information.

When body axes is established a gene called homeotic gene start working as regulatory genes. This gene identify specific body segment in an organism which results in the formation of segment-specific body structures in the correct locations on the body.

3 0
3 years ago
A transcriptional repressor that controls the transcription of gene A is not normally active unless bound by an effector molecul
iren [92.7K]

Answer:

Increase in transcription

Explanation:

Transcription is the process of forming RNA from DNA. It can be controlled by many factors like a repressor. Repressor can bind to the operator region of the promoter and hinder the movement of RNA Polymerase enzyme, halting the process.

Here, it is given that the repressor needs to first bind to an effector molecule X. Once it binds to X, it is activated and then it can bind to operator of gene A to inhibit its transcription. If the X binding domain on repressor is mutated it wont be able to bind to X. Thus it wont get activated and wont be able to attach to operator region to inhibit transcription. Hence, transcription process will keep going on uncontrolled.

5 0
3 years ago
⚠️⚠️ Based on Leah’s observations , she can conclude that the unknown substance is which of the following ⚠️⚠️
bezimeni [28]

Answer:

Acid

Explanation:

I hope this helps!!

6 0
2 years ago
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