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o-na [289]
3 years ago
8

Can someone please help me?

Biology
1 answer:
Alex Ar [27]3 years ago
5 0

Answer:

Part 1 i think, im not 100% sure

Explanation:

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The mineral magnetite is generally black or dark gray, with a metallic luster.
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Answer:

Magnetite is black or brownish-black with a metallic luster, has a Mohs hardness of 5–6 and leaves a black streak.

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3 years ago
Fitness is determined by
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Answer:

Averaging the fitness of its members.

Explanation:

The fitness of a whole population can also be determined by averaging the fitness of its members. Absolute fitness is the ratio between the number of individuals with a genotype before selection versus after selection. Fitness is usually discussed in terms of genotypes, or collection of genes.

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3 years ago
What is an active site?
Ierofanga [76]

Answer:

B is correct.

Explanation:

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3 years ago
Which feature forms when magma cools beneath Earth’s surface?
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Answer:

batholiths

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batholiths are large masses of rocks composed of granite formed deep in the earth crust and ejectable in a molten state.

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4 0
3 years ago
Read 2 more answers
An actin-binding protein called cofilin binds preferentially to ADP-containing actin filaments rather than ATP-containing actin
Phantasy [73]

Answer:

Cofilin binds to older actin filaments

Explanation:

Microfilaments (also called actin filaments) are a class of protein filament common to all eukaryotic cells, which consist of two strands of subunits of the protein actin. Microfilaments form part of the cell's cytoskeleton and interact with the protein myosin in order to allow the movement of the cell. Within the cell, actin may show two different forms: monomeric G-actin and polymeric F-actin filaments. Microfilaments provide shape to the cell because these filaments can depolymerize (disassemble) and polymerize (assembly) quickly, thereby allowing the cell to change its shape. During the polymerization process, the ATP that is bound to G-actin is hydrolyzed to ADP, which is bound to F-actin. ATP-actin subunits are present at the barbed ends of the filaments, and cleavage of the ATP molecules produces highly stable filaments bound to ADP. In consequence, it is expected that cofilin binds preferentially to highly stable (older) filaments ADP-actin filaments instead of ATP-actin filaments.

4 0
2 years ago
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