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3 years ago

What genes direct the

Biology

1 answer:

Valentin [98]3 years ago

3 0

Answer:

a. hox genes.

Explanation:

HOX genes have the following functions:

HOX genes are the homeobox subset.

They specify the areas of the embryo's body plan along the animal head-tail axis.

They are encoding Hox proteins that specify the position characteristics and ensure that the right structures form at the right position in the body.

They regulate high-level executive genes, such as transcription factors and intracellular signaling molecules, which adhere, number, form, and growth to cells.

The vertebrates are highly preserved.

The clusters and other genes occur uninterrupted.

Evolutionary, the heterogeneous regulatory areas between the genes most previously present are larger and more preserved than those present at the other ends of the clusters.

The characteristical feature is that these are homeodomain proteins with a highly preserved area of DNA binding encoded with homeobox gens.

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If a human wanted to have the most efficient absorption of energy, what trophic level would they want to eat from?

Svetradugi [14.3K]

The first trophic level

they would want to eat the primary producers, which are located at the first trophic level. due to the 10% rule only 10% of the energy from the previous trophic level is passed on.

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3 years ago

Scientists have observed that pythons have vestigial leg bones. They have also observed that snakes in general have more DNA seq

hichkok12 [17]

The answer is They both suggest that snakes evolved from an ancestor with legs.

The second choice is not correct since we have no information about pythons and other snakes. We only have the relationship between geckos, snakes and legless eels. So, it is said that snakes in general have more DNA sequences in common with four-legged geckos than they do with legless eels. This means that snakes are closer to geckos than the legless eels. We cannot conclude from this information which evolved from which, but we can say that snakes evolved from an ancestor with legs.
In different case, if the snakes had more DNA sequence in common with legless eels, we would conclude that the snakes evolved from an ancestor without legs.

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4 years ago

What part of the scientific method is this: Because human subjects are difficult to study, laboratory rats were used. One group

astra-53 [7]

Its the experiment part where you test the hypothesis

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3 years ago

What are the components of a mixture? Define each and give an example

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3 years ago

This sample is naturally occurring, inorganic, solid, has a square crystal structure, and a definite chemical composition (NaCl)

Alika [10]

Answer:

A Mineral is defined as an inorganic, naturally occurring, homogenoussolid, with a definite chemical composition, and ordered (crystalline) atomic structures.

Explanation:

Inorganic: Involving neither organic life nor the products created from or by organic life.

Naturally Occurring: Must be formed by natural processes, meaning a mineral cannot be manmade, manufactured, or created in a laboratory.

Homogeneous Solid: A mineral must be chemically and physically uniform down to the atomic level.

This homogeneity means that the mineral will have absolutely predictable physical properties

including hardness, density, and streak.

Definite Chemical Composition means that all occurrences of that mineral have a chemical

composition that varies within a specific limited range and the atoms that make up the mineral must

occur in specific ratios.

Ordered Atomic structure (Crystalline): The atoms in a mineral are arranged in a systematic and

repeating pattern. Glasses such as obsidian, which are disordered solids, liquids (e.g., water,

mercury), and gases (e.g., air) do not have a crystalline structure and are therefore not minerals.

5 0

2 years ago