Help please?!?! :) A condition in which the gametes are the same shape and size would be called: A. heterogamy B. isogamy C. oogamy D. anisogamy

Answers

Answer 1

Answer: B. Isogamy. Iso Means "the same" like Hypotonic, Hypertonic, and Isotonic?

Answer 2

Answer:

The answer is B. Isogamy

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Which type of muscle is used primarily for voluntary actions?a. skeletal
b. smooth
c. cardiac
d. both
b. and
c.

Answers

The skeletal muscle is used, so A.

You may have learned about the sheep clone Dolly in your science class. Although this experiment was greeted as a great success, there are many problems with cloning. One of the ethical issues surrounding cloning has to do with population genetics. The potential problem is that A) cloning is safer than traditional reproduction. B) cloning has become too successful in recent years. C) cloning is less safe than traditional reproduction. D) cloning could lead to a reduction of genetic variation.

Answers

Because it starts with "although", you realize there is a negative point coming in the second part of the sentence, which leads us to C and D. However, D is the one which is correct, because, in fact the genetic variation is diminished by the process of cloning. The new living organism created is a copy of some other. This way, it has the same DNA. If it the were a traditional case of reproduction, the new living organism would have a different DNA code, which leads us to answer D.

The answer to the question is D.

How many nitrogen bases make up a codon and what does it represent?

Answers

3 bases make up a codon that specifies for a specific trait.

Final answer:

A codon is made up of three nitrogen bases in an RNA molecule, each coding for a specific amino acid. It is an essential concept in understanding the production of proteins.

Explanation:

A codon in the biological context consists of three nitrogen bases. These nitrogenous bases are part of an RNA molecule. The bases can be adenine (A), guanine (G), cytosine (C), or uracil (U). Each codon represents and codes for a specific type of amino acid. As a result, a sequence of codons provides instructions for the construction of a protein. This is vital to understanding the central dogma of molecular biology—DNA makes RNA and RNA makes protein.

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Drag the tiles to the boxes to form correct pairs.Match the scenario with the type of weathering in action.
mechanical weathering
chemical weathering
biological Weathering
The root of a huge tree causes cracks in a rocky surface.
>
Part of a cliff breaks and falls due to waves.
>
Acid rain reacts with calcite present in limestone,

Answers

Answer:

The root of a huge tree causes cracks in a rocky surface.---> biological Weathering.

Part of a cliff breaks and falls due to waves.----> mechanical weathering

Acid rain reacts with calcite present in limestone---> chemical weathering

Explanation:

The root of a huge tree causes cracks in a rocky surface is the example of biological Weathering because in this weathering living organism is involved. Part of a cliff breaks and falls due to waves of water is the example of mechanical weathering because water enters the small pores of rocks and formed cracks when expands. Acid rain reacts with calcite present in limestone is a chemical weathering because acid present in rain water is responsible for the degradation and breakdown of rocks.

Here's the matching of the scenarios with the types of weathering:

1. The root of a huge tree causes cracks in a rocky surface - Biological Weathering

2. Part of a cliff breaks and falls due to waves - Mechanical Weathering

3. Acid rain reacts with calcite present in limestone - Chemical Weathering

Biological Weathering: In this scenario, the root of a huge tree causes cracks in a rocky surface. Biological weathering refers to the breakdown of rocks caused by the activities of living organisms. The roots of the tree can exert pressure on the rocky surface as they grow, causing cracks and eventually breaking apart the rock.

Mechanical Weathering: Part of a cliff breaks and falls due to waves. Mechanical weathering involves the physical breakdown of rocks into smaller fragments without changing their chemical composition. In this case, the force of the waves pounding against the cliff causes pieces of the rock to break off and fall.

Chemical Weathering: Acid rain reacts with calcite present in limestone. Chemical weathering involves the breakdown of rocks through chemical reactions. Acid rain, which is rainwater with a low pH due to the presence of acidic compounds, reacts with the calcite (a mineral in limestone) and causes it to dissolve, leading to the erosion and weakening of the limestone.

Each type of weathering plays a role in shaping the Earth's surface over time, and they often work together to break down rocks and minerals into smaller particles.

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Describe the structure of the cell membrane. how does the cell membrane affect the contents of the cell?

Answers

the cell membrane is made of a protein layer that is sandwiched between 2 phospolipid layers. It has pores that allow selective passage of substances in and out of the cell.

For multicellularity to develop, there must be a mechanism of signaling among cells in the multicellular organism. Which of the structures in the cell membrane receives signals from the environment or from other cells?

Answers

Answer:

Receptors

Explanation:

The cell membrane has receptors integrated or embedded into to it known as Membrane receptors or trans-membrane receptors . Membrane receptors are specialized proteins and act in cell signalling by receiving extracellular molecules by binding to them.

In multi-cellular organisms cell signalling allows speciation o groups of cells and when the signal is released the membrane receptors are the ones that will receive it.

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