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AlexFokin [52]
3 years ago
5

Fossils are found only in _____.

Biology
2 answers:
o-na [289]3 years ago
4 0
Fossils are only fount in sedimentary rocks.

lbvjy [14]3 years ago
4 0

fossils are found only in sedimentary rocks

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Researchers studying a small milkweed plant population note that some plants produce a toxin and other plants do not. They ident
kaheart [24]

Answer and Explanation:  

Due to technical problems, you will find the complete answer and explanation in the attached files

Download pdf
8 0
3 years ago
What is true concerning a quantitative trait? Multiple Choice Individuals fall into distinct classes for comparison The phenotyp
lana66690 [7]

Answer:

The phenotypic variation for the trait is continuous

Explanation:

Genetically speaking, quantitative traits are controlled by many genes, classes are not easily distinguishable and there is a continuous distribution of the phenotype. These characteristics refer to measurements of quantities (weights, volumes, measurements: kg, m, cm, g, m2, etc.).

In other words, quantitative characteristics are those that exhibit continuous variations and are partly of non-genetic origin; that is, they are greatly affected by the environment.

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3 years ago
Describe facilitated diffusion of ions through the channel proteins
Amiraneli [1.4K]

Facilitated diffusion is usually significant to pass the ions across the hydrophobic layer of the plasma membrane. Transmembrane integral protein and careers proteins provide the channels that allow the ion to pass across the membrane.  When an ion bind to their active site on the protein (note that the proteins are very selective), the protein changes conformation. It is this change in conformation opens up the channel that allows the ions to be passed across the membrane. When the ions are released inside of the cell, the protein resumes normal shape (and the channel also closes) and the active site becomes available again or another ion.

4 0
3 years ago
A unique feature of muscle tissue is that it is capable of
kogti [31]

Answer:

Contraction.

Explanation:

Muscle tissues are defined as they are elastic and extensible in nature. In other words it's also defined as they are able to stretched and returned to its original size and shapes. A unique feature of muscle tissue is they are able of contractile in nature. With the help of this contraction they are able to sliding myosin and actin filaments which are present in muscles tissues.

Basically muscle tissues are three types:

1) Skeletal muscle: They are strong and rapid in contraction.

2) Cardiac muscle: They are strong in contraction.

3) Smooth muscle tissues: They are slow and weak in contraction.

4 0
3 years ago
1. 1 Water makes up between 70-90% of the weight of most life forms, and nearly all chemicals present in living matter are solub
boyakko [2]

Answer:

The correct model is D.

Note: The first attachment below shows the different models. The second attachment shows the correct structural model of the water molecule.

Explanation:

A water molecule is composed of one atom of oxygen and two atoms of hydrogen.

A water molecule is polar, i.e. it contains positively and negatively opposite ends. The polar nature of the water molecule is due to strong electronegativity of oxygen which results in an uneven sharing of the bonding electrons between oxygen and hydrogen. The oxygen atom attracts the shared electrons more to itself, thereby, it acquires a partial negative charge, while the hydrogen atoms acquire a partial positive charge.

The bond angle between the oxygen and hydrogen atoms is approximately 105°. Therefore, from the first attachment below, the correct model for the water molecule is D.

4 0
3 years ago
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