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leva [86]
3 years ago
8

Action potentials received directly from ________________ stimulate the papillary muscles to contract allowing for the proper __

_____________ of the AV valves.
Biology
1 answer:
BartSMP [9]3 years ago
7 0
Atrioventricular node; closing
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A woman with color-normal vision, but whose father was color blind, marries a man with normal vision. They are expecting a child
kotegsom [21]

To know what happens here, you need to analyze the alleles.

If the father is color blind and the daughter is not, you can suppose that is a recessive allele.

You can tell she is a carrier only, and because we received one sexual allele from each parent. If they ask you about the gender, we can suppose a cross between Xx and XY being lower x the recessive allele (color-blind vision).

When you draw the Punnett square, you'll found the probabilities are XX, XY, Xx, and xY.

So, you have a 50% chance of having a boy and 25% chance of having a color-blind boy.

4 0
3 years ago
The economy of agrarian society is based on which of these activities
AleksandrR [38]

Answer: Farming

Explanation: Plowing the land is the  first source of wealth.

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2 years ago
Researchers discover that a north american bird species called a brown thrasher has a very similar beak structure to one of darw
o-na [289]
The answer would be analogous and convergent evolution. In evolutionary biology, convergent evolution is the procedure whereby creatures not carefully related, self-sufficiently evolve alike traits as an outcome of taking to familiarize to like surroundings. The beaks can be described as analogous since there is a similarity of structures that came from different origins.
6 0
3 years ago
(06.06 MC) Which of the following correctly describes the relationship depicted in the diagram below? The image shows a Venn dia
Troyanec [42]

Answer:

<u>C.  the types of cells and the tissues in which they can be found in a plant.</u>

5 0
3 years ago
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The medullary cavity is Select one: a. empty in adult bones. b. the site where osteoblasts are found. c. lined with endosteum. d
katrin [286]

Answer:

C- Lined with Endosteum

Explanation:

The medullary cavity, also called the marrow cavity, stores red and yellow bone marrow (or adipose tissue). It is the central cavity in the shaft of bones.

Endosteum lines the inner surface of the medullary cavity. It is a thin, vascular membrane of connective tissue with the purpose of being absorbed when a person is malnourished.

6 0
2 years ago
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