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Vinil7 [7]
3 years ago
14

______ are structures that allow for one-way blood flow through the heart.

Biology
2 answers:
Eva8 [605]3 years ago
9 0
Valves are structures that allow for one-way blood flow through the heart.
Grace [21]3 years ago
4 0
The answer is valves. Valves exist all throughout the cardiovascular system, but are especially important in the heart. 
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What are Homologous Structures in Evolution?
Ierofanga [76]

Because they were passed down from a common ancestor, homologous structures are those found in related organisms that are comparable. These structures might or might not serve the same purpose in their offspring. The hands of various different mammals are depicted in the figure below. The basic skeletal structure of each is the same.

What is offsrping?

a person, animal, or plant's offspring or progeny is the result of reproduction. Parental transmission of the illness can affect children,  a human or animal's direct offspring; a person born of parents  gave birth to a lone child.

Creating offspring is considered reproduction. Reproduction comes in two basic forms: sexual reproduction and asexual reproduction. A sexually reproducing creature integrates the genetic material of both parents to create a genetically distinct individual. Asexual reproduction involves the self-replication of one parent to create genetically identical kids.

To learn more about offsrping

Here: brainly.com/question/471576

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5 0
1 year ago
The Researches talk about a "Balance" within the Ecosystem that Exists within the
seropon [69]

Answer:

the balance is everything must have a process of living and dying in an ecosystem. such as, an animal killing another animal for prey to eat it, that is a process. in a water ecosystem, fish lay eggs and come out and usually get eaten by a bigger animal, as they grow up, usually by bigger fish itself such as the Grayling.

Explanation:

4 0
3 years ago
Please help me on both questions. i don’t know at all and i’m so confused
Mademuasel [1]

Answer:

cant really answer much since you need the class results for these. but i can simplify question 1. so, does the class results prove that the traits made my dominant alleles are the most common? or in other words, are traits made  by dominant alleles most common in the class results?

number 4 is yes because there are more possibilities that the dominant trait will occur than the recessive trait. therefore, it is more common and the conception is correct

6 0
3 years ago
How many NEUTRONS does an element have if it’s atomic number is 44 and it’s mass number is 154 ?
krek1111 [17]

If the element has a atomic number of forty-four then the amount of neutrons would be "fifty-seven." This element is actually called Ruthenium and it has forty-four protons, and electrons, and it has fifty-seven neutrons and you can determine this by using this equation then solve:

44 + N = 101

= 57

Hope this helps!

6 0
3 years ago
In natural selection what must be true of traits that are passed down through generationsal selection where do the alleles or tr
goblinko [34]
I'm not sure if I will answer the question you asked, as I many have interpreted it incorrectly. In natural selection, there must be variance in the gene pool, the total frequency of alleles in a population. Now, one of the organisms may have a gene that somehow helps them survive from the selective force much better compared to the others. If this does happen, over time the gene pool will narrow down to become just the genes of that organism that survived better in the first place because the rest would be taken care of by the selective force. So, the alleles and trait come from the first organisms that had the advantage over the others of its species.
3 0
3 years ago
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