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2 years ago

Which structure anchors the chordae tendinae of the atrioventricular valves?

1 answer:

7 0

Answer: papillary muscle

Chordae tendinae is a connective tissue that used to prevent the heart valve to be flapped away. It like a string that connected into the valve and makes it look like a kite. Papillary muscle is the part that anchoring it to the heart wall.

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The outermost layer of the brain, the __________, is housed in the cerebrum.

Ilya [14]

The correct answer that would complete the given statement above is cerebral cortex. The outermost layer of the brain, the cerebral cortex, is housed in the cerebrum. The cerebral cortex consists of folded gray matter. It is responsible for the interpretation of input from different sources. The cerebral cortex lobes include the parietal, frontal, occipital and temporal lobes.

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2 years ago

Why does active transport require energy input by the cell?

kobusy [5.1K]

Because the molecules that are being transported is moving against its concentration gradient. in other words, its moving from where its low in concentration to where its high in concentration

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2 years ago

A population of 100 tigers has 30 with horizontal stripes. Using pedigrees, you ascertain that horizontal striping is caused by

bixtya [17]

Assuming that this population is in Hardy-Weinberg equilibrium, we can sayt that the probability that, given enough time, all tigers in the population will have horizontal stripes is 30% = 0.3.

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Available data:

Population size, N = 100 tigers
Number of Tigers with horizontal stripes = 30
Horizontal stripes is caused by an autosomal recessive mutation.

We need to know the probability that all tigers in the population will have horizontal stripes, which is the recessive phenotype.

We assume that the population is in Hardy-Weinberg equilibrium, so there should be no evolution.

Since the population is in H-W equilibrium, the allelic, genotypic and phenotypic frequencies will remain the same generation after generation.

Now, we will calculate the allelic and genotypic frequencies of horizontal striped individuals in the population.

There are 100 individuals, and only 30 have horizontal stripes.

So, the phenotypic frequency, F(HS) is 30/100 = 0.3 = 30%

Since this is a recessive phenotype, this value equals the genotypic frequency, F(hh) = 30%

Finally, we can get the allelic frequency by taking the square root of this value.

F(hh) = q² = 0.3

f(h) = q = √0.3 = 0.55 = 55%

According to these calcs, the probability for the fixation of the recessive allele is 55%, and the probability that all individuals express the recessive horizontal stripes phenotype is 30%.

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You can learn more about Hardy-Weinberg equilibrium at

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2 years ago

Need help will give brainliest

masha68 [24]

Hii! I believe the answer is D. The brown beetles were better able to survive to reproductive age and pass on their traits. (:

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2 years ago

Read 2 more answers

The two divisions of the peripheral nervous system are the

Elina [12.6K]

Answer: I GOT YOU!!!

Peripheral Nervous System. The peripheral nervous system is divided into two major parts: the somatic nervous system and the autonomic nervous system.

Explanation:

I hope this helps have a great day

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2 years ago