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Setler79 [48]
3 years ago
14

A 75 year old man need a replacement heart valve .he lives alone and cares for himself .is a mechanical or biological heart more

suited for him
Biology
1 answer:
WITCHER [35]3 years ago
7 0
Biological heart is more suited for him
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If the allele for a long nose (N) is dominant to the allele for a short nose (n), what will be the relative frequency of n in a
Nastasia [14]

Answer: The answer should be C. I Hope that helped :)

Explanation:

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3 years ago
How much chemical energy (stored as biomass) is available to primary consumers from 10,000 kcal of primary productivity?
atroni [7]
The answer is “d” (1,000 kcal). As the trophic level increases energy is decreases by 10 times that of the previous level. If a system has 10,000 kcal, then the primary consumer have 10 times less (10,000/10) which is 1,000 kcal. The secondary consumers have 100 kcal and the tertiary have 10 kcal. Only 10% of the energy at each trophic level goes on to the next.
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2 years ago
A plant produces its own food through the process of photosynthesis. Which of the following materials do plants need in order to
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The materials plants need in order to perform photosynthesis are Water and carbon dioxide.

<h3>What is photosynthesis?</h3>

Photosynthesis is a process of converting light energy into chemical energy.

Photosynthesis is performed by chlorophyll-containing plants to produce their food.

The process of photosynthesis is carried out in the presence of sunlight.

It requires water, carbon dioxide, and sunlight.

Thus, the correct option is B, water, and carbon dioxide.

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3 0
2 years ago
The treelike fibers that receive information and send it toward the neuron's cell body are called ____
Firdavs [7]

Answer:

The treelike fibers that receive information and send it toward the neuron's cell body are called Dendrite

Explanation:

Dendrite:-  They are tree like projections generally the extension of nerve cell which helps in the transmission of nerve impulses or electrochemical stimulation from one neuron to another. It is also known as dendrons. For neurons to become active they need some action potential, these action potentials are received in the form of nerve impulses or electrochemical stimulation by dendrite and is been stored  in the cell body, or soma, of the neuron. Dendrites are covered by synapses (Structure that permit neural transmission).

3 0
3 years ago
A recessive allele causes phenylketonuria (PKU) when homozygote. If the frequency of the recessive allele is 0.05 in the populat
Radda [10]

Answer:

0.095

Explanation:

Phenylkentonuria is a disease caused by a recessive allele.

The frequency of the recessive allele + the frequency of the dominant allele equals 1.

The frequency of the recessive allele is q = 0.05

The frequency of the dominant allele then is p = 1  - q = 0.95

If people mate randomly, the frequency of the homozygous dominant genotype will be p², the frequency of the heterozygous genotype will be 2pq and the frequency of the homozygous recessive genotype will be q² .

2pq=2× 0.05 × 0.95

2pq=0.095

The heterozygote frequency in the population is 0.095

4 0
3 years ago
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