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3 years ago

Some animals have unique features,such as a stinger,claws, or the ability to change colors.These features are example of

Biology

2 answers:

Vikki [24]3 years ago

6 0

Answer:

Think its A> Recognition.

Stels [109]3 years ago

3 0

Answer:

Adaptations

Explanation:

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Of cells is one of the processes that help multicellular organisms maintain homeostasis

lord [1]

Answer:

Reproduction of cells is one of the processes that help multicellular organisms maintain homeostasis.

Explanation:

In biology, homeostasis can be described as the capability of an organism to maintain its constant internal environment despite the changes in the external environment.

External factors like pathogens in the environment tend to kill cells in our body like the skin cells and the immune cells. Through the process of cell division, our cells can reproduce and hence, maintain an equilibrium of the internal conditions.

Reproduction of cells also causes growth. Hence, the process of reproduction of cells maintains homeostasis.

5 0

3 years ago

A mutation in which type of cell would only affect the organism and not future generation

nata0808 [166]

Answer:

Somatic cells

Explanation:

A somatic cell mutation in an organism is passed on to the daughter cells in an organism. But this type of mutation doesn't affect the future generations because only genes carried by sperm or ova can become part of offspring's gene material.

5 0

3 years ago

What are two types of symbiosis?

olga nikolaevna [1]

Answer:

mutualism and parasitism

Examples:

mutualism: crocodiles and birds

parasitism: mosquitoes and humans

3 0

2 years ago

Stem cells may prove useful in the treatment of Type 1 diabetes because

timama [110]

Because they can be differentiated to form insulin-producing cells

5 0

3 years ago

When pink sweet peas were self-pollinated and the seeds were collected and sown, the following flower colors were obtained: Red

Pavlova-9 [17]

Answer:

c. 1:2:1

The results are consistent with incomplete dominance for this trait, with pink flowers being heterozygous.

Explanation:

If flower color were determined by a gene showing incomplete dominance, the possible genotypes and phenotypes are as follows:

RR- red
ww - white
Rw - pink

If pink sweet peas are self-pollinated, then a cross between two heterozygous individuals is done (Rw x Rw).

From this cross the expected ratios are:

1/4 RR (red)
2/4 Rw (pink)
1/4 ww (white)

So the null hypothesis is that the observed results exhibit a 1:2:1 ratio.

<h3>Chi square test</h3>

$X^{2} = \sum \frac{(Observed - Expected)^2}{Expected}$

The observed frequencies were:

34 Red
76 Pink
40 White

Total 150

The expected frequencies for our null hypothesis are:

1/4 x 150 = 37.5 Red
2/4 x 150 = 75 Pink
1/4 x 150 = 37.5 white

$X^{2} = \frac{(34- 37.5)^2}{37.5} + \frac{(76- 75)^2}{75} + \frac{(40- 37.5)^2}{37.5}$

$X^2=0.5067$

The degrees of freedom (DF) are calculated as number of phenotypes - 1; in this case DF = 3-1 = 2.

If we look at the Chi square table, for 2 DF and a probability of p0.05, the critical value is 5.991

Our X^2 value of 0.5067 is less than the critical value, so we do not reject the null hypothesis. The results are consistent with incomplete dominance for this trait, with pink flowers being heterozygous.

8 0

3 years ago