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3 years ago

How does the structure of a hummingbird's beak make it more successful in its environment?

Biology

1 answer:

Softa [21]3 years ago

3 0

D.
It allows hummingbirds to access certain nutrients more efficiently than other species.

The long and thin beak allows the hummingbird to collect nectar from thin flowers.

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A new species of plant is discovered that closely resembles a known species. Upon further examination, it is discovered that the

ExtremeBDS [4]

Answer:

Explanation:

An error in cell division occurred in the known species, leading to the development of an autopolyploid tetraploid offspring that evolved into the new species.

7 0

3 years ago

The eggs of silk worm collected and kept in refrigerator in the winter season

qaws [65]

Answer:

The eggs are kept in a cool place so that they can be stored for a long time. In a favourable condition,they hatch into larva. Larva are produced in about 2 weeks from eggs at a temperature of 18 to 25 degree Celsius

Explanation:

8 0

3 years ago

2. Suppose that you and 19 of your classmates (giving a final population of 10 males and 10 females) are on a cruise, and your s

Trava [24]

Answer:

0.25%

Explanation:

20 people start the new population. So there are 20 genes or 40 alleles for the recessive disorder phenylketonuria. 2 out of 40 alleles are recessive for the condition hence frequency of the allele = 2/40 = 0.05

Frequency of the allele does not change when the population increases so it is in Hardy-Weinberg equilibrium. According to it, if q is the frequency of recessive allele, q² = frequency of the recessive condition

Here, q = 0.05 So,

q² = (0.05)² = 0.0025

In percentage, it is 100 * 0.0025 = 0.25%

Hence, incidence of phenylketonuria in the new population is 0.25%

3 0

3 years ago

A single-stranded DNA sequence is attached to a microarray chip, and fluorescently labeled complementary RNA (cRNA) fragments (p

Darya [45]

Answer:

Option A , Genome

Explanation:

Microarrays that contains array of single stranded DNA are used to study thousands of gene expression for all the genes of a genome and are usually termed as DNA miscroarrays. These microarrays being single stranded allows attachment of complementary DNA strand to bind to their surface. The mRNA from the cell is extracted and converted into cDNA which is further used for DNA cloning.

Hence, option A is correct

5 0

2 years ago

A scientist has discovered a new plant species in the Amazon rainforest. She tells her fellow scientists that the plant she has

tatiyna

Answer:

The correct option is C) It does not depend on insect pollination.

Explanation:

Angiosperms can simply be described as the plants which produce flowers whereas gymnosperms are the plants which do not produce flowers.

Both, the gymnosperms and the angiosperms, are capable of producing seeds. However, the seeds of the angiosperms are enclosed in an ovary. The seeds of gymnosperms are not enclosed.

One of the major differences between gymnosperms and angiosperms is that the angiosperms have to depend on animals for pollination. On the other hand, the seeds of gymnosperms are spread through the wind and are pollinated.

7 0

3 years ago