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4 years ago

The angiosperms are the sister phylum to which gymnosperm phylum?

1 answer:

3 0

The flowering plants, also known as angiosperms, are similar to gymnosperms which are capable of producing seeds. However they are distinguished from the latter by characteristics which includes flowers, endosperms within the seeds and the production of fruits that contain the seeds. They are the sister phylum to the following four gymnosperm groups namely, the conifers, cycad, gingko and gnetophytes.

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In the 1920s, bacteriologist Fred Griffith demonstrated that a heat-killed, infectious pneumococcus produced a substance that co

Juliette [100K]

Answer:

Some substance in the infectious S strain could change the harmless R strain into the more lethal form.

Explanation:

These first type of experiments where crucial to advance in DNA knowledge.

In one experiment, they treated the material with enzymes that destroy all proteins. This is important because scientist notice that there was something else that was causing the strain to change into a lethal form and was heritable (DNA). Know a days we know that plasmids are responsible for such transformation.

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3 years ago

A karyotype of a human who has normal sex chromosomes and 43 autosomes will exhibit ___?

slava [35]

That person will exhibit <span>monosomy,</span>

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3 years ago

use the samples; diamond, dolomite, gneiss, and chalk and provide your analysis of composition and identification based on their

Trava [24]

Answer:

Diamond-

Physical identification characters:

Color- White or Colorless

Lusture - admantine

Streak - Colorkess

Habit - Hour glass structure

Hardness - 10

Cleavage- octaheadral

Composition- pure carbon

Specific gravity-3.5

Dolomite (CaMg(CO3)2

Color - Colorless or white

Hardness is between 3-4

Reacts with any acid

Gneiss

Light and dark strip or banding present alternatively

biotite , pyroxene have Mafic mineral shows dark banding

Quartz, Feldspar have Felsic mineral for light banding

High grade metmorphic rock which is formed due to regional metamorphism of lower grade rock

Chalk(CaCO3)

Color-White

Very fragile

Hardness-1

With acid gives effervescence.

4 0

3 years ago

100 points + brainliest:3

trasher [3.6K]

Answer:

1. C

2. B

3. A

4. C

5. D

6. A

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2 years ago

The degree to which chromatin is compacted greatly affects its accessability for ____________ , and thus, gene expression.

iVinArrow [24]

The degree to which chromatin is compacted greatly affects its accessibility for transcription, and thus, gene expression.

<h3>What is Transcription?</h3>

This is the process which involves copying a segment of DNA into RNA in organisms.

When chromatin is condensed, DNA becomes less accessible for transcription factors and vice versa which was why it was chosen as the most appropriate choice.

Read more about Transcription here brainly.com/question/1048150

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3 years ago