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Mrrafil [7]
3 years ago
10

Which plant group is characterized by dominant sporophyte, vascular tissues, and seeds exposed on cones

Biology
1 answer:
Alborosie3 years ago
3 0
Gymnosperm is the plant group that is characterized by sporophyte, vascular tissue and seeds exposed on cones. Examples of such plants are conifers and cycads.
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The illustration below shows the steps of meiosis I. What is the step that is labeled D? metaphase I metaphase II telophase II t
WITCHER [35]

The right answer is metaphase II.

The process is performed in two nuclear and cytoplasmic divisions, called first and second meiotic division or simply meiosis I and meiosis II. Both include prophase, metaphase, anaphase, and telophase. First division prophase is long and consists of 5 stages: leptotene, zygotene, pachytene, diplotene, and diakinesis. It is at this point that genetic recombination takes place at the level of chiasmus.

During meiosis I, the members of each homologous pair of chromosomes are paired during prophase, forming bivalents. During this phase, a protein structure, called synaptonemal complex form, allows recombination between homologous chromosomes. Subsequently, a large condensation of the bivalent chromosomes occurs and go to the metaphase plate during the first metaphase, resulting in the migration of n chromosomes to each of the poles during the first anaphase. This reduction division is responsible for maintaining the number of chromosomes characteristic of each species.

In meiosis II, as in mitosis, the sister chromatids comprising each chromosome are separated and distributed between the nuclei of the daughter cells. Between these two successive steps, there is no DNA replication. The maturation of the daughter cells will result in the gametes.

7 0
3 years ago
Read 2 more answers
Animals lose heat through the surface areas of their skin. A small animal, such as a mouse, uses a much larger proportion of its
Goryan [66]

Answer:

Because of the difference in surface area to volume ratio

Explanation:

Surface are to volume ratio is the area of an object that is exposed to the external environment (surface area), compared to the amount within an object (volume).

Therefore an elephant has a lower surface area to volume ratio than a mouse.

The smaller an object is the greater its surface area to volume ratio.

Small animals have much more surface area per mass than large animals. With so much surface area, they lose heat very quickly. So, a mouse, with a lot of surface area per mass, must spend a lot more energy to stay warm than a large animal.

5 0
3 years ago
Read 2 more answers
The interaction among animals of the same species is called courtship.
xeze [42]

The definition of courtship is "the behavior of male birds and other animals aimed at attracting to a mate"

So yes, the answer is true.

6 0
3 years ago
Describe in your own words how a plant with a yellow pod can have two green-pod parents.
kupik [55]

Answer:

Selective breeding.

Explanation:

Sorry thats the only one i can think of. BTW have u watched lucky star.

I love anime.

4 0
3 years ago
A bacterial genome is typically a single linear piece of DNA. multiple linear pieces of DNA. a linear RNA molecule. a single cir
Schach [20]

Answer:

The correct answer is Single Circular DNA Molecule.

Explanation:

A bacterial genome, which is the DNA that is found in bacteria collectively, is a double stranded circular DNA. So it has no start and end like double stranded helix DNA. The option D, which is "Single Circular DNA Molecule" is correct.

I hope this answer helps.

6 0
3 years ago
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