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Gwar [14]
3 years ago
6

Select all that apply. In gymnosperms, pollination can occur by _____. bees

Biology
2 answers:
Ierofanga [76]3 years ago
5 0

The correct answer is the wind.

Gymnosperms are seeded plants whose seeds are naked, and are not enclosed in fruits. The male and female gametophyte structures develops in male and female cones.  Male and female cones borne on separate plants. In gymnosperms pollen grains are carried by winds to the naked ovules. Thus, pollination in gymnosperm is anemophily. After deposition of pollen grains on the ovule, pollen grain germinates, forming pollen tube which carries sperm cell preparation to fertilize with egg.  

MaRussiya [10]3 years ago
3 0
The wind and pollen dropping from trees

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Assuming no crossing over between the gene in question and the centromere, during what phase of meiosis do alleles segregate?
choli [55]

Answer:

During Anaphase stage

Explanation:

Meiosis is the type of cell division employed during gamete formation when each resulting gamete (daughter cell) has their chromosomal number reduced by half. Meiosis occurs in a two step division; Meiosis I and II. Meiosis I involves the separation of homologous chromosomes (similar but non-identical chromosomes received from each parent) while Meiosis II involves separation of sister chromatids (replicated chromosomes).

Alleles are present on the chromosomes which segregate or separate during the anaphase stage. Alleles received from each parent are separated in Anaphase I of meiosis I, which the identical replicated alleles are separated in anaphase of meiosis II.

7 0
4 years ago
What’s the answer to this earth science question?
Maksim231197 [3]

Answer:

option 1

Explanation:

The warm waters of the Gulf Stream run along the east coast of the United States. This provides an environment which is conducive to the development of hurricanes. The basics of the formation of a hurricane are as follows. Winds start blowing in a circular motion. This causes hot, moist air to rise. Clouds are formed and the winds start blowing faster and faster. This forms a low-pressure zone. The surrounding high-pressure zones pull the hurricane towards them. As the hurricane moves, it either picks up speed or decreases its speed and intensity.  

7 0
3 years ago
Can somebody explain to me photosynthesis as simple as possible please :)
NARA [144]

Answer:

it is the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water.

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5 0
3 years ago
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How can two organisms with a dominant trait for a specific feature produce an organism with a recessive trait for the same featu
Liono4ka [1.6K]

Answer:

If the two organisms are heterozygous for the dominant trait.

Explanation:

For every trait, a diploid organism receives two forms of gene called ALLELE, from each parent. Allele is the variant form of a gene.

According to Mendel's law of dominance, for a particular trait, an allele is capable of masking the expression of another allele in a gene. The expressed allele is called the DOMINANT allele while the masked allele is called the RECESSIVE allele. Due to this, an organism can express a dominant trait even in a combined or heterozygous state i.e. different alleles.

When the two heterozygous organisms mate or are crossed, they undergo meiosis and their alleles are separated into GAMETES according to Mendel's law of segregation. For example; an organism with genotype (genetic make-up) Aa will produce gametes with A and a alleles.

Note that, a recessive trait can only be expressed in a homozygous state i.e. same allele. Hence, the two heterozygous organisms will produce gametes containing the recessive allele, which will likely combine to produce a recessive phenotype or trait.

8 0
3 years ago
When there is insufficient research to determine the rda for a nutrient, the ______, based on estimates of intakes that appear t
Novosadov [1.4K]

Correct answer: Adequate intake

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It becomes an important guide in the absence of enough scientific evidence in order to establish an estimated average requirement. Adequate intake of a nutrient is determined after a lot of observation and research.

Hence, the correct answer would be Adequate intake.

8 0
3 years ago
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