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Novosadov [1.4K]
3 years ago
5

Pine cone seeds are produced in the __ of the __ cone. please help me out.!!

Biology
2 answers:
yarga [219]3 years ago
5 0
Seeds are produced Ovulae of the Female cone.
spin [16.1K]3 years ago
3 0

Pine cone seeds are produced in the <u>ovules</u> of the <u>female</u> cone.

Pine trees are evergreen coniferous trees with the presence of the characteristic needle like photosynthetic leaves. Pine trees have both the male and female cones on the same tree and are monoecious. The male cones are short lived and fall off after shedding pollen grains. The female cones are long lived and contain the ovules which are fertilized by the pollen to form seeds. Each female cone has spirally arranged scales with two seeds on each scale. On maturity, the cones release the seeds and are dispersed by wind or birds.

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The embryo implants itself to the walls of _________.
Anni [7]
It implants itself to the walls of the uterus (endometrium) by umbilical cord.
5 0
3 years ago
Which of the following is an example of sensors working during homeostasis?
Keith_Richards [23]
D) energy demands triggering a release of glucose.

Notice how the stimulant (low energy supply) triggers a restoration (normalizing) of a normal balance, which in this case is increasing energy supplied (glucose).
This process is called "homeostasis," or maintaining an internal balance.
8 0
2 years ago
Nuestro planeta esta habitada por numerosas ____, muchas de ellas extendidas en grandes y diversas zonas. Sin embargo, existen e
FinnZ [79.3K]

Answer:

Nuestro planeta esta habitada por numerosas <em>especies</em>, muchas de ellas extendidas en grandes y diversas zonas. Sin embargo, existen especies que habitan una sola <em>área/región</em> con características<em> ambientales</em> únicas para su desarrollo.

Explanation:  

Entre las miles de especies que habitan el planeta, muchas de ellas pueden estar ampliamente distribuidas, mostrando adaptaciones a una gran variedad de ambientes y hábitats, mientras que muchas otras solo se encuentran restringidas a determinadas areas o regiones particulares que presentan condiciones ambientales determinadas. Esta diferencia en distribución esta muy relacionada a la historia de la especie,  a la edad de la misma sobre la tierra, adaptaciones a los ambientes y capacidades reproductivas y de dispersión.

Dentro de la clasificación de especies de acuerdo a su distribución, podemos mencionar a las especies

  • nativas: aquellas que habitan y se distribuyen las áreas naturales donde se originaron,
  • endemicas: entran dentro del concepto de nativas, pero a parte se caracterizan por habitar <u><em>unicamente</em></u><em> una región en particular debido a las condiciones ambientales</em> que les son propicias para su desarrollo. Estas especies no pueden trasladarse a otras regiones.
  • exoticas: aquellas especies que salen de su area natural de distribución para habitar otras areas mas lejanas. Allí pueden establecerse e interactuar con especies nativas sin causar grandes daños.
  • invasoras: especies exoticas que llegan a otras areas, que se establecen y que tienen la capacidad de reproducirse a una tasa superior a la de las especies nativas, invadiendolas y desplazandolas. Interactuan con las especies nativas y causan daños importantes.

Los términos nativos, endemicos, exóticos son <em>relativos al área a la que se esté haciendo alusión</em>: un continente, un país, una región o un bioma.

5 0
2 years ago
if there are 500 people in a population, and 150 are homozygous HbA/hba, 150 are homozygous hbs/hbs, and 200 are heterozygous hb
sineoko [7]

Answer:

0.547

Explanation:

Given -

Total Population - 500

Individuals with homozygous HbA/hbA genotype - 150

Individuals with homozygous hbs/hbs genotype -150

Individuals with heterozygous hba/hbs genotype -  200

Let us assume the given population is in Hardy Weinberg' equilibrium

The frequency of individuals in the given population with homozygous HbA/hba genotype is equal to number of individuals with homozygous HbA/hba genotype divided by total population.

\frac{150}{500} \\= 0.3

The frequency of hba allele is equal to

\sqrt{0.3} \\= 0.5477

3 0
3 years ago
Which of the following is a possible ancestor to modern humans? a. Australopithecine Afarensis b. Australopithecine Robustus c.
BARSIC [14]
According to science, D would be the correct answer. Hope this helps!
7 0
3 years ago
Read 2 more answers
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