Why do you think leewenhoek was excited about what he saw

Entrepreneurs attempted, but failed, to harvest nuts from plantations grown in Southeast Asia. Attempts to grow Brazil nut trees

Anuta_ua [19.1K]

Answer:

The reason that there is no fruit even the plant produced healthy flowers maybe because

1. absences of pollinators due to declining poliinator population

2.weather conditions are preventing pollination

3. prevalence of flooding

Explanation:

1.Fruits are direct result of pollination. Due to the decrease in the number of pollinators especially orchid bees, some fruit bearing plants produce flowers but no fruit.

Bees decline their population because of parasites, diseases, exposure to chemicals and other environmental factors.

2.Unfavorable factors may prevent the agents of pollination to do their jobs. Bees and other insects may be hindered by wet or cold weather or some use of chemicals.

3.Brazil nut grow in lowland rainforest where there is no flooding.

4 0

2 years ago

What is the difference in structure of the antennae and antennules?

kap26 [50]

The difference in structure of the antennae and antennules is their size or length. Antennae are long sensory organs while antennules are short or small sensory organs. These organs are connected to the head of an insect, crab, or other animal and they are used for taste, balance, smell, touch, air motion and vibration

3 0

2 years ago

The incidence of Down syndrome, also known as trisomy 21, increases with increasing maternal age. Which of the following errors

Naily [24]

Answer:. Nondisjunction during meiosis I in either the male and female gamete

The failure of homologous chromosome to separate at mitosis, or failure of sister chromatids to separate at Anaphase of meiosis I or ii is called non-disjunction.

In this cell division anomaly the unsegregated chromosomes are separated into cells as single chromosomes, therefore extra copies are therefore inherited.This result is one of the cell having an extra copies of chromosomes than others( chromosomes 21.

If this extra chromosome copies is segregated into a sperm or egg, the resulting zygote cells will have extra copy as chromosome 21, and hence Down syndrome.

→It is more common in Meiosis 1 than ii,because of longer duration of the first stage of division than meiosis ii,given rooms to errors.

→Most common in women(with age increase) than men because of exchange of telomeres in them,which worsen with age. Their Meiotic mechanism which weaken with age, and more prone to errors compare to men,

Explanation:

5 0

2 years ago

Question 4 (1 point)

Wewaii [24]

Answer:

c) acidosis a higher carbon dioxide level

with alkalosis lower carbon dioxide

5 0

8 months ago

What change led to an increase in the number of dark colored moths within the population?

liubo4ka [24]

Answer:

The change that led to increase in the number of dark coloured mothe within the population because the evolution of the pepper moth is an evolutionary instance of directional colour change in the moth population as a consequence of air pollution during the Industrial Revolution the frequency of the dark – coloured moths increased at that time an example of the industrial is melanism.

May be this is ur answer u wanted ☺️

3 0

2 years ago